微服务和VUE(25): 微服务之Hystrix-dashboard

Posted 2021-04-16 拂袖烟雨

tags:

篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了微服务和VUE(25): 微服务之Hystrix-dashboard相关的知识，希望对你有一定的参考价值。

1. 前言

当我们开发了很多微服务，编写了很多接口，使用过程中，我们需要有个工具来实时监控这个接口的使用情况，保存请求数量，发生错误数量等。这个时候我们就需要Hystrix-dashboard。

2. 什么是Hystrix-dashboard

Hystrix-dashboard是一款针对Hystrix进行实时监控的工具，通过Hystrix Dashboard我们可以在直观地看到各Hystrix Command的请求响应时间, 请求成功率等数据。

3. 代码编写

3.1 对my-student的修改

修改StuApplication.java文件

加入这段代码

@Bean
public ServletRegistrationBean getSerlet(){
    HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
    ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
    registrationBean.setLoadOnStartup(1);
    registrationBean.addUrlMappings("/actuator/hystrix.stream");
    registrationBean.setName("HystrixMetricsStreamServlet");
    return registrationBean;
}

完整的启动文件如下：

package com.student;

@SpringBootApplication
@EnableEurekaClient
@EnableScheduling   //启动Scheduled定时任务机制
@EnableFeignClients

@EnableCircuitBreaker
@MapperScan("com.student.dao")
public class StuApplication {
    public static void main(String[] args) {
        SpringApplication.run(StuApplication.class);
    }

    @Bean
    public ServletRegistrationBean getSerlet(){
        HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
        ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
        registrationBean.setLoadOnStartup(1);
        registrationBean.addUrlMappings("/actuator/hystrix.stream");
        registrationBean.setName("HystrixMetricsStreamServlet");
        return registrationBean;
    }
}

3.2 新建my-hystrixDashboard微服务

3.2.1 引入依赖

除了

<artifactId>spring-boot-starter-web</artifactId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
<artifactId>spring-cloud-starter-config</artifactId>
<artifactId>spring-cloud-starter-netflix-hystrix</artifactId>

hystrixDashboard需要引入两个新的依赖

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

3.2.2 编写配置文件my-histrixDashboard-dev.yml

#配置端口号
server:
  port: 8806

#注册到注册中心
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8801/eureka/

# 开启熔断
feign:
  hystrix:
    enable: true

3.2.3 编写HystrixDashboardApp.java

package com.hystrixdashboard;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;

@SpringBootApplication
@EnableDiscoveryClient
@EnableHystrixDashboard
public class HystrixDashboardApp {
    public static void main(String[] args) {
        SpringApplication.run(HystrixDashboardApp.class);
    }
}