001package org.cache2k.impl.timer;
002
003/*
004 * #%L
005 * cache2k core package
006 * %%
007 * Copyright (C) 2000 - 2015 headissue GmbH, Munich
008 * %%
009 * This program is free software: you can redistribute it and/or modify
010 * it under the terms of the GNU General Public License as
011 * published by the Free Software Foundation, either version 3 of the 
012 * License, or (at your option) any later version.
013 * 
014 * This program is distributed in the hope that it will be useful,
015 * but WITHOUT ANY WARRANTY; without even the implied warranty of
016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
017 * GNU General Public License for more details.
018 * 
019 * You should have received a copy of the GNU General Public 
020 * License along with this program.  If not, see
021 * <http://www.gnu.org/licenses/gpl-3.0.html>.
022 * #L%
023 */
024
025/**
026* @author Jens Wilke; created: 2014-03-23
027*/
028public final class PayloadTask<T> extends BaseTimerTask {
029
030  T payload;
031  TimerPayloadListener<T> listener;
032
033  public PayloadTask(long time, T payload, TimerPayloadListener<T> listener) {
034    super(time);
035    this.payload = payload;
036    this.listener = listener;
037  }
038
039  protected boolean fire(long now) {
040    final TimerPayloadListener<T> l = listener;
041    final T pl = payload;
042    if (l != null && pl != null) {
043      l.fire(pl, time);
044      return true;
045    }
046    return false;
047  }
048
049  /**
050   * Cancel the timer execution.
051   */
052  public void cancel() {
053    listener = null;
054    payload = null;
055  }
056
057  public boolean isCancelled() {
058    return listener == null;
059  }
060
061}