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);
}
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动态feign调用
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