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     */
017    package org.apache.activemq.util;
018    
019    import org.apache.activemq.broker.Broker;
020    import org.apache.activemq.broker.ConnectionContext;
021    import org.apache.activemq.broker.ProducerBrokerExchange;
022    import org.apache.activemq.command.ActiveMQDestination;
023    import org.apache.activemq.command.Message;
024    import org.apache.activemq.command.ProducerInfo;
025    import org.apache.activemq.security.SecurityContext;
026    import org.apache.activemq.state.ProducerState;
027    
028    /**
029     * Utility class for broker operations
030     *
031     */
032    public final class BrokerSupport {
033    
034        private BrokerSupport() {        
035        }
036        
037        public static void resendNoCopy(final ConnectionContext context, Message originalMessage, ActiveMQDestination deadLetterDestination) throws Exception {
038            doResend(context, originalMessage, deadLetterDestination, false);
039        }
040        
041        /**
042         * @param context
043         * @param originalMessage 
044         * @param deadLetterDestination
045         * @throws Exception
046         */
047        public static void resend(final ConnectionContext context, Message originalMessage, ActiveMQDestination deadLetterDestination) throws Exception {
048            doResend(context, originalMessage, deadLetterDestination, true);
049        }
050        
051        public static void doResend(final ConnectionContext context, Message originalMessage, ActiveMQDestination deadLetterDestination, boolean copy) throws Exception {       
052            Message message = copy ? originalMessage.copy() : originalMessage;
053            message.setOriginalDestination(message.getDestination());
054            message.setOriginalTransactionId(message.getTransactionId());
055            message.setDestination(deadLetterDestination);
056            message.setTransactionId(null);
057            message.setMemoryUsage(null);
058            message.setRedeliveryCounter(0);
059            boolean originalFlowControl = context.isProducerFlowControl();
060            try {
061                context.setProducerFlowControl(false);
062                ProducerInfo info = new ProducerInfo();
063                ProducerState state = new ProducerState(info);
064                ProducerBrokerExchange producerExchange = new ProducerBrokerExchange();
065                producerExchange.setProducerState(state);
066                producerExchange.setMutable(true);
067                producerExchange.setConnectionContext(context);
068                context.getBroker().send(producerExchange, message);
069            } finally {
070                context.setProducerFlowControl(originalFlowControl);
071            }
072        }
073    
074        /**
075         * Returns the broker's administration connection context used for
076         * configuring the broker at startup
077         */
078        public static ConnectionContext getConnectionContext(Broker broker) {
079            ConnectionContext adminConnectionContext = broker.getAdminConnectionContext();
080            if (adminConnectionContext == null) {
081                adminConnectionContext = createAdminConnectionContext(broker);
082                broker.setAdminConnectionContext(adminConnectionContext);
083            }
084            return adminConnectionContext;
085        }
086    
087        /**
088         * Factory method to create the new administration connection context
089         * object. Note this method is here rather than inside a default broker
090         * implementation to ensure that the broker reference inside it is the outer
091         * most interceptor
092         */
093        protected static ConnectionContext createAdminConnectionContext(Broker broker) {
094            ConnectionContext context = new ConnectionContext();
095            context.setBroker(broker);
096            context.setSecurityContext(SecurityContext.BROKER_SECURITY_CONTEXT);
097            return context;
098        }
099    }