simplecachepool.java

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package com.jdev.util;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

/**
 * <a href="SimpleCachePool.java.html"><b><i>View Source</i></b></a>
 *
 * @author  Brian Chan
 * @version $Revision: 1.2 $
 *
 */
public class SimpleCachePool {

	private static SimpleCachePool _instance;
	private static int _SIZE = 100000;

	private Map<String, Object> _scPool;

	public static Object get(String id) {
		return _getInstance()._get(id);
	}

	public static void put(String id, Object obj) {
		_getInstance()._put(id, obj);
	}

	public static Object remove(String id) {
		return _getInstance()._remove(id);
	}

	private static SimpleCachePool _getInstance() {
		if (_instance == null) {
			synchronized (SimpleCachePool.class) {
				if (_instance == null) {
					_instance = new SimpleCachePool();
				}
			}
		}
		return _instance;
	}

	private SimpleCachePool() {
		_scPool = Collections.synchronizedMap(new HashMap<String, Object>(_SIZE));
	}

	private Object _get(String id) {
		return (Object) _scPool.get(id);
	}

	private void _put(String id, Object ds) {
		_scPool.put(id, ds);
	}

	private Object _remove(String id) {
		return _scPool.remove(id);
	}

}