MapDBCachePooFactory.java

/*
 * Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software;Designed and Developed mainly by many Chinese 
 * opensource volunteers. you can redistribute it and/or modify it under the 
 * terms of the GNU General Public License version 2 only, as published by the
 * Free Software Foundation.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * 
 * Any questions about this component can be directed to it's project Web address 
 * https://code.google.com/p/opencloudb/.
 *
 */
package io.mycat.cache.impl;

import io.mycat.cache.CachePool;
import io.mycat.cache.CachePoolFactory;

import java.util.concurrent.TimeUnit;

import org.mapdb.DB;
import org.mapdb.DBMaker;
import org.mapdb.HTreeMap;

public class MapDBCachePooFactory extends CachePoolFactory {
	private DB db = DBMaker.newMemoryDirectDB().cacheSize(1000).cacheLRUEnable().make();

	@Override
	public CachePool createCachePool(String poolName, int cacheSize,
			int expiredSeconds) {

		HTreeMap<Object, Object> cache = this.db.createHashMap(poolName)
				.expireMaxSize(cacheSize)
				.expireAfterAccess(expiredSeconds, TimeUnit.SECONDS)
				.makeOrGet();
		return new MapDBCachePool(cache, cacheSize);

	}

}