/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.aries.jmx.whiteboard;
import javax.management.MBeanServer;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;
import org.osgi.util.tracker.ServiceTracker;
public class Activator implements BundleActivator {
private JmxWhiteboardSupport jmxWhiteBoard;
private ServiceTracker mbeanServerTracker;
private ServiceTracker mbeanTracker;
public void start(BundleContext context) throws Exception {
jmxWhiteBoard = new JmxWhiteboardSupport();
mbeanServerTracker = new MBeanServerTracker(context);
mbeanServerTracker.open();
mbeanTracker = new MBeanTracker(context);
mbeanTracker.open(true);
}
public void stop(BundleContext context) throws Exception {
if (mbeanTracker != null) {
mbeanTracker.close();
mbeanTracker = null;
}
if (mbeanServerTracker != null) {
mbeanServerTracker.close();
mbeanServerTracker = null;
}
jmxWhiteBoard = null;
}
private class MBeanServerTracker extends ServiceTracker {
public MBeanServerTracker(BundleContext context) {
super(context, MBeanServer.class.getName(), null);
}
@Override
public Object addingService(ServiceReference reference) {
MBeanServer mbeanServer = (MBeanServer) super.addingService(reference);
jmxWhiteBoard.addMBeanServer(mbeanServer);
return mbeanServer;
}
@Override
public void removedService(ServiceReference reference, Object service) {
if (service instanceof MBeanServer) {
jmxWhiteBoard.removeMBeanServer((MBeanServer) service);
}
super.removedService(reference, service);
}
}
private class MBeanTracker extends ServiceTracker {
/**
* Listens for any services registered with a "jmx.objectname" service
* property. If the property is not a non-empty String object the service
* is expected to implement the MBeanRegistration interface to create
* the name dynamically.
*/
private static final String SIMPLE_MBEAN_FILTER = "("
+ JmxWhiteboardSupport.PROP_OBJECT_NAME+ "=*)";
public MBeanTracker(BundleContext context)
throws InvalidSyntaxException {
super(context, context.createFilter(SIMPLE_MBEAN_FILTER), null);
}
@Override
public Object addingService(ServiceReference reference) {
Object mbean = super.addingService(reference);
jmxWhiteBoard.registerMBean(mbean, reference);
return mbean;
}
@Override
public void removedService(ServiceReference reference, Object service) {
jmxWhiteBoard.unregisterMBean(service);
super.removedService(reference, service);
}
}
}