support spring-retry router (#633)
lepdou
2 years ago
committed by
GitHub
parent
4e88462d83
commit
62d7f9c448
@ -0,0 +1,150 @@
|
||||
/*
|
||||
* 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.resttemplate;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.io.UnsupportedEncodingException;
|
||||
import java.net.URI;
|
||||
import java.net.URLEncoder;
|
||||
import java.util.Collections;
|
||||
import java.util.Comparator;
|
||||
import java.util.HashMap;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
import java.util.Set;
|
||||
|
||||
import com.tencent.cloud.common.constant.RouterConstants;
|
||||
import com.tencent.cloud.common.metadata.MetadataContext;
|
||||
import com.tencent.cloud.common.metadata.MetadataContextHolder;
|
||||
import com.tencent.cloud.common.metadata.StaticMetadataManager;
|
||||
import com.tencent.cloud.common.util.JacksonUtils;
|
||||
import com.tencent.cloud.common.util.expresstion.SpringWebExpressionLabelUtils;
|
||||
import com.tencent.cloud.polaris.router.RouterRuleLabelResolver;
|
||||
import com.tencent.cloud.polaris.router.spi.SpringWebRouterLabelResolver;
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
|
||||
import org.springframework.core.Ordered;
|
||||
import org.springframework.http.HttpRequest;
|
||||
import org.springframework.http.client.ClientHttpRequestExecution;
|
||||
import org.springframework.http.client.ClientHttpRequestInterceptor;
|
||||
import org.springframework.http.client.ClientHttpResponse;
|
||||
import org.springframework.lang.NonNull;
|
||||
import org.springframework.util.Assert;
|
||||
import org.springframework.util.CollectionUtils;
|
||||
|
||||
import static com.tencent.cloud.common.constant.ContextConstant.UTF_8;
|
||||
|
||||
/**
|
||||
* Interceptor used for adding the route label in http headers from context when web client
|
||||
* is RestTemplate.
|
||||
*
|
||||
* @author liuye 2022-09-14
|
||||
*/
|
||||
public class RouterLabelRestTemplateInterceptor implements ClientHttpRequestInterceptor, Ordered {
|
||||
private static final Logger LOGGER = LoggerFactory.getLogger(RouterLabelRestTemplateInterceptor.class);
|
||||
|
||||
private final List<SpringWebRouterLabelResolver> routerLabelResolvers;
|
||||
private final StaticMetadataManager staticMetadataManager;
|
||||
private final RouterRuleLabelResolver routerRuleLabelResolver;
|
||||
|
||||
public RouterLabelRestTemplateInterceptor(List<SpringWebRouterLabelResolver> routerLabelResolvers,
|
||||
StaticMetadataManager staticMetadataManager,
|
||||
RouterRuleLabelResolver routerRuleLabelResolver) {
|
||||
this.staticMetadataManager = staticMetadataManager;
|
||||
this.routerRuleLabelResolver = routerRuleLabelResolver;
|
||||
|
||||
if (!CollectionUtils.isEmpty(routerLabelResolvers)) {
|
||||
routerLabelResolvers.sort(Comparator.comparingInt(Ordered::getOrder));
|
||||
this.routerLabelResolvers = routerLabelResolvers;
|
||||
}
|
||||
else {
|
||||
this.routerLabelResolvers = null;
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public int getOrder() {
|
||||
return Ordered.LOWEST_PRECEDENCE;
|
||||
}
|
||||
|
||||
@Override
|
||||
public ClientHttpResponse intercept(@NonNull HttpRequest request, @NonNull byte[] body,
|
||||
@NonNull ClientHttpRequestExecution clientHttpRequestExecution) throws IOException {
|
||||
final URI originalUri = request.getURI();
|
||||
String peerServiceName = originalUri.getHost();
|
||||
Assert.state(peerServiceName != null,
|
||||
"Request URI does not contain a valid hostname: " + originalUri);
|
||||
|
||||
setLabelsToHeaders(request, body, peerServiceName);
|
||||
|
||||
return clientHttpRequestExecution.execute(request, body);
|
||||
}
|
||||
|
||||
void setLabelsToHeaders(HttpRequest request, byte[] body, String peerServiceName) {
|
||||
// local service labels
|
||||
Map<String, String> labels = new HashMap<>(staticMetadataManager.getMergedStaticMetadata());
|
||||
|
||||
// labels from rule expression
|
||||
Set<String> expressionLabelKeys = routerRuleLabelResolver.getExpressionLabelKeys(MetadataContext.LOCAL_NAMESPACE,
|
||||
MetadataContext.LOCAL_SERVICE, peerServiceName);
|
||||
|
||||
Map<String, String> ruleExpressionLabels = getExpressionLabels(request, expressionLabelKeys);
|
||||
if (!CollectionUtils.isEmpty(ruleExpressionLabels)) {
|
||||
labels.putAll(ruleExpressionLabels);
|
||||
}
|
||||
|
||||
// labels from request
|
||||
if (!CollectionUtils.isEmpty(routerLabelResolvers)) {
|
||||
routerLabelResolvers.forEach(resolver -> {
|
||||
try {
|
||||
Map<String, String> customResolvedLabels = resolver.resolve(request, body, expressionLabelKeys);
|
||||
if (!CollectionUtils.isEmpty(customResolvedLabels)) {
|
||||
labels.putAll(customResolvedLabels);
|
||||
}
|
||||
}
|
||||
catch (Throwable t) {
|
||||
LOGGER.error("[SCT][Router] revoke RouterLabelResolver occur some exception. ", t);
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
// labels from downstream
|
||||
Map<String, String> transitiveLabels = MetadataContextHolder.get()
|
||||
.getFragmentContext(MetadataContext.FRAGMENT_TRANSITIVE);
|
||||
labels.putAll(transitiveLabels);
|
||||
|
||||
// pass label by header
|
||||
String encodedLabelsContent;
|
||||
try {
|
||||
encodedLabelsContent = URLEncoder.encode(JacksonUtils.serialize2Json(labels), UTF_8);
|
||||
}
|
||||
catch (UnsupportedEncodingException e) {
|
||||
throw new RuntimeException("unsupported charset exception " + UTF_8);
|
||||
}
|
||||
request.getHeaders().set(RouterConstants.ROUTER_LABEL_HEADER, encodedLabelsContent);
|
||||
}
|
||||
|
||||
private Map<String, String> getExpressionLabels(HttpRequest request, Set<String> labelKeys) {
|
||||
if (CollectionUtils.isEmpty(labelKeys)) {
|
||||
return Collections.emptyMap();
|
||||
}
|
||||
|
||||
return SpringWebExpressionLabelUtils.resolve(request, labelKeys);
|
||||
}
|
||||
}
|
||||
Loading…
Reference in new issue