001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.camel.management; 018 019import java.util.EventObject; 020import java.util.concurrent.atomic.AtomicLong; 021import javax.management.Notification; 022import javax.management.NotificationBroadcasterSupport; 023 024import org.apache.camel.api.management.JmxNotificationBroadcasterAware; 025import org.apache.camel.spi.EventNotifier; 026import org.apache.camel.support.EventNotifierSupport; 027import org.slf4j.Logger; 028import org.slf4j.LoggerFactory; 029 030/** 031 * A JMX based {@link EventNotifier} which broadcasts JMX {@link Notification}s. 032 * 033 * @version 034 */ 035public class JmxNotificationEventNotifier extends EventNotifierSupport implements JmxNotificationBroadcasterAware { 036 private static final Logger LOG = LoggerFactory.getLogger(JmxNotificationEventNotifier.class); 037 private final AtomicLong counter = new AtomicLong(); 038 private NotificationBroadcasterSupport notificationBroadcaster; 039 private String source = "Camel"; 040 041 public void setNotificationBroadcaster(NotificationBroadcasterSupport broadcaster) { 042 notificationBroadcaster = broadcaster; 043 } 044 045 public void notify(EventObject event) throws Exception { 046 if (notificationBroadcaster != null) { 047 // its recommended to send light weight events and we don't want to have the entire Exchange/CamelContext etc 048 // serialized as these are the typical source of the EventObject. So we use our own source which is just 049 // a human readable name, which can be configured. 050 String type = event.getClass().getSimpleName(); 051 String message = event.toString(); 052 Notification notification = new Notification(type, source, counter.getAndIncrement(), message); 053 054 LOG.trace("Broadcasting JMX notification: {}", notification); 055 notificationBroadcaster.sendNotification(notification); 056 } 057 } 058 059 public boolean isEnabled(EventObject event) { 060 return true; 061 } 062 063 protected void doStart() throws Exception { 064 counter.set(0); 065 } 066 067 protected void doStop() throws Exception { 068 // noop 069 } 070 071 public String getSource() { 072 return source; 073 } 074 075 /** 076 * Sets the source to be used when broadcasting events. 077 * The source is just a readable identifier which helps the receiver see where the event is coming from. 078 * You can assign a value such a server or application name etc. 079 * <p/> 080 * By default <tt>Camel</tt> will be used as source. 081 * 082 * @param source the source 083 */ 084 public void setSource(String source) { 085 this.source = source; 086 } 087}