Android Open Source - ironcontrol-for-android Subscription Poller

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License

The source code is released under:
Apache License
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Java Source Code

/*
 * #%L/*w w  w.jav a 2 s.  c o  m*/
 * =====================================================
 *   _____                _     ____  _   _       _   _
 *  |_   _|_ __ _   _ ___| |_  / __ \| | | | ___ | | | |
 *    | | | '__| | | / __| __|/ / _` | |_| |/ __|| |_| |
 *    | | | |  | |_| \__ \ |_| | (_| |  _  |\__ \|  _  |
 *    |_| |_|   \__,_|___/\__|\ \__,_|_| |_||___/|_| |_|
 *                             \____/
 * 
 * =====================================================
 * 
 * Hochschule Hannover
 * (University of Applied Sciences and Arts, Hannover)
 * Faculty IV, Dept. of Computer Science
 * Ricklinger Stadtweg 118, 30459 Hannover, Germany
 * 
 * Email: trust@f4-i.fh-hannover.de
 * Website: http://trust.f4.hs-hannover.de/
 * 
 * This file is part of ironcontrol for android, version 1.0.1, implemented by the Trust@HsH research group at the Hochschule Hannover.
 * %%
 * Copyright (C) 2013 Trust@HsH
 * %%
 * 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.
 * #L%
 */
package de.hshannover.f4.trust.ironcontrol.logic;

import java.util.ArrayList;

import de.hshannover.f4.trust.ifmapj.channel.ARC;
import de.hshannover.f4.trust.ifmapj.exception.EndSessionException;
import de.hshannover.f4.trust.ifmapj.exception.IfmapErrorResult;
import de.hshannover.f4.trust.ifmapj.exception.IfmapException;
import de.hshannover.f4.trust.ifmapj.exception.InitializationException;
import de.hshannover.f4.trust.ifmapj.messages.PollResult;
import de.hshannover.f4.trust.ironcontrol.logger.Level;
import de.hshannover.f4.trust.ironcontrol.logger.Logger;
import de.hshannover.f4.trust.ironcontrol.logger.LoggerFactory;
import de.hshannover.f4.trust.ironcontrol.logic.data.PollReceiver;
import de.hshannover.f4.trust.ironcontrol.logic.data.PollSender;

/**
 * Class for connection management
 * @author Daniel Wolf
 * @author Anton Saenko
 * @author Arne Loth
 * @author Marcel Reichenbach
 * @version 1.0
 */

public class SubscriptionPoller extends Thread implements PollSender {

  private static final Logger logger = LoggerFactory.getLogger(SubscriptionPoller.class);

  private ArrayList<PollReceiver> mPollReceiver;

  private PollResult mPollResult;

  private static SubscriptionPoller mInstance;


  private SubscriptionPoller() {
    logger.log(Level.DEBUG, "New SubscriptionPoller()");
    mPollReceiver = new ArrayList<PollReceiver>();
  }

  public static synchronized SubscriptionPoller getInstance(){
    if(mInstance == null){
      mInstance = new SubscriptionPoller();
    }
    return mInstance;
  }

  /**
   * Is a Thread method create a pollresult
   * 
   * @since 0.1
   */
  @Override
  public void run() {
    setName(SubscriptionPoller.class.getSimpleName());
    logger.log(Level.DEBUG, "run()...");

    while (!interrupted()) {
      ARC mArc = getARC();
      if(mArc != null){
        try {
          logger.log(Level.DEBUG, "new poll...");
          mPollResult = mArc.poll();
          logger.log(Level.DEBUG, "...poll OK");

          // submit the result
          onNewPollResult(mPollResult);

          // forget the result
          mPollResult = null;

        } catch (IfmapErrorResult e) {
          logger.log(Level.ERROR, "IfmapErrorResult: STOP Poll" + e.getErrorString(), e);
          waitForNewConnection();

        } catch (EndSessionException e) {
          logger.log(Level.ERROR, "EndSessionException: STOP Poll", e);
          waitForNewConnection();

        } catch (IfmapException e) {
          logger.log(Level.ERROR, "IfmapException: STOP Poll " + e.getDescription(), e);
          waitForNewConnection();
        }
      }else{
        waitForNewConnection();
      }
    }
    logger.log(Level.DEBUG, "...run()");
  }

  @Override
  public void addPollReceiver(PollReceiver pr) {
    if(pr != null){
      logger.log(Level.DEBUG, "add new PollReceiver()");
      mPollReceiver.add(pr);
    }else{
      logger.log(Level.WARN, "PollReceiver is null, dosen't add");
    }
  }

  public void onNewPollResult(PollResult pr) {
    logger.log(Level.DEBUG, "onNewPollResult()...");
    for(PollReceiver receiver: mPollReceiver){
      receiver.submitNewPollResult(pr);
    }
    logger.log(Level.DEBUG, "...onNewPollResult()");
  }

  private void waitForNewConnection() {
    logger.log(Level.DEBUG, "waitForNewConnection()...");
    try {

      synchronized (this){
        wait();
      }

    } catch (InterruptedException e) {
      logger.log(Level.DEBUG, e.getMessage(), e);
    }
    logger.log(Level.DEBUG, "...waitForNewConnection()");
  }

  private ARC getARC() {
    try {
      return Connection.getARC();
    } catch (InitializationException e) {
      logger.log(Level.ERROR, e.getDescription(),e);
    }
    return null;
  }
}
Java Source Code List
