/**
* Copyright (C) 2002-2012 The FreeCol Team
*
* This file is part of FreeCol.
*
* FreeCol 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 2 of the License, or
* (at your option) any later version.
*
* FreeCol 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 FreeCol. If not, see <http://www.gnu.org/licenses/>.
*/
package net.sf.freecol.client;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.logging.Level;
import java.util.logging.Logger;
import net.sf.freecol.FreeCol;
/**
* The Worker Thread executes jobs one after another. The thread manages a queue
* where new jobs can be enqueued. The jobs are processed synchronously by the
* worker.
*/
public final class Worker extends Thread {
private final LinkedBlockingQueue<Runnable> jobList;
private volatile boolean stopRunning;
private static final Logger logger = Logger.getLogger(Worker.class.getName());
public Worker() {
super(FreeCol.CLIENT_THREAD+"Worker");
jobList = new LinkedBlockingQueue<Runnable>();
stopRunning = false;
}
@Override
public void run() {
while (!stopRunning) {
try {
// run the next waiting job
Runnable job = jobList.take();
try {
job.run();
} catch (Exception e) {
logger.log(Level.SEVERE, "Worker task failed!", e);
}
} catch (InterruptedException e) {
logger.log(Level.INFO, "Worker interrupted, aborting!");
}
}
}
/**
* Adds a new job to the queue
*
* @param job the job to add to the queue.
*/
public void schedule(Runnable job) {
jobList.add(job);
}
/**
* Makes the worker thread stop running.
*/
public void askToStop() {
stopRunning = true;
this.interrupt();
}
}