springcloud(10)-断路器监控

1.创建hystrix-dashboard子项目

2.添加pom.xml包

<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>
  <parent>
    <groupId>com.zhangdemo</groupId>
    <artifactId>springcloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>productServiceHystrixDashboard</artifactId>

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

  </dependencies>

</project>

3.ProductServiceHystrixDashboardApplication

@SpringBootApplication
@EnableHystrixDashboard
public class ProductServiceHystrixDashboardApplication {
    public static void main(String[] args) {
        int port = 8020;
        if(!NetUtil.isUsableLocalPort(port)) {
            System.err.printf("端口%d被占用了，无法启动%n", port );
            System.exit(1);
        }
        new SpringApplicationBuilder(ProductServiceHystrixDashboardApplication.class).properties("server.port=" + port).run(args);

    }

}

4.配置文件修改：

spring:
  application:
    name: hystrix-dashboard

5.ProductViewServiceFeignApplication增加 @EnableCircuitBreaker注解

6.AccessViewService类进行访问：

public class AccessViewService {

    public static void main(String[] args) {

        while(true) {
            ThreadUtil.sleep(1000);
            try {
                String html= HttpUtil.get("http://127.0.0.1:8012/products");
                System.out.println("html length:" + html.length());
            }
            catch(Exception e) {
                System.err.println(e.getMessage());
            }

        }

    }
}

7.测试

（1打开http://localhost:8020/hystrix

（2输入： http://localhost:8012/actuator/hystrix.stream

（3点击[Monitor Stream]

(4看到如下页面