add feature-env plugin & add spring cloud gateway staining plugin. (#533)

CHANGELOG.md

@@ -23,3 +23,4 @@
 - [Code optimization for rpc-enhancement module](https://github.com/Tencent/spring-cloud-tencent/pull/526)
 - [Feature: Optimized configuration update](https://github.com/Tencent/spring-cloud-tencent/pull/528)
 - [Feature：support pushGateway push metrics](https://github.com/Tencent/spring-cloud-tencent/pull/529)
+- [add feature-env plugin & add spring cloud gateway staining plugin](https://github.com/Tencent/spring-cloud-tencent/pull/533)

spring-cloud-starter-tencent-metadata-transfer/src/main/java/com/tencent/cloud/metadata/core/CustomTransitiveMetadataResolver.java

@@ -25,6 +25,7 @@ import java.util.Map;
 
 import javax.servlet.http.HttpServletRequest;
 
+import com.tencent.cloud.common.constant.MetadataConstant;
 import org.apache.commons.lang.StringUtils;
 
 import org.springframework.http.HttpHeaders;
@@ -37,8 +38,7 @@ import org.springframework.web.server.ServerWebExchange;
  * @author lepdou 2022-05-20
  */
 public final class CustomTransitiveMetadataResolver {
-	private static final String TRANSITIVE_HEADER_PREFIX = "X-SCT-Metadata-Transitive-";
+
-	private static final int TRANSITIVE_HEADER_PREFIX_LENGTH = TRANSITIVE_HEADER_PREFIX.length();
 	private CustomTransitiveMetadataResolver() {
 	}
 
@@ -48,10 +48,20 @@ public final class CustomTransitiveMetadataResolver {
 		HttpHeaders headers = exchange.getRequest().getHeaders();
 		for (Map.Entry<String, List<String>> entry : headers.entrySet()) {
 			String key = entry.getKey();
+			if (StringUtils.isBlank(key)) {
+				continue;
+			}
+			// resolve sct transitive header
+			if (StringUtils.startsWithIgnoreCase(key, MetadataConstant.SCT_TRANSITIVE_HEADER_PREFIX)
+					&& !CollectionUtils.isEmpty(entry.getValue())) {
+				String sourceKey = StringUtils.substring(key, MetadataConstant.SCT_TRANSITIVE_HEADER_PREFIX_LENGTH);
+				result.put(sourceKey, entry.getValue().get(0));
+			}
 
-			if (StringUtils.isNotBlank(key) && StringUtils.startsWithIgnoreCase(key, TRANSITIVE_HEADER_PREFIX)
+			//resolve polaris transitive header
+			if (StringUtils.startsWithIgnoreCase(key, MetadataConstant.POLARIS_TRANSITIVE_HEADER_PREFIX)
 					&& !CollectionUtils.isEmpty(entry.getValue())) {
-				String sourceKey = StringUtils.substring(key, TRANSITIVE_HEADER_PREFIX_LENGTH);
+				String sourceKey = StringUtils.substring(key, MetadataConstant.POLARIS_TRANSITIVE_HEADER_PREFIX_LENGTH);
 				result.put(sourceKey, entry.getValue().get(0));
 			}
 		}
@@ -65,10 +75,21 @@ public final class CustomTransitiveMetadataResolver {
 		Enumeration<String> headers = request.getHeaderNames();
 		while (headers.hasMoreElements()) {
 			String key = headers.nextElement();
+			if (StringUtils.isBlank(key)) {
+				continue;
+			}
+
+			// resolve sct transitive header
+			if (StringUtils.startsWithIgnoreCase(key, MetadataConstant.SCT_TRANSITIVE_HEADER_PREFIX)
+					&& StringUtils.isNotBlank(request.getHeader(key))) {
+				String sourceKey = StringUtils.substring(key, MetadataConstant.SCT_TRANSITIVE_HEADER_PREFIX_LENGTH);
+				result.put(sourceKey, request.getHeader(key));
+			}
 
-			if (StringUtils.isNotBlank(key) && StringUtils.startsWithIgnoreCase(key, TRANSITIVE_HEADER_PREFIX)
+			// resolve polaris transitive header
+			if (StringUtils.startsWithIgnoreCase(key, MetadataConstant.POLARIS_TRANSITIVE_HEADER_PREFIX)
 					&& StringUtils.isNotBlank(request.getHeader(key))) {
-				String sourceKey = StringUtils.substring(key, TRANSITIVE_HEADER_PREFIX_LENGTH);
+				String sourceKey = StringUtils.substring(key, MetadataConstant.POLARIS_TRANSITIVE_HEADER_PREFIX_LENGTH);
 				result.put(sourceKey, request.getHeader(key));
 			}
 		}

spring-cloud-starter-tencent-metadata-transfer/src/test/java/com/tencent/cloud/metadata/core/CustomTransitiveMetadataResolverTest.java

@@ -34,7 +34,7 @@ import org.springframework.mock.web.server.MockServerWebExchange;
 public class CustomTransitiveMetadataResolverTest {
 
 	@Test
-	public void test() {
+	public void testSCTTransitiveMetadata() {
 		MockServerHttpRequest.BaseBuilder<?> builder = MockServerHttpRequest.get("");
 		builder.header("X-SCT-Metadata-Transitive-a", "test");
 		MockServerWebExchange exchange = MockServerWebExchange.from(builder);
@@ -44,11 +44,30 @@ public class CustomTransitiveMetadataResolverTest {
 	}
 
 	@Test
-	public void testServlet() {
+	public void testPolarisTransitiveMetadata() {
+		MockServerHttpRequest.BaseBuilder<?> builder = MockServerHttpRequest.get("");
+		builder.header("X-Polaris-Metadata-Transitive-a", "test");
+		MockServerWebExchange exchange = MockServerWebExchange.from(builder);
+		Map<String, String> resolve = CustomTransitiveMetadataResolver.resolve(exchange);
+		Assertions.assertThat(resolve.size()).isEqualTo(1);
+		Assertions.assertThat(resolve.get("a")).isEqualTo("test");
+	}
+
+	@Test
+	public void testSCTServletTransitiveMetadata() {
 		MockHttpServletRequest request = new MockHttpServletRequest();
 		request.addHeader("X-SCT-Metadata-Transitive-a", "test");
 		Map<String, String> resolve = CustomTransitiveMetadataResolver.resolve(request);
 		Assertions.assertThat(resolve.size()).isEqualTo(1);
 		Assertions.assertThat(resolve.get("a")).isEqualTo("test");
 	}
+
+	@Test
+	public void testPolarisServletTransitiveMetadata() {
+		MockHttpServletRequest request = new MockHttpServletRequest();
+		request.addHeader("X-Polaris-Metadata-Transitive-a", "test");
+		Map<String, String> resolve = CustomTransitiveMetadataResolver.resolve(request);
+		Assertions.assertThat(resolve.size()).isEqualTo(1);
+		Assertions.assertThat(resolve.get("a")).isEqualTo("test");
+	}
 }

spring-cloud-starter-tencent-polaris-ratelimit/src/main/java/com/tencent/cloud/polaris/ratelimit/RateLimitRuleLabelResolver.java

@@ -24,7 +24,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
-import com.tencent.cloud.common.util.ExpressionLabelUtils;
+import com.tencent.cloud.common.util.expresstion.ExpressionLabelUtils;
 import com.tencent.cloud.polaris.context.ServiceRuleManager;
 import com.tencent.polaris.client.pb.ModelProto;
 import com.tencent.polaris.client.pb.RateLimitProto;

spring-cloud-starter-tencent-polaris-ratelimit/src/main/java/com/tencent/cloud/polaris/ratelimit/filter/QuotaCheckReactiveFilter.java

@@ -28,7 +28,7 @@ import javax.annotation.PostConstruct;
 
 import com.google.common.collect.Maps;
 import com.tencent.cloud.common.metadata.MetadataContext;
-import com.tencent.cloud.common.util.ExpressionLabelUtils;
+import com.tencent.cloud.common.util.expresstion.SpringWebExpressionLabelUtils;
 import com.tencent.cloud.polaris.ratelimit.RateLimitRuleLabelResolver;
 import com.tencent.cloud.polaris.ratelimit.config.PolarisRateLimitProperties;
 import com.tencent.cloud.polaris.ratelimit.constant.RateLimitConstant;
@@ -161,6 +161,6 @@ public class QuotaCheckReactiveFilter implements WebFilter, Ordered {
 
 	private Map<String, String> getRuleExpressionLabels(ServerWebExchange exchange, String namespace, String service) {
 		Set<String> expressionLabels = rateLimitRuleLabelResolver.getExpressionLabelKeys(namespace, service);
-		return ExpressionLabelUtils.resolve(exchange, expressionLabels);
+		return SpringWebExpressionLabelUtils.resolve(exchange, expressionLabels);
 	}
 }

spring-cloud-starter-tencent-polaris-ratelimit/src/main/java/com/tencent/cloud/polaris/ratelimit/filter/QuotaCheckServletFilter.java

@@ -31,7 +31,7 @@ import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
 import com.tencent.cloud.common.metadata.MetadataContext;
-import com.tencent.cloud.common.util.ExpressionLabelUtils;
+import com.tencent.cloud.common.util.expresstion.ServletExpressionLabelUtils;
 import com.tencent.cloud.polaris.ratelimit.RateLimitRuleLabelResolver;
 import com.tencent.cloud.polaris.ratelimit.config.PolarisRateLimitProperties;
 import com.tencent.cloud.polaris.ratelimit.constant.RateLimitConstant;
@@ -158,6 +158,6 @@ public class QuotaCheckServletFilter extends OncePerRequestFilter {
 
 	private Map<String, String> getRuleExpressionLabels(HttpServletRequest request, String namespace, String service) {
 		Set<String> expressionLabels = rateLimitRuleLabelResolver.getExpressionLabelKeys(namespace, service);
-		return ExpressionLabelUtils.resolve(request, expressionLabels);
+		return ServletExpressionLabelUtils.resolve(request, expressionLabels);
 	}
 }

spring-cloud-starter-tencent-polaris-ratelimit/src/test/java/com/tencent/cloud/polaris/ratelimit/filter/QuotaCheckReactiveFilterTest.java

@@ -26,7 +26,7 @@ import java.util.concurrent.CountDownLatch;
 
 import com.tencent.cloud.common.metadata.MetadataContext;
 import com.tencent.cloud.common.util.ApplicationContextAwareUtils;
-import com.tencent.cloud.common.util.ExpressionLabelUtils;
+import com.tencent.cloud.common.util.expresstion.SpringWebExpressionLabelUtils;
 import com.tencent.cloud.polaris.ratelimit.RateLimitRuleLabelResolver;
 import com.tencent.cloud.polaris.ratelimit.config.PolarisRateLimitProperties;
 import com.tencent.cloud.polaris.ratelimit.constant.RateLimitConstant;
@@ -74,15 +74,15 @@ import static org.mockito.Mockito.when;
 public class QuotaCheckReactiveFilterTest {
 
 	private static MockedStatic<ApplicationContextAwareUtils> mockedApplicationContextAwareUtils;
-	private static MockedStatic<ExpressionLabelUtils> expressionLabelUtilsMockedStatic;
+	private static MockedStatic<SpringWebExpressionLabelUtils> expressionLabelUtilsMockedStatic;
 	private final PolarisRateLimiterLabelReactiveResolver labelResolver =
 			exchange -> Collections.singletonMap("ReactiveResolver", "ReactiveResolver");
 	private QuotaCheckReactiveFilter quotaCheckReactiveFilter;
 
 	@BeforeClass
 	public static void beforeClass() {
-		expressionLabelUtilsMockedStatic = mockStatic(ExpressionLabelUtils.class);
+		expressionLabelUtilsMockedStatic = mockStatic(SpringWebExpressionLabelUtils.class);
-		when(ExpressionLabelUtils.resolve(any(ServerWebExchange.class), anySet()))
+		when(SpringWebExpressionLabelUtils.resolve(any(ServerWebExchange.class), anySet()))
 				.thenReturn(Collections.singletonMap("RuleLabelResolver", "RuleLabelResolver"));
 
 		mockedApplicationContextAwareUtils = Mockito.mockStatic(ApplicationContextAwareUtils.class);

spring-cloud-starter-tencent-polaris-ratelimit/src/test/java/com/tencent/cloud/polaris/ratelimit/filter/QuotaCheckServletFilterTest.java

@@ -30,7 +30,7 @@ import javax.servlet.http.HttpServletRequest;
 
 import com.tencent.cloud.common.metadata.MetadataContext;
 import com.tencent.cloud.common.util.ApplicationContextAwareUtils;
-import com.tencent.cloud.common.util.ExpressionLabelUtils;
+import com.tencent.cloud.common.util.expresstion.SpringWebExpressionLabelUtils;
 import com.tencent.cloud.polaris.ratelimit.RateLimitRuleLabelResolver;
 import com.tencent.cloud.polaris.ratelimit.config.PolarisRateLimitProperties;
 import com.tencent.cloud.polaris.ratelimit.spi.PolarisRateLimiterLabelServletResolver;
@@ -74,7 +74,7 @@ import static org.mockito.Mockito.when;
 public class QuotaCheckServletFilterTest {
 
 	private static MockedStatic<ApplicationContextAwareUtils> mockedApplicationContextAwareUtils;
-	private static MockedStatic<ExpressionLabelUtils> expressionLabelUtilsMockedStatic;
+	private static MockedStatic<SpringWebExpressionLabelUtils> expressionLabelUtilsMockedStatic;
 	private final PolarisRateLimiterLabelServletResolver labelResolver =
 			exchange -> Collections.singletonMap("ServletResolver", "ServletResolver");
 	private QuotaCheckServletFilter quotaCheckServletFilter;
@@ -82,8 +82,8 @@ public class QuotaCheckServletFilterTest {
 
 	@BeforeClass
 	public static void beforeClass() {
-		expressionLabelUtilsMockedStatic = mockStatic(ExpressionLabelUtils.class);
+		expressionLabelUtilsMockedStatic = mockStatic(SpringWebExpressionLabelUtils.class);
-		when(ExpressionLabelUtils.resolve(any(ServerWebExchange.class), anySet()))
+		when(SpringWebExpressionLabelUtils.resolve(any(ServerWebExchange.class), anySet()))
 				.thenReturn(Collections.singletonMap("RuleLabelResolver", "RuleLabelResolver"));
 
 		mockedApplicationContextAwareUtils = Mockito.mockStatic(ApplicationContextAwareUtils.class);
@@ -92,7 +92,7 @@ public class QuotaCheckServletFilterTest {
 	}
 
 	@AfterClass
-	public static void afterClass() throws Exception {
+	public static void afterClass() {
 		mockedApplicationContextAwareUtils.close();
 		expressionLabelUtilsMockedStatic.close();
 	}
@@ -129,8 +129,7 @@ public class QuotaCheckServletFilterTest {
 		RateLimitRuleLabelResolver rateLimitRuleLabelResolver = mock(RateLimitRuleLabelResolver.class);
 		when(rateLimitRuleLabelResolver.getExpressionLabelKeys(anyString(), anyString())).thenReturn(Collections.emptySet());
 
-		this.quotaCheckServletFilter = new QuotaCheckServletFilter(
+		this.quotaCheckServletFilter = new QuotaCheckServletFilter(limitAPI, labelResolver, polarisRateLimitProperties, rateLimitRuleLabelResolver);
-				limitAPI, labelResolver, polarisRateLimitProperties, rateLimitRuleLabelResolver);
 		this.quotaCheckWithHtmlRejectTipsServletFilter = new QuotaCheckServletFilter(
 				limitAPI, labelResolver, polarisRateLimitWithHtmlRejectTipsProperties, rateLimitRuleLabelResolver);
 	}

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/PolarisRouterContext.java

@@ -18,11 +18,17 @@
 
 package com.tencent.cloud.polaris.router;
 
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Map;
+import java.util.Set;
+
+import org.apache.commons.lang.StringUtils;
 
 import org.springframework.util.CollectionUtils;
+import org.springframework.util.LinkedCaseInsensitiveMap;
 
 /**
  * the context for router.
@@ -32,13 +38,13 @@ import org.springframework.util.CollectionUtils;
 public class PolarisRouterContext {
 
 	/**
-	 * the label for rule router.
+	 * the labels for rule router, contain transitive metadata.
 	 */
-	public static final String RULE_ROUTER_LABELS = "ruleRouter";
+	public static final String ROUTER_LABELS = "allMetadata";
 	/**
 	 * transitive labels.
 	 */
-	public static final String TRANSITIVE_LABELS = "transitive";
+	public static final String TRANSITIVE_LABELS = "transitiveMetadata";
 
 	private Map<String, Map<String, String>> labels;
 
@@ -53,10 +59,62 @@ public class PolarisRouterContext {
 		return Collections.unmodifiableMap(subLabels);
 	}
 
-	public void setLabels(String labelType, Map<String, String> subLabels) {
+	public Map<String, String> getLabels(String labelType, Set<String> labelKeys) {
+		if (CollectionUtils.isEmpty(labelKeys)) {
+			return Collections.emptyMap();
+		}
+
+		Map<String, String> typeLabels = getLabels(labelType);
+		if (CollectionUtils.isEmpty(typeLabels)) {
+			return Collections.emptyMap();
+		}
+
+		Map<String, String> labels = new HashMap<>();
+		for (String key : labelKeys) {
+			String value = typeLabels.get(key);
+			if (StringUtils.isNotBlank(value)) {
+				labels.put(key, value);
+			}
+		}
+		return labels;
+	}
+
+	public String getLabel(String labelKey) {
+		Map<String, String> routerLabels = labels.get(ROUTER_LABELS);
+		if (CollectionUtils.isEmpty(routerLabels)) {
+			return StringUtils.EMPTY;
+		}
+		return routerLabels.get(labelKey);
+	}
+
+	public Set<String> getLabelAsSet(String labelKey) {
+		Map<String, String> routerLabels = labels.get(ROUTER_LABELS);
+		if (CollectionUtils.isEmpty(routerLabels)) {
+			return Collections.emptySet();
+		}
+
+		for (Map.Entry<String, String> entry : routerLabels.entrySet()) {
+			if (StringUtils.equalsIgnoreCase(labelKey, entry.getKey())) {
+				String keysStr = entry.getValue();
+				if (StringUtils.isNotBlank(keysStr)) {
+					String[] keysArr = StringUtils.split(keysStr, ",");
+					return new HashSet<>(Arrays.asList(keysArr));
+				}
+			}
+		}
+
+		return Collections.emptySet();
+	}
+
+	public void putLabels(String labelType, Map<String, String> subLabels) {
 		if (this.labels == null) {
 			this.labels = new HashMap<>();
 		}
-		labels.put(labelType, subLabels);
+
+		Map<String, String> subLabelMap = new LinkedCaseInsensitiveMap<>();
+		if (!CollectionUtils.isEmpty(subLabels)) {
+			subLabelMap.putAll(subLabels);
+		}
+		labels.put(labelType, subLabelMap);
 	}
 }

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/PolarisRouterServiceInstanceListSupplier.java

@@ -31,23 +31,17 @@ import com.tencent.cloud.common.metadata.MetadataContextHolder;
 import com.tencent.cloud.common.pojo.PolarisServiceInstance;
 import com.tencent.cloud.common.util.JacksonUtils;
 import com.tencent.cloud.polaris.loadbalancer.LoadBalancerUtils;
-import com.tencent.cloud.polaris.router.config.PolarisMetadataRouterProperties;
-import com.tencent.cloud.polaris.router.config.PolarisNearByRouterProperties;
-import com.tencent.cloud.polaris.router.config.PolarisRuleBasedRouterProperties;
 import com.tencent.cloud.polaris.router.resttemplate.PolarisLoadBalancerRequest;
+import com.tencent.cloud.polaris.router.spi.RouterRequestInterceptor;
+import com.tencent.cloud.polaris.router.spi.RouterResponseInterceptor;
 import com.tencent.polaris.api.exception.ErrorCode;
 import com.tencent.polaris.api.exception.PolarisException;
 import com.tencent.polaris.api.pojo.Instance;
 import com.tencent.polaris.api.pojo.ServiceInfo;
 import com.tencent.polaris.api.pojo.ServiceInstances;
-import com.tencent.polaris.plugins.router.metadata.MetadataRouter;
-import com.tencent.polaris.plugins.router.nearby.NearbyRouter;
-import com.tencent.polaris.plugins.router.rule.RuleBasedRouter;
 import com.tencent.polaris.router.api.core.RouterAPI;
 import com.tencent.polaris.router.api.rpc.ProcessRoutersRequest;
 import com.tencent.polaris.router.api.rpc.ProcessRoutersResponse;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import reactor.core.publisher.Flux;
 
 import org.springframework.cloud.client.ServiceInstance;
@@ -59,6 +53,8 @@ import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;
 import org.springframework.http.HttpHeaders;
 import org.springframework.util.CollectionUtils;
 
+import static com.tencent.cloud.common.constant.ContextConstant.UTF_8;
+
 /**
  * Service routing entrance.
  *
@@ -73,23 +69,17 @@ import org.springframework.util.CollectionUtils;
  */
 public class PolarisRouterServiceInstanceListSupplier extends DelegatingServiceInstanceListSupplier {
 
