content: //    HelloIoT is a dashboard creator for MQTT
  //    Copyright (C) 2017-2018 Adrián Romero Corchado.
  //
  //    This file is part of HelloIot.
  //
  //    HelloIot is free software: you can redistribute it and/or modify
  //    it under the terms of the GNU General Public License as published by
  //    the Free Software Foundation, either version 3 of the License, or
  //    (at your option) any later version.
  //
  //    HelloIot is distributed in the hope that it will be useful,
  //    but WITHOUT ANY WARRANTY; without even the implied warranty of
  //    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  //    GNU General Public License for more details.
  //
  //    You should have received a copy of the GNU General Public License
  //    along with HelloIot.  If not, see <http://www.gnu.org/licenses/>.
  //
  package com.adr.helloiot.device;
  
  import com.adr.helloiot.util.CompletableAsync;
  import com.adr.helloiotlib.app.EventMessage;
  import com.adr.helloiotlib.device.Device;
  import com.adr.helloiotlib.format.MiniVar;
  import com.adr.helloiotlib.app.TopicManager;
  import java.util.concurrent.ScheduledFuture;
  
  /**
   *
   * @author adrian
   */
  public class TransmitterSimple extends Device implements DeviceSend {
      
      protected TopicManager manager;
      private ScheduledFuture<?> sf = null;
      private final Object sflock = new Object();  
      
      @Override
      public final void construct(TopicManager manager) {
          this.manager = manager;
      }
  
      @Override
      public final void destroy() {
      }
  
      @Override
      public String getDeviceName() {
          return resources.getString("devicename.transmittersimple");
      }
  
      @Override
      public void sendStatus(MiniVar event) {
          cancelTimer();
          EventMessage message = new EventMessage(getTopicPublish(), getFormat().devalue(event), getMessageProperties());
          manager.publish(message);
      }
  
      @Override
      public void sendStatus(String event) {
          sendStatus(getFormat().parse(event));
      }
      
      @Override
      public void sendStatus(MiniVar status, long delay) {
          synchronized (sflock) {
              cancelTimer();
              sf = CompletableAsync.scheduleTask(delay, () -> {
                  TransmitterSimple.this.sendStatus(status);
              });
          }
      }
  
      @Override
      public void sendStatus(String status, long delay) {
          sendStatus(getFormat().parse(status), delay);
      }
  
      @Override
      public boolean hasTimer() {
          synchronized (sflock) {
              return sf != null;
          }
      }
  
      @Override
      public void cancelTimer() {
          synchronized (sflock) {
              if (sf != null) {
                  sf.cancel(false);
                  sf = null;
              }
          }
      }    
  }
  