Merge pull request #85 from lepdou/2020/optimize_demo

optimize example

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

@@ -4,21 +4,24 @@
 
 本样例将介绍如何在Spring Cloud项目中使用```spring-cloud-starter-tencent-polaris-circuitbreaker```以使用其各项功能。
 
-该样例分为两个微服务，即polaris-circuitbreaker-example-a和polaris-circuitbreaker-example-b。其中，polaris-circuitbreaker-example-a对polaris-circuitbreaker-example-b发生调用。
+该样例分为两个微服务，即 
+
+1. ```polaris-circuitbreaker-example-a``` 
+2. ```polaris-circuitbreaker-example-b``` 有两个实例 B（默认正常服务）和 B2（模拟异常服务）
+
+``` polaris-circuitbreaker-example-a``` 对 ```polaris-circuitbreaker-example-b```发生调用。
 
 ## 使用说明
 
 ### 修改配置
 
-配置如下所示。其中，${ip}和${port}为Polaris后端服务的IP地址与端口号。
+修改 resource/bootstrap.yml 中北极星的服务端地址
 
 ```yaml
 spring:
-  application:
-    name: ${application.name}
   cloud:
     polaris:
-      address: ${ip}:${port}
+       address: grpc://${ip}:8091
 ```
 
 ### 启动样例
@@ -27,40 +30,20 @@ spring:
 
 参考[Polaris Getting Started](https://github.com/PolarisMesh/polaris#getting-started)。
 
-#### 启动应用
+### 启动应用
 
-注意，由于需要验证熔断功能，因此需要部署两个及以上的被调服务（样例中部署两个即可）。
 - IDEA启动
 
-分别启动```spring-cloud-tencent-examples/polaris-circuitbreaker-example/polaris-circuitbreaker-example-a```下的```ServiceA```和```spring-cloud-tencent-examples/polaris-circuitbreaker-example/polaris-circuitbreaker-example-b```下的```ServiceB```。
+分别启动
-
-注意，ServiceB需要启动两个。同机器上可以修改端口号来实现。
 
-两个ServiceB的com.tencent.cloud.polaris.circuitbreaker.example.ServiceBController.info的逻辑需不同，即一个正常返回一个抛出异常。
+1. ```spring-cloud-tencent-examples/polaris-circuitbreaker-example/polaris-circuitbreaker-example-a```下的```ServiceA```
+2. ```spring-cloud-tencent-examples/polaris-circuitbreaker-example/polaris-circuitbreaker-example-b```下的```ServiceB```
+3. ```spring-cloud-tencent-examples/polaris-circuitbreaker-example/polaris-circuitbreaker-example-b2```下的```ServiceB2```
 
-- Maven打包启动
 
-在```spring-cloud-tencent-examples/polaris-discovery-example```下执行
+## 验证
 
-注意，ServiceB需要启动两个。同机器上可以修改端口号来实现。
+### Feign调用
-
-两个ServiceB的com.tencent.cloud.polaris.circuitbreaker.example.ServiceBController.info的逻辑需不同，即一个正常返回一个抛出异常。
-
-```sh
-mvn clean package
-```
-
-然后在```polaris-circuitbreaker-example-a```和```polaris-circuitbreaker-example-b```下找到生成的jar包，运行
-
-```
-java -jar ${app.jar}
-```
-
-启动应用，其中${app.jar}替换为对应的jar包名。
-
-### 验证
-
-#### Feign调用
 
 执行以下命令发起Feign调用，其逻辑为```ServiceB```抛出一个异常
 
@@ -72,7 +55,18 @@ curl -L -X GET 'localhost:48080/example/service/a/getBServiceInfo'
 
 在出现
 ```
-trigger the refuse for service b
+hello world ! I'm a service B1
 ```            
-时，表示请求到有异常的ServiceB，需要熔断这个实例。后面的所有请求都会得到正常返回。
+
+时，表示 B2 已经被熔断了，请求只会打到 B1。
+
+### 验证更多场景
+
+您也可以调整 ```example-b``` 和 ```example-b2``` 中 ```resource/bootstrap.yml``` is-throw-runtime-exception
+参数调整服务是否抛出异常。
+
+例如测试以下场景：
+1. 两个实例都是正常的，这时候预期是 B1 和 B2 都能正常被调用到
+2. 一个实例正常一个实例不正常，这时候预期是不正常实例被熔断，请求只会打到正常的实例
+3. 两个实例都不正常，这时候 Feign 会自动 Fallback 到 ProviderBFallback.java 的实现类
 

spring-cloud-tencent-examples/polaris-circuitbreaker-example/polaris-circuitbreaker-example-b/src/main/java/com/tencent/cloud/polaris/circuitbreaker/example/ServiceBController.java

@@ -13,6 +13,7 @@
  * 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.circuitbreaker.example;
@@ -44,7 +45,7 @@ public class ServiceBController {
 			throw new RuntimeException("failed for call my service");
 		}
 		else {
-			return "hello world ! I'm a service B";
+			return "hello world ! I'm a service B1";
 		}
 	}
 

spring-cloud-tencent-examples/polaris-circuitbreaker-example/polaris-circuitbreaker-example-b2/pom.xml

@@ -0,0 +1,51 @@
+<?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-circuitbreaker-example</artifactId>
+		<groupId>com.tencent.cloud</groupId>
+		<version>${revision}</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>polaris-circuitbreaker-example-b2</artifactId>
+
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-webflux</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/polaris-circuitbreaker-example/polaris-circuitbreaker-example-b2/src/main/java/com/tencent/cloud/polaris/ciruitbreaker/example/ServiceB2.java

