001/*
002 * jPOS Project [http://jpos.org]
003 * Copyright (C) 2000-2026 jPOS Software SRL
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Affero General Public License as
007 * published by the Free Software Foundation, either version 3 of the
008 * License, or (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Affero General Public License for more details.
014 *
015 * You should have received a copy of the GNU Affero General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018
019package org.jpos.util;
020
021import java.util.Timer;
022import java.util.TimerTask;
023import java.util.concurrent.atomic.AtomicLong;
024
025
026/**
027 * WatchDog will issue a warning message 
028 * if not canceled on time
029 */
030@SuppressWarnings("unused")
031public class WatchDog extends TimerTask {
032    String message;
033    String logName;
034    String realm;
035    private static Timer timer = new Timer(true);
036    private static AtomicLong counter = new AtomicLong(0L);
037    public static long PURGE_INTERVAL = 1000L;
038
039    public WatchDog (long duration) {
040        timer.schedule(this, duration);
041        if (counter.incrementAndGet() % PURGE_INTERVAL == 0)
042            timer.purge();  // pro-active purge due to excessive number of timertask cancels.
043    }
044    public WatchDog (long duration, String message) {
045        this(duration);
046        this.logName = "Q2";
047        this.realm = "watchdog";
048        this.message = message;
049    }
050    public void setLogName (String logName) {
051        this.logName = logName;
052    }
053    public void setRealm (String realm) {
054        this.realm = realm;
055    }
056    public void run () {
057        if (message != null)
058            Log.getLog (logName, realm).warn (message);
059    }
060}