001/*
002 * This library is part of OpenCms -
003 * the Open Source Content Management System
004 *
005 * Copyright (c) Alkacon Software GmbH & Co. KG (https://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: https://www.alkacon.com
019 *
020 * For further information about OpenCms, please see the
021 * project website: https://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.db.timing;
029
030import java.util.concurrent.CopyOnWriteArrayList;
031
032/**
033 * Default profiling handler which only has a single instance and delegates method calls to its
034 * registered child handlers.<p>
035 */
036public class CmsDefaultProfilingHandler implements I_CmsProfilingHandler {
037
038    /** The singleton instance. */
039    public static final CmsDefaultProfilingHandler INSTANCE = new CmsDefaultProfilingHandler();
040
041    /** The list of child handlers. */
042    private CopyOnWriteArrayList<I_CmsProfilingHandler> m_handlers = new CopyOnWriteArrayList<>();
043
044    /**
045     * Hidden default constructor.<p>
046     */
047    protected CmsDefaultProfilingHandler() {
048
049        // do nothing
050    }
051
052    /**
053     * Adds a handler.<p>
054     *
055     * @param handler the handler to add
056     */
057    public void addHandler(I_CmsProfilingHandler handler) {
058
059        m_handlers.add(handler);
060    }
061
062    /**
063     * @see org.opencms.db.timing.I_CmsProfilingHandler#putTime(java.lang.String, long)
064     */
065    public void putTime(String key, long nanos) {
066
067        for (I_CmsProfilingHandler handler : m_handlers) {
068            handler.putTime(key, nanos);
069        }
070    }
071
072    /**
073     * Removes a handler.<p>
074     *
075     * @param handler the handler to remove
076     */
077    public void removeHandler(I_CmsProfilingHandler handler) {
078
079        m_handlers.remove(handler);
080    }
081
082}