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.broker.region.policy;
018    
019    import org.apache.activemq.broker.region.MessageReference;
020    import org.apache.activemq.broker.region.Subscription;
021    import org.apache.activemq.command.ActiveMQDestination;
022    import org.apache.activemq.command.Message;
023    
024    /**
025     * A strategy for choosing which destination is used for dead letter queue messages.
026     * 
027     * 
028     */
029    public interface DeadLetterStrategy {
030        
031        /**
032         * Allow pluggable strategy for deciding if message should be sent to a dead letter queue
033         * for example, you might not want to ignore expired or non-persistent messages
034         * @param message
035         * @return true if message should be sent to a dead letter queue
036         */
037        boolean isSendToDeadLetterQueue(Message message);
038    
039        /**
040         * Returns the dead letter queue for the given message and subscription.
041         */
042        ActiveMQDestination getDeadLetterQueueFor(Message message, Subscription subscription);
043    
044        /**
045         * @return true if processes expired messages
046         */
047        public boolean isProcessExpired() ;
048    
049        /**
050         * @param processExpired the processExpired to set
051         */
052        public void setProcessExpired(boolean processExpired);
053    
054        /**
055         * @return the processNonPersistent
056         */
057        public boolean isProcessNonPersistent();
058    
059        /**
060         * @param processNonPersistent the processNonPersistent to set
061         */
062        public void setProcessNonPersistent(boolean processNonPersistent);
063    
064    }