Glassfish example source code file (DefaultPoolWaitQueue.java)

This example Glassfish source code file (DefaultPoolWaitQueue.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

collection, defaultpoolwaitqueue, defaultpoolwaitqueue, initializing, initializing, linkedlist, linkedlist, log, logger, logging, object, object, pool, poolwaitqueue, queue, util, wait

The Glassfish DefaultPoolWaitQueue.java source code

/*
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 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
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 * file and include the License file at packager/legal/LICENSE.txt.
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 *
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package com.sun.enterprise.resource.pool.waitqueue;

import com.sun.logging.LogDomains;

import java.util.Collection;
import java.util.LinkedList;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Default wait queue for the connection pool
 *
 * @author Jagadish Ramu
 */
public class DefaultPoolWaitQueue implements PoolWaitQueue {

    private LinkedList list;
    protected final static Logger _logger = LogDomains.getLogger(DefaultPoolWaitQueue.class, LogDomains.RSR_LOGGER);

    private void initializeDefaultQueue() {
        list = new LinkedList();
        debug("Initializing default Pool Wait Queue");
    }

    public DefaultPoolWaitQueue() {
        initializeDefaultQueue();
    }

    public synchronized int getQueueLength() {
        return list.size();
    }

    public synchronized Object addToQueue() {

        Object waitMonitor = new Object();
        list.addLast(waitMonitor);
        return waitMonitor;
    }

    public synchronized boolean removeFromQueue(Object o) {
        return list.remove(o);
    }

/*
    public synchronized Object removeFirst() {
        return list.removeFirst();
    }
*/

    public synchronized Object remove() {
        return list.removeFirst();
    }

    public Object peek() {
        Object result = null;
        if (list.size() > 0) {
            result = list.get(0);
        }
        return result;
    }

    public Collection getQueueContents() {
        return list;
    }

    protected void debug(String debugStatement) {
        if(_logger.isLoggable(Level.FINE)) {
            _logger.log(Level.FINE, debugStatement);
        }
    }
}