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Nuts'n'Bolts Utilities
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/*
 * Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 David Berkman
 * 
 * This file is part of the SmallMind Code Project.
 * 
 * The SmallMind Code Project is free software, you can redistribute
 * it and/or modify it under either, at your discretion...
 * 
 * 1) The terms of 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.
 * 
 * ...or...
 * 
 * 2) The terms of the Apache License, Version 2.0.
 * 
 * The SmallMind Code Project 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 or Apache License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * and the Apache License along with the SmallMind Code Project. If not, see
 *  or .
 * 
 * Additional permission under the GNU Affero GPL version 3 section 7
 * ------------------------------------------------------------------
 * If you modify this Program, or any covered work, by linking or
 * combining it with other code, such other code is not for that reason
 * alone subject to any of the requirements of the GNU Affero GPL
 * version 3.
 */
package org.smallmind.nutsnbolts.io;

import java.io.File;
import java.io.FileFilter;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

public class FileProcessorGopher implements Runnable {

  private CountDownLatch terminationLatch;
  private CountDownLatch exitLatch;
  private FileProcessorQueue fileProcessorQueue;
  private File directory;
  private FileFilter fileFilter;
  private TimeUnit timeUnit;
  private long pulse;

  public FileProcessorGopher (FileProcessorQueue fileProcessorQueue, File directory, FileFilter fileFilter, long pulse, TimeUnit timeUnit) {

    this.fileProcessorQueue = fileProcessorQueue;
    this.directory = directory;
    this.fileFilter = fileFilter;
    this.pulse = pulse;
    this.timeUnit = timeUnit;

    terminationLatch = new CountDownLatch(1);
    exitLatch = new CountDownLatch(1);
  }

  public void finish ()
    throws InterruptedException {

    terminationLatch.countDown();
    exitLatch.await();
  }

  public void run () {

    try {
      do {
        for (File file : new FileIterator(directory, fileFilter)) {
          fileProcessorQueue.push(file);
        }

      } while (!terminationLatch.await(pulse, timeUnit));
    }
    catch (InterruptedException interruptedException) {
      terminationLatch.countDown();
    }
    finally {
      exitLatch.countDown();
    }
  }
}