标签：not cloud get autowire str cat string led fallback
原始的调用客户端的方式是通过注入restTemplate的方式
restTemplate.getForObject("http://CLIENT/hello", String.class)
通过feign的方式
配置消费者项目cloud-consume
pom.xml
依赖jar
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency>
application.yml
添加启动feign 可实现错误回调
feign:
hystrix:
enabled: true
启动应用类
ClondConsumeApplication.java
添加注解@EnableFeignClients
HelloService.java接口
package com.tp.soft.cloudconsume.service; import com.tp.soft.cloudconsume.service.impl.HelloServiceFallback; import org.springframework.cloud.openfeign.FeignClient; import org.springframework.web.bind.annotation.GetMapping; @FeignClient(value = "CLIENT", fallback = HelloServiceFallback.class) public interface HelloService { @GetMapping("/hello") String hello(); }
其中CLIENT则为注册中心被调用的应用名,/hello完全和客户端业务接口一样,fallback则为错误回调的方法
HelloServiceFallback.java接口
package com.tp.soft.cloudconsume.service.impl; import com.tp.soft.cloudconsume.service.HelloService; import org.springframework.stereotype.Component; @Component public class HelloServiceFallback implements HelloService { @Override public String hello() { return "request error"; } }
HelloController.java
package com.tp.soft.cloudconsume.controller; import com.tp.soft.cloudconsume.service.HelloService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.client.RestTemplate; import javax.annotation.Resource; @RestController public class HelloController { // @Autowired // RestTemplate restTemplate; @Resource private HelloService helloService; @GetMapping("hi") public String hi(){ //return restTemplate.getForObject("http://CLIENT/hello", String.class); return helloService.hello(); } }
和原来在controller调用接口一模一样的去调用就可以了
最后的效果:
标签：not cloud get autowire str cat string led fallback
原文地址：https://www.cnblogs.com/tplovejava/p/10356908.html