-	private static final Logger LOGGER = LoggerFactory.getLogger(PolarisRouterServiceInstanceListSupplier.class);
-
-	private final PolarisNearByRouterProperties polarisNearByRouterProperties;
-	private final PolarisMetadataRouterProperties polarisMetadataRouterProperties;
-	private final PolarisRuleBasedRouterProperties polarisRuleBasedRouterProperties;
 	private final RouterAPI routerAPI;
+	private final List<RouterRequestInterceptor> requestInterceptors;
+	private final List<RouterResponseInterceptor> responseInterceptors;
 
 	public PolarisRouterServiceInstanceListSupplier(ServiceInstanceListSupplier delegate,
-			RouterAPI routerAPI,
+			RouterAPI routerAPI, List<RouterRequestInterceptor> requestInterceptors,
-			PolarisNearByRouterProperties polarisNearByRouterProperties,
+			List<RouterResponseInterceptor> responseInterceptors) {
-			PolarisMetadataRouterProperties polarisMetadataRouterProperties,
-			PolarisRuleBasedRouterProperties polarisRuleBasedRouterProperties) {
 		super(delegate);
 		this.routerAPI = routerAPI;
-		this.polarisNearByRouterProperties = polarisNearByRouterProperties;
+		this.requestInterceptors = requestInterceptors;
-		this.polarisMetadataRouterProperties = polarisMetadataRouterProperties;
+		this.responseInterceptors = responseInterceptors;
-		this.polarisRuleBasedRouterProperties = polarisRuleBasedRouterProperties;
 	}
 
 	@Override
@@ -125,33 +115,37 @@ public class PolarisRouterServiceInstanceListSupplier extends DelegatingServiceI
 
 		PolarisRouterContext routerContext = new PolarisRouterContext();
 
-		routerContext.setLabels(PolarisRouterContext.TRANSITIVE_LABELS, MetadataContextHolder.get()
+		routerContext.putLabels(PolarisRouterContext.TRANSITIVE_LABELS, MetadataContextHolder.get()
 				.getFragmentContext(MetadataContext.FRAGMENT_TRANSITIVE));
 
-		labelHeaderValues.forEach(labelHeaderValue -> {
+		Map<String, String> labelHeaderValuesMap = new HashMap<>();
 		try {
-				Map<String, String> labels = JacksonUtils.deserialize2Map(URLDecoder.decode(labelHeaderValue, "UTF-8"));
+			String labelHeaderValuesContent = labelHeaderValues.stream().findFirst().get();
-				if (!CollectionUtils.isEmpty(labels)) {
+			labelHeaderValuesMap.putAll(JacksonUtils.deserialize2Map(URLDecoder.decode(labelHeaderValuesContent, UTF_8)));
-					routerContext.setLabels(PolarisRouterContext.RULE_ROUTER_LABELS, labels);
-				}
 		}
 		catch (UnsupportedEncodingException e) {
-				LOGGER.error("Decode header[{}] failed.", labelHeaderValue, e);
+			throw new RuntimeException("unsupported charset exception " + UTF_8);
-				throw new RuntimeException(e);
 		}
-		});
+		routerContext.putLabels(PolarisRouterContext.ROUTER_LABELS, labelHeaderValuesMap);
-
 		return routerContext;
 	}
 
-	Flux<List<ServiceInstance>> doRouter(Flux<List<ServiceInstance>> allServers, PolarisRouterContext key) {
+	Flux<List<ServiceInstance>> doRouter(Flux<List<ServiceInstance>> allServers, PolarisRouterContext routerContext) {
 		ServiceInstances serviceInstances = LoadBalancerUtils.transferServersToServiceInstances(allServers);
 
 		// filter instance by routers
-		ProcessRoutersRequest processRoutersRequest = buildProcessRoutersRequest(serviceInstances, key);
+		ProcessRoutersRequest processRoutersRequest = buildProcessRoutersRequest(serviceInstances, routerContext);
+
+		// process request interceptors
+		processRouterRequestInterceptors(processRoutersRequest, routerContext);
 
+		// process router chain
 		ProcessRoutersResponse processRoutersResponse = routerAPI.processRouters(processRoutersRequest);
 
+		// process response interceptors
+		processRouterResponseInterceptors(routerContext, processRoutersResponse);
+
+		// transfer polaris server to ServiceInstance
 		List<ServiceInstance> filteredInstances = new ArrayList<>();
 		ServiceInstances filteredServiceInstances = processRoutersResponse.getServiceInstances();
 		for (Instance instance : filteredServiceInstances.getInstances()) {
@@ -163,42 +157,25 @@ public class PolarisRouterServiceInstanceListSupplier extends DelegatingServiceI
 	ProcessRoutersRequest buildProcessRoutersRequest(ServiceInstances serviceInstances, PolarisRouterContext key) {
 		ProcessRoutersRequest processRoutersRequest = new ProcessRoutersRequest();
 		processRoutersRequest.setDstInstances(serviceInstances);
-
-		// metadata router
-		if (polarisMetadataRouterProperties.isEnabled()) {
-			Map<String, String> transitiveLabels = getRouterLabels(key, PolarisRouterContext.TRANSITIVE_LABELS);
-			processRoutersRequest.putRouterMetadata(MetadataRouter.ROUTER_TYPE_METADATA, transitiveLabels);
-		}
-
-		// nearby router
-		if (polarisNearByRouterProperties.isEnabled()) {
-			Map<String, String> nearbyRouterMetadata = new HashMap<>();
-			nearbyRouterMetadata.put(NearbyRouter.ROUTER_ENABLED, "true");
-			processRoutersRequest.putRouterMetadata(NearbyRouter.ROUTER_TYPE_NEAR_BY, nearbyRouterMetadata);
-		}
-
-		// rule based router
-		// set dynamic switch for rule based router
-		boolean ruleBasedRouterEnabled = polarisRuleBasedRouterProperties.isEnabled();
-		Map<String, String> ruleRouterMetadata = new HashMap<>();
-		ruleRouterMetadata.put(RuleBasedRouter.ROUTER_ENABLED, String.valueOf(ruleBasedRouterEnabled));
-		processRoutersRequest.putRouterMetadata(RuleBasedRouter.ROUTER_TYPE_RULE_BASED, ruleRouterMetadata);
-
 		ServiceInfo serviceInfo = new ServiceInfo();
 		serviceInfo.setNamespace(MetadataContext.LOCAL_NAMESPACE);
 		serviceInfo.setService(MetadataContext.LOCAL_SERVICE);
-
+		processRoutersRequest.setSourceService(serviceInfo);
-		if (ruleBasedRouterEnabled) {
+		return processRoutersRequest;
-			Map<String, String> ruleRouterLabels = getRouterLabels(key, PolarisRouterContext.RULE_ROUTER_LABELS);
-			// The label information that the rule based routing depends on
-			// is placed in the metadata of the source service for transmission.
-			// Later, can consider putting it in routerMetadata like other routers.
-			serviceInfo.setMetadata(ruleRouterLabels);
 	}
 
-		processRoutersRequest.setSourceService(serviceInfo);
+	void processRouterRequestInterceptors(ProcessRoutersRequest processRoutersRequest, PolarisRouterContext routerContext) {
+		for (RouterRequestInterceptor requestInterceptor : requestInterceptors) {
+			requestInterceptor.apply(processRoutersRequest, routerContext);
+		}
+	}
 
-		return processRoutersRequest;
+	private void processRouterResponseInterceptors(PolarisRouterContext routerContext, ProcessRoutersResponse processRoutersResponse) {
+		if (!CollectionUtils.isEmpty(responseInterceptors)) {
+			for (RouterResponseInterceptor responseInterceptor : responseInterceptors) {
+				responseInterceptor.apply(processRoutersResponse, routerContext);
+			}
+		}
 	}
 
 	private Map<String, String> getRouterLabels(PolarisRouterContext key, String type) {

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/RouterRuleLabelResolver.java

@@ -24,7 +24,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
-import com.tencent.cloud.common.util.ExpressionLabelUtils;
+import com.tencent.cloud.common.util.expresstion.ExpressionLabelUtils;
 import com.tencent.cloud.polaris.context.ServiceRuleManager;
 import com.tencent.polaris.client.pb.ModelProto;
 import com.tencent.polaris.client.pb.RoutingProto;

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/beanprocessor/LoadBalancerInterceptorBeanPostProcessor.java

@@ -13,16 +13,16 @@
  * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
  * CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
- *
  */
 
-package com.tencent.cloud.polaris.router.resttemplate;
+package com.tencent.cloud.polaris.router.beanprocessor;
 
 import java.util.List;
 
-import com.tencent.cloud.common.metadata.config.MetadataLocalProperties;
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
 import com.tencent.cloud.common.util.BeanFactoryUtils;
 import com.tencent.cloud.polaris.router.RouterRuleLabelResolver;
+import com.tencent.cloud.polaris.router.resttemplate.PolarisLoadBalancerInterceptor;
 import com.tencent.cloud.polaris.router.spi.SpringWebRouterLabelResolver;
 
 import org.springframework.beans.BeansException;
@@ -39,7 +39,7 @@ import org.springframework.cloud.client.loadbalancer.LoadBalancerRequestFactory;
  *
  *@author lepdou 2022-05-18
  */
-public class PolarisLoadBalancerBeanPostProcessor implements BeanPostProcessor, BeanFactoryAware {
+public class LoadBalancerInterceptorBeanPostProcessor implements BeanPostProcessor, BeanFactoryAware {
 
 	private BeanFactory factory;
 
@@ -54,11 +54,11 @@ public class PolarisLoadBalancerBeanPostProcessor implements BeanPostProcessor,
 			LoadBalancerRequestFactory requestFactory = this.factory.getBean(LoadBalancerRequestFactory.class);
 			LoadBalancerClient loadBalancerClient = this.factory.getBean(LoadBalancerClient.class);
 			List<SpringWebRouterLabelResolver> routerLabelResolvers = BeanFactoryUtils.getBeans(factory, SpringWebRouterLabelResolver.class);
-			MetadataLocalProperties metadataLocalProperties = this.factory.getBean(MetadataLocalProperties.class);
+			StaticMetadataManager staticMetadataManager = this.factory.getBean(StaticMetadataManager.class);
 			RouterRuleLabelResolver routerRuleLabelResolver = this.factory.getBean(RouterRuleLabelResolver.class);
 
 			return new PolarisLoadBalancerInterceptor(loadBalancerClient, requestFactory,
-					routerLabelResolvers, metadataLocalProperties, routerRuleLabelResolver);
+					routerLabelResolvers, staticMetadataManager, routerRuleLabelResolver);
 		}
 		return bean;
 	}

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/beanprocessor/ReactiveLoadBalancerClientFilterBeanPostProcessor.java

@@ -13,16 +13,16 @@
  * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
  * CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
- *
  */
 
-package com.tencent.cloud.polaris.router.scg;
+package com.tencent.cloud.polaris.router.beanprocessor;
 
 import java.util.List;
 
-import com.tencent.cloud.common.metadata.config.MetadataLocalProperties;
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
 import com.tencent.cloud.common.util.BeanFactoryUtils;
 import com.tencent.cloud.polaris.router.RouterRuleLabelResolver;
+import com.tencent.cloud.polaris.router.scg.PolarisReactiveLoadBalancerClientFilter;
 import com.tencent.cloud.polaris.router.spi.SpringWebRouterLabelResolver;
 
 import org.springframework.beans.BeansException;
@@ -38,7 +38,7 @@ import org.springframework.cloud.loadbalancer.support.LoadBalancerClientFactory;
  * Replaced ReactiveLoadBalancerClientFilter with PolarisReactiveLoadBalancerClientFilter during creating bean phase.
  *@author lepdou 2022-06-20
  */
-public class PolarisLoadBalancerClientBeanPostProcessor implements BeanPostProcessor, BeanFactoryAware {
+public class ReactiveLoadBalancerClientFilterBeanPostProcessor implements BeanPostProcessor, BeanFactoryAware {
 
 	private BeanFactory factory;
 
@@ -50,18 +50,19 @@ public class PolarisLoadBalancerClientBeanPostProcessor implements BeanPostProce
 	@Override
 	public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
 		// Support spring cloud gateway router.
-		// Replaces the default LoadBalancerClientFilter implementation and returns a custom PolarisLoadBalancerClientFilter
+		// Replaces the default ReactiveLoadBalancerClientFilter implementation
+		// and returns a custom PolarisReactiveLoadBalancerClientFilter
 		if (bean instanceof ReactiveLoadBalancerClientFilter) {
 			LoadBalancerClientFactory loadBalancerClientFactory = this.factory.getBean(LoadBalancerClientFactory.class);
 			GatewayLoadBalancerProperties gatewayLoadBalancerProperties = this.factory.getBean(GatewayLoadBalancerProperties.class);
 			LoadBalancerProperties loadBalancerProperties = this.factory.getBean(LoadBalancerProperties.class);
 			List<SpringWebRouterLabelResolver> routerLabelResolvers = BeanFactoryUtils.getBeans(factory, SpringWebRouterLabelResolver.class);
-			MetadataLocalProperties metadataLocalProperties = this.factory.getBean(MetadataLocalProperties.class);
+			StaticMetadataManager staticMetadataManager = this.factory.getBean(StaticMetadataManager.class);
 			RouterRuleLabelResolver routerRuleLabelResolver = this.factory.getBean(RouterRuleLabelResolver.class);
 
 			return new PolarisReactiveLoadBalancerClientFilter(
 					loadBalancerClientFactory, gatewayLoadBalancerProperties, loadBalancerProperties,
-					metadataLocalProperties, routerRuleLabelResolver, routerLabelResolvers);
+					staticMetadataManager, routerRuleLabelResolver, routerLabelResolvers);
 		}
 		return bean;
 	}

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/config/FeignAutoConfiguration.java

@@ -20,7 +20,7 @@ package com.tencent.cloud.polaris.router.config;
 
 import java.util.List;
 
-import com.tencent.cloud.common.metadata.config.MetadataLocalProperties;
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
 import com.tencent.cloud.polaris.router.RouterRuleLabelResolver;
 import com.tencent.cloud.polaris.router.feign.RouterLabelFeignInterceptor;
 import com.tencent.cloud.polaris.router.spi.FeignRouterLabelResolver;
@@ -40,8 +40,8 @@ public class FeignAutoConfiguration {
 
 	@Bean
 	public RouterLabelFeignInterceptor routerLabelInterceptor(@Nullable List<FeignRouterLabelResolver> routerLabelResolvers,
-			MetadataLocalProperties metadataLocalProperties,
+			StaticMetadataManager staticMetadataManager,
 			RouterRuleLabelResolver routerRuleLabelResolver) {
-		return new RouterLabelFeignInterceptor(routerLabelResolvers, metadataLocalProperties, routerRuleLabelResolver);
+		return new RouterLabelFeignInterceptor(routerLabelResolvers, staticMetadataManager, routerRuleLabelResolver);
 	}
 }

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/config/LoadBalancerConfiguration.java

@@ -18,7 +18,11 @@
 
 package com.tencent.cloud.polaris.router.config;
 
+import java.util.List;
+
 import com.tencent.cloud.polaris.router.PolarisRouterServiceInstanceListSupplier;
+import com.tencent.cloud.polaris.router.spi.RouterRequestInterceptor;
+import com.tencent.cloud.polaris.router.spi.RouterResponseInterceptor;
 import com.tencent.polaris.router.api.core.RouterAPI;
 
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
@@ -55,16 +59,13 @@ public class LoadBalancerConfiguration {
 		@ConditionalOnBean(ReactiveDiscoveryClient.class)
 		public ServiceInstanceListSupplier polarisRouterDiscoveryClientServiceInstanceListSupplier(
 				ConfigurableApplicationContext context,
-				RouterAPI routerAPI,
+				RouterAPI routerAPI, List<RouterRequestInterceptor> requestInterceptors,
-				PolarisNearByRouterProperties polarisNearByRouterProperties,
+				List<RouterResponseInterceptor> responseInterceptors) {
-				PolarisMetadataRouterProperties polarisMetadataRouterProperties,
-				PolarisRuleBasedRouterProperties polarisRuleBasedRouterProperties) {
 			return new PolarisRouterServiceInstanceListSupplier(
 					ServiceInstanceListSupplier.builder().withDiscoveryClient().build(context),
 					routerAPI,
-					polarisNearByRouterProperties,
+					requestInterceptors,
-					polarisMetadataRouterProperties,
+					responseInterceptors);
-					polarisRuleBasedRouterProperties);
 		}
 
 	}
@@ -78,16 +79,13 @@ public class LoadBalancerConfiguration {
 		@ConditionalOnBean(DiscoveryClient.class)
 		public ServiceInstanceListSupplier polarisRouterDiscoveryClientServiceInstanceListSupplier(
 				ConfigurableApplicationContext context,
-				RouterAPI routerAPI,
+				RouterAPI routerAPI, List<RouterRequestInterceptor> requestInterceptors,
-				PolarisNearByRouterProperties polarisNearByRouterProperties,
+				List<RouterResponseInterceptor> responseInterceptors) {
-				PolarisMetadataRouterProperties polarisMetadataRouterProperties,
-				PolarisRuleBasedRouterProperties polarisRuleBasedRouterProperties) {
 			return new PolarisRouterServiceInstanceListSupplier(
 					ServiceInstanceListSupplier.builder().withBlockingDiscoveryClient().build(context),
 					routerAPI,
-					polarisNearByRouterProperties,
+					requestInterceptors,
-					polarisMetadataRouterProperties,
+					responseInterceptors);
-					polarisRuleBasedRouterProperties);
 		}
 	}
 }

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/config/RouterAutoConfiguration.java

@@ -20,10 +20,17 @@ package com.tencent.cloud.polaris.router.config;
 
 import com.tencent.cloud.polaris.context.ServiceRuleManager;
 import com.tencent.cloud.polaris.router.RouterRuleLabelResolver;
-import com.tencent.cloud.polaris.router.resttemplate.PolarisLoadBalancerBeanPostProcessor;
+import com.tencent.cloud.polaris.router.beanprocessor.LoadBalancerInterceptorBeanPostProcessor;
-import com.tencent.cloud.polaris.router.scg.PolarisLoadBalancerClientBeanPostProcessor;
+import com.tencent.cloud.polaris.router.beanprocessor.ReactiveLoadBalancerClientFilterBeanPostProcessor;
+import com.tencent.cloud.polaris.router.config.properties.PolarisMetadataRouterProperties;
+import com.tencent.cloud.polaris.router.config.properties.PolarisNearByRouterProperties;
+import com.tencent.cloud.polaris.router.config.properties.PolarisRuleBasedRouterProperties;
+import com.tencent.cloud.polaris.router.interceptor.MetadataRouterRequestInterceptor;
+import com.tencent.cloud.polaris.router.interceptor.NearbyRouterRequestInterceptor;
+import com.tencent.cloud.polaris.router.interceptor.RuleBasedRouterRequestInterceptor;
 
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClients;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -33,7 +40,7 @@ import org.springframework.core.annotation.Order;
 import static org.springframework.core.Ordered.HIGHEST_PRECEDENCE;
 
 /**
- * router module auto configuration.
+ * configuration for router module singleton beans.
  *
  *@author lepdou 2022-05-11
  */
@@ -45,19 +52,37 @@ public class RouterAutoConfiguration {
 	@Bean
 	@Order(HIGHEST_PRECEDENCE)
 	@ConditionalOnClass(name = "org.springframework.cloud.client.loadbalancer.LoadBalancerInterceptor")
-	public PolarisLoadBalancerBeanPostProcessor polarisLoadBalancerBeanPostProcessor() {
+	public LoadBalancerInterceptorBeanPostProcessor loadBalancerInterceptorBeanPostProcessor() {
-		return new PolarisLoadBalancerBeanPostProcessor();
+		return new LoadBalancerInterceptorBeanPostProcessor();
 	}
 
 	@Bean
 	@Order(HIGHEST_PRECEDENCE)
 	@ConditionalOnClass(name = "org.springframework.cloud.gateway.filter.ReactiveLoadBalancerClientFilter")
-	public PolarisLoadBalancerClientBeanPostProcessor polarisLoadBalancerClientBeanPostProcessor() {
+	public ReactiveLoadBalancerClientFilterBeanPostProcessor loadBalancerClientFilterBeanPostProcessor() {
-		return new PolarisLoadBalancerClientBeanPostProcessor();
+		return new ReactiveLoadBalancerClientFilterBeanPostProcessor();
 	}
 
 	@Bean
 	public RouterRuleLabelResolver routerRuleLabelResolver(ServiceRuleManager serviceRuleManager) {
 		return new RouterRuleLabelResolver(serviceRuleManager);
 	}
+
+	@Bean
+	@ConditionalOnProperty(value = "spring.cloud.polaris.router.metadata-router.enabled", matchIfMissing = true)
+	public MetadataRouterRequestInterceptor metadataRouterRequestInterceptor(PolarisMetadataRouterProperties polarisMetadataRouterProperties) {
+		return new MetadataRouterRequestInterceptor(polarisMetadataRouterProperties);
+	}
+
+	@Bean
+	@ConditionalOnProperty(value = "spring.cloud.polaris.router.nearby-router.enabled", matchIfMissing = true)
+	public NearbyRouterRequestInterceptor nearbyRouterRequestInterceptor(PolarisNearByRouterProperties polarisNearByRouterProperties) {
+		return new NearbyRouterRequestInterceptor(polarisNearByRouterProperties);
+	}
+
+	@Bean
+	@ConditionalOnProperty(value = "spring.cloud.polaris.router.rule-router.enabled", matchIfMissing = true)
+	public RuleBasedRouterRequestInterceptor ruleBasedRouterRequestInterceptor(PolarisRuleBasedRouterProperties polarisRuleBasedRouterProperties) {
+		return new RuleBasedRouterRequestInterceptor(polarisRuleBasedRouterProperties);
+	}
 }

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/config/properties/PolarisMetadataRouterProperties.java

@@ -13,10 +13,9 @@
  * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
  * CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
- *
  */
 
