ActiveMQ example source code file (TraceBrokerPathPlugin.java)

This example ActiveMQ source code file (TraceBrokerPathPlugin.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - ActiveMQ tags/keywords

brokerpath, brokerpluginsupport, brokerpluginsupport, io, ioexception, ioexception, log, logger, setting, setting, string, string, tracebrokerpathplugin, util

The ActiveMQ TraceBrokerPathPlugin.java source code

/**
 * 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.activemq.broker.util;

import java.io.IOException;
import java.util.Map;

import org.apache.activemq.broker.BrokerPluginSupport;
import org.apache.activemq.command.MessageDispatch;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * The TraceBrokerPathPlugin can be used in a network of Brokers. Each Broker 
 * that has the plugin configured, will add it's brokerName to the content 
 * of a JMS Property. If all Brokers have this property enabled, the path the 
 * message actually took through the network can be seen in the defined property.
 * 
 * @org.apache.xbean.XBean element="traceBrokerPathPlugin"
 * 
 * 
 */

public class TraceBrokerPathPlugin extends BrokerPluginSupport {

	private String stampProperty = "BrokerPath";
    private static final Logger LOG = LoggerFactory.getLogger(TraceBrokerPathPlugin.class);
	
	public String getStampProperty() {
		return stampProperty;
	}

	public void setStampProperty(String stampProperty) {
		this.stampProperty = stampProperty;
	}

	public void preProcessDispatch(MessageDispatch messageDispatch) {
		try {
    		String brokerStamp = (String)messageDispatch.getMessage().getProperty(getStampProperty());
    		if (brokerStamp == null) {
    			brokerStamp = getBrokerName();
    		} else {
    			brokerStamp += "," + getBrokerName();
    		}
    		messageDispatch.getMessage().setProperty(getStampProperty(), brokerStamp);
		} catch (IOException ioe) {
			LOG.warn("Setting broker property failed " + ioe, ioe);
		}
		super.preProcessDispatch(messageDispatch);
	}
}