optimize example

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lepdou 3 years ago
parent b70a8a6949
commit bd94ef095f

@ -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```。
注意ServiceB需要启动两个。同机器上可以修改端口号来实现。
分别启动
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。
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
### 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
```
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

@ -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";
}
}

@ -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>

@ -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);
}
}

@ -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";
}
}
}

@ -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

@ -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>

@ -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

@ -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
@ -31,29 +30,16 @@ 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
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。
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```
### 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
执行以下命令发起Feign调用其逻辑为```DiscoveryCalleeService```返回 value1+value2 的和
```shell
curl -L -X GET 'http://localhost:48080/discovery/service/caller/feign?value1=1&value2=2'

@ -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"
}
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