-package com.tencent.cloud.polaris.router.config;
+package com.tencent.cloud.polaris.router.config.properties;
 
 import org.springframework.boot.context.properties.ConfigurationProperties;
 

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/config/properties/PolarisNearByRouterProperties.java

@@ -13,10 +13,9 @@
  * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
  * CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
- *
  */
 
-package com.tencent.cloud.polaris.router.config;
+package com.tencent.cloud.polaris.router.config.properties;
 
 import org.springframework.boot.context.properties.ConfigurationProperties;
 

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/config/properties/PolarisRuleBasedRouterProperties.java

@@ -13,10 +13,9 @@
  * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
  * CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
- *
  */
 
-package com.tencent.cloud.polaris.router.config;
+package com.tencent.cloud.polaris.router.config.properties;
 
 import org.springframework.boot.context.properties.ConfigurationProperties;
 

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/feign/FeignExpressionLabelUtils.java

@@ -25,7 +25,7 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
 
-import com.tencent.cloud.common.util.ExpressionLabelUtils;
+import com.tencent.cloud.common.util.expresstion.ExpressionLabelUtils;
 import feign.RequestTemplate;
 import org.apache.commons.lang.StringUtils;
 

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/feign/RouterLabelFeignInterceptor.java

@@ -29,7 +29,7 @@ import java.util.Set;
 
 import com.tencent.cloud.common.metadata.MetadataContext;
 import com.tencent.cloud.common.metadata.MetadataContextHolder;
-import com.tencent.cloud.common.metadata.config.MetadataLocalProperties;
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
 import com.tencent.cloud.common.util.JacksonUtils;
 import com.tencent.cloud.polaris.router.RouterConstants;
 import com.tencent.cloud.polaris.router.RouterRuleLabelResolver;
@@ -42,6 +42,8 @@ import org.slf4j.LoggerFactory;
 import org.springframework.core.Ordered;
 import org.springframework.util.CollectionUtils;
 
+import static com.tencent.cloud.common.constant.ContextConstant.UTF_8;
+
 /**
  * Resolver labels from request.
  *
@@ -51,11 +53,11 @@ public class RouterLabelFeignInterceptor implements RequestInterceptor, Ordered
 	private static final Logger LOGGER = LoggerFactory.getLogger(RouterLabelFeignInterceptor.class);
 
 	private final List<FeignRouterLabelResolver> routerLabelResolvers;
-	private final MetadataLocalProperties metadataLocalProperties;
+	private final StaticMetadataManager staticMetadataManager;
 	private final RouterRuleLabelResolver routerRuleLabelResolver;
 
 	public RouterLabelFeignInterceptor(List<FeignRouterLabelResolver> routerLabelResolvers,
-			MetadataLocalProperties metadataLocalProperties,
+			StaticMetadataManager staticMetadataManager,
 			RouterRuleLabelResolver routerRuleLabelResolver) {
 		if (!CollectionUtils.isEmpty(routerLabelResolvers)) {
 			routerLabelResolvers.sort(Comparator.comparingInt(Ordered::getOrder));
@@ -64,7 +66,7 @@ public class RouterLabelFeignInterceptor implements RequestInterceptor, Ordered
 		else {
 			this.routerLabelResolvers = null;
 		}
-		this.metadataLocalProperties = metadataLocalProperties;
+		this.staticMetadataManager = staticMetadataManager;
 		this.routerRuleLabelResolver = routerRuleLabelResolver;
 	}
 
@@ -76,7 +78,7 @@ public class RouterLabelFeignInterceptor implements RequestInterceptor, Ordered
 	@Override
 	public void apply(RequestTemplate requestTemplate) {
 		// local service labels
-		Map<String, String> labels = new HashMap<>(metadataLocalProperties.getContent());
+		Map<String, String> labels = new HashMap<>(staticMetadataManager.getMergedStaticMetadata());
 
 		// labels from rule expression
 		String peerServiceName = requestTemplate.feignTarget().name();
@@ -107,18 +109,14 @@ public class RouterLabelFeignInterceptor implements RequestInterceptor, Ordered
 		labels.putAll(transitiveLabels);
 
 		// pass label by header
-		if (labels.size() == 0) {
+		String encodedLabelsContent;
-			requestTemplate.header(RouterConstants.ROUTER_LABEL_HEADER);
-			return;
-		}
 		try {
-			String headerMetadataStr = URLEncoder.encode(JacksonUtils.serialize2Json(labels), "UTF-8");
+			encodedLabelsContent = URLEncoder.encode(JacksonUtils.serialize2Json(labels), UTF_8);
-			requestTemplate.header(RouterConstants.ROUTER_LABEL_HEADER, headerMetadataStr);
 		}
 		catch (UnsupportedEncodingException e) {
-			LOGGER.error("Set header failed.", e);
+			throw new RuntimeException("unsupported charset exception " + UTF_8);
-			throw new RuntimeException(e);
 		}
+		requestTemplate.header(RouterConstants.ROUTER_LABEL_HEADER, encodedLabelsContent);
 	}
 
 	private Map<String, String> getRuleExpressionLabels(RequestTemplate requestTemplate, Set<String> labelKeys) {
@@ -128,5 +126,4 @@ public class RouterLabelFeignInterceptor implements RequestInterceptor, Ordered
 
 		return FeignExpressionLabelUtils.resolve(requestTemplate, labelKeys);
 	}
-
 }

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/interceptor/MetadataRouterRequestInterceptor.java

@@ -0,0 +1,57 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.interceptor;
+
+import java.util.Map;
+import java.util.Set;
+
+import com.tencent.cloud.polaris.router.PolarisRouterContext;
+import com.tencent.cloud.polaris.router.config.properties.PolarisMetadataRouterProperties;
+import com.tencent.cloud.polaris.router.spi.RouterRequestInterceptor;
+import com.tencent.polaris.plugins.router.metadata.MetadataRouter;
+import com.tencent.polaris.router.api.rpc.ProcessRoutersRequest;
+
+/**
+ * Router request interceptor for metadata router.
+ * @author lepdou 2022-07-06
+ */
+public class MetadataRouterRequestInterceptor implements RouterRequestInterceptor {
+	private static final String LABEL_KEY_METADATA_ROUTER_KEYS = "system-metadata-router-keys";
+
+	private final PolarisMetadataRouterProperties polarisMetadataRouterProperties;
+
+	public MetadataRouterRequestInterceptor(PolarisMetadataRouterProperties polarisMetadataRouterProperties) {
+		this.polarisMetadataRouterProperties = polarisMetadataRouterProperties;
+	}
+
+	@Override
+	public void apply(ProcessRoutersRequest request, PolarisRouterContext routerContext) {
+		if (!polarisMetadataRouterProperties.isEnabled()) {
+			return;
+		}
+
+		// 1. get metadata router label keys
+		Set<String> metadataRouterKeys = routerContext.getLabelAsSet(LABEL_KEY_METADATA_ROUTER_KEYS);
+		// 2. get metadata router labels
+		Map<String, String> metadataRouterLabels = routerContext.getLabels(PolarisRouterContext.ROUTER_LABELS,
+				metadataRouterKeys);
+		// 3. set metadata router labels to request
+		request.addRouterMetadata(MetadataRouter.ROUTER_TYPE_METADATA, metadataRouterLabels);
+	}
+}

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/interceptor/NearbyRouterRequestInterceptor.java

@@ -0,0 +1,53 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.interceptor;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import com.tencent.cloud.polaris.router.PolarisRouterContext;
+import com.tencent.cloud.polaris.router.config.properties.PolarisNearByRouterProperties;
+import com.tencent.cloud.polaris.router.spi.RouterRequestInterceptor;
+import com.tencent.polaris.plugins.router.nearby.NearbyRouter;
+import com.tencent.polaris.router.api.rpc.ProcessRoutersRequest;
+
+/**
+ * Router request interceptor for nearby router.
+ * @author lepdou 2022-07-06
+ */
+public class NearbyRouterRequestInterceptor implements RouterRequestInterceptor {
+
+	private final PolarisNearByRouterProperties polarisNearByRouterProperties;
+
+	public NearbyRouterRequestInterceptor(PolarisNearByRouterProperties polarisNearByRouterProperties) {
+		this.polarisNearByRouterProperties = polarisNearByRouterProperties;
+	}
+
+	@Override
+	public void apply(ProcessRoutersRequest request, PolarisRouterContext routerContext) {
+		if (!polarisNearByRouterProperties.isEnabled()) {
+			return;
+		}
+
+		Map<String, String> nearbyRouterMetadata = new HashMap<>();
+		nearbyRouterMetadata.put(NearbyRouter.ROUTER_ENABLED, "true");
+
+		request.addRouterMetadata(NearbyRouter.ROUTER_TYPE_NEAR_BY, nearbyRouterMetadata);
+	}
+}

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/interceptor/RuleBasedRouterRequestInterceptor.java

@@ -0,0 +1,59 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.interceptor;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import com.tencent.cloud.polaris.router.PolarisRouterContext;
+import com.tencent.cloud.polaris.router.config.properties.PolarisRuleBasedRouterProperties;
+import com.tencent.cloud.polaris.router.spi.RouterRequestInterceptor;
+import com.tencent.polaris.plugins.router.rule.RuleBasedRouter;
+import com.tencent.polaris.router.api.rpc.ProcessRoutersRequest;
+
+/**
+ * Router request interceptor for rule based router.
+ * @author lepdou 2022-07-06
+ */
+public class RuleBasedRouterRequestInterceptor implements RouterRequestInterceptor {
+
+	private final PolarisRuleBasedRouterProperties polarisRuleBasedRouterProperties;
+
+	public RuleBasedRouterRequestInterceptor(PolarisRuleBasedRouterProperties polarisRuleBasedRouterProperties) {
+		this.polarisRuleBasedRouterProperties = polarisRuleBasedRouterProperties;
+	}
+
+	@Override
+	public void apply(ProcessRoutersRequest request, PolarisRouterContext routerContext) {
+		boolean ruleBasedRouterEnabled = polarisRuleBasedRouterProperties.isEnabled();
+
+		// set dynamic switch for rule based router
+		Map<String, String> metadata = new HashMap<>();
+		metadata.put(RuleBasedRouter.ROUTER_ENABLED, String.valueOf(ruleBasedRouterEnabled));
+		request.addRouterMetadata(RuleBasedRouter.ROUTER_TYPE_RULE_BASED, metadata);
+
+		// The label information that the rule based routing depends on
+		// is placed in the metadata of the source service for transmission.
+		// Later, can consider putting it in routerMetadata like other routers.
+		if (ruleBasedRouterEnabled) {
+			Map<String, String> ruleRouterLabels = routerContext.getLabels(PolarisRouterContext.ROUTER_LABELS);
+			request.getSourceService().setMetadata(ruleRouterLabels);
+		}
+	}
+}

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/resttemplate/PolarisLoadBalancerInterceptor.java

@@ -31,9 +31,9 @@ import java.util.Set;
 
 import com.tencent.cloud.common.metadata.MetadataContext;
 import com.tencent.cloud.common.metadata.MetadataContextHolder;
-import com.tencent.cloud.common.metadata.config.MetadataLocalProperties;
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
-import com.tencent.cloud.common.util.ExpressionLabelUtils;
 import com.tencent.cloud.common.util.JacksonUtils;
+import com.tencent.cloud.common.util.expresstion.SpringWebExpressionLabelUtils;
 import com.tencent.cloud.polaris.router.RouterConstants;
 import com.tencent.cloud.polaris.router.RouterRuleLabelResolver;
 import com.tencent.cloud.polaris.router.spi.SpringWebRouterLabelResolver;
@@ -62,18 +62,18 @@ public class PolarisLoadBalancerInterceptor extends LoadBalancerInterceptor {
 	private final LoadBalancerClient loadBalancer;
 	private final LoadBalancerRequestFactory requestFactory;
 	private final List<SpringWebRouterLabelResolver> routerLabelResolvers;
-	private final MetadataLocalProperties metadataLocalProperties;
+	private final StaticMetadataManager staticMetadataManager;
 	private final RouterRuleLabelResolver routerRuleLabelResolver;
 
 	public PolarisLoadBalancerInterceptor(LoadBalancerClient loadBalancer,
 			LoadBalancerRequestFactory requestFactory,
 			List<SpringWebRouterLabelResolver> routerLabelResolvers,
-			MetadataLocalProperties metadataLocalProperties,
+			StaticMetadataManager staticMetadataManager,
 			RouterRuleLabelResolver routerRuleLabelResolver) {
 		super(loadBalancer, requestFactory);
 		this.loadBalancer = loadBalancer;
 		this.requestFactory = requestFactory;
-		this.metadataLocalProperties = metadataLocalProperties;
+		this.staticMetadataManager = staticMetadataManager;
 		this.routerRuleLabelResolver = routerRuleLabelResolver;
 
 		if (!CollectionUtils.isEmpty(routerLabelResolvers)) {
@@ -100,7 +100,7 @@ public class PolarisLoadBalancerInterceptor extends LoadBalancerInterceptor {
 
 	void setLabelsToHeaders(HttpRequest request, byte[] body, String peerServiceName) {
 		// local service labels
-		Map<String, String> labels = new HashMap<>(metadataLocalProperties.getContent());
+		Map<String, String> labels = new HashMap<>(staticMetadataManager.getMergedStaticMetadata());
 
 		// labels from rule expression
 		Set<String> expressionLabelKeys = routerRuleLabelResolver.getExpressionLabelKeys(MetadataContext.LOCAL_NAMESPACE,
@@ -151,6 +151,6 @@ public class PolarisLoadBalancerInterceptor extends LoadBalancerInterceptor {
 			return Collections.emptyMap();
 		}
 
-		return ExpressionLabelUtils.resolve(request, labelKeys);
+		return SpringWebExpressionLabelUtils.resolve(request, labelKeys);
 	}
 }

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/scg/PolarisReactiveLoadBalancerClientFilter.java

@@ -29,9 +29,10 @@ import java.util.Set;
 
 import com.tencent.cloud.common.metadata.MetadataContext;
 import com.tencent.cloud.common.metadata.MetadataContextHolder;
-import com.tencent.cloud.common.metadata.config.MetadataLocalProperties;
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
-import com.tencent.cloud.common.util.ExpressionLabelUtils;
 import com.tencent.cloud.common.util.JacksonUtils;
+import com.tencent.cloud.common.util.expresstion.SpringWebExpressionLabelUtils;
+import com.tencent.cloud.polaris.router.PolarisRouterServiceInstanceListSupplier;
 import com.tencent.cloud.polaris.router.RouterConstants;
 import com.tencent.cloud.polaris.router.RouterRuleLabelResolver;
 import com.tencent.cloud.polaris.router.spi.SpringWebRouterLabelResolver;
@@ -71,24 +72,26 @@ import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.G
 import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.addOriginalRequestUrl;
 
 /**
- * ReactiveLoadBalancerClientFilter does not have the ability to pass route labels, so it is replaced with PolarisReactiveLoadBalancerClientFilter.
+ * ReactiveLoadBalancerClientFilter does not have the ability to pass route labels, so it is replaced
- * The passed route labels are used in {@link com.tencent.cloud.polaris.router.PolarisRouterServiceInstanceListSupplier}.
+ * with PolarisReactiveLoadBalancerClientFilter. The passed route labels are used in
+ * {@link PolarisRouterServiceInstanceListSupplier}.
+ *
  * @author lepdou 2022-06-20
  */
 public class PolarisReactiveLoadBalancerClientFilter extends ReactiveLoadBalancerClientFilter {
-	private static final Logger LOGGER = LoggerFactory.getLogger(PolarisReactiveLoadBalancerClientFilter.class);
+	private static final Logger log = LoggerFactory.getLogger(PolarisReactiveLoadBalancerClientFilter.class);
 
 	private final LoadBalancerClientFactory clientFactory;
 	private final GatewayLoadBalancerProperties gatewayLoadBalancerProperties;
 	private final LoadBalancerProperties loadBalancerProperties;
-	private final MetadataLocalProperties metadataLocalProperties;
+	private final StaticMetadataManager staticMetadataManager;
 	private final RouterRuleLabelResolver routerRuleLabelResolver;
 	private final List<SpringWebRouterLabelResolver> routerLabelResolvers;
 
 	public PolarisReactiveLoadBalancerClientFilter(LoadBalancerClientFactory clientFactory,
 			GatewayLoadBalancerProperties gatewayLoadBalancerProperties,
 			LoadBalancerProperties loadBalancerProperties,
-			MetadataLocalProperties metadataLocalProperties,
+			StaticMetadataManager staticMetadataManager,
 			RouterRuleLabelResolver routerRuleLabelResolver,
 			List<SpringWebRouterLabelResolver> routerLabelResolvers) {
 		super(clientFactory, gatewayLoadBalancerProperties, loadBalancerProperties);
@@ -96,7 +99,7 @@ public class PolarisReactiveLoadBalancerClientFilter extends ReactiveLoadBalance
 		this.clientFactory = clientFactory;
 		this.gatewayLoadBalancerProperties = gatewayLoadBalancerProperties;
 		this.loadBalancerProperties = loadBalancerProperties;
-		this.metadataLocalProperties = metadataLocalProperties;
+		this.staticMetadataManager = staticMetadataManager;
 		this.routerRuleLabelResolver = routerRuleLabelResolver;
 		this.routerLabelResolvers = routerLabelResolvers;
 	}
@@ -114,8 +117,8 @@ public class PolarisReactiveLoadBalancerClientFilter extends ReactiveLoadBalance
 		// preserve the original url
 		addOriginalRequestUrl(exchange, url);
 
-		if (LOGGER.isTraceEnabled()) {
+		if (log.isTraceEnabled()) {
-			LOGGER.trace(ReactiveLoadBalancerClientFilter.class.getSimpleName() + " url before: " + url);
+			log.trace(ReactiveLoadBalancerClientFilter.class.getSimpleName() + " url before: " + url);
 		}
 
 		URI requestUri = exchange.getAttribute(GATEWAY_REQUEST_URL_ATTR);
@@ -158,8 +161,8 @@ public class PolarisReactiveLoadBalancerClientFilter extends ReactiveLoadBalance
 
 					URI requestUrl = reconstructURI(serviceInstance, uri);
 
-					if (LOGGER.isTraceEnabled()) {
+					if (log.isTraceEnabled()) {
-						LOGGER.trace("LoadBalancerClientFilter url chosen: " + requestUrl);
+						log.trace("LoadBalancerClientFilter url chosen: " + requestUrl);
 					}
 					exchange.getAttributes().put(GATEWAY_REQUEST_URL_ATTR, requestUrl);
 					exchange.getAttributes().put(GATEWAY_LOADBALANCER_RESPONSE_ATTR, response);
@@ -206,7 +209,7 @@ public class PolarisReactiveLoadBalancerClientFilter extends ReactiveLoadBalance
 		return headers;
 	}
 
-	String genRouterHint(ServerWebExchange exchange, String peerServiceName) {
+	private String genRouterHint(ServerWebExchange exchange, String peerServiceName) {
 		Map<String, String> routerLabels = genRouterLabels(exchange, peerServiceName);
 		String encodedLabelsContent;
 		try {
@@ -218,9 +221,9 @@ public class PolarisReactiveLoadBalancerClientFilter extends ReactiveLoadBalance
 		return encodedLabelsContent;
 	}
 
-	Map<String, String> genRouterLabels(ServerWebExchange exchange, String peerServiceName) {
+	private Map<String, String> genRouterLabels(ServerWebExchange exchange, String peerServiceName) {
 		// local service labels
-		Map<String, String> labels = new HashMap<>(metadataLocalProperties.getContent());
+		Map<String, String> labels = new HashMap<>(staticMetadataManager.getMergedStaticMetadata());
 
 		// labels from rule expression
 		Set<String> expressionLabelKeys = routerRuleLabelResolver.getExpressionLabelKeys(MetadataContext.LOCAL_NAMESPACE,
@@ -241,7 +244,7 @@ public class PolarisReactiveLoadBalancerClientFilter extends ReactiveLoadBalance
 					}
 				}
 				catch (Throwable t) {
-					LOGGER.error("[SCT][Router] revoke RouterLabelResolver occur some exception. ", t);
+					log.error("[SCT][Router] revoke RouterLabelResolver occur some exception. ", t);
 				}
 			});
 		}
@@ -259,6 +262,6 @@ public class PolarisReactiveLoadBalancerClientFilter extends ReactiveLoadBalance
 			return Collections.emptyMap();
 		}
 
-		return ExpressionLabelUtils.resolve(exchange, labelKeys);
+		return SpringWebExpressionLabelUtils.resolve(exchange, labelKeys);
 	}
 }

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/spi/RouterRequestInterceptor.java

@@ -0,0 +1,37 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.spi;
+
+import com.tencent.cloud.polaris.router.PolarisRouterContext;
+import com.tencent.polaris.router.api.rpc.ProcessRoutersRequest;
+
+/**
+ * The interceptor for router request. Router plugin can modify request by interceptor.
+ *
+ * @author lepdou 2022-07-11
+ */
+public interface RouterRequestInterceptor {
+
+	/**
+	 * processing request.
+	 * @param request the router request.
+	 * @param routerContext the router context.
+	 */
+	void apply(ProcessRoutersRequest request, PolarisRouterContext routerContext);
+}

spring-cloud-starter-tencent-polaris-router/src/main/java/com/tencent/cloud/polaris/router/spi/RouterResponseInterceptor.java

