001/*
002 * This library is part of OpenCms -
003 * the Open Source Content Management System
004 *
005 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * For further information about Alkacon Software, please see the
018 * company website: http://www.alkacon.com
019 *
020 * For further information about OpenCms, please see the
021 * project website: http://www.opencms.org
022 *
023 * You should have received a copy of the GNU Lesser General Public
024 * License along with this library; if not, write to the Free Software
025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
026 */
027
028package org.opencms.mx;
029
030import org.opencms.main.OpenCmsServlet;
031import org.opencms.main.OpenCmsServlet.RequestInfo;
032
033import java.lang.management.ManagementFactory;
034import java.util.ArrayList;
035import java.util.List;
036
037import javax.management.MBeanServer;
038import javax.management.ObjectName;
039
040/**
041 * Bean for special diagnostic information retrievable via JMX.
042 */
043public class CmsDiagnosticsMXBean implements I_CmsDiagnosticsMXBean {
044
045    /** The instance. */
046    public static final CmsDiagnosticsMXBean INSTANCE = new CmsDiagnosticsMXBean();
047
048    /**
049     * Registers an MBean of this class.
050     *
051     * @throws Exception if registration fails
052     */
053    public static void register() throws Exception {
054
055        MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
056        ObjectName mxbeanName = new ObjectName("org.opencms.mx:type=CmsDiagnosticsMXBean");
057        mbs.registerMBean(INSTANCE, mxbeanName);
058    }
059
060    /**
061     * @see org.opencms.mx.I_CmsDiagnosticsMXBean#listActiveRequests()
062     */
063    public String listActiveRequests() {
064
065        List<RequestInfo> infos = new ArrayList<>(OpenCmsServlet.activeRequests.values());
066        long now = System.currentTimeMillis();
067        infos.sort((a, b) -> Long.compare(a.getStartTime(), b.getStartTime()));
068        StringBuilder result = new StringBuilder();
069        for (RequestInfo info : infos) {
070            String line = "(#" + info.getThreadId() + ") " + info.getUri() + " " + (now - info.getStartTime());
071            result.append(line);
072            result.append("\n");
073        }
074        return result.toString();
075    }
076
077}