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.SimonManager;
023import org.nuxeo.runtime.model.ComponentContext;
024import org.nuxeo.runtime.model.DefaultComponent;
025import org.osgi.framework.BundleContext;
026
027public class MetricComponent extends DefaultComponent {
028
029    protected final MetricSerializer serializer = new MetricSerializer();
030
031    protected final MetricEnabler enabler = new MetricEnabler();
032
033    @Override
034    public <T> T getAdapter(Class<T> adapter) {
035        if (MetricSerializerMXBean.class.isAssignableFrom(adapter)) {
036            return adapter.cast(serializer);
037        }
038        if (MetricEnabler.class.isAssignableFrom(adapter)) {
039            return adapter.cast(enabler);
040        }
041        if (MetricSerializer.class.isAssignableFrom(adapter)) {
042            return adapter.cast(serializer);
043        }
044        return super.getAdapter(adapter);
045    }
046
047    protected final MetricRegister register = new MetricRegister();
048
049    protected final MetricRegisteringCallback registeringCB = new MetricRegisteringCallback(register);
050
051    @Override
052    public void activate(ComponentContext context) {
053        super.activate(context);
054        doStart();
055    }
056
057    @Override
058    public void deactivate(ComponentContext context) {
059        doStop();
060        super.deactivate(context);
061    }
062
063    public void start(BundleContext context) {
064        doStart();
065    }
066
067    public void stop(BundleContext context) {
068        doStop();
069    }
070
071    protected void doStart() {
072        enabler.setSerializer(serializer);
073        SimonManager.enable();
074        SimonManager.callback().addCallback(registeringCB);
075        register.registerMXBean(enabler, "enabler", MetricEnablerMXBean.class, "Feature");
076        register.registerMXBean(serializer, "serializer", MetricSerializerMXBean.class, "Feature");
077    }
078
079    protected void doStop() {
080        SimonManager.disable();
081        if (SimonManager.callback() != null) {
082            SimonManager.callback().removeCallback(registeringCB);
083        }
084        register.unregisterAll();
085    }
086
087}