001/*
002 * (C) Copyright 2010 Nuxeo SAS (http://nuxeo.com/) and contributors.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Nuxeo - initial API and implementation
016 */
017
018package org.nuxeo.runtime.management.metrics;
019
020import org.javasimon.CallbackSkeleton;
021import org.javasimon.Counter;
022import org.javasimon.Simon;
023import org.javasimon.Stopwatch;
024import org.javasimon.jmx.SimonSuperMXBean;
025import org.nuxeo.runtime.management.counters.CounterMXBeanImpl;
026import org.nuxeo.runtime.management.stopwatchs.StopwatchMXBeanImpl;
027
028/**
029 * Callback that registers MXBeans for metrics after their creation.
030 */
031public class MetricRegisteringCallback extends CallbackSkeleton {
032
033    MetricRegister register;
034
035    /**
036     * @param register
037     */
038    public MetricRegisteringCallback(MetricRegister register) {
039        this.register = register;
040    }
041
042    @Override
043    public void simonCreated(Simon simon) {
044        if (simon.getName() == null) {
045            return;
046        }
047        register(simon);
048    }
049
050    @Override
051    public void simonDestroyed(Simon simon) {
052        register.unregisterMXBean(simon.getName());
053    }
054
055    @Override
056    public void clear() {
057        register.unregisterAll();
058    }
059
060    protected final void register(Simon simon) {
061        SimonSuperMXBean mbean;
062        if (simon instanceof Counter) {
063            mbean = new CounterMXBeanImpl((Counter) simon);
064        } else if (simon instanceof Stopwatch) {
065            mbean = new StopwatchMXBeanImpl((Stopwatch) simon);
066        } else {
067            return;
068        }
069        register.registerMXBean(mbean, simon.getName(), mbean.getClass(), mbean.getType());
070    }
071}