动态feign调用

动态feign调用"/>

动态feign调用

1.上下文类

@Component("springContextS")
public class SpringContextS implements ApplicationContextAware{private static ApplicationContext applicationContext;public void setApplicationContext(ApplicationContext applicationContext) throw BeansException {SpringContextS.applicationContext = applicationContext;    }public static ApplicationContext getApplicationContext(){return applicationContext;}
}

2.Feign工具类

public class FeignClientUtils {private static final Map<String,Object> FEIGN_CACHE = new ConcurrentHashMap();private static <T> T build(String type,String server,Class<T> clazz){String key = String.format("%s-%s",type,server);T t = (T) FEIGN_CACHE.get(key);if(Objects.isNull(t)){FeignClientBuilder.Builder<T> builder = new FeignClientBuilder(SpringContextS.getApplicationContext()).forType(clazz,server):builder = builder.contextId(UUID.randomUUID().toString());t = builder.build();FEIGN_CACHE.put(key,t);}return t;}
}

3.Feign接口模板

public interface FeignClientTemplate {@PostMapping("/TEMPLATE/list")Result<List<ResDTO>> list(@RequestBody ReqDTO dto); 
}

4.Feign拦截器

@Configuration
public class TempFeignInterceptor implements RequestInterceptor{@Overridepublic void apply(RequestTemplate template){String server = template.feignTarget().name.toLowerCase();String url = "/" + server+"/test"String tempUrl = template.url();if(StringUtils.isNotEmpty(templateUrl){if(tempUrl.contains("TEMPLATE")){template.uri(tempUrl.replace("TEMPLATE",url);}}}
}

5.使用

public void use(ReqDTO dto){FeignClientTemplate client = FeignClientUtils.build("TEXT","TEXT",FeignClientTemplate.class);Result< List<ResDTO>> result =  client.list(dto);
}