/*

 * Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package com.sun.jndi.ldap.pool;

/**

 * Thread that wakes up periodically and closes expired, unused connections.

 *

 * @author Rosanna Lee

 */

final public class PoolCleaner implements Runnable {

    final private Pool[] pools;

    final private long period;

    /**

     * @param period ms to wait between cleaning

     * @param pools non-null array of Pools to clean

     */

    public PoolCleaner(long period, Pool[] pools) {

        super();

        this.period = period;

        this.pools = pools.clone();

    }

    @Override

    public void run() {

        long threshold;

        while (true) {

            synchronized (this) {

                // Wait for duration of period ms

                try {

                    wait(period);

                } catch (InterruptedException ignore) {

                }

                // Connections idle since threshold have expired

                threshold = System.currentTimeMillis() - period;

                for (int i = 0; i < pools.length; i++) {

                    if (pools[i] != null) {

                        pools[i].expire(threshold);

                    }

                }

            }

        }

    }

}