1.继承feign和ribbon
2.ribbon服务修改内容
新增依赖pom.xml:
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-hystrix</artifactId> </dependency>
3.在启动类增加注解:@EnableHystrix
4.修改service类,增加断路返回:
@Service public class HelloService { @Autowired RestTemplate restTemplate; @HystrixCommand(fallbackMethod = "hiError") public String hiService(String name) { return restTemplate.getForObject("http://eurekaclient/hi?name="+name,String.class); } public String hiError(String name) { return "hi,"+name+",sorry,error!"; } }
5.测试,当对应的服务关闭时,访问对应服务返回如下:
6.feign原本就继承了断路功能,需要在配置里打开:
application.yml新增下面内容:
feign: hystrix: enabled: true
7.在客户端服务接口上增加注解时,加上fallback参数即可
@FeignClient(value = "service-hi",fallback = SchedualServiceHiHystric.class)
8.然后写这个接口的一个实现类SchedualServiceHiHystric
package com.bennytitan.servicefeign; import org.springframework.stereotype.Component; @Component public class SchedualServiceHiHystric implements SchedualServiceHi { @Override public String sayHiFromClientOne(String name) { return "sorry "+name; } }
这样就完成了。
9.如果要加入Hystrix Dashboard来打开断路器仪表盘页面显示断路器工作情况。需要增加依赖:
<!-- 断路器仪表盘 --> <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-dashboard</artifactId> </dependency>
10.在配置bean增加下面的bean配置:
@Bean ServletRegistrationBean getServlet(){ HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet(); ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet); registrationBean.setLoadOnStartup(1); registrationBean.addUrlMappings("/hystrix.stream"); registrationBean.setName("HystrixMetricsStreamServlet"); return registrationBean; }
11.在服务启动类里添加注解:@EnableHystrixDashboard
12.测试访问:http://localhost:8764/hystrix
打开页面,输入红框内的内容后点击按钮
完成。
原文地址:https://www.cnblogs.com/BennyTitan/p/9198418.html
时间: 2024-11-05 22:47:42