Add disposable samples .

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

@@ -18,6 +18,7 @@
 
 package com.tencent.cloud.common.metadata;
 
+import java.net.URLEncoder;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Iterator;
@@ -34,7 +35,9 @@ import org.springframework.util.StringUtils;
 import static com.tencent.cloud.common.constant.ContextConstant.UTF_8;
 import static com.tencent.cloud.common.constant.MetadataConstant.INTERNAL_METADATA_DISPOSABLE;
 import static com.tencent.cloud.common.util.JacksonUtils.deserialize2Map;
+import static com.tencent.cloud.common.util.JacksonUtils.serialize2Json;
 import static java.net.URLDecoder.decode;
+import static java.net.URLEncoder.encode;
 
 /**
  * Metadata Context Holder.
@@ -121,11 +124,14 @@ public final class MetadataContextHolder {
 								it.remove();
 							}
 						}
+						// reset
+						dynamicTransitiveMetadata.put(INTERNAL_METADATA_DISPOSABLE, encode(serialize2Json(keyStatus), UTF_8));
 					}
 				}
 				catch (Exception e) {
 					LOGGER.error("Runtime system does not support utf-8 coding.", e);
 				}
+
 			}
 
 			Map<String, String> staticTransitiveMetadata =

spring-cloud-tencent-examples/metadata-transfer-example/metadata-callee-service/src/main/java/com/tencent/cloud/metadata/service/callee/MetadataCallee2Service.java

@@ -0,0 +1,41 @@
+/*
+ * 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.metadata.service.callee;
+
+import java.util.Map;
+
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.GetMapping;
+
+/**
+ * Metadata callee feign client.
+ *
+ * @author Palmer Xu
+ */
+@FeignClient(value = "MetadataCalleeService2",
+		fallback = MetadataCallee2ServiceFallback.class)
+public interface MetadataCallee2Service {
+
+	/**
+	 * Get information of callee.
+	 * @return information of callee
+	 */
+	@GetMapping("/metadata/service/callee2/info")
+	Map<String, String> info();
+
+}

spring-cloud-tencent-examples/metadata-transfer-example/metadata-callee-service/src/main/java/com/tencent/cloud/metadata/service/callee/MetadataCallee2ServiceFallback.java

@@ -0,0 +1,39 @@
+/*
+ * 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.metadata.service.callee;
+
+import java.util.Map;
+
+import com.google.common.collect.Maps;
+
+import org.springframework.stereotype.Component;
+
+/**
+ * Metadata callee feign client fallback.
+ *
+ * @author Palmer Xu
+ */
+@Component
+public class MetadataCallee2ServiceFallback implements MetadataCallee2Service {
+
+	@Override
+	public Map<String, String> info() {
+		return Maps.newHashMap();
+	}
+
+}

spring-cloud-tencent-examples/metadata-transfer-example/metadata-callee-service/src/main/java/com/tencent/cloud/metadata/service/callee/MetadataCalleeController.java

@@ -28,6 +28,7 @@ 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;
+import org.springframework.web.client.RestTemplate;
 
 /**
  * Metadata callee controller.
@@ -43,6 +44,15 @@ public class MetadataCalleeController {
 	@Value("${server.port:0}")
 	private int port;
 
+	private final MetadataCallee2Service metadataCallee2Service;
+
+	private final RestTemplate restTemplate;
+
+	public MetadataCalleeController(MetadataCallee2Service metadataCallee2Service, RestTemplate restTemplate) {
+		this.metadataCallee2Service = metadataCallee2Service;
+		this.restTemplate = restTemplate;
+	}
+
 	/**
 	 * Get information of callee.
 	 * @return information of callee
@@ -51,6 +61,14 @@ public class MetadataCalleeController {
 	public Map<String, String> info() {
 		LOG.info("Metadata Service Callee [{}] is called.", port);
 
+		// Call remote service with RestTemplate
+		Map<String, String> calleeMetadata = restTemplate.getForObject(
+				"http://MetadataCalleeService2/metadata/service/callee2/info",
+				Map.class);
+		calleeMetadata.forEach((key, value) -> {
+			LOG.info("Callee2 Metadata (Key-Value): {} : {}", key, value);
+		});
+
 		// Get Custom Metadata From Context
 		MetadataContext context = MetadataContextHolder.get();
 		Map<String, String> customMetadataMap = context.getFragmentContext(MetadataContext.FRAGMENT_TRANSITIVE);

spring-cloud-tencent-examples/metadata-transfer-example/metadata-callee-service/src/main/java/com/tencent/cloud/metadata/service/callee/MetadataCalleeService.java

@@ -19,6 +19,10 @@ package com.tencent.cloud.metadata.service.callee;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.loadbalancer.LoadBalanced;
+import org.springframework.cloud.openfeign.EnableFeignClients;
+import org.springframework.context.annotation.Bean;
+import org.springframework.web.client.RestTemplate;
 
 /**
  * Metadata callee application.
@@ -26,10 +30,17 @@ import org.springframework.boot.autoconfigure.SpringBootApplication;
  * @author Palmer Xu
  */
 @SpringBootApplication
+@EnableFeignClients
 public class MetadataCalleeService {
 
 	public static void main(String[] args) {
 		SpringApplication.run(MetadataCalleeService.class, args);
 	}
 
+	@Bean
+	@LoadBalanced
+	public RestTemplate restTemplate() {
+		return new RestTemplate();
+	}
+
 }

spring-cloud-tencent-examples/metadata-transfer-example/metadata-callee-service/src/main/resources/bootstrap.yml

