15Feign整合断路器监控Hystrix-Dashboard

公众号： java乐园

Ribbon可以整合整合断路器监控Hystrix Dashboard，Feign也不能少, 本篇讲解一下Feign如何整合断路器监控Hystrix Dashboard。本篇主要整合sc-eureka-client-consumer-feign-hystrix项目和sc-hystrix-dashboard项目。

1、新建项目sc-feign-hystrix-dashboard，对应的pom.xml文件如下

<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>spring-cloud</groupId>  <artifactId>sc-feign-hystrix-dashboard</artifactId>  <version>0.0.1-SNAPSHOT</version>  <packaging>jar</packaging>  <name>sc-feign-hystrix-dashboard</name>  <url>http://maven.apache.org</url>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>2.0.4.RELEASE</version>    </parent>    <dependencyManagement>        <dependencies>            <dependency>                <groupId>org.springframework.cloud</groupId>                <artifactId>spring-cloud-dependencies</artifactId>                <version>Finchley.RELEASE</version>                <type>pom</type>                <scope>import</scope>            </dependency>        </dependencies>    </dependencyManagement>    <properties>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>        <maven.compiler.source>1.8</maven.compiler.source>        <maven.compiler.target>1.8</maven.compiler.target>    </properties>    <dependencies>            <!-- 说明是一个 eureka client -->        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>                <!-- <dependency>                 <groupId>org.springframework.cloud</groupId>                 <artifactId>spring-cloud-starter-feign</artifactId>                 <version>1.4.5.RELEASE</version>            </dependency> -->        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-openfeign</artifactId>        </dependency>                        <!-- <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>            <version>1.4.5.RELEASE</version>        </dependency> -->        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>        </dependency>        <!-- <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-hystrix</artifactId>            <version>1.4.5.RELEASE</version>        </dependency> -->                <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>        </dependency>                    <dependency>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-actuator</artifactId>    </dependency>            </dependencies></project>

说明：可以看出这个pom.xml文件是sc-eureka-client-consumer-feign-hystrix项目和sc-hystrix-dashboard项目的并集。

2、新建spring root 启动类FeignDashboardApplication.java

package sc.consumer;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.cloud.netflix.eureka.EnableEurekaClient;import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;import org.springframework.cloud.openfeign.EnableFeignClients;@SpringBootApplication@EnableEurekaClient@EnableFeignClients@EnableHystrixDashboardpublic class FeignDashboardApplication {        public static void main(String[] args) {        SpringApplication.run(FeignDashboardApplication.class, args);    }}

这个启动类的注解是sc-eureka-client-consumer-feign-hystrix项目和sc-hystrix-dashboard项目的并集
3、其他项目文件说明如下，具体见源码

4、启动注册中心sc-eureka-server和服务提供者sc-eureka-client-provider，并确保启动成功

5、启动sc-feign-hystrix-dashboard项目，并验证是否启动成功
方式一：访问注册中心查看sc-feign-hystrix-dashboard项目配置的服务名是否注册成功

方式二：访问仪表盘Dashboard对的地址http://127.0.0.1:5800/hystrix

6、使用Hystrix Dashboard查看服务情况
在下图标注处输入http://127.0.0.1:5800/hystrix.stream

然后点击Monitor Stream按钮

7、使用postman访问任意服务接口，以访问获取用户信息接口为例
http://127.0.0.1:5800/feign/user/getUser/3

尽量多访问几次，然后查看仪表盘Bashboard监控后台，发现之前一直处于Loading的界面发生了变化，如下图，图中单元具体含义可以访问网站
https://github.com/Netflix-Sk...

访问http://127.0.0.1:5800/hystrix.stream也出现大量数据，这些数据就是对服务的监控数据。