1五、Feign整合斷路器監控Hystrix Dashboard

公衆號： java樂園

Ribbon能夠整合整合斷路器監控Hystrix Dashboard，Feign也不能少, 本篇講解一下Feign如何整合斷路器監控Hystrix Dashboard。本篇主要整合sc-eureka-client-consumer-feign-hystrix項目和sc-hystrix-dashboard項目。

一、新建項目sc-feign-hystrix-dashboard，對應的pom.xml文件以下

<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>
    
        <!-- 說明是一個 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>

說明：能夠看出這個pom.xml文件是sc-eureka-client-consumer-feign-hystrix項目和sc-hystrix-dashboard項目的並集。

二、新建spring root 啓動類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
@EnableHystrixDashboard
public class FeignDashboardApplication {
    
    public static void main(String[] args) {
        SpringApplication.run(FeignDashboardApplication.class, args);
    }

}

這個啓動類的註解是sc-eureka-client-consumer-feign-hystrix項目和sc-hystrix-dashboard項目的並集
三、其餘項目文件說明以下，具體見源碼

四、啓動註冊中心sc-eureka-server和服務提供者sc-eureka-client-provider，並確保啓動成功

五、啓動sc-feign-hystrix-dashboard項目，並驗證是否啓動成功
方式一：訪問註冊中心查看sc-feign-hystrix-dashboard項目配置的服務名是否註冊成功

方式二：訪問儀表盤Dashboard對的地址http://127.0.0.1:5800/hystrix

六、使用Hystrix Dashboard查看服務狀況
在下圖標註處輸入http://127.0.0.1:5800/hystrix.stream

而後點擊Monitor Stream按鈕

七、使用postman訪問任意服務接口，以訪問獲取用戶信息接口爲例
http://127.0.0.1:5800/feign/user/getUser/3

儘可能多訪問幾回，而後查看儀表盤Bashboard監控後臺，發現以前一直處於Loading的界面發生了變化，以下圖，圖中單元具體含義能夠訪問網站
https://github.com/Netflix-Sk...

訪問http://127.0.0.1:5800/hystrix.stream也出現大量數據，這些數據就是對服務的監控數據。