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.ActiveMQMessageAudit; 020 import org.apache.activemq.broker.region.MessageReference; 021 import org.apache.activemq.broker.region.Subscription; 022 import org.apache.activemq.command.ActiveMQDestination; 023 import org.apache.activemq.command.Message; 024 import org.slf4j.Logger; 025 import org.slf4j.LoggerFactory; 026 027 /** 028 * A strategy for choosing which destination is used for dead letter queue 029 * messages. 030 * 031 * 032 */ 033 public 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 }