content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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
   *
   *      http://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.alibaba.nacos.config.server.controller;
  
  import com.alibaba.nacos.config.server.constant.Constants;
  import com.alibaba.nacos.config.server.model.SampleResult;
  import com.alibaba.nacos.config.server.service.LongPollingService;
  import com.alibaba.nacos.config.server.service.dump.DumpService;
  import com.alibaba.nacos.config.server.service.notify.NotifyService;
  import org.apache.commons.lang3.StringUtils;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Controller;
  import org.springframework.ui.ModelMap;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestMethod;
  import org.springframework.web.bind.annotation.RequestParam;
  import org.springframework.web.bind.annotation.ResponseBody;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  /**
   * 用于其他节点通知的控制器
   *
   * @author boyan
   * @date 2010-5-7
   */
  @Controller
  @RequestMapping(Constants.COMMUNICATION_CONTROLLER_PATH)
  public class CommunicationController {
  
      private final DumpService dumpService;
  
      private final LongPollingService longPollingService;
  
      private String trueStr = "true";
  
      @Autowired
      public CommunicationController(DumpService dumpService, LongPollingService longPollingService) {
          this.dumpService = dumpService;
          this.longPollingService = longPollingService;
      }
  
      /**
       * 通知配置信息改变
       */
      @RequestMapping(value = "/dataChange", method = RequestMethod.GET)
      @ResponseBody
      public Boolean notifyConfigInfo(HttpServletRequest request, HttpServletResponse response,
                                      @RequestParam("dataId") String dataId, @RequestParam("group") String group,
                                      @RequestParam(value = "tenant", required = false, defaultValue = StringUtils.EMPTY)
                                          String tenant,
                                      @RequestParam(value = "tag", required = false) String tag) {
          dataId = dataId.trim();
          group = group.trim();
          String lastModified = request.getHeader(NotifyService.NOTIFY_HEADER_LAST_MODIFIED);
          long lastModifiedTs = StringUtils.isEmpty(lastModified) ? -1 : Long.parseLong(lastModified);
          String handleIp = request.getHeader(NotifyService.NOTIFY_HEADER_OP_HANDLE_IP);
          String isBetaStr = request.getHeader("isBeta");
          if (StringUtils.isNotBlank(isBetaStr) && trueStr.equals(isBetaStr)) {
              dumpService.dump(dataId, group, tenant, lastModifiedTs, handleIp, true);
          } else {
              dumpService.dump(dataId, group, tenant, tag, lastModifiedTs, handleIp);
          }
          return true;
      }
  
      /**
       * 在本台机器上获得订阅改配置的客户端信息
       */
      @RequestMapping(value = "/configWatchers", method = RequestMethod.GET)
      @ResponseBody
      public SampleResult getSubClientConfig(HttpServletRequest request,
                                             HttpServletResponse response,
                                             @RequestParam("dataId") String dataId,
                                             @RequestParam("group") String group,
                                             @RequestParam(value = "tenant", required = false) String tenant,
                                             ModelMap modelMap) {
          group = StringUtils.isBlank(group) ? Constants.DEFAULT_GROUP : group;
          return longPollingService.getCollectSubscribleInfo(dataId, group, tenant);
      }
  
      /**
       * 在本台机器上获得客户端监听的配置列表
       */
      @RequestMapping(value = "/watcherConfigs", method = RequestMethod.GET)
      @ResponseBody
      public SampleResult getSubClientConfigByIp(HttpServletRequest request,
                                                 HttpServletResponse response, @RequestParam("ip") String ip,
                                                 ModelMap modelMap) {
          return longPollingService.getCollectSubscribleInfoByIp(ip);
      }
  }
  