/**
* 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.geronimo.concurrent.impl;
import java.util.concurrent.atomic.AtomicInteger;
import javax.management.Notification;
import javax.management.NotificationBroadcasterSupport;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.geronimo.gbean.AbstractName;
import org.apache.geronimo.kernel.Kernel;
import org.apache.geronimo.system.jmx.MBeanServerKernelBridge;
public class NotificationHelper {
private final static Log LOG = LogFactory.getLog(NotificationHelper.class);
private AtomicInteger notificationSequence = new AtomicInteger(1);
private NotificationBroadcasterSupport notificationBroadcasterSupport;
private String objectName;
public NotificationHelper(Kernel kernel, AbstractName name) {
this.notificationBroadcasterSupport = getNotificationBroadcasterSupport(kernel, name);
this.objectName = name.getObjectName().getCanonicalName();
}
private static NotificationBroadcasterSupport getNotificationBroadcasterSupport(Kernel kernel,
AbstractName name) {
try {
MBeanServerKernelBridge bridge =
(MBeanServerKernelBridge)kernel.getGBean(MBeanServerKernelBridge.class);
return bridge.getNotificationBroadcasterSupport(name);
} catch (Exception e) {
LOG.debug("Failed to lookup MBeanServerKernelBridge", e);
return null;
}
}
public boolean isNotificationSupported() {
return (this.notificationBroadcasterSupport != null);
}
public void sendNotification(String type, Object userData) {
if (!isNotificationSupported()) {
return;
}
Notification notification = new Notification(type,
this.objectName,
this.notificationSequence.getAndIncrement());
notification.setUserData(userData);
this.notificationBroadcasterSupport.sendNotification(notification);
}
}