@@ -0,0 +1,38 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.spi;
+
+import com.tencent.cloud.polaris.router.PolarisRouterContext;
+import com.tencent.polaris.router.api.rpc.ProcessRoutersResponse;
+
+/**
+ * The interceptor for router response. Router plugin can modify router response by interceptor.
+ *
+ * @author lepdou 2022-07-11
+ */
+public interface RouterResponseInterceptor {
+
+	/**
+	 * processing router response.
+	 *
+	 * @param response the router response.
+	 * @param routerContext the router context.
+	 */
+	void apply(ProcessRoutersResponse response, PolarisRouterContext routerContext);
+}

spring-cloud-starter-tencent-polaris-router/src/test/java/com/tencent/cloud/polaris/router/PolarisRouterContextTest.java

@@ -20,7 +20,9 @@ package com.tencent.cloud.polaris.router;
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Set;
 
+import com.google.common.collect.Sets;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -38,27 +40,76 @@ public class PolarisRouterContextTest {
 		labels.put("k2", "v2");
 
 		PolarisRouterContext routerContext = new PolarisRouterContext();
-		routerContext.setLabels(PolarisRouterContext.RULE_ROUTER_LABELS, labels);
+		routerContext.putLabels(PolarisRouterContext.ROUTER_LABELS, labels);
 
 		Assert.assertEquals(0, routerContext.getLabels(PolarisRouterContext.TRANSITIVE_LABELS).size());
-		Assert.assertEquals(2, routerContext.getLabels(PolarisRouterContext.RULE_ROUTER_LABELS).size());
+		Assert.assertEquals(2, routerContext.getLabels(PolarisRouterContext.ROUTER_LABELS).size());
-		Assert.assertEquals("v1", routerContext.getLabels(PolarisRouterContext.RULE_ROUTER_LABELS).get("k1"));
+		Assert.assertEquals("v1", routerContext.getLabels(PolarisRouterContext.ROUTER_LABELS).get("k1"));
-		Assert.assertEquals("v2", routerContext.getLabels(PolarisRouterContext.RULE_ROUTER_LABELS).get("k2"));
+		Assert.assertEquals("v2", routerContext.getLabels(PolarisRouterContext.ROUTER_LABELS).get("k2"));
-		Assert.assertNull(routerContext.getLabels(PolarisRouterContext.RULE_ROUTER_LABELS).get("k3"));
+		Assert.assertNull(routerContext.getLabels(PolarisRouterContext.ROUTER_LABELS).get("k3"));
 	}
 
 	@Test
 	public void testSetNull() {
 		PolarisRouterContext routerContext = new PolarisRouterContext();
-		routerContext.setLabels(PolarisRouterContext.RULE_ROUTER_LABELS, null);
+		routerContext.putLabels(PolarisRouterContext.ROUTER_LABELS, null);
 		Assert.assertEquals(0, routerContext.getLabels(PolarisRouterContext.TRANSITIVE_LABELS).size());
-		Assert.assertEquals(0, routerContext.getLabels(PolarisRouterContext.RULE_ROUTER_LABELS).size());
+		Assert.assertEquals(0, routerContext.getLabels(PolarisRouterContext.ROUTER_LABELS).size());
 	}
 
 	@Test
 	public void testGetEmptyRouterContext() {
 		PolarisRouterContext routerContext = new PolarisRouterContext();
 		Assert.assertEquals(0, routerContext.getLabels(PolarisRouterContext.TRANSITIVE_LABELS).size());
-		Assert.assertEquals(0, routerContext.getLabels(PolarisRouterContext.RULE_ROUTER_LABELS).size());
+		Assert.assertEquals(0, routerContext.getLabels(PolarisRouterContext.ROUTER_LABELS).size());
+	}
+
+	@Test
+	public void testGetLabelByKeys() {
+		Map<String, String> labels = new HashMap<>();
+		labels.put("k1", "v1");
+		labels.put("k2", "v2");
+		labels.put("k3", "v3");
+
+		PolarisRouterContext routerContext = new PolarisRouterContext();
+		routerContext.putLabels(PolarisRouterContext.ROUTER_LABELS, labels);
+
+		Map<String, String> resolvedLabels = routerContext.getLabels(PolarisRouterContext.ROUTER_LABELS,
+				Sets.newHashSet("k1", "k2", "k4"));
+
+		Assert.assertEquals(2, resolvedLabels.size());
+		Assert.assertEquals("v1", resolvedLabels.get("k1"));
+		Assert.assertEquals("v2", resolvedLabels.get("k2"));
+	}
+
+	@Test
+	public void testGetLabel() {
+		Map<String, String> labels = new HashMap<>();
+		labels.put("k1", "v1");
+		labels.put("k2", "v2");
+		labels.put("k3", "v3");
+
+		PolarisRouterContext routerContext = new PolarisRouterContext();
+		routerContext.putLabels(PolarisRouterContext.ROUTER_LABELS, labels);
+
+		String resolvedLabel = routerContext.getLabel("k1");
+
+		Assert.assertEquals("v1", resolvedLabel);
+	}
+
+	@Test
+	public void testGetLabelAsSet() {
+		Map<String, String> labels = new HashMap<>();
+		labels.put("k1", "v1,v2,v3");
+
+		PolarisRouterContext routerContext = new PolarisRouterContext();
+		routerContext.putLabels(PolarisRouterContext.ROUTER_LABELS, labels);
+
+		Set<String> resolvedLabels = routerContext.getLabelAsSet("k1");
+
+		Assert.assertEquals(3, resolvedLabels.size());
+		Assert.assertTrue(resolvedLabels.contains("v1"));
+		Assert.assertTrue(resolvedLabels.contains("v2"));
+		Assert.assertTrue(resolvedLabels.contains("v3"));
 	}
 }

spring-cloud-starter-tencent-polaris-router/src/test/java/com/tencent/cloud/polaris/router/PolarisRouterServiceInstanceListSupplierTest.java

@@ -31,9 +31,13 @@ import com.tencent.cloud.common.metadata.MetadataContextHolder;
 import com.tencent.cloud.common.pojo.PolarisServiceInstance;
 import com.tencent.cloud.common.util.ApplicationContextAwareUtils;
 import com.tencent.cloud.polaris.loadbalancer.config.PolarisLoadBalancerProperties;
-import com.tencent.cloud.polaris.router.config.PolarisMetadataRouterProperties;
+import com.tencent.cloud.polaris.router.config.properties.PolarisMetadataRouterProperties;
-import com.tencent.cloud.polaris.router.config.PolarisNearByRouterProperties;
+import com.tencent.cloud.polaris.router.config.properties.PolarisNearByRouterProperties;
-import com.tencent.cloud.polaris.router.config.PolarisRuleBasedRouterProperties;
+import com.tencent.cloud.polaris.router.config.properties.PolarisRuleBasedRouterProperties;
+import com.tencent.cloud.polaris.router.interceptor.MetadataRouterRequestInterceptor;
+import com.tencent.cloud.polaris.router.interceptor.NearbyRouterRequestInterceptor;
+import com.tencent.cloud.polaris.router.interceptor.RuleBasedRouterRequestInterceptor;
+import com.tencent.cloud.polaris.router.spi.RouterRequestInterceptor;
 import com.tencent.polaris.api.pojo.DefaultInstance;
 import com.tencent.polaris.api.pojo.DefaultServiceInstances;
 import com.tencent.polaris.api.pojo.Instance;
@@ -46,6 +50,7 @@ import com.tencent.polaris.router.api.core.RouterAPI;
 import com.tencent.polaris.router.api.rpc.ProcessRoutersRequest;
 import com.tencent.polaris.router.api.rpc.ProcessRoutersResponse;
 import org.junit.Assert;
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
@@ -62,13 +67,18 @@ import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.Mockito.when;
 
 /**
- * test for {@link PolarisRouterServiceInstanceListSupplier}
+ * test for {@link PolarisRouterServiceInstanceListSupplier}.
+ *
  * @author lepdou 2022-05-26
  */
 @RunWith(MockitoJUnitRunner.class)
 public class PolarisRouterServiceInstanceListSupplierTest {
 
-	private static AtomicBoolean initTransitiveMetadata = new AtomicBoolean(false);
+	private static final AtomicBoolean initTransitiveMetadata = new AtomicBoolean(false);
+	private final String testNamespace = "testNamespace";
+	private final String testCallerService = "testCallerService";
+	private final String testCalleeService = "testCalleeService";
+	private final List<RouterRequestInterceptor> requestInterceptors = new ArrayList<>();
 	@Mock
 	private ServiceInstanceListSupplier delegate;
 	@Mock
@@ -81,9 +91,13 @@ public class PolarisRouterServiceInstanceListSupplierTest {
 	private PolarisRuleBasedRouterProperties polarisRuleBasedRouterProperties;
 	@Mock
 	private RouterAPI routerAPI;
-	private String testNamespace = "testNamespace";
+
-	private String testCallerService = "testCallerService";
+	@Before
-	private String testCalleeService = "testCalleeService";
+	public void before() {
+		requestInterceptors.add(new MetadataRouterRequestInterceptor(polarisMetadataRouterProperties));
+		requestInterceptors.add(new NearbyRouterRequestInterceptor(polarisNearByRouterProperties));
+		requestInterceptors.add(new RuleBasedRouterRequestInterceptor(polarisRuleBasedRouterProperties));
+	}
 
 	@Test
 	public void testBuildMetadataRouteRequest() {
@@ -95,14 +109,19 @@ public class PolarisRouterServiceInstanceListSupplierTest {
 
 			setTransitiveMetadata();
 
-			PolarisRouterServiceInstanceListSupplier compositeRule = new PolarisRouterServiceInstanceListSupplier(
+			PolarisRouterServiceInstanceListSupplier polarisSupplier = new PolarisRouterServiceInstanceListSupplier(
-					delegate, routerAPI, polarisNearByRouterProperties,
+					delegate, routerAPI, requestInterceptors, null);
-					polarisMetadataRouterProperties, polarisRuleBasedRouterProperties);
 
 			ServiceInstances serviceInstances = assembleServiceInstances();
 			PolarisRouterContext routerContext = assembleRouterContext();
 
-			ProcessRoutersRequest request = compositeRule.buildProcessRoutersRequest(serviceInstances, routerContext);
+			Map<String, String> oldRouterLabels = routerContext.getLabels(PolarisRouterContext.ROUTER_LABELS);
+			Map<String, String> newRouterLabels = new HashMap<>(oldRouterLabels);
+			newRouterLabels.put("system-metadata-router-keys", "k2");
+			routerContext.putLabels(PolarisRouterContext.ROUTER_LABELS, newRouterLabels);
+
+			ProcessRoutersRequest request = polarisSupplier.buildProcessRoutersRequest(serviceInstances, routerContext);
+			polarisSupplier.processRouterRequestInterceptors(request, routerContext);
 
 			Map<String, String> routerMetadata = request.getRouterMetadata(MetadataRouter.ROUTER_TYPE_METADATA);
 
@@ -124,14 +143,14 @@ public class PolarisRouterServiceInstanceListSupplierTest {
 
 			setTransitiveMetadata();
 
-			PolarisRouterServiceInstanceListSupplier compositeRule = new PolarisRouterServiceInstanceListSupplier(
+			PolarisRouterServiceInstanceListSupplier polarisSupplier = new PolarisRouterServiceInstanceListSupplier(
-					delegate, routerAPI, polarisNearByRouterProperties,
+					delegate, routerAPI, requestInterceptors, null);
-					polarisMetadataRouterProperties, polarisRuleBasedRouterProperties);
 
 			ServiceInstances serviceInstances = assembleServiceInstances();
 			PolarisRouterContext routerContext = assembleRouterContext();
 
-			ProcessRoutersRequest request = compositeRule.buildProcessRoutersRequest(serviceInstances, routerContext);
+			ProcessRoutersRequest request = polarisSupplier.buildProcessRoutersRequest(serviceInstances, routerContext);
+			polarisSupplier.processRouterRequestInterceptors(request, routerContext);
 
 			Map<String, String> routerMetadata = request.getRouterMetadata(NearbyRouter.ROUTER_TYPE_NEAR_BY);
 
@@ -154,14 +173,14 @@ public class PolarisRouterServiceInstanceListSupplierTest {
 
 			setTransitiveMetadata();
 
-			PolarisRouterServiceInstanceListSupplier compositeRule = new PolarisRouterServiceInstanceListSupplier(
+			PolarisRouterServiceInstanceListSupplier polarisSupplier = new PolarisRouterServiceInstanceListSupplier(
-					delegate, routerAPI, polarisNearByRouterProperties,
+					delegate, routerAPI, requestInterceptors, null);
-					polarisMetadataRouterProperties, polarisRuleBasedRouterProperties);
 
 			ServiceInstances serviceInstances = assembleServiceInstances();
 			PolarisRouterContext routerContext = assembleRouterContext();
 
-			ProcessRoutersRequest request = compositeRule.buildProcessRoutersRequest(serviceInstances, routerContext);
+			ProcessRoutersRequest request = polarisSupplier.buildProcessRoutersRequest(serviceInstances, routerContext);
+			polarisSupplier.processRouterRequestInterceptors(request, routerContext);
 
 			Map<String, String> routerMetadata = request.getRouterMetadata(RuleBasedRouter.ROUTER_TYPE_RULE_BASED);
 
@@ -184,14 +203,13 @@ public class PolarisRouterServiceInstanceListSupplierTest {
 
 			setTransitiveMetadata();
 
-			PolarisRouterServiceInstanceListSupplier compositeRule = new PolarisRouterServiceInstanceListSupplier(
+			PolarisRouterServiceInstanceListSupplier polarisSupplier = new PolarisRouterServiceInstanceListSupplier(
-					delegate, routerAPI, polarisNearByRouterProperties,
+					delegate, routerAPI, requestInterceptors, null);
-					polarisMetadataRouterProperties, polarisRuleBasedRouterProperties);
 
 			ProcessRoutersResponse assembleResponse = assembleProcessRoutersResponse();
 			when(routerAPI.processRouters(any())).thenReturn(assembleResponse);
 
-			Flux<List<ServiceInstance>> servers = compositeRule.doRouter(assembleServers(), assembleRouterContext());
+			Flux<List<ServiceInstance>> servers = polarisSupplier.doRouter(assembleServers(), assembleRouterContext());
 
 
 			Assert.assertEquals(assembleResponse.getServiceInstances().getInstances().size(),
@@ -228,8 +246,8 @@ public class PolarisRouterServiceInstanceListSupplierTest {
 		Map<String, String> routerLabels = new HashMap<>();
 		routerLabels.put("k2", "v2");
 		routerLabels.put("k3", "v3");
-		routerContext.setLabels(PolarisRouterContext.TRANSITIVE_LABELS, transitiveLabels);
+		routerContext.putLabels(PolarisRouterContext.TRANSITIVE_LABELS, transitiveLabels);
-		routerContext.setLabels(PolarisRouterContext.RULE_ROUTER_LABELS, routerLabels);
+		routerContext.putLabels(PolarisRouterContext.ROUTER_LABELS, routerLabels);
 		return routerContext;
 	}
 

spring-cloud-starter-tencent-polaris-router/src/test/java/com/tencent/cloud/polaris/router/beanprocessor/LoadBalancerInterceptorBeanPostProcessorTest.java

@@ -13,14 +13,14 @@
  * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
  * CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
- *
  */
 
-package com.tencent.cloud.polaris.router.resttemplate;
+package com.tencent.cloud.polaris.router.beanprocessor;
 
-import com.tencent.cloud.common.metadata.config.MetadataLocalProperties;
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
 import com.tencent.cloud.common.util.BeanFactoryUtils;
 import com.tencent.cloud.polaris.router.RouterRuleLabelResolver;
+import com.tencent.cloud.polaris.router.resttemplate.PolarisLoadBalancerInterceptor;
 import com.tencent.cloud.polaris.router.spi.SpringWebRouterLabelResolver;
 import org.junit.Assert;
 import org.junit.Test;
@@ -38,18 +38,19 @@ import org.springframework.cloud.client.loadbalancer.LoadBalancerRequestFactory;
 import static org.mockito.Mockito.when;
 
 /**
- * Test for ${@link PolarisLoadBalancerBeanPostProcessor}
+ * Test for ${@link LoadBalancerInterceptorBeanPostProcessor}.
+ *
  * @author lepdou 2022-05-26
  */
 @RunWith(MockitoJUnitRunner.class)
-public class PolarisLoadBalancerBeanPostProcessorTest {
+public class LoadBalancerInterceptorBeanPostProcessorTest {
 
 	@Mock
 	private LoadBalancerClient loadBalancerClient;
 	@Mock
 	private LoadBalancerRequestFactory loadBalancerRequestFactory;
 	@Mock
-	private MetadataLocalProperties metadataLocalProperties;
+	private StaticMetadataManager staticMetadataManager;
 	@Mock
 	private RouterRuleLabelResolver routerRuleLabelResolver;
 	@Mock
@@ -59,7 +60,7 @@ public class PolarisLoadBalancerBeanPostProcessorTest {
 	public void testWrapperLoadBalancerInterceptor() {
 		when(beanFactory.getBean(LoadBalancerRequestFactory.class)).thenReturn(loadBalancerRequestFactory);
 		when(beanFactory.getBean(LoadBalancerClient.class)).thenReturn(loadBalancerClient);
-		when(beanFactory.getBean(MetadataLocalProperties.class)).thenReturn(metadataLocalProperties);
+		when(beanFactory.getBean(StaticMetadataManager.class)).thenReturn(staticMetadataManager);
 		when(beanFactory.getBean(RouterRuleLabelResolver.class)).thenReturn(routerRuleLabelResolver);
 
 		try (MockedStatic<BeanFactoryUtils> mockedBeanFactoryUtils = Mockito.mockStatic(BeanFactoryUtils.class)) {
@@ -67,7 +68,7 @@ public class PolarisLoadBalancerBeanPostProcessorTest {
 					.thenReturn(null);
 			LoadBalancerInterceptor loadBalancerInterceptor = new LoadBalancerInterceptor(loadBalancerClient, loadBalancerRequestFactory);
 
-			PolarisLoadBalancerBeanPostProcessor processor = new PolarisLoadBalancerBeanPostProcessor();
+			LoadBalancerInterceptorBeanPostProcessor processor = new LoadBalancerInterceptorBeanPostProcessor();
 			processor.setBeanFactory(beanFactory);
 
 			Object bean = processor.postProcessBeforeInitialization(loadBalancerInterceptor, "");
@@ -78,7 +79,7 @@ public class PolarisLoadBalancerBeanPostProcessorTest {
 
 	@Test
 	public void testNotWrapperLoadBalancerInterceptor() {
-		PolarisLoadBalancerBeanPostProcessor processor = new PolarisLoadBalancerBeanPostProcessor();
+		LoadBalancerInterceptorBeanPostProcessor processor = new LoadBalancerInterceptorBeanPostProcessor();
 		processor.setBeanFactory(beanFactory);
 
 		OtherBean otherBean = new OtherBean();

spring-cloud-starter-tencent-polaris-router/src/test/java/com/tencent/cloud/polaris/router/beanprocessor/ReactiveLoadBalancerClientFilterBeanPostProcessorTest.java

@@ -13,14 +13,14 @@
  * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
  * CONDITIONS OF ANY KIND, either express or implied. See the License for the
  * specific language governing permissions and limitations under the License.
- *
  */
 
-package com.tencent.cloud.polaris.router.scg;
+package com.tencent.cloud.polaris.router.beanprocessor;
 
-import com.tencent.cloud.common.metadata.config.MetadataLocalProperties;
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
 import com.tencent.cloud.common.util.BeanFactoryUtils;
 import com.tencent.cloud.polaris.router.RouterRuleLabelResolver;
+import com.tencent.cloud.polaris.router.scg.PolarisReactiveLoadBalancerClientFilter;
 import com.tencent.cloud.polaris.router.spi.SpringWebRouterLabelResolver;
 import org.junit.Assert;
 import org.junit.Test;
@@ -40,11 +40,12 @@ import static org.mockito.Mockito.when;
 
 
 /**
- * Test for ${@link PolarisLoadBalancerClientBeanPostProcessor}
+ * Test for ${@link ReactiveLoadBalancerClientFilterBeanPostProcessor}.
+ *
  * @author lepdou 2022-07-04
  */
 @RunWith(MockitoJUnitRunner.class)
-public class PolarisLoadBalancerClientBeanPostProcessorTest {
+public class ReactiveLoadBalancerClientFilterBeanPostProcessorTest {
 
 	@Mock
 	private BeanFactory beanFactory;
@@ -55,7 +56,7 @@ public class PolarisLoadBalancerClientBeanPostProcessorTest {
 	@Mock
 	private LoadBalancerProperties loadBalancerProperties;
 	@Mock
-	private MetadataLocalProperties metadataLocalProperties;
+	private StaticMetadataManager staticMetadataManager;
 	@Mock
 	private RouterRuleLabelResolver routerRuleLabelResolver;
 
@@ -64,7 +65,7 @@ public class PolarisLoadBalancerClientBeanPostProcessorTest {
 		when(beanFactory.getBean(LoadBalancerClientFactory.class)).thenReturn(loadBalancerClientFactory);
 		when(beanFactory.getBean(GatewayLoadBalancerProperties.class)).thenReturn(gatewayLoadBalancerProperties);
 		when(beanFactory.getBean(LoadBalancerProperties.class)).thenReturn(loadBalancerProperties);
-		when(beanFactory.getBean(MetadataLocalProperties.class)).thenReturn(metadataLocalProperties);
+		when(beanFactory.getBean(StaticMetadataManager.class)).thenReturn(staticMetadataManager);
 		when(beanFactory.getBean(RouterRuleLabelResolver.class)).thenReturn(routerRuleLabelResolver);
 
 		try (MockedStatic<BeanFactoryUtils> mockedBeanFactoryUtils = Mockito.mockStatic(BeanFactoryUtils.class)) {
@@ -74,7 +75,7 @@ public class PolarisLoadBalancerClientBeanPostProcessorTest {
 			ReactiveLoadBalancerClientFilter reactiveLoadBalancerClientFilter = new ReactiveLoadBalancerClientFilter(
 					loadBalancerClientFactory, gatewayLoadBalancerProperties, loadBalancerProperties);
 
