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增加 Hystrix 入门文章

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YunaiV
2020-05-15 08:17:55 +08:00
parent 93992e8815
commit f8949f61d6
9 changed files with 233 additions and 2 deletions
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57
lab-57/lab-57-hystrix-demo01/pom.xml Normal file
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<?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>lab-57</artifactId>
<groupId>cn.iocoder.springboot.labs</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>lab-57-hystrix-demo01</artifactId>
<properties>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.source>1.8</maven.compiler.source>
<spring.boot.version>2.2.4.RELEASE</spring.boot.version>
</properties>
<!--
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。
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
-->
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>${spring.boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<!-- 引入 SpringMVC 相关依赖，并实现对其的自动配置 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 引入 Hystrix 依赖 -->
<dependency>
<groupId>com.netflix.hystrix</groupId>
<artifactId>hystrix-core</artifactId>
<version>1.5.18</version>
</dependency>
<dependency>
<groupId>com.netflix.hystrix</groupId>
<artifactId>hystrix-javanica</artifactId>
<version>1.5.18</version>
</dependency>
</dependencies>
</project>

20
lab-57/lab-57-hystrix-demo01/src/main/java/cn/iocoder/springboot/lab57/hystrixdemo/DemoApplication.java Normal file
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package cn.iocoder.springboot.lab57.hystrixdemo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
@SpringBootApplication
public class DemoApplication {
@Bean
public RestTemplate restTemplate() {
return new RestTemplate();
}
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}

17
lab-57/lab-57-hystrix-demo01/src/main/java/cn/iocoder/springboot/lab57/hystrixdemo/config/HystrixConfig.java Normal file
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package cn.iocoder.springboot.lab57.hystrixdemo.config;
import com.netflix.hystrix.contrib.javanica.aop.aspectj.HystrixCommandAspect;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
@Configuration
@EnableAspectJAutoProxy
public class HystrixConfig {
@Bean
public HystrixCommandAspect hystrixCommandAspect() {
return new HystrixCommandAspect();
}
}

35
lab-57/lab-57-hystrix-demo01/src/main/java/cn/iocoder/springboot/lab57/hystrixdemo/controller/DemoController.java Normal file
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package cn.iocoder.springboot.lab57.hystrixdemo.controller;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import org.apache.commons.lang.exception.ExceptionUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
@RestController
@RequestMapping("/demo")
public class DemoController {
private Logger logger = LoggerFactory.getLogger(getClass());
@Autowired
private RestTemplate restTemplate;
@GetMapping("/get_user")
@HystrixCommand(fallbackMethod = "getUserFallback")
public String getUser(@RequestParam("id") Integer id) {
logger.info("[getUser][准备调用 user-service 获取用户({})详情]", id);
return restTemplate.getForEntity("http://127.0.0.1:18080/user/get?id=" + id, String.class).getBody();
}
public String getUserFallback(Integer id, Throwable throwable) {
logger.info("[getUserFallback][id({}) exception({})]", id, ExceptionUtils.getRootCauseMessage(throwable));
return "mock:User:" + id;
}
}

44
lab-57/lab-57-user-service/pom.xml Normal file
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<?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>lab-57</artifactId>
<groupId>cn.iocoder.springboot.labs</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>lab-57-user-service</artifactId>
<properties>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.source>1.8</maven.compiler.source>
<spring.boot.version>2.2.4.RELEASE</spring.boot.version>
</properties>
<!--
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。
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
-->
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>${spring.boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<!-- 引入 SpringMVC 相关依赖，并实现对其的自动配置 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
</project>

40
lab-57/lab-57-user-service/src/main/java/cn/iocoder/springboot/lab57/userservice/UserServiceApplication.java Normal file
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package cn.iocoder.springboot.lab57.userservice;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
import java.util.stream.Collectors;
@SpringBootApplication
public class UserServiceApplication {
@RestController
@RequestMapping("/user")
public class UserController {
@GetMapping("/get")
public String get(@RequestParam("id") Integer id) {
return "User:" + id;
}
@GetMapping("/batch_get")
public List<String> batchGet(@RequestParam("ids") List<Integer> ids) {
return ids.stream().map(id -> "User:" + id).collect(Collectors.toList());
}
}
public static void main(String[] args) {
// 设置端口
System.setProperty("server.port", "18080");
// 应用启动
SpringApplication.run(UserServiceApplication.class, args);
}
}

19
lab-57/pom.xml Normal file
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@@ -0,0 +1,19 @@
<?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>labs-parent</artifactId>
<groupId>cn.iocoder.springboot.labs</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>lab-57</artifactId>
<packaging>pom</packaging>
<modules>
<module>lab-57-user-service</module>
<module>lab-57-hystrix-demo01</module>
</modules>
</project>

2
labx-23/labx-23-user-service/pom.xml
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@@ -15,7 +15,6 @@
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.source>1.8</maven.compiler.source>
<spring.boot.version>2.2.4.RELEASE</spring.boot.version>
<spring.cloud.version>Hoxton.SR1</spring.cloud.version>
</properties>
<!--
@@ -42,5 +41,4 @@
</dependency>
</dependencies>
</project>

1
pom.xml
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@@ -92,6 +92,7 @@
<!-- <module>labx-21</module>-->
<!-- <module>labx-22</module>-->
<!-- <module>labx-23</module>-->
<module>lab-57</module>
</modules>
</project>