001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.events;
016    
017    import com.liferay.portal.kernel.events.SessionAction;
018    import com.liferay.portal.kernel.log.Log;
019    import com.liferay.portal.kernel.log.LogFactoryUtil;
020    
021    import java.text.NumberFormat;
022    
023    import javax.servlet.http.HttpSession;
024    
025    /**
026     * @author Brian Wing Shun Chan
027     */
028    public class GarbageCollectorAction extends SessionAction {
029    
030            @Override
031            public void run(HttpSession session) {
032                    Runtime runtime = Runtime.getRuntime();
033    
034                    NumberFormat nf = NumberFormat.getInstance();
035    
036                    if (_log.isDebugEnabled()) {
037                            _log.debug(
038                                    "Before:\t\t" +
039                                            nf.format(runtime.freeMemory()) + "\t" +
040                                                    nf.format(runtime.totalMemory()) + "\t" +
041                                                            nf.format(runtime.maxMemory()));
042                    }
043    
044                    System.gc();
045    
046                    if (_log.isDebugEnabled()) {
047                            _log.debug(
048                                    "After:\t\t" +
049                                            nf.format(runtime.freeMemory()) + "\t" +
050                                                    nf.format(runtime.totalMemory()) + "\t" +
051                                                            nf.format(runtime.maxMemory()));
052                    }
053            }
054    
055            private static Log _log = LogFactoryUtil.getLog(
056                    GarbageCollectorAction.class);
057    
058    }