@@ -0,0 +1,36 @@
+/*
+ * 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.ciruitbreaker.example;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * Circuit breaker example callee application.
+ *
+ * @author Haotian Zhang
+ */
+@SpringBootApplication
+public class ServiceB2 {
+
+	public static void main(String[] args) {
+		SpringApplication.run(ServiceB2.class);
+	}
+
+}

spring-cloud-tencent-examples/polaris-circuitbreaker-example/polaris-circuitbreaker-example-b2/src/main/java/com/tencent/cloud/polaris/ciruitbreaker/example/ServiceBController.java

@@ -0,0 +1,52 @@
+/*
+ * 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.ciruitbreaker.example;
+
+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;
+
+/**
+ * Service B Controller.
+ *
+ * @author Haotian Zhang
+ */
+@RestController
+@RequestMapping("/example/service/b")
+public class ServiceBController {
+
+	@Value("${is-throw-runtime-exception:#{false}}")
+	private boolean isThrowRuntimeException;
+
+	/**
+	 * Get service information.
+	 * @return service information
+	 */
+	@GetMapping("/info")
+	public String info() {
+		if (isThrowRuntimeException) {
+			throw new RuntimeException("failed for call my service");
+		}
+		else {
+			return "hello world ! I'm a service B2";
+		}
+	}
+
+}

spring-cloud-tencent-examples/polaris-circuitbreaker-example/polaris-circuitbreaker-example-b2/src/main/resources/bootstrap.yml

@@ -0,0 +1,10 @@
+server:
+  port: 48082
+spring:
+  application:
+    name: polaris-circuitbreaker-example-b
+  cloud:
+    polaris:
+      address: grpc://9.134.122.18:8091
+      namespace: default
+is-throw-runtime-exception: true

spring-cloud-tencent-examples/polaris-circuitbreaker-example/pom.xml

@@ -17,6 +17,7 @@
 	<modules>
 		<module>polaris-circuitbreaker-example-a</module>
 		<module>polaris-circuitbreaker-example-b</module>
+		<module>polaris-circuitbreaker-example-b2</module>
 	</modules>
 
 	<dependencies>

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

@@ -2,6 +2,7 @@
 
 ## 1. bootstrap.yml 配置
 
+修改 resources/bootstrap.yml ```spring.cloud.polaris.config.address``` 北极星服务端地址。
 > 注意是在 bootstrap.yml 里配置，而不是在 application.yml 里配置。因为配置中心相关的配置是在 bootstrap 阶段依赖的配置。
 
 ```` yaml
@@ -12,7 +13,7 @@ spring:
     polaris:
       namespace: dev
       config:
-        addresses: grpc://9.134.122.18:8093 # the address of polaris config server
+        address: grpc://9.134.122.18:8093 # the address of polaris config server
         auto-refresh: true # auto refresh when config file changed
         groups:
           - name: ${spring.application.name} # group name

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

@@ -4,21 +4,20 @@
 
 本样例将介绍如何在Spring Cloud项目中使用```spring-cloud-starter-tencent-polaris-discovery```以使用其各项功能。
 
-该样例分为两个微服务，即discovery-caller-service和discovery-callee-service。其中，discovery-caller-service对discovery-callee-service发生调用。
+该样例分为两个微服务，即 ```discovery-caller-service``` 和 ```discovery-callee-service ```。
+其中 ```discovery-caller-service``` 调用 ```discovery-callee-service```
 
 ## 使用说明
 
 ### 修改配置
 
-配置如下所示。其中，${ip}和${port}为Polaris后端服务的IP地址与端口号。
+修改 resource/bootstrap.yml 中北极星的服务端地址
 
 ```yaml
 spring:
-  application:
-    name: ${application.name}
   cloud:
     polaris:
-      address: ${ip}:${port}
+      address: grpc://${ip}:8091
 ```
 
 ### 启动样例
@@ -31,27 +30,14 @@ spring:
 
 - IDEA启动
 
-分别启动```spring-cloud-tencent-examples/polaris-discovery-example/discovery-caller-service```下的```DiscoveryCallerService```和```spring-cloud-tencent-examples/polaris-discovery-example/discovery-callee-service```下的```DiscoveryCalleeService```。
+分别启动
 
-- Maven打包启动
+1. ```spring-cloud-tencent-examples/polaris-discovery-example/discovery-caller-service```下的```DiscoveryCallerService```
-
+2. ```spring-cloud-tencent-examples/polaris-discovery-example/discovery-callee-service```下的```DiscoveryCalleeService```
-在```spring-cloud-tencent-examples/polaris-discovery-example```下执行
-
-```sh
-mvn clean package
-```
-
-然后在```discovery-caller-service```和```discovery-callee-service```下找到生成的jar包，运行
-
-```
-java -jar ${app.jar}
-```
-
-启动应用，其中${app.jar}替换为对应的jar包名。
 
 ### 验证
 
-#### Feign调用
+#### 调用 discovery-caller-service 暴露的接口
 
 执行以下命令发起Feign调用，其逻辑为```DiscoveryCalleeService```返回 value1+value2 的和
 

spring-cloud-tencent-examples/polaris-ratelimit-example/ratelimit-callee-service/src/main/resources/rule.json

@@ -1,19 +0,0 @@
-{
-  "service": "RateLimitCalleeService",
-  "namespace": "Production",
-  "priority": 0,
-  "resource": "QPS",
-  "type": "LOCAL",
-  "labels": {
-    "method": {
-      "value": "/business/invoke"
-    }
-  },
-  "amounts": [
-    {
-      "maxAmount": 10,
-      "validDuration": "1s"
-    }
-  ],
-  "action": "REJECT"
-}