Pool.java

/*******************************************************************************
 * Copyright (c) 2004, 2013 Steve Flasby
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * <ul>
 *     <li>Redistributions of source code must retain the above copyright notice,
 *         this list of conditions and the following disclaimer.</li>
 *     <li>Redistributions in binary form must reproduce the above copyright notice,
 *         this list of conditions and the following disclaimer in the documentation
 *         and/or other materials provided with the distribution.</li>
 * </ul>
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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package org.flasby.util;

import java.util.NoSuchElementException;
import java.util.concurrent.ConcurrentLinkedQueue;

public abstract class Pool<T> {
	private ConcurrentLinkedQueue<T> t = new ConcurrentLinkedQueue<T>();
	
	public Pool(int initialSize) {
		for (int i = 0; i < initialSize; i++) {
			put(create());
		}
	}
	
	public T take() {
		try {
			return t.remove();
		} catch ( NoSuchElementException ignored ) {
			return create();
		}
	}
	
	public void put(T elem) {
		t.add(elem);
	}
	
	protected abstract T create();
}