-			PolarisLoadBalancerClientBeanPostProcessor processor = new PolarisLoadBalancerClientBeanPostProcessor();
+			ReactiveLoadBalancerClientFilterBeanPostProcessor processor = new ReactiveLoadBalancerClientFilterBeanPostProcessor();
 			processor.setBeanFactory(beanFactory);
 
 			Object bean = processor.postProcessBeforeInitialization(reactiveLoadBalancerClientFilter, "");
@@ -85,7 +86,7 @@ public class PolarisLoadBalancerClientBeanPostProcessorTest {
 
 	@Test
 	public void testNotWrapLoadBalancerInterceptor() {
-		PolarisLoadBalancerClientBeanPostProcessor processor = new PolarisLoadBalancerClientBeanPostProcessor();
+		ReactiveLoadBalancerClientFilterBeanPostProcessor processor = new ReactiveLoadBalancerClientFilterBeanPostProcessor();
 		processor.setBeanFactory(beanFactory);
 
 		OtherBean otherBean = new OtherBean();

spring-cloud-starter-tencent-polaris-router/src/test/java/com/tencent/cloud/polaris/router/feign/RouterLabelFeignInterceptorTest.java

@@ -29,7 +29,7 @@ import java.util.Set;
 
 import com.tencent.cloud.common.metadata.MetadataContext;
 import com.tencent.cloud.common.metadata.MetadataContextHolder;
-import com.tencent.cloud.common.metadata.config.MetadataLocalProperties;
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
 import com.tencent.cloud.common.util.ApplicationContextAwareUtils;
 import com.tencent.cloud.common.util.JacksonUtils;
 import com.tencent.cloud.polaris.router.RouterConstants;
@@ -56,7 +56,7 @@ import static org.mockito.Mockito.when;
 public class RouterLabelFeignInterceptorTest {
 
 	@Mock
-	private MetadataLocalProperties metadataLocalProperties;
+	private StaticMetadataManager staticMetadataManager;
 	@Mock
 	private RouterRuleLabelResolver routerRuleLabelResolver;
 	@Mock
@@ -66,7 +66,7 @@ public class RouterLabelFeignInterceptorTest {
 	public void testResolveRouterLabel() throws UnsupportedEncodingException {
 		RouterLabelFeignInterceptor routerLabelFeignInterceptor = new RouterLabelFeignInterceptor(
 				Collections.singletonList(routerLabelResolver),
-				metadataLocalProperties, routerRuleLabelResolver);
+				staticMetadataManager, routerRuleLabelResolver);
 
 		// mock request template
 		RequestTemplate requestTemplate = new RequestTemplate();
@@ -111,7 +111,7 @@ public class RouterLabelFeignInterceptorTest {
 				Map<String, String> localMetadata = new HashMap<>();
 				localMetadata.put("k3", "v31");
 				localMetadata.put("k4", "v4");
-				when(metadataLocalProperties.getContent()).thenReturn(localMetadata);
+				when(staticMetadataManager.getMergedStaticMetadata()).thenReturn(localMetadata);
 
 				routerLabelFeignInterceptor.apply(requestTemplate);
 

spring-cloud-starter-tencent-polaris-router/src/test/java/com/tencent/cloud/polaris/router/resttemplate/PolarisLoadBalancerInterceptorTest.java

@@ -29,7 +29,7 @@ import java.util.Set;
 
 import com.tencent.cloud.common.metadata.MetadataContext;
 import com.tencent.cloud.common.metadata.MetadataContextHolder;
-import com.tencent.cloud.common.metadata.config.MetadataLocalProperties;
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
 import com.tencent.cloud.common.util.ApplicationContextAwareUtils;
 import com.tencent.cloud.common.util.JacksonUtils;
 import com.tencent.cloud.polaris.router.RouterConstants;
@@ -74,7 +74,7 @@ public class PolarisLoadBalancerInterceptorTest {
 	@Mock
 	private SpringWebRouterLabelResolver routerLabelResolver;
 	@Mock
-	private MetadataLocalProperties metadataLocalProperties;
+	private StaticMetadataManager staticMetadataManager;
 	@Mock
 	private RouterRuleLabelResolver routerRuleLabelResolver;
 
@@ -103,7 +103,7 @@ public class PolarisLoadBalancerInterceptorTest {
 		Map<String, String> localMetadata = new HashMap<>();
 		localMetadata.put("k1", "v1");
 		localMetadata.put("k2", "v2");
-		when(metadataLocalProperties.getContent()).thenReturn(localMetadata);
+		when(staticMetadataManager.getMergedStaticMetadata()).thenReturn(localMetadata);
 
 		// mock expression rule labels
 
@@ -132,11 +132,11 @@ public class PolarisLoadBalancerInterceptorTest {
 		when(loadBalancerRequestFactory.createRequest(request, null, null)).thenReturn(loadBalancerRequest);
 
 		PolarisLoadBalancerInterceptor polarisLoadBalancerInterceptor = new PolarisLoadBalancerInterceptor(loadBalancerClient,
-				loadBalancerRequestFactory, Collections.singletonList(routerLabelResolver), metadataLocalProperties, routerRuleLabelResolver);
+				loadBalancerRequestFactory, Collections.singletonList(routerLabelResolver), staticMetadataManager, routerRuleLabelResolver);
 
 		polarisLoadBalancerInterceptor.intercept(request, null, null);
 
-		verify(metadataLocalProperties).getContent();
+		verify(staticMetadataManager).getMergedStaticMetadata();
 		verify(routerRuleLabelResolver).getExpressionLabelKeys(callerService, callerService, calleeService);
 		verify(routerLabelResolver).resolve(request, null, expressionKeys);
 	}
@@ -151,7 +151,7 @@ public class PolarisLoadBalancerInterceptorTest {
 		Map<String, String> localMetadata = new HashMap<>();
 		localMetadata.put("k1", "v1");
 		localMetadata.put("k2", "v2");
-		when(metadataLocalProperties.getContent()).thenReturn(localMetadata);
+		when(staticMetadataManager.getMergedStaticMetadata()).thenReturn(localMetadata);
 
 		// mock expression rule labels
 
@@ -177,11 +177,11 @@ public class PolarisLoadBalancerInterceptorTest {
 		mockedMetadataContextHolder.when(MetadataContextHolder::get).thenReturn(metadataContext);
 
 		PolarisLoadBalancerInterceptor polarisLoadBalancerInterceptor = new PolarisLoadBalancerInterceptor(loadBalancerClient,
-				loadBalancerRequestFactory, Collections.singletonList(routerLabelResolver), metadataLocalProperties, routerRuleLabelResolver);
+				loadBalancerRequestFactory, Collections.singletonList(routerLabelResolver), staticMetadataManager, routerRuleLabelResolver);
 
 		polarisLoadBalancerInterceptor.setLabelsToHeaders(request, null, calleeService);
 
-		verify(metadataLocalProperties).getContent();
+		verify(staticMetadataManager).getMergedStaticMetadata();
 		verify(routerRuleLabelResolver).getExpressionLabelKeys(callerService, callerService, calleeService);
 		verify(routerLabelResolver).resolve(request, null, expressionKeys);
 

spring-cloud-starter-tencent-polaris-router/src/test/java/com/tencent/cloud/polaris/router/scg/PolarisReactiveLoadBalancerClientFilterTest.java

@@ -29,7 +29,7 @@ import com.google.common.collect.Lists;
 import com.google.common.collect.Sets;
 import com.tencent.cloud.common.metadata.MetadataContext;
 import com.tencent.cloud.common.metadata.MetadataContextHolder;
-import com.tencent.cloud.common.metadata.config.MetadataLocalProperties;
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
 import com.tencent.cloud.common.util.ApplicationContextAwareUtils;
 import com.tencent.cloud.common.util.JacksonUtils;
 import com.tencent.cloud.polaris.router.RouterConstants;
@@ -70,7 +70,7 @@ public class PolarisReactiveLoadBalancerClientFilterTest {
 	private static MockedStatic<MetadataContextHolder> mockedMetadataContextHolder;
 
 	@Mock
-	private MetadataLocalProperties metadataLocalProperties;
+	private StaticMetadataManager staticMetadataManager;
 	@Mock
 	private SpringWebRouterLabelResolver routerLabelResolver;
 	@Mock
@@ -109,12 +109,12 @@ public class PolarisReactiveLoadBalancerClientFilterTest {
 	@Test
 	public void testGenRouterHttpHeaders() throws UnsupportedEncodingException {
 		PolarisReactiveLoadBalancerClientFilter filter = new PolarisReactiveLoadBalancerClientFilter(loadBalancerClientFactory,
-				gatewayLoadBalancerProperties, loadBalancerProperties, metadataLocalProperties, routerRuleLabelResolver,
+				gatewayLoadBalancerProperties, loadBalancerProperties, staticMetadataManager, routerRuleLabelResolver,
 				Lists.newArrayList(routerLabelResolver));
 
 		Map<String, String> localMetadata = new HashMap<>();
 		localMetadata.put("env", "blue");
-		when(metadataLocalProperties.getContent()).thenReturn(localMetadata);
+		when(staticMetadataManager.getMergedStaticMetadata()).thenReturn(localMetadata);
 
 		Set<String> expressionLabelKeys = Sets.newHashSet("${http.header.k1}", "${http.query.userid}");
 		when(routerRuleLabelResolver.getExpressionLabelKeys(anyString(), anyString(), anyString())).thenReturn(expressionLabelKeys);

spring-cloud-tencent-commons/src/main/java/com/tencent/cloud/common/constant/MetadataConstant.java

@@ -27,11 +27,26 @@ import org.springframework.core.Ordered;
 public final class MetadataConstant {
 
 	/**
-	 * Default Private Constructor.
+	 * sct transitive header prefix.
 	 */
+	public static final String SCT_TRANSITIVE_HEADER_PREFIX = "X-SCT-Metadata-Transitive-";
+	/**
+	 * sct transitive header prefix length.
+	 */
+	public static final int SCT_TRANSITIVE_HEADER_PREFIX_LENGTH = SCT_TRANSITIVE_HEADER_PREFIX.length();
+
+	/**
+	 * polaris transitive header prefix.
+	 */
+	public static final String POLARIS_TRANSITIVE_HEADER_PREFIX = "X-Polaris-Metadata-Transitive-";
+	/**
+	 * polaris transitive header prefix length.
+	 */
+	public static final int POLARIS_TRANSITIVE_HEADER_PREFIX_LENGTH = POLARIS_TRANSITIVE_HEADER_PREFIX.length();
+
 	private MetadataConstant() {
-	}
 
+	}
 	/**
 	 * Order of filter, interceptor, ...
 	 */

spring-cloud-tencent-commons/src/main/java/com/tencent/cloud/common/metadata/config/MetadataAutoConfiguration.java

@@ -19,11 +19,8 @@
 package com.tencent.cloud.common.metadata.config;
 
 import com.tencent.cloud.common.metadata.StaticMetadataManager;
-import com.tencent.cloud.common.metadata.filter.gateway.MetadataFirstScgFilter;
 import com.tencent.cloud.common.spi.InstanceMetadataProvider;
 
-import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
-import org.springframework.cloud.gateway.filter.GlobalFilter;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.lang.Nullable;
@@ -51,16 +48,4 @@ public class MetadataAutoConfiguration {
 		return new StaticMetadataManager(metadataLocalProperties, instanceMetadataProvider);
 	}
 
-	/**
-	 * Create when gateway application is SCG.
-	 */
-	@Configuration(proxyBeanMethods = false)
-	@ConditionalOnClass(name = "org.springframework.cloud.gateway.filter.GlobalFilter")
-	protected static class MetadataScgFilterConfig {
-
-		@Bean
-		public GlobalFilter metadataFirstScgFilter() {
-			return new MetadataFirstScgFilter();
-		}
-	}
 }

spring-cloud-tencent-commons/src/main/java/com/tencent/cloud/common/metadata/filter/gateway/MetadataFirstScgFilter.java

@@ -1,64 +0,0 @@
-/*
- * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
- *
- * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations under the License.
- *
- */
-
-package com.tencent.cloud.common.metadata.filter.gateway;
-
-import com.tencent.cloud.common.constant.MetadataConstant;
-import com.tencent.cloud.common.metadata.MetadataContext;
-import com.tencent.cloud.common.metadata.MetadataContextHolder;
-import reactor.core.publisher.Mono;
-
-import org.springframework.cloud.gateway.filter.GatewayFilterChain;
-import org.springframework.cloud.gateway.filter.GlobalFilter;
-import org.springframework.core.Ordered;
-import org.springframework.web.server.ServerWebExchange;
-
-import static org.springframework.cloud.gateway.filter.RouteToRequestUrlFilter.ROUTE_TO_URL_FILTER_ORDER;
-
-/**
- * Scg output first filter used for setting peer info in context.
- *
- * @author Haotian Zhang
- */
-public class MetadataFirstScgFilter implements GlobalFilter, Ordered {
-
-	/**
-	 * Order of MetadataFirstScgFilter.
-	 */
-	public static final int METADATA_FIRST_FILTER_ORDER = ROUTE_TO_URL_FILTER_ORDER + 1;
-
-	@Override
-	public int getOrder() {
-		return METADATA_FIRST_FILTER_ORDER;
-	}
-
-	@Override
-	public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
-		// get metadata of current thread
-		MetadataContext metadataContext = exchange
-				.getAttribute(MetadataConstant.HeaderName.METADATA_CONTEXT);
-		if (metadataContext == null) {
-			metadataContext = MetadataContextHolder.get();
-		}
-
-		exchange.getAttributes().put(MetadataConstant.HeaderName.METADATA_CONTEXT,
-				metadataContext);
-
-		return chain.filter(exchange);
-	}
-}

spring-cloud-tencent-commons/src/main/java/com/tencent/cloud/common/rule/Condition.java

@@ -0,0 +1,65 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.common.rule;
+
+import java.util.List;
+
+/**
+ * Condition expression.
+ * @author lepdou 2022-07-06
+ */
+public class Condition {
+
+	private String key;
+	private String operation;
+	private List<String> values;
+
+	public String getKey() {
+		return key;
+	}
+
+	public void setKey(String key) {
+		this.key = key;
+	}
+
+	public List<String> getValues() {
+		return values;
+	}
+
+	public void setValues(List<String> values) {
+		this.values = values;
+	}
+
+	public String getOperation() {
+		return operation;
+	}
+
+	public void setOperation(String operation) {
+		this.operation = operation;
+	}
+
+	@Override
+	public String toString() {
+		return "Condition{" +
+				"key='" + key + '\'' +
+				", values='" + values + '\'' +
+				", operation='" + operation + '\'' +
+				'}';
+	}
+}

spring-cloud-tencent-commons/src/main/java/com/tencent/cloud/common/rule/ConditionUtils.java

@@ -0,0 +1,48 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.common.rule;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * The util for condition expression.
+ * @author lepdou 2022-07-11
+ */
+public final class ConditionUtils {
+
+	private ConditionUtils() {
+	}
+
+	public static boolean match(Map<String, String> actualValues, List<Condition> conditions) {
+		boolean allMatched = true;
+		for (Condition condition : conditions) {
+			List<String> expectedValues = condition.getValues();
+			String operation = condition.getOperation();
+			String key = condition.getKey();
+			String actualValue = actualValues.get(key);
+
+			if (!Operation.match(expectedValues, actualValue, operation)) {
+				allMatched = false;
+				break;
+			}
+		}
+		return allMatched;
+	}
+}

spring-cloud-tencent-commons/src/main/java/com/tencent/cloud/common/rule/KVPair.java

@@ -0,0 +1,54 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.common.rule;
+
+/**
+ * Key/value pair.
+ * @author lepdou 2022-07-06
+ */
+public class KVPair {
+
+	private String key;
+	private String value;
+
+	public String getKey() {
+		return key;
+	}
+
+	public void setKey(String key) {
+		this.key = key;
+	}
+
+	public String getValue() {
+		return value;
+	}
+
+	public void setValue(String value) {
+		this.value = value;
+	}
+
+
+	@Override
+	public String toString() {
+		return "KVPair{" +
+				"key='" + key + '\'' +
+				", value='" + value + '\'' +
+				'}';
+	}
+}

spring-cloud-tencent-commons/src/main/java/com/tencent/cloud/common/rule/KVPairUtils.java

@@ -0,0 +1,49 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.common.rule;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.springframework.util.CollectionUtils;
+
+/**
+ * The util for key/value pair.
+ * @author lepdou 2022-07-11
+ */
+public final class KVPairUtils {
+
+	private KVPairUtils() {
+	}
+
+	public static Map<String, String> toMap(List<KVPair> labels) {
+		if (CollectionUtils.isEmpty(labels)) {
+			return Collections.emptyMap();
+		}
+
+		Map<String, String> result = new HashMap<>();
+		labels.forEach(label -> {
+			result.put(label.getKey(), label.getValue());
+		});
+
+		return result;
+	}
+}

spring-cloud-tencent-commons/src/main/java/com/tencent/cloud/common/rule/Operation.java

@@ -0,0 +1,133 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.common.rule;
+
+import java.util.List;
+import java.util.regex.Pattern;
+
+import org.apache.commons.lang.StringUtils;
+
+import org.springframework.util.CollectionUtils;
+
+/**
+ * The condition operation.
+ * @author lepdou 2022-07-11
+ */
+public enum Operation {
+
+	/**
+	 * case sensitive string equals.
+	 */
+	EQUALS("EQUALS"),
+	/**
+	 * case sensitive string not equals.
+	 */
+	NOT_EQUALS("NOT_EQUALS"),
+	/**
+	 * whether element in collection.
+	 */
+	IN("IN"),
+	/**
+	 * whether element not in collection.
+	 */
+	NOT_IN("NOT_IN"),
+	/**
+	 * regex operation.
+	 */
+	REGEX("REGEX"),
+	/**
+	 * whether element is blank.
+	 */
+	BLANK("BLANK"),
+	/**
+	 * whether element is not blank.
+	 */
+	NOT_BLANK("NOT_BLANK");
+
+	private final String value;
+
+	Operation(String value) {
+		this.value = value;
+	}
+
+	public static boolean match(List<String> expectedValues, String actualValue, String rawOperation) {
+		String firstExpectedValue = null;
+		if (!CollectionUtils.isEmpty(expectedValues)) {
+			firstExpectedValue = expectedValues.get(0);
+		}
+
+		switch (getOperation(rawOperation)) {
+		case EQUALS:
+			return firstExpectedValue != null && StringUtils.equals(actualValue, firstExpectedValue);
+		case NOT_EQUALS:
+			return firstExpectedValue == null || !StringUtils.equals(actualValue, firstExpectedValue);
+		case BLANK:
+			return StringUtils.isBlank(actualValue);
+		case NOT_BLANK:
+			return !StringUtils.isBlank(actualValue);
+		case IN:
+			if (CollectionUtils.isEmpty(expectedValues)) {
+				return false;
+			}
+			return expectedValues.contains(actualValue);
+		case NOT_IN:
+			if (CollectionUtils.isEmpty(expectedValues)) {
+				return true;
+			}
+			return !expectedValues.contains(actualValue);
+		case REGEX:
+			if (firstExpectedValue == null) {
+				return false;
+			}
+			Pattern r = Pattern.compile(firstExpectedValue);
+			return r.matcher(actualValue).matches();
+		default:
+			return false;
+		}
+	}
+
+	public static Operation getOperation(String operation) {
+		if (StringUtils.equalsIgnoreCase(operation, EQUALS.value)) {
+			return EQUALS;
+		}
+		if (StringUtils.equalsIgnoreCase(operation, NOT_EQUALS.value)) {
+			return NOT_EQUALS;
+		}
+		if (StringUtils.equalsIgnoreCase(operation, IN.value)) {
+			return IN;
+		}
+		if (StringUtils.equalsIgnoreCase(operation, NOT_IN.value)) {
+			return NOT_IN;
+		}
+		if (StringUtils.equalsIgnoreCase(operation, REGEX.value)) {
+			return REGEX;
+		}
+		if (StringUtils.equalsIgnoreCase(operation, BLANK.value)) {
+			return BLANK;
+		}
+		if (StringUtils.equalsIgnoreCase(operation, NOT_BLANK.value)) {
+			return NOT_BLANK;
+		}
+		throw new RuntimeException("Unsupported operation. operation = " + operation);
+	}
+
+	public String getValue() {
+		return value;
+	}
+}

spring-cloud-tencent-commons/src/main/java/com/tencent/cloud/common/util/ExpressionLabelUtils.java

