feat: 改成feign调用，支持上报prometheus

spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-backend/src/main/java/com/tencent/cloud/polaris/router/grayrelease/back/BackController.java

@@ -17,21 +17,16 @@
 
 package com.tencent.cloud.polaris.router.grayrelease.back;
 
-import com.tencent.cloud.common.metadata.config.MetadataLocalProperties;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.core.env.Environment;
 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;
 
 @RestController
 @RequestMapping("/router/gray")
 public class BackController {
 
-	@Autowired
-	private RestTemplate restTemplate;
-
 	@Autowired
 	private Environment environment;
 

spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-frontend/src/main/java/com/tencent/cloud/polaris/router/grayrelease/front/FrontController.java

@@ -18,23 +18,21 @@
 
 package com.tencent.cloud.polaris.router.grayrelease.front;
 
-import com.tencent.cloud.common.metadata.config.MetadataLocalProperties;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.core.env.Environment;
 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;
 
 @RestController
 @RequestMapping("/router/gray")
 public class FrontController {
 
 	@Autowired
-	private RestTemplate restTemplate;
+	private Environment environment;
 
 	@Autowired
-	private Environment environment;
+	private RouterService routerService;
 
 	/**
 	 * Get information of callee.
@@ -45,7 +43,7 @@ public class FrontController {
 		String env = System.getenv("SCT_METADATA_CONTENT_env");
 		String appName = environment.getProperty("spring.application.name");
 		String curName = appName + "[" + env + "]";
-		String resp = restTemplate.getForObject("http://gray-release-middle/router/gray/rest", String.class);
+		String resp = routerService.rest();
 		return curName + " -> " + resp;
 	}
 }

spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-frontend/src/main/java/com/tencent/cloud/polaris/router/grayrelease/front/GrayReleaseFrontApplication.java

@@ -20,20 +20,13 @@ package com.tencent.cloud.polaris.router.grayrelease.front;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
-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;
 
 @SpringBootApplication
 @EnableDiscoveryClient
+@EnableFeignClients
 public class GrayReleaseFrontApplication {
 
-	@Bean
-	@LoadBalanced
-	public RestTemplate restTemplate() {
-		return new RestTemplate();
-	}
-
 	public static void main(String[] args) {
 		SpringApplication.run(GrayReleaseFrontApplication.class, args);
 	}

spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-frontend/src/main/java/com/tencent/cloud/polaris/router/grayrelease/front/RouterService.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.polaris.router.grayrelease.front;
+
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.GetMapping;
+
+/**
+ * Router callee feign client.
+ *
+ * @author lepdou 2022-04-06
+ */
+@FeignClient("gray-release-middle")
+public interface RouterService {
+
+	@GetMapping("/router/gray/rest")
+	String rest();
+
+}

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

@@ -13,6 +13,11 @@
 	<artifactId>router-grayrelease-gateway</artifactId>
 
 	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
 		<dependency>
 			<artifactId>spring-cloud-starter-tencent-polaris-discovery</artifactId>
 			<groupId>com.tencent.cloud</groupId>
@@ -37,11 +42,6 @@
 			<groupId>com.tencent.cloud</groupId>
 			<artifactId>spring-cloud-starter-tencent-metadata-transfer</artifactId>
 		</dependency>
-
-		<dependency>
-			<groupId>org.springframework.cloud</groupId>
-			<artifactId>spring-cloud-starter-gateway</artifactId>
-		</dependency>
 	</dependencies>
 
 	<build>

spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-gateway/src/main/java/com/tencent/cloud/polaris/router/grayrelease/gateway/GatewayController.java

@@ -23,17 +23,16 @@ import org.springframework.core.env.Environment;
 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;
 
 @RestController
 @RequestMapping("/router/gray")
 public class GatewayController {
 
 	@Autowired
-	private RestTemplate restTemplate;
+	private Environment environment;
 
 	@Autowired
-	private Environment environment;
+	private RouterService routerService;
 
 	/**
 	 * Get information of callee.
@@ -42,7 +41,7 @@ public class GatewayController {
 	@GetMapping("/entry")
 	public String rest() {
 		String appName = environment.getProperty("spring.application.name");
-		String resp = restTemplate.getForObject("http://gray-release-front/router/gray/rest", String.class);
+		String resp = routerService.rest();
 		return appName + " -> " + resp;
 	}
 }

spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-gateway/src/main/java/com/tencent/cloud/polaris/router/grayrelease/gateway/GrayReleaseGatewayApplication.java

@@ -20,20 +20,13 @@ package com.tencent.cloud.polaris.router.grayrelease.gateway;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
-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;
 
 @SpringBootApplication
 @EnableDiscoveryClient
+@EnableFeignClients
 public class GrayReleaseGatewayApplication {
 
-	@Bean
-	@LoadBalanced
-	public RestTemplate restTemplate() {
-		return new RestTemplate();
-	}
-
 	public static void main(String[] args) {
 		SpringApplication.run(GrayReleaseGatewayApplication.class, args);
 	}

spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-gateway/src/main/java/com/tencent/cloud/polaris/router/grayrelease/gateway/RouterService.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.grayrelease.gateway;
+
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestParam;
+
+/**
+ * Router callee feign client.
+ *
+ * @author lepdou 2022-04-06
+ */
+@FeignClient("gray-release-front")
+public interface RouterService {
+
+	@GetMapping("/router/gray/rest")
+	String rest();
+
+}

spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-middle/src/main/java/com/tencent/cloud/polaris/router/grayrelease/middle/GrayReleaseMiddleApplication.java

@@ -20,20 +20,13 @@ package com.tencent.cloud.polaris.router.grayrelease.middle;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
-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;
 
 @SpringBootApplication
 @EnableDiscoveryClient
+@EnableFeignClients
 public class GrayReleaseMiddleApplication {
 
-	@Bean
-	@LoadBalanced
-	public RestTemplate restTemplate() {
-		return new RestTemplate();
-	}
-
 	public static void main(String[] args) {
 		SpringApplication.run(GrayReleaseMiddleApplication.class, args);
 	}

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

@@ -18,23 +18,21 @@
 
 package com.tencent.cloud.polaris.router.grayrelease.middle;
 
-import com.tencent.cloud.common.metadata.config.MetadataLocalProperties;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.core.env.Environment;
 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;
 
 @RestController
 @RequestMapping("/router/gray")
 public class MiddleController {
 
 	@Autowired
-	private RestTemplate restTemplate;
+	private Environment environment;
 
 	@Autowired
-	private Environment environment;
+	private RouterService routerService;
 
 	/**
 	 * Get information of callee.
@@ -45,7 +43,7 @@ public class MiddleController {
 		String env = System.getenv("SCT_METADATA_CONTENT_env");
 		String appName = environment.getProperty("spring.application.name");
 		String curName = appName + "[" + env + "]";
-		String resp = restTemplate.getForObject("http://gray-release-back/router/gray/rest", String.class);
+		String resp = routerService.rest();
 		return curName + " -> " + resp;
 	}
 }

spring-cloud-tencent-examples/polaris-router-grayrelease-example/router-grayrelease-middle/src/main/java/com/tencent/cloud/polaris/router/grayrelease/middle/RouterService.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.polaris.router.grayrelease.middle;
+
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.GetMapping;
+
+/**
+ * Router callee feign client.
+ *
+ * @author lepdou 2022-04-06
+ */
+@FeignClient("gray-release-back")
+public interface RouterService {
+
+	@GetMapping("/router/gray/rest")
+	String rest();
+
+}