feat: support custom nacos instance weight

spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/extend/nacos/NacosConfigModifier.java

@@ -34,6 +34,16 @@ import com.tencent.polaris.factory.config.provider.RegisterConfigImpl;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import static com.alibaba.nacos.api.PropertyKeyConst.CONTEXT_PATH;
+import static com.alibaba.nacos.api.PropertyKeyConst.NAMESPACE;
+import static com.alibaba.nacos.api.PropertyKeyConst.PASSWORD;
+import static com.alibaba.nacos.api.PropertyKeyConst.USERNAME;
+import static com.tencent.polaris.plugins.connector.common.constant.NacosConstant.MetadataMapKey.NACOS_CLUSTER_KEY;
+import static com.tencent.polaris.plugins.connector.common.constant.NacosConstant.MetadataMapKey.NACOS_EPHEMERAL_KEY;
+import static com.tencent.polaris.plugins.connector.common.constant.NacosConstant.MetadataMapKey.NACOS_GROUP_KEY;
+import static com.tencent.polaris.plugins.connector.common.constant.NacosConstant.MetadataMapKey.NACOS_SERVICE_KEY;
+import static com.tencent.polaris.plugins.connector.common.constant.NacosConstant.MetadataMapKey.NACOS_WEIGHT_KEY;
+
 
 /**
  * {@link PolarisConfigModifier} impl of Nacos.
@@ -42,38 +52,7 @@ import org.slf4j.LoggerFactory;
  */
 public class NacosConfigModifier implements PolarisConfigModifier {
 
-	/**
-	 * nacos username.
-	 */
-	public static final String USERNAME = "username";
-	/**
-	 * nacos password.
-	 */
-	public static final String PASSWORD = "password";
-	/**
-	 * nacos contextPath.
-	 */
-	public static final String CONTEXT_PATH = "contextPath";
-	/**
-	 * nacos namespace.
-	 */
-	public static final String NAMESPACE = "namespace";
-	/**
-	 * nacos group.
-	 */
-	public static final String NACOS_GROUP = "nacos.group";
-	/**
-	 * nacos service.
-	 */
-	public static final String NACOS_SERVICE = "nacos.service";
-	/**
-	 * nacos cluster.
-	 */
-	public static final String NACOS_CLUSTER = "nacos.cluster";
-	/**
-	 * nacos ephemeral.
-	 */
-	public static final String NACOS_EPHEMERAL = "nacos.ephemeral";
+
 	private static final Logger LOGGER = LoggerFactory.getLogger(NacosConfigModifier.class);
 	private static final String ID = "nacos";
 	private final NacosContextProperties nacosContextProperties;
@@ -139,15 +118,16 @@ public class NacosConfigModifier implements PolarisConfigModifier {
 		}
 
 		if (StringUtils.isNotBlank(nacosContextProperties.getGroup())) {
-			metadata.put(NACOS_GROUP, nacosContextProperties.getGroup());
+			metadata.put(NACOS_GROUP_KEY, nacosContextProperties.getGroup());
 		}
 		if (StringUtils.isNotBlank(nacosContextProperties.getClusterName())) {
-			metadata.put(NACOS_CLUSTER, nacosContextProperties.getClusterName());
+			metadata.put(NACOS_CLUSTER_KEY, nacosContextProperties.getClusterName());
 		}
 		if (StringUtils.isNotBlank(nacosContextProperties.getServiceName())) {
-			metadata.put(NACOS_SERVICE, nacosContextProperties.getServiceName());
+			metadata.put(NACOS_SERVICE_KEY, nacosContextProperties.getServiceName());
 		}
-		metadata.put(NACOS_EPHEMERAL, String.valueOf(nacosContextProperties.isEphemeral()));
+		metadata.put(NACOS_EPHEMERAL_KEY, String.valueOf(nacosContextProperties.isEphemeral()));
+		metadata.put(NACOS_WEIGHT_KEY, String.valueOf(nacosContextProperties.getWeight()));
 		configuration.getGlobal().getServerConnectors().add(serverConnectorConfig);
 		DiscoveryConfigImpl discoveryConfig = new DiscoveryConfigImpl();
 		discoveryConfig.setServerConnectorId(ID);

spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/extend/nacos/NacosContextProperties.java

@@ -100,6 +100,9 @@ public class NacosContextProperties {
 	@Value("${spring.cloud.nacos.discovery.namespace:public}")
 	private String namespace = DEFAULT_NAMESPACE;
 
+	@Value("${spring.cloud.nacos.discovery.weight:1.0}")
+	private double weight = 1.0;
+
 	private String contextPath;
 
 	public boolean isEnabled() {
@@ -197,6 +200,14 @@ public class NacosContextProperties {
 		this.serviceName = serviceName;
 	}
 
+	double getWeight() {
+		return weight;
+	}
+
+	void setWeight(double weight) {
+		this.weight = weight;
+	}
+
 	@Override
 	public String toString() {
 		return "NacosContextProperties{" +
@@ -204,12 +215,14 @@ public class NacosContextProperties {
 				", discoveryEnabled=" + discoveryEnabled +
 				", registerEnabled=" + registerEnabled +
 				", serverAddr='" + serverAddr + '\'' +
+				", ephemeral=" + ephemeral +
 				", username='" + username + '\'' +
 				", serviceName='" + serviceName + '\'' +
 				", password='" + password + '\'' +
 				", clusterName='" + clusterName + '\'' +
 				", group='" + group + '\'' +
 				", namespace='" + namespace + '\'' +
+				", weight=" + weight +
 				", contextPath='" + contextPath + '\'' +
 				'}';
 	}

spring-cloud-starter-tencent-polaris-discovery/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -118,7 +118,13 @@
       "name": "spring.cloud.nacos.discovery.ephemeral",
       "type": "java.lang.Boolean",
       "sourceType": "com.tencent.cloud.polaris.extend.nacos.NacosContextProperties",
-      "defaultValue": false
+      "defaultValue": true
+    },
+    {
+      "name": "spring.cloud.nacos.discovery.weight",
+      "type": "java.lang.Double",
+      "sourceType": "com.tencent.cloud.polaris.extend.nacos.NacosContextProperties",
+      "defaultValue": 1.0
     },
     {
       "name": "spring.cloud.nacos.discovery.group",