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.command.Message; 021import org.slf4j.Logger; 022import org.slf4j.LoggerFactory; 023 024/** 025 * A strategy for choosing which destination is used for dead letter queue 026 * messages. 027 * 028 */ 029public abstract class AbstractDeadLetterStrategy implements DeadLetterStrategy { 030 private static final Logger LOG = LoggerFactory.getLogger(AbstractDeadLetterStrategy.class); 031 private boolean processNonPersistent = false; 032 private boolean processExpired = true; 033 private boolean enableAudit = true; 034 private final ActiveMQMessageAudit messageAudit = new ActiveMQMessageAudit(); 035 private long expiration; 036 037 @Override 038 public void rollback(Message message) { 039 if (message != null && this.enableAudit) { 040 messageAudit.rollback(message); 041 } 042 } 043 044 @Override 045 public boolean isSendToDeadLetterQueue(Message message) { 046 boolean result = false; 047 if (message != null) { 048 result = true; 049 if (enableAudit && messageAudit.isDuplicate(message)) { 050 result = false; 051 LOG.debug("Not adding duplicate to DLQ: {}, dest: {}", message.getMessageId(), message.getDestination()); 052 } 053 if (!message.isPersistent() && !processNonPersistent) { 054 result = false; 055 } 056 if (message.isExpired() && !processExpired) { 057 result = false; 058 } 059 } 060 return result; 061 } 062 063 /** 064 * @return the processExpired 065 */ 066 @Override 067 public boolean isProcessExpired() { 068 return this.processExpired; 069 } 070 071 /** 072 * @param processExpired the processExpired to set 073 */ 074 @Override 075 public void setProcessExpired(boolean processExpired) { 076 this.processExpired = processExpired; 077 } 078 079 /** 080 * @return the processNonPersistent 081 */ 082 @Override 083 public boolean isProcessNonPersistent() { 084 return this.processNonPersistent; 085 } 086 087 /** 088 * @param processNonPersistent the processNonPersistent to set 089 */ 090 @Override 091 public void setProcessNonPersistent(boolean processNonPersistent) { 092 this.processNonPersistent = processNonPersistent; 093 } 094 095 public boolean isEnableAudit() { 096 return enableAudit; 097 } 098 099 public void setEnableAudit(boolean enableAudit) { 100 this.enableAudit = enableAudit; 101 } 102 103 public long getExpiration() { 104 return expiration; 105 } 106 107 public void setExpiration(long expiration) { 108 this.expiration = expiration; 109 } 110}