@@ -1,316 +0,0 @@
-/*
- * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
- *
- * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations under the License.
- *
- */
-
-package com.tencent.cloud.common.util;
-
-import java.util.Collection;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.Set;
-
-import javax.servlet.http.Cookie;
-import javax.servlet.http.HttpServletRequest;
-
-import org.apache.commons.lang.StringUtils;
-
-import org.springframework.http.HttpCookie;
-import org.springframework.http.HttpHeaders;
-import org.springframework.http.HttpRequest;
-import org.springframework.http.server.reactive.ServerHttpRequest;
-import org.springframework.util.CollectionUtils;
-import org.springframework.util.MultiValueMap;
-import org.springframework.web.server.ServerWebExchange;
-
-/**
- * the utils for parse label expression.
- *
- * @author lepdou 2022-05-13
- */
-public final class ExpressionLabelUtils {
-
-	/**
-	 * the expression prefix of header label.
-	 */
-	public static final String LABEL_HEADER_PREFIX = "${http.header.";
-	/**
-	 * the length of expression header label prefix.
-	 */
-	public static final int LABEL_HEADER_PREFIX_LEN = LABEL_HEADER_PREFIX.length();
-	/**
-	 * the expression prefix of query.
-	 */
-	public static final String LABEL_QUERY_PREFIX = "${http.query.";
-	/**
-	 * the length of expression query label prefix.
-	 */
-	public static final int LABEL_QUERY_PREFIX_LEN = LABEL_QUERY_PREFIX.length();
-	/**
-	 * the expression prefix of cookie.
-	 */
-	public static final String LABEL_COOKIE_PREFIX = "${http.cookie.";
-	/**
-	 * the length of expression cookie label prefix.
-	 */
-	public static final int LABEL_COOKIE_PREFIX_LEN = LABEL_COOKIE_PREFIX.length();
-	/**
-	 * the expression of method.
-	 */
-	public static final String LABEL_METHOD = "${http.method}";
-	/**
-	 * the expression of uri.
-	 */
-	public static final String LABEL_URI = "${http.uri}";
-	/**
-	 * the prefix of expression.
-	 */
-	public static final String LABEL_PREFIX = "${";
-	/**
-	 * the suffix of expression.
-	 */
-	public static final String LABEL_SUFFIX = "}";
-
-	private ExpressionLabelUtils() {
-	}
-
-	public static boolean isExpressionLabel(String labelKey) {
-		if (StringUtils.isEmpty(labelKey)) {
-			return false;
-		}
-		return StringUtils.startsWith(labelKey, LABEL_PREFIX) && StringUtils.endsWith(labelKey, LABEL_SUFFIX);
-	}
-
-	public static Map<String, String> resolve(HttpServletRequest request, Set<String> labelKeys) {
-		if (CollectionUtils.isEmpty(labelKeys)) {
-			return Collections.emptyMap();
-		}
-
-		Map<String, String> labels = new HashMap<>();
-
-		for (String labelKey : labelKeys) {
-			if (!isExpressionLabel(labelKey)) {
-				continue;
-			}
-			if (StringUtils.startsWithIgnoreCase(labelKey, LABEL_HEADER_PREFIX)) {
-				String headerKey = parseHeaderKey(labelKey);
-				if (StringUtils.isBlank(headerKey)) {
-					continue;
-				}
-				labels.put(labelKey, request.getHeader(headerKey));
-			}
-			else if (StringUtils.startsWithIgnoreCase(labelKey, LABEL_QUERY_PREFIX)) {
-				String queryKey = parseQueryKey(labelKey);
-				if (StringUtils.isBlank(queryKey)) {
-					continue;
-				}
-				labels.put(labelKey, getQueryValue(request.getQueryString(), queryKey));
-			}
-			else if (StringUtils.startsWithIgnoreCase(labelKey, LABEL_COOKIE_PREFIX)) {
-				String cookieKey = parseCookieKey(labelKey);
-				if (StringUtils.isBlank(cookieKey)) {
-					continue;
-				}
-				labels.put(labelKey, getCookieValue(request.getCookies(), cookieKey));
-			}
-			else if (StringUtils.equalsIgnoreCase(LABEL_METHOD, labelKey)) {
-				labels.put(labelKey, request.getMethod());
-			}
-			else if (StringUtils.equalsIgnoreCase(LABEL_URI, labelKey)) {
-				labels.put(labelKey, request.getRequestURI());
-			}
-		}
-
-		return labels;
-	}
-
-	public static Map<String, String> resolve(ServerWebExchange exchange, Set<String> labelKeys) {
-		if (CollectionUtils.isEmpty(labelKeys)) {
-			return Collections.emptyMap();
-		}
-
-		Map<String, String> labels = new HashMap<>();
-
-		for (String labelKey : labelKeys) {
-			if (!isExpressionLabel(labelKey)) {
-				continue;
-			}
-			if (StringUtils.startsWithIgnoreCase(labelKey, LABEL_HEADER_PREFIX)) {
-				String headerKey = parseHeaderKey(labelKey);
-				if (StringUtils.isBlank(headerKey)) {
-					continue;
-				}
-				labels.put(labelKey, getHeaderValue(exchange.getRequest(), headerKey));
-			}
-			else if (StringUtils.startsWithIgnoreCase(labelKey, LABEL_QUERY_PREFIX)) {
-				String queryKey = parseQueryKey(labelKey);
-				if (StringUtils.isBlank(queryKey)) {
-					continue;
-				}
-				labels.put(labelKey, getQueryValue(exchange.getRequest(), queryKey));
-			}
-			else if (StringUtils.startsWithIgnoreCase(labelKey, LABEL_COOKIE_PREFIX)) {
-				String cookieKey = parseCookieKey(labelKey);
-				if (StringUtils.isBlank(cookieKey)) {
-					continue;
-				}
-				labels.put(labelKey, getCookieValue(exchange.getRequest(), cookieKey));
-			}
-			else if (StringUtils.equalsIgnoreCase(LABEL_METHOD, labelKey)) {
-				labels.put(labelKey, exchange.getRequest().getMethodValue());
-			}
-			else if (StringUtils.equalsIgnoreCase(LABEL_URI, labelKey)) {
-				labels.put(labelKey, exchange.getRequest().getURI().getPath());
-			}
-		}
-
-		return labels;
-	}
-
-	public static Map<String, String> resolve(HttpRequest request, Set<String> labelKeys) {
-		if (CollectionUtils.isEmpty(labelKeys)) {
-			return Collections.emptyMap();
-		}
-
-		Map<String, String> labels = new HashMap<>();
-
-		for (String labelKey : labelKeys) {
-			if (!isExpressionLabel(labelKey)) {
-				continue;
-			}
-			if (StringUtils.startsWithIgnoreCase(labelKey, LABEL_HEADER_PREFIX)) {
-				String headerKey = parseHeaderKey(labelKey);
-				if (StringUtils.isBlank(headerKey)) {
-					continue;
-				}
-				labels.put(labelKey, getHeaderValue(request, headerKey));
-			}
-			else if (StringUtils.startsWithIgnoreCase(labelKey, LABEL_QUERY_PREFIX)) {
-				String queryKey = parseQueryKey(labelKey);
-				if (StringUtils.isBlank(queryKey)) {
-					continue;
-				}
-				labels.put(labelKey, getQueryValue(request, queryKey));
-			}
-			else if (StringUtils.equalsIgnoreCase(LABEL_METHOD, labelKey)) {
-				labels.put(labelKey, request.getMethodValue());
-			}
-			else if (StringUtils.equalsIgnoreCase(LABEL_URI, labelKey)) {
-				labels.put(labelKey, request.getURI().getPath());
-			}
-		}
-
-		return labels;
-	}
-
-	public static String parseHeaderKey(String expression) {
-		return expression.substring(LABEL_HEADER_PREFIX_LEN, expression.length() - 1);
-	}
-
-	public static String parseQueryKey(String expression) {
-		return expression.substring(LABEL_QUERY_PREFIX_LEN, expression.length() - 1);
-	}
-
-	public static String parseCookieKey(String expression) {
-		return expression.substring(LABEL_COOKIE_PREFIX_LEN, expression.length() - 1);
-	}
-
-	public static String getQueryValue(String queryString, String queryKey) {
-		if (StringUtils.isBlank(queryString)) {
-			return StringUtils.EMPTY;
-		}
-		String[] queries = StringUtils.split(queryString, "&");
-		if (queries == null || queries.length == 0) {
-			return StringUtils.EMPTY;
-		}
-		for (String query : queries) {
-			String[] queryKV = StringUtils.split(query, "=");
-			if (queryKV != null && queryKV.length == 2 && StringUtils.equals(queryKV[0], queryKey)) {
-				return queryKV[1];
-			}
-		}
-		return StringUtils.EMPTY;
-	}
-
-	public static String getCookieValue(Cookie[] cookies, String key) {
-		if (cookies == null || cookies.length == 0) {
-			return StringUtils.EMPTY;
-		}
-		for (Cookie cookie : cookies) {
-			if (StringUtils.equals(cookie.getName(), key)) {
-				return cookie.getValue();
-			}
-		}
-		return StringUtils.EMPTY;
-	}
-
-	public static String getHeaderValue(ServerHttpRequest request, String key) {
-		String value = request.getHeaders().getFirst(key);
-		if (value == null) {
-			return StringUtils.EMPTY;
-		}
-		return value;
-	}
-
-	public static String getQueryValue(ServerHttpRequest request, String key) {
-		MultiValueMap<String, String> queries = request.getQueryParams();
-		if (CollectionUtils.isEmpty(queries)) {
-			return StringUtils.EMPTY;
-		}
-		String value = queries.getFirst(key);
-		if (value == null) {
-			return StringUtils.EMPTY;
-		}
-		return value;
-	}
-
-	public static String getCookieValue(ServerHttpRequest request, String key) {
-		HttpCookie cookie = request.getCookies().getFirst(key);
-		if (cookie == null) {
-			return StringUtils.EMPTY;
-		}
-		return cookie.getValue();
-	}
-
-	public static String getHeaderValue(HttpRequest request, String key) {
-		HttpHeaders headers = request.getHeaders();
-		return headers.getFirst(key);
-	}
-
-	public static String getQueryValue(HttpRequest request, String key) {
-		String query = request.getURI().getQuery();
-		return getQueryValue(query, key);
-	}
-
-	public static String getFirstValue(Map<String, Collection<String>> valueMaps, String key) {
-		if (CollectionUtils.isEmpty(valueMaps)) {
-			return StringUtils.EMPTY;
-		}
-
-		Collection<String> values = valueMaps.get(key);
-
-		if (CollectionUtils.isEmpty(values)) {
-			return StringUtils.EMPTY;
-		}
-
-		for (String value : values) {
-			return value;
-		}
-
-		return StringUtils.EMPTY;
-	}
-}

spring-cloud-tencent-commons/src/main/java/com/tencent/cloud/common/util/JacksonUtils.java

@@ -78,6 +78,16 @@ public final class JacksonUtils {
 		}
 	}
 
+	public static <T> T deserialize(String jsonStr, Class<T> type) {
+		try {
+			return OM.readValue(jsonStr, type);
+		}
+		catch (JsonProcessingException e) {
+			LOG.error("Json to object failed. {}", type, e);
+			throw new RuntimeException("Json to object failed.", e);
+		}
+	}
+
 	/**
 	 * Json to Map.
 	 * @param jsonStr Json String

spring-cloud-tencent-commons/src/main/java/com/tencent/cloud/common/util/expresstion/ExpressionLabelUtils.java

@@ -0,0 +1,135 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.common.util.expresstion;
+
+import java.util.Collection;
+import java.util.Map;
+
+import org.apache.commons.lang.StringUtils;
+
+import org.springframework.util.CollectionUtils;
+
+/**
+ * the utils for parse label expression.
+ *
+ * @author lepdou 2022-05-13
+ * @author cheese8 2022-06-20
+ */
+public final class ExpressionLabelUtils {
+
+	/**
+	 * the expression prefix of header label.
+	 */
+	public static final String LABEL_HEADER_PREFIX = "${http.header.";
+	/**
+	 * the length of expression header label prefix.
+	 */
+	public static final int LABEL_HEADER_PREFIX_LEN = LABEL_HEADER_PREFIX.length();
+	/**
+	 * the expression prefix of query.
+	 */
+	public static final String LABEL_QUERY_PREFIX = "${http.query.";
+	/**
+	 * the length of expression query label prefix.
+	 */
+	public static final int LABEL_QUERY_PREFIX_LEN = LABEL_QUERY_PREFIX.length();
+	/**
+	 * the expression prefix of cookie.
+	 */
+	public static final String LABEL_COOKIE_PREFIX = "${http.cookie.";
+	/**
+	 * the length of expression cookie label prefix.
+	 */
+	public static final int LABEL_COOKIE_PREFIX_LEN = LABEL_COOKIE_PREFIX.length();
+	/**
+	 * the expression of method.
+	 */
+	public static final String LABEL_METHOD = "${http.method}";
+	/**
+	 * the expression of uri.
+	 */
+	public static final String LABEL_URI = "${http.uri}";
+
+	/**
+	 * the prefix of expression.
+	 */
+	public static final String LABEL_PREFIX = "${";
+
+	/**
+	 * the suffix of expression.
+	 */
+	public static final String LABEL_SUFFIX = "}";
+
+	private ExpressionLabelUtils() {
+	}
+
+	public static boolean isExpressionLabel(String labelKey) {
+		if (StringUtils.isEmpty(labelKey)) {
+			return false;
+		}
+		return StringUtils.startsWith(labelKey, LABEL_PREFIX) && StringUtils.endsWith(labelKey, LABEL_SUFFIX);
+	}
+
+	public static String parseHeaderKey(String expression) {
+		return expression.substring(LABEL_HEADER_PREFIX_LEN, expression.length() - 1);
+	}
+
+	public static String parseQueryKey(String expression) {
+		return expression.substring(LABEL_QUERY_PREFIX_LEN, expression.length() - 1);
+	}
+
+	public static String parseCookieKey(String expression) {
+		return expression.substring(LABEL_COOKIE_PREFIX_LEN, expression.length() - 1);
+	}
+
+	public static String getQueryValue(String queryString, String queryKey) {
+		if (StringUtils.isBlank(queryString)) {
+			return StringUtils.EMPTY;
+		}
+		String[] queries = StringUtils.split(queryString, "&");
+		if (queries == null || queries.length == 0) {
+			return StringUtils.EMPTY;
+		}
+		for (String query : queries) {
+			String[] queryKV = StringUtils.split(query, "=");
+			if (queryKV != null && queryKV.length == 2 && StringUtils.equals(queryKV[0], queryKey)) {
+				return queryKV[1];
+			}
+		}
+		return StringUtils.EMPTY;
+	}
+
+	public static String getFirstValue(Map<String, Collection<String>> valueMaps, String key) {
+		if (CollectionUtils.isEmpty(valueMaps)) {
+			return StringUtils.EMPTY;
+		}
+
+		Collection<String> values = valueMaps.get(key);
+
+		if (CollectionUtils.isEmpty(values)) {
+			return StringUtils.EMPTY;
+		}
+
+		for (String value : values) {
+			return value;
+		}
+
+		return StringUtils.EMPTY;
+	}
+}

spring-cloud-tencent-commons/src/main/java/com/tencent/cloud/common/util/expresstion/ServletExpressionLabelUtils.java

@@ -0,0 +1,96 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.common.util.expresstion;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServletRequest;
+
+import org.apache.commons.lang.StringUtils;
+
+import org.springframework.util.CollectionUtils;
+
+/**
+ * Parse labels from HttpServletRequest.
+ * @author lepdou 2022-07-11
+ */
+public final class ServletExpressionLabelUtils {
+
+	private ServletExpressionLabelUtils() {
+	}
+
+	public static Map<String, String> resolve(HttpServletRequest request, Set<String> labelKeys) {
+		if (CollectionUtils.isEmpty(labelKeys)) {
+			return Collections.emptyMap();
+		}
+
+		Map<String, String> labels = new HashMap<>();
+
+		for (String labelKey : labelKeys) {
+			if (!ExpressionLabelUtils.isExpressionLabel(labelKey)) {
+				continue;
+			}
+			if (StringUtils.startsWithIgnoreCase(labelKey, ExpressionLabelUtils.LABEL_HEADER_PREFIX)) {
+				String headerKey = ExpressionLabelUtils.parseHeaderKey(labelKey);
+				if (StringUtils.isBlank(headerKey)) {
+					continue;
+				}
+				labels.put(labelKey, request.getHeader(headerKey));
+			}
+			else if (StringUtils.startsWithIgnoreCase(labelKey, ExpressionLabelUtils.LABEL_QUERY_PREFIX)) {
+				String queryKey = ExpressionLabelUtils.parseQueryKey(labelKey);
+				if (StringUtils.isBlank(queryKey)) {
+					continue;
+				}
+				labels.put(labelKey, ExpressionLabelUtils.getQueryValue(request.getQueryString(), queryKey));
+			}
+			else if (StringUtils.startsWithIgnoreCase(labelKey, ExpressionLabelUtils.LABEL_COOKIE_PREFIX)) {
+				String cookieKey = ExpressionLabelUtils.parseCookieKey(labelKey);
+				if (StringUtils.isBlank(cookieKey)) {
+					continue;
+				}
+				labels.put(labelKey, getCookieValue(request.getCookies(), cookieKey));
+			}
+			else if (StringUtils.equalsIgnoreCase(ExpressionLabelUtils.LABEL_METHOD, labelKey)) {
+				labels.put(labelKey, request.getMethod());
+			}
+			else if (StringUtils.equalsIgnoreCase(ExpressionLabelUtils.LABEL_URI, labelKey)) {
+				labels.put(labelKey, request.getRequestURI());
+			}
+		}
+
+		return labels;
+	}
+
+	public static String getCookieValue(Cookie[] cookies, String key) {
+		if (cookies == null || cookies.length == 0) {
+			return StringUtils.EMPTY;
+		}
+		for (Cookie cookie : cookies) {
+			if (StringUtils.equals(cookie.getName(), key)) {
+				return cookie.getValue();
+			}
+		}
+		return StringUtils.EMPTY;
+	}
+}

spring-cloud-tencent-commons/src/main/java/com/tencent/cloud/common/util/expresstion/SpringWebExpressionLabelUtils.java

@@ -0,0 +1,161 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.common.util.expresstion;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.commons.lang.StringUtils;
+
+import org.springframework.http.HttpCookie;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpRequest;
+import org.springframework.http.server.reactive.ServerHttpRequest;
+import org.springframework.util.CollectionUtils;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.server.ServerWebExchange;
+
+/**
+ * Parse labels from ServerWebExchange and HttpRequest.
+ * @author lepdou 2022-07-11
+ */
+public final class SpringWebExpressionLabelUtils {
+
+	private SpringWebExpressionLabelUtils() {
+	}
+
+	public static Map<String, String> resolve(ServerWebExchange exchange, Set<String> labelKeys) {
+		if (CollectionUtils.isEmpty(labelKeys)) {
+			return Collections.emptyMap();
+		}
+
+		Map<String, String> labels = new HashMap<>();
+
+		for (String labelKey : labelKeys) {
+			if (!ExpressionLabelUtils.isExpressionLabel(labelKey)) {
+				continue;
+			}
+			if (StringUtils.startsWithIgnoreCase(labelKey, ExpressionLabelUtils.LABEL_HEADER_PREFIX)) {
+				String headerKey = ExpressionLabelUtils.parseHeaderKey(labelKey);
+				if (StringUtils.isBlank(headerKey)) {
+					continue;
+				}
+				labels.put(labelKey, getHeaderValue(exchange.getRequest(), headerKey));
+			}
+			else if (StringUtils.startsWithIgnoreCase(labelKey, ExpressionLabelUtils.LABEL_QUERY_PREFIX)) {
+				String queryKey = ExpressionLabelUtils.parseQueryKey(labelKey);
+				if (StringUtils.isBlank(queryKey)) {
+					continue;
+				}
+				labels.put(labelKey, getQueryValue(exchange.getRequest(), queryKey));
+			}
+			else if (StringUtils.startsWithIgnoreCase(labelKey, ExpressionLabelUtils.LABEL_COOKIE_PREFIX)) {
+				String cookieKey = ExpressionLabelUtils.parseCookieKey(labelKey);
+				if (StringUtils.isBlank(cookieKey)) {
+					continue;
+				}
+				labels.put(labelKey, getCookieValue(exchange.getRequest(), cookieKey));
+			}
+			else if (StringUtils.equalsIgnoreCase(ExpressionLabelUtils.LABEL_METHOD, labelKey)) {
+				labels.put(labelKey, exchange.getRequest().getMethodValue());
+			}
+			else if (StringUtils.equalsIgnoreCase(ExpressionLabelUtils.LABEL_URI, labelKey)) {
+				labels.put(labelKey, exchange.getRequest().getURI().getPath());
+			}
+		}
+
+		return labels;
+	}
+
+	public static Map<String, String> resolve(HttpRequest request, Set<String> labelKeys) {
+		if (CollectionUtils.isEmpty(labelKeys)) {
+			return Collections.emptyMap();
+		}
+
+		Map<String, String> labels = new HashMap<>();
+
+		for (String labelKey : labelKeys) {
+			if (!ExpressionLabelUtils.isExpressionLabel(labelKey)) {
+				continue;
+			}
+			if (StringUtils.startsWithIgnoreCase(labelKey, ExpressionLabelUtils.LABEL_HEADER_PREFIX)) {
+				String headerKey = ExpressionLabelUtils.parseHeaderKey(labelKey);
+				if (StringUtils.isBlank(headerKey)) {
+					continue;
+				}
+				labels.put(labelKey, getHeaderValue(request, headerKey));
+			}
+			else if (StringUtils.startsWithIgnoreCase(labelKey, ExpressionLabelUtils.LABEL_QUERY_PREFIX)) {
+				String queryKey = ExpressionLabelUtils.parseQueryKey(labelKey);
+				if (StringUtils.isBlank(queryKey)) {
+					continue;
+				}
+				labels.put(labelKey, getQueryValue(request, queryKey));
+			}
+			else if (StringUtils.equalsIgnoreCase(ExpressionLabelUtils.LABEL_METHOD, labelKey)) {
+				labels.put(labelKey, request.getMethodValue());
+			}
+			else if (StringUtils.equalsIgnoreCase(ExpressionLabelUtils.LABEL_URI, labelKey)) {
+				labels.put(labelKey, request.getURI().getPath());
+			}
+		}
+
+		return labels;
+	}
+
+	public static String getHeaderValue(ServerHttpRequest request, String key) {
+		String value = request.getHeaders().getFirst(key);
+		if (value == null) {
+			return StringUtils.EMPTY;
+		}
+		return value;
+	}
+
+	public static String getQueryValue(ServerHttpRequest request, String key) {
+		MultiValueMap<String, String> queries = request.getQueryParams();
+		if (CollectionUtils.isEmpty(queries)) {
+			return StringUtils.EMPTY;
+		}
+		String value = queries.getFirst(key);
+		if (value == null) {
+			return StringUtils.EMPTY;
+		}
+		return value;
+	}
+
+	public static String getCookieValue(ServerHttpRequest request, String key) {
+		HttpCookie cookie = request.getCookies().getFirst(key);
+		if (cookie == null) {
+			return StringUtils.EMPTY;
+		}
+		return cookie.getValue();
+	}
+
+	public static String getHeaderValue(HttpRequest request, String key) {
+		HttpHeaders headers = request.getHeaders();
+		return headers.getFirst(key);
+	}
+
+	public static String getQueryValue(HttpRequest request, String key) {
+		String query = request.getURI().getQuery();
+		return ExpressionLabelUtils.getQueryValue(query, key);
+	}
+}

spring-cloud-tencent-commons/src/test/java/com/tencent/cloud/common/metadata/config/MetadataAutoConfigurationTest.java

