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}