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/*
*
* 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.qpid.server.jmx;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.log4j.Logger;
import org.apache.qpid.server.configuration.plugins.ConfigurationPluginFactory;
import org.apache.qpid.server.registry.ApplicationRegistry;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceRegistration;
public class JMXActivator implements BundleActivator
{
private static final Logger LOGGER = Logger.getLogger(JMXActivator.class);
private String _bundleName;
private JMXService _jmxService;
private List<ServiceRegistration> _registeredServices;
public void start(final BundleContext ctx) throws Exception
{
boolean jmxManagementEnabled = ApplicationRegistry.getInstance().getConfiguration().getJMXManagementEnabled();
if (jmxManagementEnabled)
{
_jmxService = new JMXService();
startJmsService(_jmxService);
_bundleName = ctx.getBundle().getSymbolicName();
_registeredServices = registerServices(ctx);
}
else
{
LOGGER.debug("Skipping registration of JMX plugin as JMX Management disabled in config. ");
}
}
public void stop(final BundleContext bundleContext) throws Exception
{
try
{
if (_jmxService != null)
{
if (LOGGER.isInfoEnabled())
{
LOGGER.info("Stopping jmx plugin: " + _bundleName);
}
_jmxService.close();
}
if (_registeredServices != null)
{
unregisterServices();
}
}
finally
{
_jmxService = null;
_registeredServices = null;
}
}
private List<ServiceRegistration> registerServices(BundleContext ctx)
{
if (LOGGER.isInfoEnabled())
{
LOGGER.info("Registering jmx plugin: " + _bundleName);
}
List<ServiceRegistration> serviceRegistrations = new ArrayList<ServiceRegistration>();
ServiceRegistration jmxServiceRegistration = ctx.registerService(JMXService.class.getName(), _jmxService, null);
ServiceRegistration jmxConfigFactoryRegistration = ctx.registerService(ConfigurationPluginFactory.class.getName(), JMXConfiguration.FACTORY, null);
serviceRegistrations.add(jmxServiceRegistration);
serviceRegistrations.add(jmxConfigFactoryRegistration);
return serviceRegistrations;
}
private void startJmsService(JMXService jmxService) throws Exception
{
if (LOGGER.isInfoEnabled())
{
LOGGER.info("Starting JMX service");
}
boolean startedSuccessfully = false;
try
{
jmxService.start();
startedSuccessfully = true;
}
finally
{
if (!startedSuccessfully)
{
LOGGER.error("JMX failed to start normally, closing service");
jmxService.close();
}
}
}
private void unregisterServices()
{
for (Iterator<ServiceRegistration> iterator = _registeredServices.iterator(); iterator.hasNext();)
{
ServiceRegistration service = iterator.next();
service.unregister();
}
}
}
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