@@ -18,7 +18,6 @@
 
 package com.tencent.cloud.common.metadata.config;
 
-import com.tencent.cloud.common.metadata.filter.gateway.MetadataFirstScgFilter;
 import org.assertj.core.api.Assertions;
 import org.junit.Test;
 
@@ -49,9 +48,6 @@ public class MetadataAutoConfigurationTest {
 				.withConfiguration(AutoConfigurations.of(MetadataAutoConfiguration.class))
 				.run(context -> {
 					Assertions.assertThat(context).hasSingleBean(MetadataLocalProperties.class);
-					Assertions.assertThat(context).hasSingleBean(
-							MetadataAutoConfiguration.MetadataScgFilterConfig.class);
-					Assertions.assertThat(context).hasSingleBean(MetadataFirstScgFilter.class);
 				});
 	}
 
@@ -64,9 +60,6 @@ public class MetadataAutoConfigurationTest {
 				.withConfiguration(AutoConfigurations.of(MetadataAutoConfiguration.class))
 				.run(context -> {
 					Assertions.assertThat(context).hasSingleBean(MetadataLocalProperties.class);
-					Assertions.assertThat(context).hasSingleBean(
-							MetadataAutoConfiguration.MetadataScgFilterConfig.class);
-					Assertions.assertThat(context).hasSingleBean(MetadataFirstScgFilter.class);
 				});
 	}
 
@@ -79,9 +72,6 @@ public class MetadataAutoConfigurationTest {
 				.withConfiguration(AutoConfigurations.of(MetadataAutoConfiguration.class))
 				.run(context -> {
 					Assertions.assertThat(context).hasSingleBean(MetadataLocalProperties.class);
-					Assertions.assertThat(context).hasSingleBean(
-							MetadataAutoConfiguration.MetadataScgFilterConfig.class);
-					Assertions.assertThat(context).hasSingleBean(MetadataFirstScgFilter.class);
 				});
 	}
 }

spring-cloud-tencent-commons/src/test/java/com/tencent/cloud/common/rule/OperationTest.java

@@ -0,0 +1,97 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.common.rule;
+
+import java.util.Arrays;
+import java.util.Collections;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.junit.MockitoJUnitRunner;
+
+/**
+ * Test for {@link Operation}.
+ * @author lepdou 2022-07-12
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class OperationTest {
+
+	@Test
+	public void testEqual() {
+		Assert.assertTrue(Operation.match(Collections.singletonList("v1"), "v1", Operation.EQUALS.getValue()));
+		Assert.assertFalse(Operation.match(Collections.singletonList("v1"), "v2", Operation.EQUALS.getValue()));
+		Assert.assertFalse(Operation.match(Collections.singletonList(""), "v2", Operation.EQUALS.getValue()));
+		Assert.assertFalse(Operation.match(Collections.singletonList("v1"), "", Operation.EQUALS.getValue()));
+		Assert.assertFalse(Operation.match(Collections.singletonList("v1"), null, Operation.EQUALS.getValue()));
+		Assert.assertFalse(Operation.match(Collections.emptyList(), "v1", Operation.EQUALS.getValue()));
+	}
+
+	@Test
+	public void testNotEqual() {
+		Assert.assertFalse(Operation.match(Collections.singletonList("v1"), "v1", Operation.NOT_EQUALS.getValue()));
+		Assert.assertTrue(Operation.match(Collections.singletonList("v1"), "v2", Operation.NOT_EQUALS.getValue()));
+		Assert.assertTrue(Operation.match(Collections.singletonList(""), "v2", Operation.NOT_EQUALS.getValue()));
+		Assert.assertTrue(Operation.match(Collections.singletonList("v1"), "", Operation.NOT_EQUALS.getValue()));
+		Assert.assertTrue(Operation.match(Collections.singletonList("v1"), null, Operation.NOT_EQUALS.getValue()));
+		Assert.assertTrue(Operation.match(Collections.emptyList(), "v1", Operation.NOT_EQUALS.getValue()));
+	}
+
+	@Test
+	public void testIn() {
+		Assert.assertTrue(Operation.match(Arrays.asList("v1", "v2", "v3"), "v1", Operation.IN.getValue()));
+		Assert.assertTrue(Operation.match(Arrays.asList("v1", "v2", "v3"), "v2", Operation.IN.getValue()));
+		Assert.assertFalse(Operation.match(Arrays.asList("v1", "v2", "v3"), "v4", Operation.IN.getValue()));
+		Assert.assertFalse(Operation.match(Arrays.asList("v1", "v2", "v3"), "", Operation.IN.getValue()));
+		Assert.assertFalse(Operation.match(Arrays.asList("v1", "v2", "v3"), null, Operation.IN.getValue()));
+		Assert.assertFalse(Operation.match(Collections.emptyList(), null, Operation.IN.getValue()));
+	}
+
+	@Test
+	public void testNotIn() {
+		Assert.assertFalse(Operation.match(Arrays.asList("v1", "v2", "v3"), "v1", Operation.NOT_IN.getValue()));
+		Assert.assertFalse(Operation.match(Arrays.asList("v1", "v2", "v3"), "v2", Operation.NOT_IN.getValue()));
+		Assert.assertTrue(Operation.match(Arrays.asList("v1", "v2", "v3"), "v4", Operation.NOT_IN.getValue()));
+		Assert.assertTrue(Operation.match(Arrays.asList("v1", "v2", "v3"), "", Operation.NOT_IN.getValue()));
+		Assert.assertTrue(Operation.match(Arrays.asList("v1", "v2", "v3"), null, Operation.NOT_IN.getValue()));
+		Assert.assertTrue(Operation.match(Collections.emptyList(), null, Operation.NOT_IN.getValue()));
+	}
+
+	@Test
+	public void testEmpty() {
+		Assert.assertTrue(Operation.match(Collections.singletonList("v1"), null, Operation.BLANK.getValue()));
+		Assert.assertTrue(Operation.match(Collections.singletonList("v1"), "", Operation.BLANK.getValue()));
+		Assert.assertTrue(Operation.match(Collections.emptyList(), null, Operation.BLANK.getValue()));
+	}
+
+	@Test
+	public void testNotEmpty() {
+		Assert.assertFalse(Operation.match(Collections.singletonList("v1"), null, Operation.NOT_BLANK.getValue()));
+		Assert.assertFalse(Operation.match(Collections.singletonList("v1"), "", Operation.NOT_BLANK.getValue()));
+		Assert.assertFalse(Operation.match(Collections.emptyList(), null, Operation.NOT_BLANK.getValue()));
+		Assert.assertTrue(Operation.match(Collections.emptyList(), "v1", Operation.NOT_BLANK.getValue()));
+	}
+
+	@Test
+	public void testRegex() {
+		Assert.assertTrue(Operation.match(Collections.singletonList("v[1~10]"), "v1", Operation.REGEX.getValue()));
+		Assert.assertFalse(Operation.match(Collections.singletonList("v[1~10]"), "v12", Operation.REGEX.getValue()));
+		Assert.assertFalse(Operation.match(Collections.singletonList("v[1~10]*"), "v12", Operation.REGEX.getValue()));
+	}
+}

spring-cloud-tencent-commons/src/test/java/com/tencent/cloud/common/util/ExpressionLabelUtilsTest.java

@@ -23,6 +23,9 @@ import java.util.Map;
 import java.util.Set;
 
 import com.google.common.collect.Sets;
+import com.tencent.cloud.common.util.expresstion.ExpressionLabelUtils;
+import com.tencent.cloud.common.util.expresstion.ServletExpressionLabelUtils;
+import com.tencent.cloud.common.util.expresstion.SpringWebExpressionLabelUtils;
 import org.junit.Assert;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -105,7 +108,7 @@ public class ExpressionLabelUtilsTest {
 		request.setMethod(HttpMethod.GET.name());
 		request.setRequestURI("/users");
 
-		Map<String, String> result = ExpressionLabelUtils.resolve(request, labelKeys);
+		Map<String, String> result = ServletExpressionLabelUtils.resolve(request, labelKeys);
 
 		Assert.assertEquals("zhangsan", result.get(validLabel1));
 		Assert.assertEquals("zhangsan", result.get(validLabel2));
@@ -149,7 +152,7 @@ public class ExpressionLabelUtilsTest {
 				.cookie(new HttpCookie("uid", "zhangsan")).build();
 		MockServerWebExchange exchange = new MockServerWebExchange.Builder(httpRequest).build();
 
-		Map<String, String> result = ExpressionLabelUtils.resolve(exchange, labelKeys);
+		Map<String, String> result = SpringWebExpressionLabelUtils.resolve(exchange, labelKeys);
 
 		Assert.assertEquals("zhangsan", result.get(validLabel1));
 		Assert.assertEquals("zhangsan", result.get(validLabel2));
@@ -193,7 +196,7 @@ public class ExpressionLabelUtilsTest {
 		request.setURI(URI.create("http://calleeService/user/get?uid=zhangsan"));
 		request.getHeaders().add("uid", "zhangsan");
 
-		Map<String, String> result = ExpressionLabelUtils.resolve(request, labelKeys);
+		Map<String, String> result = SpringWebExpressionLabelUtils.resolve(request, labelKeys);
 
 		Assert.assertEquals("zhangsan", result.get(validLabel1));
 		Assert.assertEquals("zhangsan", result.get(validLabel2));

spring-cloud-tencent-coverage/pom.xml

@@ -69,6 +69,16 @@
 			<artifactId>spring-cloud-starter-tencent-polaris-config</artifactId>
 		</dependency>
 
+		<dependency>
+			<groupId>com.tencent.cloud</groupId>
+			<artifactId>spring-cloud-tencent-featureenv-plugin</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>com.tencent.cloud</groupId>
+			<artifactId>spring-cloud-tencent-gateway-plugin</artifactId>
+		</dependency>
+
 		<dependency>
 			<groupId>com.tencent.cloud</groupId>
 			<artifactId>spring-cloud-tencent-pushgateway-plugin</artifactId>

spring-cloud-tencent-dependencies/pom.xml

@@ -159,6 +159,19 @@
 				<version>${revision}</version>
 			</dependency>
 
+			<!-- spring cloud tencent plugins -->
+			<dependency>
+				<groupId>com.tencent.cloud</groupId>
+				<artifactId>spring-cloud-tencent-featureenv-plugin</artifactId>
+				<version>${revision}</version>
+			</dependency>
+
+			<dependency>
+				<groupId>com.tencent.cloud</groupId>
+				<artifactId>spring-cloud-tencent-gateway-plugin</artifactId>
+				<version>${revision}</version>
+			</dependency>
+
 			<dependency>
 				<groupId>com.tencent.cloud</groupId>
 				<artifactId>spring-cloud-tencent-pushgateway-plugin</artifactId>

spring-cloud-tencent-examples/polaris-gateway-example/gateway-callee-service/pom.xml

@@ -19,6 +19,11 @@
 			<artifactId>spring-cloud-starter-tencent-polaris-discovery</artifactId>
 		</dependency>
 
+		<dependency>
+			<groupId>com.tencent.cloud</groupId>
+			<artifactId>spring-cloud-starter-tencent-metadata-transfer</artifactId>
+		</dependency>
+
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>

spring-cloud-tencent-examples/polaris-gateway-example/gateway-callee-service2/pom.xml

@@ -19,6 +19,11 @@
 			<artifactId>spring-cloud-starter-tencent-polaris-discovery</artifactId>
 		</dependency>
 
+		<dependency>
+			<groupId>com.tencent.cloud</groupId>
+			<artifactId>spring-cloud-starter-tencent-metadata-transfer</artifactId>
+		</dependency>
+		
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>

spring-cloud-tencent-examples/polaris-gateway-example/gateway-scg-service/pom.xml

@@ -29,6 +29,16 @@
 			<artifactId>spring-cloud-starter-tencent-polaris-router</artifactId>
 		</dependency>
 
+		<dependency>
+			<groupId>com.tencent.cloud</groupId>
+			<artifactId>spring-cloud-tencent-gateway-plugin</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>com.tencent.cloud</groupId>
+			<artifactId>spring-cloud-tencent-featureenv-plugin</artifactId>
+		</dependency>
+
 		<dependency>
 			<groupId>org.springframework.cloud</groupId>
 			<artifactId>spring-cloud-starter-gateway</artifactId>

spring-cloud-tencent-examples/polaris-gateway-example/gateway-scg-service/src/main/resources/bootstrap.yml

@@ -6,9 +6,15 @@ spring:
     name: GatewayScgService
   cloud:
     tencent:
-      metadata:
+      plugin:
-        content:
+        scg:
-          a: 1
+          staining:
+            enabled: true
+            rule-staining:
+              enabled: true
+        router:
+          feature-env:
+            enabled: true
     polaris:
       address: grpc://183.47.111.80:8091
       namespace: default

spring-cloud-tencent-examples/polaris-router-featureenv-example/README-zh.md

@@ -0,0 +1,174 @@
+# 多测试环境样例说明
+
+[English](./README.md) | 简体中文
+
+## 一、部署结构
+
+<img src="./imgs/structs.png"/>
+
+如上图所示，一共有三个环境：
+
+1. 基线环境，包含 FrontService、MiddleService、BackendService
+2. feature1 环境，包含 MiddleService、BackendService
+3. feature2 环境，包含 FrontService、BackendService
+
+并且在入口处，部署网关服务。
+
+三条请求链路：
+
+1. 基线环境链路，Gateway -> FrontService(基线) -> MiddleService(基线) -> BackendService(基线)
+2. feature1 环境链路，Gateway -> FrontService(基线) -> MiddleService(feature1) -> BackendService(feature1)
+3. feature2 环境链路，Gateway -> FrontService(feature2) -> MiddleService(基线) -> BackendService(feature2)
+
+## 二、运行样例
+
+无需任何代码变更，直接启动 base、feature1、feature2、featureenv-gateway 下所有应用即可。
+
+应用默认指向北极星官方的体验环境，启动成功后可直接到体验站点查看服务注册数据。
+
+- 管控台地址： http://14.116.241.63:8080/
+    - 账号：polaris
+    - 密码：polaris
+
+## 三、测试
+
+### 方式一：客户端打标
+
+#### 基线环境链路
+
+````
+curl http://127.0.0.1:9999/featureenv-front-example/router/rest
+````
+
+响应结果（base 表示基线环境）
+
+````
+featureenv-front-example[base] -> featureenv-middle-example[base] -> featureenv-backend-example[base]
+````
+
+#### feature1 环境链路
+
+通过 X-Polaris-Metadata-Transitive-featureenv 请求头指定特性环境。
+
+````
+curl -H'X-Polaris-Metadata-Transitive-featureenv:feature1' http://127.0.0.1:9999/featureenv-front-example/router/rest
+````
+
+响应结果
+
+````
+featureenv-front-example[base] -> featureenv-middle-example[feature1] -> featureenv-backend-example[feature1]
+````
+
+#### feature2 环境链路
+
+通过 X-Polaris-Metadata-Transitive-featureenv 请求头指定特性环境。
+
+````
+curl -H'X-Polaris-Metadata-Transitive-featureenv:feature2' http://127.0.0.1:9999/featureenv-front-example/router/rest
+````
+
+响应结果
+
+````
+featureenv-front-example[feature2] -> featureenv-middle-example[base] -> featureenv-backend-example[feature2]
+````
+
+### 方式二：网关流量染色
+
+模拟一种实际的场景，假设客户端请求有一个 uid 请求参数，期望:
+
+1. uid=1000 的请求打到 feature1 环境
+2. uid=2000 的请求打到 feature2 环境
+3. 其它 uid 的请求打到基线环境
+
+**配置染色规则**
+
+配置地址：http://14.116.241.63:8080/#/filegroup-detail?group=featureenv-gateway&namespace=default
+
+修改 rule/staining.json 配置文件，填写以下规则:
+
+````json
+{
+  "rules": [
+    {
+      "conditions": [
+        {
+          "key": "${http.query.uid}",
+          "values": [
+            "1000"
+          ],
+          "operation": "EQUALS"
+        }
+      ],
+      "labels": [
+        {
+          "key": "featureenv",
+          "value": "feature1"
+        }
+      ]
+    },
+    {
+      "conditions": [
+        {
+          "key": "${http.query.uid}",
+          "values": [
+            "2000"
+          ],
+          "operation": "EQUALS"
+        }
+      ],
+      "labels": [
+        {
+          "key": "featureenv",
+          "value": "feature2"
+        }
+      ]
+    }
+  ]
+}
+````
+
+填写完后发布配置即可。
+
+#### 基线环境链路
+
+````
+curl http://127.0.0.1:9999/featureenv-front-example/router/rest?uid=3000
+````
+
+响应结果（base 表示基线环境）
+
+````
+featureenv-front-example[base] -> featureenv-middle-example[base] -> featureenv-backend-example[base]
+````
+
+#### feature1 环境链路
+
+通过 X-Polaris-Metadata-Transitive-featureenv 请求头指定特性环境。
+
+````
+curl http://127.0.0.1:9999/featureenv-front-example/router/rest?uid=1000
+````
+
+响应结果
+
+````
+featureenv-front-example[base] -> featureenv-middle-example[feature1] -> featureenv-backend-example[feature1]
+````
+
+#### feature2 环境链路
+
+通过 X-Polaris-Metadata-Transitive-featureenv 请求头指定特性环境。
+
+````
+curl http://127.0.0.1:9999/featureenv-front-example/router/rest?uid=2000
+````
+
+响应结果
+
+````
+featureenv-front-example[feature2] -> featureenv-middle-example[base] -> featureenv-backend-example[feature2]
+````
+
+

spring-cloud-tencent-examples/polaris-router-featureenv-example/README.md

@@ -0,0 +1,179 @@
+## A Multi-Feature Environment Example
+
+English | [简体中文](./README-zh.md)
+
+## I. Deployment Structure
+
+<img src="./imgs/structs.png" alt="multi-feature environment structure"/>
+
+As shown in the figure above, there are three environments.
+
+1. `baseline` environment, including `FrontService`, `MiddleService`, `BackendService`
+2. `feature1` environment, including `MiddleService`, `BackendService`
+3. `feature2` environment, including `FrontService`, `BackendService`
+
+And at the entrance, deploy the `gateway` service.
+
+Three request links.
+
+1. `baseline` environment link, `Gateway` -> `FrontService`(baseline) -> `MiddleService`(baseline) -> `BackendService`(
+   baseline)
+2. `feature1` environment link, `Gateway` -> `FrontService`(baseline) -> `MiddleService`(feature1) -> `BackendService`(
+   feature1)
+3. `feature2` environment link, `Gateway` -> `FrontService`(feature2) -> `MiddleService`(baseline) -> `BackendService`(
+   feature2)
+
+## II. Running
+
+Without any code changes, just start all the applications under `base`, `feature1`, `feature2`, `featureenv-gateway`
+directly.
+
+By default, the applications point to the official Polaris experience environment, and you can directly view the service
+registration data at the experience site after a successful launch.
+
+- Console address: http://14.116.241.63:8080/
+    - Account：polaris
+    - Password: polaris
+
+## III. Testing
+
+### Mode 1: Client Request With `featureenv` Label
+
+#### `baseline` environment link
+
+````
+curl http://127.0.0.1:9999/featureenv-front-example/router/rest
+````
+
+Response results (base indicates baseline environment)
+
+````
+featureenv-front-example[base] -> featureenv-middle-example[base] -> featureenv-backend-example[base]
+````
+
+#### `feature1` environment link
+
+Specify the feature environment via the `X-Polaris-Metadata-Transitive-featureenv` request header.
+
+````
+curl -H'X-Polaris-Metadata-Transitive-featureenv:feature1' http://127.0.0.1:9999/featureenv-front-example/router/rest
+````
+
+Response results
+
+````
+featureenv-front-example[base] -> featureenv-middle-example[feature1] -> featureenv-backend-example[feature1]
+````
+
+#### `feature2` environment link
+
+Specify the feature environment via the `X-Polaris-Metadata-Transitive-featureenv` request header.
+
+````
+curl -H'X-Polaris-Metadata-Transitive-featureenv:feature2' http://127.0.0.1:9999/featureenv-front-example/router/rest
+````
+
+Response results
+
+````
+featureenv-front-example[feature2] -> featureenv-middle-example[base] -> featureenv-backend-example[feature2]
+````
+
+### Mode 2: Gateway traffic staining
+
+Simulate a real-world scenario, assuming that the client request has a uid request parameter and expects:
+
+1. `uid=1000` requests hit the `feature1` environment
+2. `uid=2000` requests hit the `feature2` environment
+3. requests with other uid hit the `baseline` environment
+
+**Configure coloring rules**
+
+Polaris Configuration Address：http://14.116.241.63:8080/#/filegroup-detail?group=featureenv-gateway&namespace=default
+
+Modify the `rule/staining.json` configuration file and fill in the following rule:
+
+````json
+{
+  "rules": [
+    {
+      "conditions": [
+        {
+          "key": "${http.query.uid}",
+          "values": [
+            "1000"
+          ],
+          "operation": "EQUALS"
+        }
+      ],
+      "labels": [
+        {
+          "key": "featureenv",
+          "value": "feature1"
+        }
+      ]
+    },
+    {
+      "conditions": [
+        {
+          "key": "${http.query.uid}",
+          "values": [
+            "2000"
+          ],
+          "operation": "EQUALS"
+        }
+      ],
+      "labels": [
+        {
+          "key": "featureenv",
+          "value": "feature2"
+        }
+      ]
+    }
+  ]
+}
+````
+
+Just fill out and publish the configuration.
+
+#### `baseline` Environment Link
+
+````
+curl http://127.0.0.1:9999/featureenv-front-example/router/rest?uid=3000
+````
+
+Response results (base indicates baseline environment)
+
+````
+featureenv-front-example[base] -> featureenv-middle-example[base] -> featureenv-backend-example[base]
+````
+
+#### `feature1` Environment Link
+
+Specify the feature environment via the `X-Polaris-Metadata-Transitive-featureenv` request header.
+
+````
+curl http://127.0.0.1:9999/featureenv-front-example/router/rest?uid=1000
+````
+
+Response results
+
+````
+featureenv-front-example[base] -> featureenv-middle-example[feature1] -> featureenv-backend-example[feature1]
+````
+
+#### `feature2` Environment Link
+
+Specify the feature environment via the `X-Polaris-Metadata-Transitive-featureenv` request header.
+
+````
+curl http://127.0.0.1:9999/featureenv-front-example/router/rest?uid=2000
+````
+
+Response results
+
+````
+featureenv-front-example[feature2] -> featureenv-middle-example[base] -> featureenv-backend-example[feature2]
+````
+
+

