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Glassfish example source code file (BoundedPool.java)
The Glassfish BoundedPool.java source code/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * 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. * * When distributing the software, include this License Header Notice in each * file and include the License file at packager/legal/LICENSE.txt. * * GPL Classpath Exception: * Oracle designates this particular file as subject to the "Classpath" * exception as provided by Oracle in the GPL Version 2 section of the License * file that accompanied this code. * * Modifications: * If applicable, add the following below the License Header, with the fields * enclosed by brackets [] replaced by your own identifying information: * "Portions Copyright [year] [name of copyright owner]" * * Contributor(s): * If you wish your version of this file to be governed by only the CDDL or * only the GPL Version 2, indicate your decision by adding "[Contributor] * elects to include this software in this distribution under the [CDDL or GPL * Version 2] license." If you don't indicate a single choice of license, a * recipient has the option to distribute your version of this file under * either the CDDL, the GPL Version 2 or to extend the choice of license to * its licensees as provided above. However, if you add GPL Version 2 code * and therefore, elected the GPL Version 2 license, then the option applies * only if the new code is made subject to such option by the copyright * holder. */ /** * <BR> $Source: /cvs/glassfish/appserv-core/src/java/com/sun/ejb/containers/util/pool/BoundedPool.java,v $ * @author $Author: mk111283 $ * @version $Revision: 1.4 $ $Date: 2006/12/23 13:48:57 $ */ package com.sun.ejb.containers.util.pool; import java.util.Collection; import java.util.ArrayList; import java.util.logging.*; import com.sun.logging.*; /** * <p>Abstract pool provides the basic implementation of an object pool. * The implementation uses a linked list to maintain a list of (available) * objects. If the pool is empty it simply creates one using the * ObjectFactory instance. Subclasses can change this behaviour by overriding * getObject(...) and returnObject(....) methods. This class provides basic * support for synchronization, event notification, pool shutdown and pool * object recycling. It also does some very basic bookkeeping like the * number of objects created, number of threads waiting for object. * <p> Subclasses can make use of these book-keeping data to provide complex * pooling mechanism like LRU / MRU / Random. Also, note that AbstractPool * does not have a notion of pool limit. It is upto to the derived classes * to implement these features. * */ public class BoundedPool extends AbstractPool { protected int previousSize = 0; public BoundedPool(ObjectFactory factory, long beanId, int steadyPoolSize, int resizeQuantity, int maxPoolsize, long maxWaitTimeInMillis, int idleTimeoutInSeconds, ClassLoader loader) { super(factory, beanId, steadyPoolSize, resizeQuantity, maxPoolsize, maxWaitTimeInMillis, idleTimeoutInSeconds, loader); super.poolName="BoundedPool"; } protected void removeIdleObjects() { int curSize = 0; int count = 0; synchronized (list) { curSize = list.size(); } if(curSize <= steadyPoolSize) return; // no need to trim the pool beyond steadyPoolSize count = (curSize > (steadyPoolSize + resizeQuantity) ) ? resizeQuantity: (curSize - steadyPoolSize); previousSize = curSize; if (count > 0) { _logger.log(Level.FINE, "BoundedPool removing " + count + " objects"); super.remove(count); } } } Other Glassfish examples (source code examples)Here is a short list of links related to this Glassfish BoundedPool.java source code file: |
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