/*
* Concept profile generation tool suite
* Copyright (C) 2015 Biosemantics Group, Erasmus University Medical Center,
* Rotterdam, The Netherlands
*
* This program 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, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
package org.erasmusmc.concurrency;
/**
* Thread class for processing data in batches. After construction, the thread will stay alive
* until terminate() is called. When proceed() is called, the function process() is executed in the
* thread. waitUntilFinished() will wait until the thread is done executing process().
*
* @author schuemie
*
*/
public abstract class BatchProcessingThread extends Thread {
private final Semaphore newInputSemaphore = new Semaphore();
private final Semaphore newOutputSemaphore = new Semaphore();
private boolean terminated = false;
public BatchProcessingThread(){
super();
this.start();
}
public void run(){
while (true){
newInputSemaphore.release();
if (terminated)
break;
process();
newOutputSemaphore.take();
}
}
protected abstract void process();
public void proceed(){ //This method will be run in the other thread!
newInputSemaphore.take();
}
public void waitUntilFinished(){ //Runs in other thread!
newOutputSemaphore.release();
}
public synchronized void terminate(){//Runs in other thread!
terminated = true;
newInputSemaphore.take();
}
}