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/base-backend/pom.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<parent>
+		<artifactId>base</artifactId>
+		<groupId>com.tencent.cloud</groupId>
+		<version>${revision}</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>base-backend</artifactId>
+
+
+</project>

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/base-backend/src/main/java/com/tencent/cloud/polaris/router/featureenv/basebackend/BackendController.java

@@ -0,0 +1,44 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.basebackend;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@RestController
+@RequestMapping("/router")
+public class BackendController {
+
+	@Value("${spring.application.name}")
+	private String appName;
+
+	/**
+	 * Get information of callee.
+	 * @return information of callee
+	 */
+	@GetMapping("/rest")
+	public String rest() {
+		return appName + "[base]";
+	}
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/base-backend/src/main/java/com/tencent/cloud/polaris/router/featureenv/basebackend/BaseBackendApplication.java

@@ -0,0 +1,34 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.basebackend;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@SpringBootApplication
+@EnableFeignClients
+public class BaseBackendApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(BaseBackendApplication.class, args);
+	}
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/base-backend/src/main/resources/bootstrap.yml

@@ -0,0 +1,15 @@
+server:
+  session-timeout: 1800
+  port: 10002
+spring:
+  application:
+    name: featureenv-backend-example
+  cloud:
+    polaris:
+      address: grpc://183.47.111.80:8091
+      namespace: default
+      enabled: true
+logging:
+  level:
+    org.springframework.cloud.gateway: info
+    com.tencent.cloud.polaris: debug

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/base-front/pom.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<parent>
+		<artifactId>base</artifactId>
+		<groupId>com.tencent.cloud</groupId>
+		<version>${revision}</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>base-front</artifactId>
+
+
+</project>

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/base-front/src/main/java/com/tencent/cloud/polaris/router/featureenv/basefront/BaseFrontApplication.java

@@ -0,0 +1,34 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.basefront;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@SpringBootApplication
+@EnableFeignClients
+public class BaseFrontApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(BaseFrontApplication.class, args);
+	}
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/base-front/src/main/java/com/tencent/cloud/polaris/router/featureenv/basefront/FrontController.java

@@ -0,0 +1,51 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.basefront;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@RestController
+@RequestMapping("/router")
+public class FrontController {
+
+	@Value("${spring.application.name}")
+	private String appName;
+
+	@Autowired
+	private MiddleService middleService;
+
+	/**
+	 * Get information of callee.
+	 * @return information of callee
+	 */
+	@GetMapping("/rest")
+	public String rest() {
+		String curName = appName + "[base]";
+		String resp = middleService.rest();
+
+		return curName + " -> " + resp;
+	}
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/base-front/src/main/java/com/tencent/cloud/polaris/router/featureenv/basefront/MiddleService.java

@@ -0,0 +1,33 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.basefront;
+
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.GetMapping;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@FeignClient("featureenv-middle-example")
+public interface MiddleService {
+
+	@GetMapping("/router/rest")
+	String rest();
+
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/base-front/src/main/resources/bootstrap.yml

@@ -0,0 +1,15 @@
+server:
+  session-timeout: 1800
+  port: 10000
+spring:
+  application:
+    name: featureenv-front-example
+  cloud:
+    polaris:
+      address: grpc://183.47.111.80:8091
+      namespace: default
+      enabled: true
+logging:
+  level:
+    org.springframework.cloud.gateway: info
+    com.tencent.cloud.polaris: debug

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/base-middle/pom.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<parent>
+		<artifactId>base</artifactId>
+		<groupId>com.tencent.cloud</groupId>
+		<version>${revision}</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>base-middle</artifactId>
+
+
+
+</project>

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/base-middle/src/main/java/com/tencent/cloud/polaris/router/featureenv/basemiddle/BackendService.java

@@ -0,0 +1,33 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.basemiddle;
+
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.GetMapping;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@FeignClient("featureenv-backend-example")
+public interface BackendService {
+
+	@GetMapping("/router/rest")
+	String rest();
+
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/base-middle/src/main/java/com/tencent/cloud/polaris/router/featureenv/basemiddle/BaseMiddleApplication.java

@@ -0,0 +1,34 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.basemiddle;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@SpringBootApplication
+@EnableFeignClients
+public class BaseMiddleApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(BaseMiddleApplication.class, args);
+	}
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/base-middle/src/main/java/com/tencent/cloud/polaris/router/featureenv/basemiddle/MiddleController.java

@@ -0,0 +1,51 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.basemiddle;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@RestController
+@RequestMapping("/router")
+public class MiddleController {
+
+	@Value("${spring.application.name}")
+	private String appName;
+
+	@Autowired
+	private BackendService backendService;
+
+	/**
+	 * Get information of callee.
+	 * @return information of callee
+	 */
+	@GetMapping("/rest")
+	public String rest() {
+		String curName = appName + "[base]";
+		String resp = backendService.rest();
+
+		return curName + " -> " + resp;
+	}
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/base-middle/src/main/resources/bootstrap.yml

@@ -0,0 +1,15 @@
+server:
+  session-timeout: 1800
+  port: 10001
+spring:
+  application:
+    name: featureenv-middle-example
+  cloud:
+    polaris:
+      address: grpc://183.47.111.80:8091
+      namespace: default
+      enabled: true
+logging:
+  level:
+    org.springframework.cloud.gateway: info
+    com.tencent.cloud.polaris: debug

spring-cloud-tencent-examples/polaris-router-featureenv-example/base/pom.xml

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xmlns="http://maven.apache.org/POM/4.0.0"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<parent>
+		<artifactId>polaris-router-featureenv-example</artifactId>
+		<groupId>com.tencent.cloud</groupId>
+		<version>${revision}</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>base</artifactId>
+	<packaging>pom</packaging>
+
+	<modules>
+		<module>base-front</module>
+		<module>base-middle</module>
+		<module>base-backend</module>
+	</modules>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-openfeign</artifactId>
+		</dependency>
+	</dependencies>
+</project>

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature1/feature1-backend/pom.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<parent>
+		<artifactId>feature1</artifactId>
+		<groupId>com.tencent.cloud</groupId>
+		<version>${revision}</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>feature1-backend</artifactId>
+
+
+</project>

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature1/feature1-backend/src/main/java/com/tencent/cloud/polaris/router/featureenv/feature1backend/BackendController.java

@@ -0,0 +1,51 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.feature1backend;
+
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@RestController
+@RequestMapping("/router")
+public class BackendController {
+
+	@Autowired
+	private StaticMetadataManager staticMetadataManager;
+
+	@Value("${spring.application.name}")
+	private String appName;
+
+	/**
+	 * Get information of callee.
+	 * @return information of callee
+	 */
+	@GetMapping("/rest")
+	public String rest() {
+		String featureEnv = staticMetadataManager.getMergedStaticMetadata().get("featureenv");
+		return appName + "[" + featureEnv + "]";
+	}
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature1/feature1-backend/src/main/java/com/tencent/cloud/polaris/router/featureenv/feature1backend/Feature1BackendApplication.java

@@ -0,0 +1,34 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.feature1backend;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@SpringBootApplication
+@EnableFeignClients
+public class Feature1BackendApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Feature1BackendApplication.class, args);
+	}
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature1/feature1-backend/src/main/resources/bootstrap.yml

@@ -0,0 +1,19 @@
+server:
+  session-timeout: 1800
+  port: 11002
+spring:
+  application:
+    name: featureenv-backend-example
+  cloud:
+    polaris:
+      address: grpc://183.47.111.80:8091
+      namespace: default
+      enabled: true
+    tencent:
+      metadata:
+        content:
+          featureenv: feature1
+logging:
+  level:
+    org.springframework.cloud.gateway: info
+    com.tencent.cloud.polaris: debug

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature1/feature1-middle/pom.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<parent>
+		<artifactId>feature1</artifactId>
+		<groupId>com.tencent.cloud</groupId>
+		<version>${revision}</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>feature1-middle</artifactId>
+
+
+</project>

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature1/feature1-middle/src/main/java/com/tencent/cloud/polaris/router/featureenv/feature1middle/BackendService.java

@@ -0,0 +1,33 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.feature1middle;
+
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.GetMapping;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@FeignClient("featureenv-backend-example")
+public interface BackendService {
+
+	@GetMapping("/router/rest")
+	String rest();
+
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature1/feature1-middle/src/main/java/com/tencent/cloud/polaris/router/featureenv/feature1middle/Feature1MiddleApplication.java

@@ -0,0 +1,34 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.feature1middle;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@SpringBootApplication
+@EnableFeignClients
+public class Feature1MiddleApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Feature1MiddleApplication.class, args);
+	}
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature1/feature1-middle/src/main/java/com/tencent/cloud/polaris/router/featureenv/feature1middle/MiddleController.java

@@ -0,0 +1,58 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.feature1middle;
+
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@RestController
+@RequestMapping("/router")
+public class MiddleController {
+
+	@Value("${spring.application.name}")
+	private String appName;
+
+	@Autowired
+	private BackendService backendService;
+
+	@Autowired
+	private StaticMetadataManager staticMetadataManager;
+
+	/**
+	 * Get information of callee.
+	 * @return information of callee
+	 */
+	@GetMapping("/rest")
+	public String rest() {
+		String featureEnv = staticMetadataManager.getMergedStaticMetadata().get("featureenv");
+
+		String curName = appName + "[" + featureEnv + "]";
+		String resp = backendService.rest();
+
+		return curName + " -> " + resp;
+	}
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature1/feature1-middle/src/main/resources/bootstrap.yml

@@ -0,0 +1,19 @@
+server:
+  session-timeout: 1800
+  port: 11001
+spring:
+  application:
+    name: featureenv-middle-example
+  cloud:
+    polaris:
+      address: grpc://183.47.111.80:8091
+      namespace: default
+      enabled: true
+    tencent:
+      metadata:
+        content:
+          featureenv: feature1
+logging:
+  level:
+    org.springframework.cloud.gateway: info
+    com.tencent.cloud.polaris: debug

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature1/pom.xml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<parent>
+		<artifactId>polaris-router-featureenv-example</artifactId>
+		<groupId>com.tencent.cloud</groupId>
+		<version>${revision}</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>feature1</artifactId>
+	<packaging>pom</packaging>
+
+	<modules>
+		<module>feature1-middle</module>
+		<module>feature1-backend</module>
+	</modules>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-openfeign</artifactId>
+		</dependency>
+	</dependencies>
+</project>

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature2/feature2-backend/pom.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<parent>
+		<artifactId>feature2</artifactId>
+		<groupId>com.tencent.cloud</groupId>
+		<version>${revision}</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>feature2-backend</artifactId>
+
+
+</project>

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature2/feature2-backend/src/main/java/com/tencent/cloud/polaris/router/featureenv/feature2backend/BackendController.java

@@ -0,0 +1,51 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.feature2backend;
+
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@RestController
+@RequestMapping("/router")
+public class BackendController {
+
+	@Autowired
+	private StaticMetadataManager staticMetadataManager;
+
+	@Value("${spring.application.name}")
+	private String appName;
+
+	/**
+	 * Get information of callee.
+	 * @return information of callee
+	 */
+	@GetMapping("/rest")
+	public String rest() {
+		String featureEnv = staticMetadataManager.getMergedStaticMetadata().get("featureenv");
+		return appName + "[" + featureEnv + "]";
+	}
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature2/feature2-backend/src/main/java/com/tencent/cloud/polaris/router/featureenv/feature2backend/Feature2BackendApplication.java

@@ -0,0 +1,34 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.feature2backend;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@SpringBootApplication
+@EnableFeignClients
+public class Feature2BackendApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Feature2BackendApplication.class, args);
+	}
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature2/feature2-backend/src/main/resources/bootstrap.yml

@@ -0,0 +1,19 @@
+server:
+  session-timeout: 1800
+  port: 12002
+spring:
+  application:
+    name: featureenv-backend-example
+  cloud:
+    polaris:
+      address: grpc://183.47.111.80:8091
+      namespace: default
+      enabled: true
+    tencent:
+      metadata:
+        content:
+          featureenv: feature2
+logging:
+  level:
+    org.springframework.cloud.gateway: info
+    com.tencent.cloud.polaris: debug

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature2/feature2-front/pom.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<parent>
+		<artifactId>feature2</artifactId>
+		<groupId>com.tencent.cloud</groupId>
+		<version>${revision}</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>feature2-front</artifactId>
+
+
+
+</project>

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature2/feature2-front/src/main/java/com/tencent/cloud/polaris/router/featureenv/feature2front/Feature2FrontApplication.java

@@ -0,0 +1,34 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.feature2front;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@SpringBootApplication
+@EnableFeignClients
+public class Feature2FrontApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Feature2FrontApplication.class, args);
+	}
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature2/feature2-front/src/main/java/com/tencent/cloud/polaris/router/featureenv/feature2front/FrontController.java

@@ -0,0 +1,58 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.feature2front;
+
+import com.tencent.cloud.common.metadata.StaticMetadataManager;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@RestController
+@RequestMapping("/router")
+public class FrontController {
+
+	@Autowired
+	private StaticMetadataManager staticMetadataManager;
+
+	@Value("${spring.application.name}")
+	private String appName;
+
+	@Autowired
+	private MiddleService middleService;
+
+	/**
+	 * Get information of callee.
+	 * @return information of callee
+	 */
+	@GetMapping("/rest")
+	public String rest() {
+		String featureEnv = staticMetadataManager.getMergedStaticMetadata().get("featureenv");
+
+		String curName = appName + "[" + featureEnv + "]";
+		String resp = middleService.rest();
+
+		return curName + " -> " + resp;
+	}
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature2/feature2-front/src/main/java/com/tencent/cloud/polaris/router/featureenv/feature2front/MiddleService.java

@@ -0,0 +1,33 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.router.featureenv.feature2front;
+
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.GetMapping;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@FeignClient("featureenv-middle-example")
+public interface MiddleService {
+
+	@GetMapping("/router/rest")
+	String rest();
+
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature2/feature2-front/src/main/resources/bootstrap.yml

@@ -0,0 +1,19 @@
+server:
+  session-timeout: 1800
+  port: 12000
+spring:
+  application:
+    name: featureenv-front-example
+  cloud:
+    polaris:
+      address: grpc://183.47.111.80:8091
+      namespace: default
+      enabled: true
+    tencent:
+      metadata:
+        content:
+          featureenv: feature2
+logging:
+  level:
+    org.springframework.cloud.gateway: info
+    com.tencent.cloud.polaris: debug

spring-cloud-tencent-examples/polaris-router-featureenv-example/feature2/pom.xml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<parent>
+		<artifactId>polaris-router-featureenv-example</artifactId>
+		<groupId>com.tencent.cloud</groupId>
+		<version>${revision}</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>feature2</artifactId>
+	<packaging>pom</packaging>
+
+	<modules>
+		<module>feature2-front</module>
+		<module>feature2-backend</module>
+	</modules>
+	
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-openfeign</artifactId>
+		</dependency>
+	</dependencies>
+</project>

spring-cloud-tencent-examples/polaris-router-featureenv-example/featureenv-gateway/pom.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xmlns="http://maven.apache.org/POM/4.0.0"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<parent>
+		<artifactId>polaris-router-featureenv-example</artifactId>
+		<groupId>com.tencent.cloud</groupId>
+		<version>${revision}</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>featureenv-gateway</artifactId>
+
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-gateway</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>com.tencent.cloud</groupId>
+			<artifactId>spring-cloud-tencent-gateway-plugin</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>com.tencent.cloud</groupId>
+			<artifactId>spring-cloud-tencent-featureenv-plugin</artifactId>
+		</dependency>
+	</dependencies>
+</project>

spring-cloud-tencent-examples/polaris-router-featureenv-example/featureenv-gateway/src/main/java/com/tencent/cloud/polaris/featureenv/gateway/FeatureEnvScgApplication.java

@@ -0,0 +1,33 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+
+package com.tencent.cloud.polaris.featureenv.gateway;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @author lepdou 2022-07-20
+ */
+@SpringBootApplication
+public class FeatureEnvScgApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(FeatureEnvScgApplication.class, args);
+	}
+
+}

spring-cloud-tencent-examples/polaris-router-featureenv-example/featureenv-gateway/src/main/resources/bootstrap.yml

@@ -0,0 +1,68 @@
+server:
+  session-timeout: 1800
+  port: 9999
+spring:
+  application:
+    name: featureenv-gateway
+  cloud:
+    tencent:
+      plugin:
+        scg: 
+          staining:
+            enabled: true
+            rule-staining:
+              enabled: true
+        router:
+          feature-env:
+            enabled: true
+    polaris:
+      address: grpc://183.47.111.80:8091
+      namespace: default
+      enabled: true
+    gateway:
+      discovery:
+        locator:
+          enabled: true
+          'predicates[0]':
+            name: Path
+            args:
+              patterns: '''/'' + serviceId + ''/**'''
+          'filters[0]':
+            name: RewritePath
+            args:
+              regexp: '''/'' + serviceId + ''/(?<remaining>.*)'''
+              replacement: '''/$\{remaining}'''
+          'filters[1]':
+            name: Retry
+            args:
+              retries: 3
+              exceptions:
+                '[0]': '''java.net.ConnectException'''
+                '[1]': '''java.io.IOException'''
+              statuses:
+                '[0]': '''BAD_GATEWAY'''
+                '[1]': '''SERVICE_UNAVAILABLE'''
+              series:
+                '[0]': '''CLIENT_ERROR'''
+              methods:
+                '[0]': '''GET'''
+                '[1]': '''POST'''
+                '[2]': '''PUT'''
+                '[3]': '''DELETE'''
+              backoff:
+                firstBackoff: '''100ms'''
+                maxBackoff: '''500ms'''
+                factor: 2
+                basedOnPreviousValue: false
+      routes:
+        - id: featureenv-front-example
+          uri: lb://featureenv-front-example
+          predicates:
+            - Path=/featureenv-front-example/**
+          filters:
+            - StripPrefix=1
+
+logging:
+  level:
+    org.springframework.cloud.gateway: info
+    com.tencent.cloud.polaris: debug

spring-cloud-tencent-examples/polaris-router-featureenv-example/pom.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xmlns="http://maven.apache.org/POM/4.0.0"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<parent>
+		<artifactId>spring-cloud-tencent-examples</artifactId>
+		<groupId>com.tencent.cloud</groupId>
+		<version>${revision}</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>polaris-router-featureenv-example</artifactId>
+	<packaging>pom</packaging>
+
+	<modules>
+		<module>base</module>
+		<module>feature1</module>
+		<module>feature2</module>
+		<module>featureenv-gateway</module>
+	</modules>
+
+	<dependencies>
+		<dependency>
+			<groupId>com.tencent.cloud</groupId>
+			<artifactId>spring-cloud-starter-tencent-polaris-discovery</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>com.tencent.cloud</groupId>
+			<artifactId>spring-cloud-tencent-featureenv-plugin</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-bootstrap</artifactId>
+		</dependency>
+	</dependencies>
+</project>

spring-cloud-tencent-examples/pom.xml

@@ -24,6 +24,7 @@
 		<module>polaris-router-example</module>
 		<module>metadata-transfer-example</module>
 		<module>polaris-router-grayrelease-example</module>
+		<module>polaris-router-featureenv-example</module>
 		<module>polaris-config-data-example</module>
 	</modules>