ActiveMQ example source code file (BrokerSupport.java)

This example ActiveMQ source code file (BrokerSupport.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

activemqdestination, activemqdestination, brokersupport, connectioncontext, connectioncontext, exception, exception, message, message, producerbrokerexchange, producerinfo, producerstate

The ActiveMQ BrokerSupport.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.util;

import org.apache.activemq.broker.Broker;
import org.apache.activemq.broker.ConnectionContext;
import org.apache.activemq.broker.ProducerBrokerExchange;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.Message;
import org.apache.activemq.command.ProducerInfo;
import org.apache.activemq.security.SecurityContext;
import org.apache.activemq.state.ProducerState;

/**
 * Utility class for broker operations
 *
 */
public final class BrokerSupport {

    private BrokerSupport() {        
    }
    
    public static void resendNoCopy(final ConnectionContext context, Message originalMessage, ActiveMQDestination deadLetterDestination) throws Exception {
        doResend(context, originalMessage, deadLetterDestination, false);
    }
    
    /**
     * @param context
     * @param originalMessage 
     * @param deadLetterDestination
     * @throws Exception
     */
    public static void resend(final ConnectionContext context, Message originalMessage, ActiveMQDestination deadLetterDestination) throws Exception {
        doResend(context, originalMessage, deadLetterDestination, true);
    }
    
    public static void doResend(final ConnectionContext context, Message originalMessage, ActiveMQDestination deadLetterDestination, boolean copy) throws Exception {       
        Message message = copy ? originalMessage.copy() : originalMessage;
        message.setOriginalDestination(message.getDestination());
        message.setOriginalTransactionId(message.getTransactionId());
        message.setDestination(deadLetterDestination);
        message.setTransactionId(null);
        message.setMemoryUsage(null);
        message.setRedeliveryCounter(0);
        boolean originalFlowControl = context.isProducerFlowControl();
        try {
            context.setProducerFlowControl(false);
            ProducerInfo info = new ProducerInfo();
            ProducerState state = new ProducerState(info);
            ProducerBrokerExchange producerExchange = new ProducerBrokerExchange();
            producerExchange.setProducerState(state);
            producerExchange.setMutable(true);
            producerExchange.setConnectionContext(context);
            context.getBroker().send(producerExchange, message);
        } finally {
            context.setProducerFlowControl(originalFlowControl);
        }
    }

    /**
     * Returns the broker's administration connection context used for
     * configuring the broker at startup
     */
    public static ConnectionContext getConnectionContext(Broker broker) {
        ConnectionContext adminConnectionContext = broker.getAdminConnectionContext();
        if (adminConnectionContext == null) {
            adminConnectionContext = createAdminConnectionContext(broker);
            broker.setAdminConnectionContext(adminConnectionContext);
        }
        return adminConnectionContext;
    }

    /**
     * Factory method to create the new administration connection context
     * object. Note this method is here rather than inside a default broker
     * implementation to ensure that the broker reference inside it is the outer
     * most interceptor
     */
    protected static ConnectionContext createAdminConnectionContext(Broker broker) {
        ConnectionContext context = new ConnectionContext();
        context.setBroker(broker);
        context.setSecurityContext(SecurityContext.BROKER_SECURITY_CONTEXT);
        return context;
    }
}