基于环境定义不同的Feign客户端实现

Question

@FeignClient(name = "http://foo-service")
public interface FooResource {
    @RequestMapping(value = "/doSomething", method = GET)
    String getResponse();
}

public class MyService {
    private FooResource fooResource;

    ...

    public void getFoo() {
        String response = this.fooResource.getResponse();
        ...
    }
}

@Configuration
public class AppConfig {
    @Bean
    @ConditionalOnProperty(prefix = "spring.profile", name = "active", havingValue="local")
    public FooResource fooResource() {
        return new FooResource() {
            @Override
            public String getResponse() {
                return "testing";
            }
        };
    }
}

根据Intellij的说法。这是由Spring Cloud Netflix框架自动生成的类型，因此尝试与远程服务进行实际通信。

是否有一种方法可以根据配置设置有条件地重写Feign接口的实现？

Answer 1

解决方案如下所示：

public interface FeignBase {
   @RequestMapping(value = "/get", method = RequestMethod.POST, headers = "Accept=application/json")
   Result get(@RequestBody Token common);
}

然后定义基于环境的接口：

@Profile("prod")
@FeignClient(name = "service.name")
public interface Feign1 extends FeignBase 
{}

@Profile("!prod")
@FeignClient(name = "service.name", url = "your url")
public interface Feign2 extends FeignBase 
{}

最后，在您的服务Impl中：

@Resource
private FeignBase feignBase;