/*
* JBoss, Home of Professional Open Source.
* Copyright 2010, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.jmx;
import static org.jboss.as.jmx.JmxLogger.ROOT_LOGGER;
import static org.jboss.as.jmx.JmxMessages.MESSAGES;
import java.lang.management.ManagementFactory;
import javax.management.MBeanServer;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import org.jboss.msc.inject.Injector;
import org.jboss.msc.service.Service;
import org.jboss.msc.service.ServiceName;
import org.jboss.msc.service.StartContext;
import org.jboss.msc.service.StartException;
import org.jboss.msc.service.StopContext;
import org.jboss.msc.value.InjectedValue;
import org.jboss.msc.value.Value;
/**
* Service used to register and unregister an mbean with an mbean server.
*
* @author John Bailey
*/
public class MBeanRegistrationService<T> implements Service<Void> {
public static final ServiceName SERVICE_NAME = ServiceName.JBOSS.append("mbean", "registration");
private final InjectedValue<MBeanServer> injectedMBeanServer = new InjectedValue<MBeanServer>();
private final InjectedValue<T> value = new InjectedValue<T>();
private final String name;
private ObjectName objectName;
/**
* Create an instance.
*
* @param name The name to use as an ObjectName
*/
public MBeanRegistrationService(final String name) {
this.name = name;
}
/**
* Create an instance.
*
* @param name The name to use as an ObjectName
* @param value The object to register
*/
public MBeanRegistrationService(final String name, final Value<T> value) {
this.name = name;
this.value.inject(value.getValue());
}
/**
* Register the mbean with the mbean server.
*
* @param context The start context
* @throws StartException If any registration problems occur
*/
public synchronized void start(final StartContext context) throws StartException {
final MBeanServer mBeanServer = getMBeanServer();
final T value = this.value.getValue();
try {
objectName = new ObjectName(name);
} catch (MalformedObjectNameException e) {
throw MESSAGES.mbeanRegistrationFailed(e, name);
}
try {
ROOT_LOGGER.debugf("Registering [%s] with name [%s]", value, objectName);
mBeanServer.registerMBean(value, objectName);
} catch (Exception e) {
throw MESSAGES.mbeanRegistrationFailed(e, name);
}
}
/**
* Unregister the mbean from the mbean server.
*
* @param context The stop context
*/
public synchronized void stop(StopContext context) {
if(objectName == null){
ROOT_LOGGER.cannotUnregisterObject();
}
final MBeanServer mBeanServer = getMBeanServer();
try {
mBeanServer.unregisterMBean(objectName);
} catch (Exception e) {
ROOT_LOGGER.unregistrationFailure(e, objectName);
}
}
/** {@inheritDoc} */
public Void getValue() throws IllegalStateException {
return null;
}
public Injector<MBeanServer> getMBeanServerInjector() {
return injectedMBeanServer;
}
public Injector<T> getValueInjector() {
return value;
}
private MBeanServer getMBeanServer() {
MBeanServer mBeanServer = injectedMBeanServer.getOptionalValue();
if(mBeanServer == null) {
mBeanServer = ManagementFactory.getPlatformMBeanServer();
}
return mBeanServer;
}
}