WorkerThread.java

/*
 * Aphelion
 * Copyright (c) 2013  Joris van der Wel
 * 
 * This file is part of Aphelion
 * 
 * Aphelion is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, version 3 of the License.
 * 
 * Aphelion 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 Affero General Public License
 * along with Aphelion.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * In addition, the following supplemental terms apply, based on section 7 of
 * the GNU Affero General Public License (version 3):
 * a) Preservation of all legal notices and author attributions
 * b) Prohibition of misrepresentation of the origin of this material, and
 * modified versions are required to be marked in reasonable ways as
 * different from the original version (for example by appending a copyright notice).
 * 
 * Linking this library statically or dynamically with other modules is making a
 * combined work based on this library. Thus, the terms and conditions of the
 * GNU Affero General Public License cover the whole combination.
 * 
 * As a special exception, the copyright holders of this library give you 
 * permission to link this library with independent modules to produce an 
 * executable, regardless of the license terms of these independent modules,
 * and to copy and distribute the resulting executable under terms of your 
 * choice, provided that you also meet, for each linked independent module,
 * the terms and conditions of the license of that module. An independent
 * module is a module which is not derived from or based on this library.
 */
package aphelion.shared.event;

import aphelion.shared.event.promise.PromiseException;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.LinkedBlockingDeque;
import java.util.logging.Logger;

/**
 *
 * @author Joris
 */
class WorkerThread extends Thread
{
        private static final Logger log = Logger.getLogger("aphelion.eventloop");
        Workable workable;
        LinkedBlockingDeque<WorkerTask> tasks;
        private final String spawnThreadName;

        WorkerThread(Workable workable, LinkedBlockingDeque<WorkerTask> tasks)
        {
                this.workable = workable;
                this.tasks = tasks;
                spawnThreadName = Thread.currentThread().getName();
        }

        
        @Override
        @SuppressWarnings("unchecked")
        public void run()
        {
                WorkerTask task;
                setName(spawnThreadName+"-WorkerThread-"+this.getId());
                try
                {
                        while (!this.isInterrupted())
                        {
                                
                                task = tasks.take(); // blocks
                                try
                                {
                                        task.ret = null;
                                        task.error = null;
                                        task.ret = task.work(task.argument);
                                }
                                catch (PromiseException ex)
                                {
                                        task.error = ex;
                                }
                                
                                
                                workable.taskCompleted(task);
                        }
                }
                catch (InterruptedException ex)
                {
                }
        }
        
}