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YunaiV
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增加 Hystrix 入门文章
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9 files changed

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‎lab-57/lab-57-hystrix-demo01/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>lab-57</artifactId>
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<groupId>cn.iocoder.springboot.labs</groupId>
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<version>1.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>lab-57-hystrix-demo01</artifactId>
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<properties>
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<maven.compiler.target>1.8</maven.compiler.target>
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<maven.compiler.source>1.8</maven.compiler.source>
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<spring.boot.version>2.2.4.RELEASE</spring.boot.version>
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</properties>
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<!--
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引入 Spring Boot、Spring Cloud、Spring Cloud Alibaba 三者 BOM 文件，进行依赖版本的管理，防止不兼容。
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在 https://dwz.cn/mcLIfNKt 文章中，Spring Cloud Alibaba 开发团队推荐了三者的依赖关系
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-->
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>${spring.boot.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<dependencies>
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<!-- 引入 SpringMVC 相关依赖，并实现对其的自动配置 -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<!-- 引入 Hystrix 依赖 -->
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<dependency>
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<groupId>com.netflix.hystrix</groupId>
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<artifactId>hystrix-core</artifactId>
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<version>1.5.18</version>
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</dependency>
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<dependency>
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<groupId>com.netflix.hystrix</groupId>
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<artifactId>hystrix-javanica</artifactId>
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<version>1.5.18</version>
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</dependency>
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</dependencies>
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</project>

‎lab-57/lab-57-hystrix-demo01/src/main/java/cn/iocoder/springboot/lab57/hystrixdemo/DemoApplication.java

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package cn.iocoder.springboot.lab57.hystrixdemo;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.context.annotation.Bean;
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import org.springframework.web.client.RestTemplate;
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@SpringBootApplication
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public class DemoApplication {
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@Bean
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public RestTemplate restTemplate() {
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return new RestTemplate();
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}
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public static void main(String[] args) {
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SpringApplication.run(DemoApplication.class, args);
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}
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}

‎lab-57/lab-57-hystrix-demo01/src/main/java/cn/iocoder/springboot/lab57/hystrixdemo/config/HystrixConfig.java

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package cn.iocoder.springboot.lab57.hystrixdemo.config;
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import com.netflix.hystrix.contrib.javanica.aop.aspectj.HystrixCommandAspect;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.context.annotation.EnableAspectJAutoProxy;
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@Configuration
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@EnableAspectJAutoProxy
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public class HystrixConfig {
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@Bean
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public HystrixCommandAspect hystrixCommandAspect() {
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return new HystrixCommandAspect();
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}
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}

‎lab-57/lab-57-hystrix-demo01/src/main/java/cn/iocoder/springboot/lab57/hystrixdemo/controller/DemoController.java

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package cn.iocoder.springboot.lab57.hystrixdemo.controller;
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import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
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import org.apache.commons.lang.exception.ExceptionUtils;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestParam;
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import org.springframework.web.bind.annotation.RestController;
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import org.springframework.web.client.RestTemplate;
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@RestController
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@RequestMapping("/demo")
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public class DemoController {
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private Logger logger = LoggerFactory.getLogger(getClass());
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@Autowired
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private RestTemplate restTemplate;
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@GetMapping("/get_user")
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@HystrixCommand(fallbackMethod = "getUserFallback")
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public String getUser(@RequestParam("id") Integer id) {
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logger.info("[getUser][准备调用 user-service 获取用户({})详情]", id);
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return restTemplate.getForEntity("http://127.0.0.1:18080/user/get?id=" + id, String.class).getBody();
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}
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public String getUserFallback(Integer id, Throwable throwable) {
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logger.info("[getUserFallback][id({}) exception({})]", id, ExceptionUtils.getRootCauseMessage(throwable));
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return "mock:User:" + id;
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}
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}

‎lab-57/lab-57-user-service/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>lab-57</artifactId>
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<groupId>cn.iocoder.springboot.labs</groupId>
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<version>1.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>lab-57-user-service</artifactId>
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<properties>
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<maven.compiler.target>1.8</maven.compiler.target>
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<maven.compiler.source>1.8</maven.compiler.source>
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<spring.boot.version>2.2.4.RELEASE</spring.boot.version>
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</properties>
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<!--
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引入 Spring Boot、Spring Cloud、Spring Cloud Alibaba 三者 BOM 文件，进行依赖版本的管理，防止不兼容。
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在 https://dwz.cn/mcLIfNKt 文章中，Spring Cloud Alibaba 开发团队推荐了三者的依赖关系
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-->
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>${spring.boot.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<dependencies>
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<!-- 引入 SpringMVC 相关依赖，并实现对其的自动配置 -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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</dependencies>
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</project>

‎lab-57/lab-57-user-service/src/main/java/cn/iocoder/springboot/lab57/userservice/UserServiceApplication.java

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package cn.iocoder.springboot.lab57.userservice;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestParam;
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import org.springframework.web.bind.annotation.RestController;
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import java.util.List;
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import java.util.stream.Collectors;
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@SpringBootApplication
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public class UserServiceApplication {
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@RestController
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@RequestMapping("/user")
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public class UserController {
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@GetMapping("/get")
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public String get(@RequestParam("id") Integer id) {
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return "User:" + id;
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}
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@GetMapping("/batch_get")
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public List<String> batchGet(@RequestParam("ids") List<Integer> ids) {
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return ids.stream().map(id -> "User:" + id).collect(Collectors.toList());
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}
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}
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public static void main(String[] args) {
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// 设置端口
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System.setProperty("server.port", "18080");
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// 应用启动
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SpringApplication.run(UserServiceApplication.class, args);
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}
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}

‎lab-57/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>labs-parent</artifactId>
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<groupId>cn.iocoder.springboot.labs</groupId>
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<version>1.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>lab-57</artifactId>
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<packaging>pom</packaging>
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<modules>
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<module>lab-57-user-service</module>
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<module>lab-57-hystrix-demo01</module>
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</modules>
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</project>

‎labx-23/labx-23-user-service/pom.xml

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<maven.compiler.target>1.8</maven.compiler.target>
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<maven.compiler.source>1.8</maven.compiler.source>
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<spring.boot.version>2.2.4.RELEASE</spring.boot.version>
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<spring.cloud.version>Hoxton.SR1</spring.cloud.version>
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</properties>
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<!--
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</dependency>
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</dependencies>
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</project>

‎pom.xml

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<!-- <module>labx-21</module>-->
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<!-- <module>labx-22</module>-->
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<!-- <module>labx-23</module>-->
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<module>lab-57</module>
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</modules>
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</project>

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