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 boolean enableAudit = true;
038    private ActiveMQMessageAudit messageAudit = new ActiveMQMessageAudit();
039
040    public boolean isSendToDeadLetterQueue(Message message) {
041        boolean result = false;
042        if (message != null) {
043            result = true;
044            if (enableAudit && messageAudit.isDuplicate(message)) {
045                result = false;
046                if (LOG.isDebugEnabled()) {
047                    LOG.debug("Not adding duplicate to DLQ: " + message.getMessageId() + ", dest: " + message.getDestination());
048                }
049            }
050            if (!message.isPersistent() && !processNonPersistent) {
051                result = false;
052            }
053            if (message.isExpired() && !processExpired) {
054                result = false;
055            }
056        }
057        return result;
058    }
059
060    /**
061     * @return the processExpired
062     */
063    public boolean isProcessExpired() {
064        return this.processExpired;
065    }
066
067    /**
068     * @param processExpired the processExpired to set
069     */
070    public void setProcessExpired(boolean processExpired) {
071        this.processExpired = processExpired;
072    }
073
074    /**
075     * @return the processNonPersistent
076     */
077    public boolean isProcessNonPersistent() {
078        return this.processNonPersistent;
079    }
080
081    /**
082     * @param processNonPersistent the processNonPersistent to set
083     */
084    public void setProcessNonPersistent(boolean processNonPersistent) {
085        this.processNonPersistent = processNonPersistent;
086    }
087
088    public boolean isEnableAudit() {
089        return enableAudit;
090    }
091
092    public void setEnableAudit(boolean enableAudit) {
093        this.enableAudit = enableAudit;
094    }
095}