/*
* JORAM: Java(TM) Open Reliable Asynchronous Messaging
* Copyright (C) 2009 - 2010 ScalAgent Distributed Technologies
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*
* Initial developer(s): ScalAgent Distributed Technologies
* Contributor(s):
*/
package fr.dyade.aaa.agent;
import java.util.Timer;
import java.util.TimerTask;
import org.objectweb.util.monolog.api.BasicLevel;
import org.objectweb.util.monolog.api.Logger;
/**
* Class used to schedule a wake up on a specific agent. A notification is sent
* to activate the agent.
*/
public class WakeUpTask extends TimerTask {
private static final Logger logger = Debug.getLogger(WakeUpTask.class.getName());
private AgentId destId;
private Class wakeUpNot;
private boolean schedule;
/**
* Creates a new WakeUpTask and schedules it.
*
* @param id
* the id of the agent to wake up.
* @param wakeUpNotClass
* the notification which will be sent to the agent
* @param period period to wake up.
*/
public WakeUpTask(AgentId id, Class wakeUpNotClass, long period) {
if (logger.isLoggable(BasicLevel.DEBUG))
logger.log(BasicLevel.DEBUG, "Create new wake up task, period=" + period);
schedule = false;
destId = id;
wakeUpNot = wakeUpNotClass;
schedule(period);
}
public void run() {
try {
Channel.sendTo(destId, (Notification) wakeUpNot.newInstance());
} catch (Exception exc) {
logger.log(BasicLevel.ERROR, "--- " + this, exc);
}
}
/**
* Schedules the wake up task for execution after the given period.
*
* @param period Delay in ms before waking up.
*/
private void schedule(long period) {
if (logger.isLoggable(BasicLevel.DEBUG))
logger.log(BasicLevel.DEBUG, "Schedule wake up task, period=" + period);
// Don't schedule on HA slaves.
if (AgentServer.isHAServer() && !AgentServer.isMasterHAServer())
return;
if (period > 0) {
try {
Timer timer = AgentServer.getTimer();
if (!schedule) {
timer.schedule(this, period, period);
schedule = true;
}
} catch (Exception exc) {
if (logger.isLoggable(BasicLevel.WARN))
logger.log(BasicLevel.WARN, "--- " + this, exc);
}
}
}
}