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package com.sun.appserv.management.util.jmx;
import java.io.IOException;
import javax.management.ObjectName;
import javax.management.Notification;
import javax.management.NotificationListener;
import javax.management.NotificationFilter;
import javax.management.MBeanServerNotification;
import javax.management.MBeanServerConnection;
import javax.management.InstanceNotFoundException;
import com.sun.appserv.management.base.AMXRootLogger;
/**
Convenience base class for listening to
{@link MBeanServerNotification} notifications.
A class extending this class must implement {@link #mbeanRegistered}
and {@link #mbeanUnregistered}.
<p>
The class is designed to start listening upon creation.
The caller should call cleanup() when listening is no longer
desired. Once cleanup() is called, no further listening can
be done; a new MBeanRegistrationListener should be instantiated
if further listening is desired.
*/
public abstract class MBeanRegistrationListener extends NotificationListenerBase
{
private final ObjectName mRegUnregFilter;
private final String mDefaultDomain;
/**
If 'constrain' is non-null, then all registration and unregistration
events will be filtered through it. Only those MBeans
matching will be passed through to {@link #mbeanRegistered}
and {@link #mbeanUnregistered}.
@param conn
@param constrain optional fixed or pattern ObjectName
*/
protected
MBeanRegistrationListener(
final String name,
final MBeanServerConnection conn,
final ObjectName constrain )
throws InstanceNotFoundException, IOException
{
super( name, conn, JMXUtil.getMBeanServerDelegateObjectName() );
mRegUnregFilter = constrain;
mDefaultDomain = conn.getDefaultDomain();
}
/**
Calls this( conn, null ).
@param conn
*/
protected
MBeanRegistrationListener(
final String name,
final MBeanServerConnection conn)
throws InstanceNotFoundException, IOException
{
this( name, conn, (ObjectName)null );
}
protected abstract void mbeanRegistered( final ObjectName objectName );
protected abstract void mbeanUnregistered( final ObjectName objectName );
public void
handleNotification( final Notification notifIn, final Object handback)
{
if ( ! (notifIn instanceof MBeanServerNotification) )
{
throw new IllegalArgumentException( notifIn.toString() );
}
final MBeanServerNotification notif = (MBeanServerNotification)notifIn;
final ObjectName objectName = notif.getMBeanName();
final String type = notif.getType();
final boolean matchesFilter = (mRegUnregFilter == null) ||
JMXUtil.matchesPattern( mDefaultDomain, mRegUnregFilter, objectName );
if ( matchesFilter )
{
if ( type.equals( MBeanServerNotification.REGISTRATION_NOTIFICATION ) )
{
mbeanRegistered( objectName );
}
else if ( type.equals( MBeanServerNotification.UNREGISTRATION_NOTIFICATION ) )
{
mbeanUnregistered( objectName );
}
}
}
}