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.activemq.broker.region.policy;
018
019import org.apache.activemq.ActiveMQMessageAudit;
020import org.apache.activemq.broker.region.MessageReference;
021import org.apache.activemq.broker.region.Subscription;
022import org.apache.activemq.command.ActiveMQDestination;
023import org.apache.activemq.command.Message;
024import org.slf4j.Logger;
025import org.slf4j.LoggerFactory;
026
027/**
028 * A strategy for choosing which destination is used for dead letter queue
029 * messages.
030 * 
031 * 
032 */
033public abstract class AbstractDeadLetterStrategy implements DeadLetterStrategy {
034    private static final Logger LOG = LoggerFactory.getLogger(AbstractDeadLetterStrategy.class);
035    private boolean processNonPersistent = false;
036    private boolean processExpired = true;
037    private ActiveMQMessageAudit audit = new ActiveMQMessageAudit();
038
039    public boolean isSendToDeadLetterQueue(Message message) {
040        boolean result = false;
041        if (message != null) {
042            result = true;
043            if (audit.isDuplicate(message)) {
044                result = false;
045                if (LOG.isDebugEnabled()) {
046                    LOG.debug("Not adding duplicate to DLQ: " + message.getMessageId() + ", dest: " + message.getDestination());
047                }
048            }
049            if (!message.isPersistent() && !processNonPersistent) {
050                result = false;
051            }
052            if (message.isExpired() && !processExpired) {
053                result = false;
054            }
055        }
056        return result;
057    }
058
059    /**
060     * @return the processExpired
061     */
062    public boolean isProcessExpired() {
063        return this.processExpired;
064    }
065
066    /**
067     * @param processExpired the processExpired to set
068     */
069    public void setProcessExpired(boolean processExpired) {
070        this.processExpired = processExpired;
071    }
072
073    /**
074     * @return the processNonPersistent
075     */
076    public boolean isProcessNonPersistent() {
077        return this.processNonPersistent;
078    }
079
080    /**
081     * @param processNonPersistent the processNonPersistent to set
082     */
083    public void setProcessNonPersistent(boolean processNonPersistent) {
084        this.processNonPersistent = processNonPersistent;
085    }
086
087}