Spring Cloud Feign记录错误日志

最新推荐文章于 2025-08-01 20:19:23 发布

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#feign #fallback #fallbackFactory

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本文介绍如何在Spring Cloud项目中集成Feign与Hystrix实现服务间调用的熔断与容错机制。包括pom.xml依赖配置、启用Hystrix、定义Feign客户端及其熔断逻辑。

1.pom.xml

<dependency>
	<groupId>org.springframework.cloud</groupId>
	<artifactId>spring-cloud-starter-feign</artifactId>
</dependency>

2.配置文件

#开启feign
feign.hystrix.enabled=true
#断路器，断路器跳闸后等待多长时间重试
hystrix.command.default.circuitBreaker.sleepWindowInMilliseconds=1000
#断路器，请求发出后多长时间超时
hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=5000

3.启动类加上注解@EnableFeignClients

@EnableDiscoveryClient
@SpringBootApplication
@EnableFeignClients
public class EurekaHystrixApplication {

	 public static void main(String[] args) {
	        new SpringApplicationBuilder(
	        		EurekaHystrixApplication.class)
	            .web(true).run(args);
	 }
}

4.Service类

说明fallback与fallbackFactory区别，fallback只是出错运行你指定的方法，拿不到错误信息，fallbackFactory可以拿到错误信息

@FeignClient(name="eureka-hystrix",fallbackFactory=HelloFallbackFactory.class)
public interface HelloService {

	@RequestMapping(value="/test",method=RequestMethod.GET)  
    String hiService(@RequestParam("name") String name); 
	
	@RequestMapping(value="/test1",method=RequestMethod.GET)  
    String hiService1(@RequestParam("name") String name); 
}

5.接口

public interface HelloFallback extends HelloService{

}

6.HelloFallbackFactory，注意添加注解@Component

@Component
public class HelloFallbackFactory implements FallbackFactory<HelloService>{

	@Override
	public HelloService create(Throwable e) {
		System.out.println("错误信息："+e.getMessage());
		return new HelloFallback() {
			
			@Override
			public String hiService(String name) {
				return "error";
			}

			@Override
			public String hiService1(String name) {
				return "error1";
			}
		};
	}

}