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.broker.region.DurableTopicSubscription; 020 import org.apache.activemq.broker.region.Subscription; 021 import org.apache.activemq.command.ActiveMQDestination; 022 import org.apache.activemq.command.ActiveMQQueue; 023 import org.apache.activemq.command.ActiveMQTopic; 024 import org.apache.activemq.command.Message; 025 026 /** 027 * A {@link DeadLetterStrategy} where each destination has its own individual 028 * DLQ using the subject naming hierarchy. 029 * 030 * @org.apache.xbean.XBean 031 * 032 */ 033 public class IndividualDeadLetterStrategy extends AbstractDeadLetterStrategy { 034 035 private String topicPrefix = "ActiveMQ.DLQ.Topic."; 036 private String queuePrefix = "ActiveMQ.DLQ.Queue."; 037 private boolean useQueueForQueueMessages = true; 038 private boolean useQueueForTopicMessages = true; 039 private boolean destinationPerDurableSubscriber; 040 041 public ActiveMQDestination getDeadLetterQueueFor(Message message, 042 Subscription subscription) { 043 if (message.getDestination().isQueue()) { 044 return createDestination(message, queuePrefix, useQueueForQueueMessages, subscription); 045 } else { 046 return createDestination(message, topicPrefix, useQueueForTopicMessages, subscription); 047 } 048 } 049 050 // Properties 051 // ------------------------------------------------------------------------- 052 053 public String getQueuePrefix() { 054 return queuePrefix; 055 } 056 057 /** 058 * Sets the prefix to use for all dead letter queues for queue messages 059 */ 060 public void setQueuePrefix(String queuePrefix) { 061 this.queuePrefix = queuePrefix; 062 } 063 064 public String getTopicPrefix() { 065 return topicPrefix; 066 } 067 068 /** 069 * Sets the prefix to use for all dead letter queues for topic messages 070 */ 071 public void setTopicPrefix(String topicPrefix) { 072 this.topicPrefix = topicPrefix; 073 } 074 075 public boolean isUseQueueForQueueMessages() { 076 return useQueueForQueueMessages; 077 } 078 079 /** 080 * Sets whether a queue or topic should be used for queue messages sent to a 081 * DLQ. The default is to use a Queue 082 */ 083 public void setUseQueueForQueueMessages(boolean useQueueForQueueMessages) { 084 this.useQueueForQueueMessages = useQueueForQueueMessages; 085 } 086 087 public boolean isUseQueueForTopicMessages() { 088 return useQueueForTopicMessages; 089 } 090 091 /** 092 * Sets whether a queue or topic should be used for topic messages sent to a 093 * DLQ. The default is to use a Queue 094 */ 095 public void setUseQueueForTopicMessages(boolean useQueueForTopicMessages) { 096 this.useQueueForTopicMessages = useQueueForTopicMessages; 097 } 098 099 public boolean isDestinationPerDurableSubscriber() { 100 return destinationPerDurableSubscriber; 101 } 102 103 /** 104 * sets whether durable topic subscriptions are to get individual dead letter destinations. 105 * When true, the DLQ is of the form 'topicPrefix.clientId:subscriptionName' 106 * The default is false. 107 * @param destinationPerDurableSubscriber 108 */ 109 public void setDestinationPerDurableSubscriber(boolean destinationPerDurableSubscriber) { 110 this.destinationPerDurableSubscriber = destinationPerDurableSubscriber; 111 } 112 113 // Implementation methods 114 // ------------------------------------------------------------------------- 115 protected ActiveMQDestination createDestination(Message message, 116 String prefix, 117 boolean useQueue, 118 Subscription subscription ) { 119 String name = prefix + message.getDestination().getPhysicalName(); 120 if (destinationPerDurableSubscriber && subscription instanceof DurableTopicSubscription) { 121 name += "." + ((DurableTopicSubscription)subscription).getSubscriptionKey(); 122 } 123 if (useQueue) { 124 return new ActiveMQQueue(name); 125 } else { 126 return new ActiveMQTopic(name); 127 } 128 } 129 130 }