SpringCloud 2.x学习笔记：10、断路器监控(Hystrix Dashboard)（Greenwich版本）

悠悠 2022-10-02 11:44 281阅读 0赞

## 1、断路器监控(Hystrix Dashboard) ##

Hystrix 已经停止开发了，Hystrix 官方推荐替代的开源组件：Resilience4j（感觉学不动啦）  
除了 Resilience4j，还有Spring Cloud Alibaba作为替代组件，首个版本Spring Cloud for Alibaba 0.2.0

现在 Spring Boot 有两条线，即 Spring Boot 1.x 和 Spring Boot 2.x，
    所以 0.2.0 即是和 Spring Boot 2.x 兼容的，0.1.0 则是和 Spring Boot 1.x 兼容的

## 2、 hystrix-dashboard模块 ##

### 2.1 pom.xml ###

<?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">
        <modelVersion>4.0.0</modelVersion>
        <groupId>com.cntaiping.tpa</groupId>
        <artifactId>hystrix-dashboard</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>
        <name>hystrix-dashboard</name>
        <description>Demo project for Spring Boot</description>
    
        <parent>
            <groupId>com.cntaiping.tpa</groupId>
            <artifactId>cloud</artifactId>
            <version>1.0-SNAPSHOT</version>
        </parent>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            </dependency>
            <dependency>
                <groupId>com.netflix.hystrix</groupId>
                <artifactId>hystrix-javanica</artifactId>
                <version>RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-netflix-hystrix-dashboard</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
            </dependency>
        </dependencies>
    
    </project>

### 2.2 application.properties ###

#服务名称
    spring.application.name=consumer-hystrix
    #端口号
    server.port=8505
    #在注册中心中进行注册
    eureka.client.serviceUrl.defaultZone=http://localhost:8800/eureka/

### 2.3 Application类 ###

package com.cntaiping.tpa.hystrixdashboard;
    
    import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.boot.web.servlet.ServletRegistrationBean;
    import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.netflix.hystrix.EnableHystrix;
    import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    @Configuration
    @SpringBootApplication
    @EnableDiscoveryClient
    @EnableHystrixDashboard
    @EnableHystrix
    @EnableCircuitBreaker
    public class HystrixDashboardApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(HystrixDashboardApplication.class, args);
        }
    
        @Bean
        public ServletRegistrationBean<HystrixMetricsStreamServlet> getServlet(){
            HystrixMetricsStreamServlet hystrixMetricsStreamServlet = new HystrixMetricsStreamServlet();
            ServletRegistrationBean<HystrixMetricsStreamServlet> servletRegistrationBean = new ServletRegistrationBean();
            servletRegistrationBean.setServlet(hystrixMetricsStreamServlet);
            servletRegistrationBean.addUrlMappings("/hystrix.stream");
            servletRegistrationBean.setName("HystrixMetricsStreamServlet");
            return servletRegistrationBean;
        }
    }

### 2.4 控制器 ###

package com.cntaiping.tpa.hystrixdashboard.controller;
    
    import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class MessageController {
        @Value("${server.port}")
        String port;
    
        @RequestMapping("/hi")
        @HystrixCommand(fallbackMethod = "hiError")
        public String hello(@RequestParam("name") String name) {
            return "hi " + name + " ,i am from port:" + port;
        }
    
        public String hiError(String name) {
            return "hi,"+name+",sorry,error!";
        }
    
    }

### 2.5 运行效果 ###

依次运行服务注册中心register-server模块和断路器监控hystrix-dashboard模块  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5neXVxaWFuZw_size_16_color_FFFFFF_t_70]

[http://localhost:8506/hi?name=chengyq][http_localhost_8506_hi_name_chengyq]  
![在这里插入图片描述][20190618191329407.png]  
[http://localhost:8506/hystrix.stream][http_localhost_8506_hystrix.stream]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5neXVxaWFuZw_size_16_color_FFFFFF_t_70 1]  
[http://localhost:8506/hystrix][http_localhost_8506_hystrix]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5neXVxaWFuZw_size_16_color_FFFFFF_t_70 2]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5neXVxaWFuZw_size_16_color_FFFFFF_t_70 3]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5neXVxaWFuZw_size_16_color_FFFFFF_t_70]: /images/20220112/37930023362641f396b9b7a7e36e5294.png
[http_localhost_8506_hi_name_chengyq]: http://localhost:8506/hi?name=chengyq
[20190618191329407.png]: /images/20220112/f0222555a6a6476eadbf28a2ca2f3409.png
[http_localhost_8506_hystrix.stream]: http://localhost:8506/hystrix.stream
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5neXVxaWFuZw_size_16_color_FFFFFF_t_70 1]: /images/20220112/c2f6275d516540158d076933fd671da2.png
[http_localhost_8506_hystrix]: http://localhost:8506/hystrix
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5neXVxaWFuZw_size_16_color_FFFFFF_t_70 2]: /images/20220112/7ddb709b20b142e4bb0551e76a02fff0.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5neXVxaWFuZw_size_16_color_FFFFFF_t_70 3]: /images/20220112/446c6fd3471e4777b0e51bcbfabb65bf.png