Spingcloud-hystrix DashBoard 打开hystrix.stream出现404的问题

系统管理员 2020-11-15 14:06 1530阅读 1赞

## 错误描述： ##

在打开DashBoard 监控视图的时候出现404，如下：

> ashboardConfiguration$ProxyStreamServlet : Failed opening connection  
> to http://localhost:7001/actuator/hystrix.stream?delay=2000 : 404 :  
> HTTP/1.1 404

## 解决方法： ##

> 注入ServletRegistrationBean 这个bean即可；

package com.warrior.hiservice;
    
    import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
    import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;
    import org.springframework.beans.factory.annotation.Value;
    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.eureka.EnableEurekaClient;
    import org.springframework.cloud.netflix.hystrix.EnableHystrix;
    import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
    import org.springframework.context.annotation.Bean;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.RestController;
    
    @SpringBootApplication
    @EnableEurekaClient
    @EnableDiscoveryClient
    @RestController
    @EnableHystrix
    @EnableHystrixDashboard
    public class HiServiceApplication { 
    
    
        public static void main(String[] args) { 
            SpringApplication.run( HiServiceApplication.class, args );
        }
    
    
        @RequestMapping("/hi")
        @HystrixCommand(fallbackMethod = "hiError") //设置断路点
        public String home(String name) { 
            if(name==null||name.isEmpty()){ 
                int i=1/0;
            }
            return "hi ," + name ;
        }
    
        //错误时调用这个
        public String hiError(String name) { 
            return "name不能为空";
        }
    
    
        //这个bean主要是解决/hystrix.stream视图无法打开的问题；
        @Bean
        public ServletRegistrationBean getServlet(){ 
            HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
            ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
            registrationBean.setLoadOnStartup(1);
            registrationBean.addUrlMappings("/hystrix.stream");
            registrationBean.setName("HystrixMetricsStreamServlet");
            return registrationBean;
        }
    
    }