001/*
002 * (C) Copyright 2010 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Nuxeo - initial API and implementation
018 */
019
020package org.nuxeo.runtime.management.metrics;
021
022import org.javasimon.CallbackSkeleton;
023import org.javasimon.Counter;
024import org.javasimon.Simon;
025import org.javasimon.Stopwatch;
026import org.javasimon.jmx.SimonSuperMXBean;
027import org.nuxeo.runtime.management.counters.CounterMXBeanImpl;
028import org.nuxeo.runtime.management.stopwatchs.StopwatchMXBeanImpl;
029
030/**
031 * Callback that registers MXBeans for metrics after their creation.
032 */
033public class MetricRegisteringCallback extends CallbackSkeleton {
034
035    MetricRegister register;
036
037    /**
038     * @param register
039     */
040    public MetricRegisteringCallback(MetricRegister register) {
041        this.register = register;
042    }
043
044    @Override
045    public void simonCreated(Simon simon) {
046        if (simon.getName() == null) {
047            return;
048        }
049        register(simon);
050    }
051
052    @Override
053    public void simonDestroyed(Simon simon) {
054        register.unregisterMXBean(simon.getName());
055    }
056
057    @Override
058    public void clear() {
059        register.unregisterAll();
060    }
061
062    protected final void register(Simon simon) {
063        SimonSuperMXBean mbean;
064        if (simon instanceof Counter) {
065            mbean = new CounterMXBeanImpl((Counter) simon);
066        } else if (simon instanceof Stopwatch) {
067            mbean = new StopwatchMXBeanImpl((Stopwatch) simon);
068        } else {
069            return;
070        }
071        register.registerMXBean(mbean, simon.getName(), mbean.getClass(), mbean.getType());
072    }
073}