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    public MetricRegisteringCallback(MetricRegister register) {
038        this.register = register;
039    }
040
041    @Override
042    public void simonCreated(Simon simon) {
043        if (simon.getName() == null) {
044            return;
045        }
046        register(simon);
047    }
048
049    @Override
050    public void simonDestroyed(Simon simon) {
051        register.unregisterMXBean(simon.getName());
052    }
053
054    @Override
055    public void clear() {
056        register.unregisterAll();
057    }
058
059    protected final void register(Simon simon) {
060        SimonSuperMXBean mbean;
061        if (simon instanceof Counter) {
062            mbean = new CounterMXBeanImpl((Counter) simon);
063        } else if (simon instanceof Stopwatch) {
064            mbean = new StopwatchMXBeanImpl((Stopwatch) simon);
065        } else {
066            return;
067        }
068        register.registerMXBean(mbean, simon.getName(), mbean.getClass(), mbean.getType());
069    }
070}