@@ -5,9 +5,27 @@ spring:
     name: MetadataCalleeService
   cloud:
     polaris:
-      address: grpc://183.47.111.80:8091
+      address: grpc://127.0.0.1:8091
       namespace: default
       enabled: true
       discovery:
         enabled: true
         register: true
+    tencent:
+      metadata:
+        # Defined your metadata keys & values
+        content:
+          # Example: intransitive
+          CUSTOM-METADATA-KEY-LOCAL-2: CUSTOM-VALUE-LOCAL-2
+          # Example: transitive
+          CUSTOM-METADATA-KEY-TRANSITIVE-2: CUSTOM-VALUE-TRANSITIVE-2
+        # Assigned which metadata key-value will be passed along the link
+        transitive:
+          - CUSTOM-METADATA-KEY-TRANSITIVE-2
+
+management:
+  endpoints:
+    web:
+      exposure:
+        include:
+          - polaris-metadata

spring-cloud-tencent-examples/metadata-transfer-example/metadata-callee-service2/pom.xml

@@ -0,0 +1,51 @@
+<?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>metadata-transfer-example</artifactId>
+        <groupId>com.tencent.cloud</groupId>
+        <version>${revision}</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>metadata-callee-service2</artifactId>
+    <name>Spring Cloud Tencent Metadata Transfer Callee Service 2</name>
+
+    <dependencies>
+		<dependency>
+			<groupId>com.tencent.cloud</groupId>
+			<artifactId>spring-cloud-starter-tencent-polaris-discovery</artifactId>
+		</dependency>
+	</dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>repackage</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-source-plugin</artifactId>
+                <version>3.2.0</version>
+                <executions>
+                    <execution>
+                        <id>attach-sources</id>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

spring-cloud-tencent-examples/metadata-transfer-example/metadata-callee-service2/src/main/java/com/tencent/cloud/metadata/service/callee/MetadataCalleeController.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.metadata.service.callee;
+
+import java.util.Map;
+
+import com.tencent.cloud.common.metadata.MetadataContext;
+import com.tencent.cloud.common.metadata.MetadataContextHolder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+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;
+
+/**
+ * Metadata callee controller.
+ *
+ * @author Palmer Xu
+ */
+@RestController
+@RequestMapping("/metadata/service/callee2")
+public class MetadataCalleeController {
+
+	private static final Logger LOG = LoggerFactory.getLogger(MetadataCalleeController.class);
+
+	@Value("${server.port:0}")
+	private int port;
+
+	/**
+	 * Get information of callee.
+	 * @return information of callee
+	 */
+	@GetMapping("/info")
+	public Map<String, String> info() {
+		LOG.info("Metadata Service Callee-2 [{}] is called.", port);
+
+		// Get Custom Metadata From Context
+		MetadataContext context = MetadataContextHolder.get();
+		Map<String, String> customMetadataMap = context.getFragmentContext(MetadataContext.FRAGMENT_TRANSITIVE);
+
+		customMetadataMap.forEach((key, value) -> {
+			LOG.info("Custom Metadata (Key-Value): {} : {}", key, value);
+		});
+
+		return customMetadataMap;
+	}
+
+}

spring-cloud-tencent-examples/metadata-transfer-example/metadata-callee-service2/src/main/java/com/tencent/cloud/metadata/service/callee/MetadataCalleeService2.java

@@ -0,0 +1,35 @@
+/*
+ * 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.metadata.service.callee;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * Metadata callee application.
+ *
+ * @author Palmer Xu
+ */
+@SpringBootApplication
+public class MetadataCalleeService2 {
+
+	public static void main(String[] args) {
+		SpringApplication.run(MetadataCalleeService2.class, args);
+	}
+
+}

spring-cloud-tencent-examples/metadata-transfer-example/metadata-callee-service2/src/main/resources/bootstrap.yml

@@ -0,0 +1,20 @@
+server:
+  port: 48088
+spring:
+  application:
+    name: MetadataCalleeService2
+  cloud:
+    polaris:
+      address: grpc://127.0.0.1:8091
+      namespace: default
+      enabled: true
+      discovery:
+        enabled: true
+        register: true
+
+management:
+  endpoints:
+    web:
+      exposure:
+        include:
+          - polaris-metadata

spring-cloud-tencent-examples/metadata-transfer-example/metadata-caller-service/src/main/resources/bootstrap.yml

@@ -5,7 +5,7 @@ spring:
     name: MetadataCallerService
   cloud:
     polaris:
-      address: grpc://183.47.111.80:8091
+      address: grpc://127.0.0.1:8091
       namespace: default
       enabled: true
       discovery:
@@ -19,11 +19,16 @@ spring:
         content:
           # Example: intransitive
           CUSTOM-METADATA-KEY-LOCAL: CUSTOM-VALUE-LOCAL
+          #
+          CUSTOM-METADATA-KEY-DISPOSABLE: CUSTOM-VALUE-DISPOSABLE
           # Example: transitive
           CUSTOM-METADATA-KEY-TRANSITIVE: CUSTOM-VALUE-TRANSITIVE
         # Assigned which metadata key-value will be passed along the link
         transitive:
           - CUSTOM-METADATA-KEY-TRANSITIVE
+          - CUSTOM-METADATA-KEY-DISPOSABLE
+        disposable:
+          - CUSTOM-METADATA-KEY-DISPOSABLE
 management:
   endpoints:
     web:

spring-cloud-tencent-examples/metadata-transfer-example/pom.xml

@@ -16,6 +16,7 @@
 
 	<modules>
 		<module>metadata-callee-service</module>
+		<module>metadata-callee-service2</module>
 		<module>metadata-caller-service</module>
 	</modules>