com.taotao.cloud.openfeign.endpoint.FeignClientEndpoint Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of taotao-cloud-starter-openfeign Show documentation
taotao-cloud-starter-openfeign
There is a newer version: 2025.01
Show newest version
/*
 * Copyright (c) 2020-2030, Shuigedeng ([email protected] & https://blog.taotaocloud.top/).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.taotao.cloud.openfeign.endpoint;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.springframework.beans.factory.SmartInitializingSingleton;
import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
import org.springframework.boot.actuate.endpoint.annotation.ReadOperation;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.context.ApplicationContext;
import org.springframework.core.annotation.AnnotatedElementUtils;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

/** Feign client 端点 */
@Endpoint(id = "ttc-feign-clients")
public class FeignClientEndpoint implements SmartInitializingSingleton {

    private final ApplicationContext context;

    private final List clientList;

    public FeignClientEndpoint(ApplicationContext context) {
        this.context = context;
        this.clientList = new ArrayList<>();
    }

    @ReadOperation
    public List invoke() {
        return clientList;
    }

    @Override
    public void afterSingletonsInstantiated() {
        clientList.addAll(getClientList(context));
    }

    private static List getClientList(ApplicationContext context) {
        Map feignClientMap = context.getBeansWithAnnotation(FeignClient.class);
        // 1. 解析注解
        List feignClientInfoList = new ArrayList<>();
        Set> feignClientEntrySet = feignClientMap.entrySet();
        for (Map.Entry feignClientEntry : feignClientEntrySet) {
            String beanName = feignClientEntry.getKey();
            Object feignClientBean = feignClientEntry.getValue();
            if (feignClientBean == null) {
                continue;
            }
            // 解析注解
            Class feignClientClass = feignClientBean.getClass();
            FeignClient feignClientAnn = AnnotationUtils.findAnnotation(feignClientClass, FeignClient.class);
            if (feignClientAnn == null) {
                continue;
            }
            FeignClientInfo feignClientInfo = new FeignClientInfo();
            feignClientInfo.setBeanName(beanName);
            String serviceId = feignClientAnn.value();
            String contextId = feignClientAnn.contextId();
            String url = feignClientAnn.url();
            String path = feignClientAnn.path();
            feignClientInfo.setServiceId(serviceId);
            feignClientInfo.setContextId(contextId);
            feignClientInfo.setUrl(url);
            feignClientInfo.setPath(path);
            // 组装客户端信息
            List clientInfoList = new ArrayList<>();
            Class[] interfaces = feignClientClass.getInterfaces();
            for (Class clientInterface : interfaces) {
                Method[] methods = clientInterface.getDeclaredMethods();
                for (Method method : methods) {
                    if (method.isDefault()) {
                        continue;
                    }
                    RequestMapping requestMapping =
                            AnnotatedElementUtils.getMergedAnnotation(method, RequestMapping.class);
                    if (requestMapping == null) {
                        continue;
                    }
                    clientInfoList.add(new ClientInfo(requestMapping.method(), requestMapping.value()));
                }
            }
            feignClientInfo.setClientList(clientInfoList);
            feignClientInfoList.add(feignClientInfo);
        }
        return feignClientInfoList;
    }

    public static class FeignClientInfo {

        private String beanName;

        private String serviceId;

        private String contextId;

        private String url;

        private String path;

        private List clientList;

        public String getBeanName() {
            return beanName;
        }

        public void setBeanName(String beanName) {
            this.beanName = beanName;
        }

        public String getServiceId() {
            return serviceId;
        }

        public void setServiceId(String serviceId) {
            this.serviceId = serviceId;
        }

        public String getContextId() {
            return contextId;
        }

        public void setContextId(String contextId) {
            this.contextId = contextId;
        }

        public String getUrl() {
            return url;
        }

        public void setUrl(String url) {
            this.url = url;
        }

        public String getPath() {
            return path;
        }

        public void setPath(String path) {
            this.path = path;
        }

        public List getClientList() {
            return clientList;
        }

        public void setClientList(List clientList) {
            this.clientList = clientList;
        }
    }

    public static class ClientInfo {

        private final RequestMethod[] methods;

        private final String[] mappings;

        public ClientInfo(RequestMethod[] methods, String[] mappings) {
            this.methods = methods;
            this.mappings = mappings;
        }

        public RequestMethod[] getMethods() {
            return methods;
        }

        public String[] getMappings() {
            return mappings;
        }
    }
}