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.csp.sentinel.transport.heartbeat;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import com.alibaba.csp.sentinel.Constants;
  import com.alibaba.csp.sentinel.config.SentinelConfig;
  import com.alibaba.csp.sentinel.transport.config.TransportConfig;
  import com.alibaba.csp.sentinel.util.AppNameUtil;
  import com.alibaba.csp.sentinel.util.HostNameUtil;
  import com.alibaba.csp.sentinel.util.TimeUtil;
  
  /**
   * Heart beat message entity.
   * The message consists of key-value pair parameters.
   *
   * @author leyou
   */
  public class HeartbeatMessage {
  
      private final Map<String, String> message = new HashMap<String, String>();
  
      public HeartbeatMessage() {
          message.put("hostname", HostNameUtil.getHostName());
          message.put("ip", TransportConfig.getHeartbeatClientIp());
          message.put("app", AppNameUtil.getAppName());
          // Put application type (since 1.6.0).
          message.put("app_type", String.valueOf(SentinelConfig.getAppType()));
          message.put("port", String.valueOf(TransportConfig.getPort()));
      }
  
      public HeartbeatMessage registerInformation(String key, String value) {
          message.put(key, value);
          return this;
      }
  
      public Map<String, String> generateCurrentMessage() {
          // Version of Sentinel.
          message.put("v", Constants.SENTINEL_VERSION);
          // Actually timestamp.
          message.put("version", String.valueOf(TimeUtil.currentTimeMillis()));
          message.put("port", String.valueOf(TransportConfig.getPort()));
          return message;
      }
  }
  