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.broker.region.MessageReference; 020import org.apache.activemq.broker.region.Subscription; 021import org.apache.activemq.command.ActiveMQDestination; 022import org.apache.activemq.command.Message; 023 024/** 025 * A strategy for choosing which destination is used for dead letter queue messages. 026 * 027 * 028 */ 029public interface DeadLetterStrategy { 030 031 /** 032 * Allow pluggable strategy for deciding if message should be sent to a dead letter queue 033 * for example, you might not want to ignore expired or non-persistent messages 034 * @param message 035 * @return true if message should be sent to a dead letter queue 036 */ 037 boolean isSendToDeadLetterQueue(Message message); 038 039 /** 040 * Returns the dead letter queue for the given message and subscription. 041 */ 042 ActiveMQDestination getDeadLetterQueueFor(Message message, Subscription subscription); 043 044 /** 045 * @return true if processes expired messages 046 */ 047 public boolean isProcessExpired() ; 048 049 /** 050 * @param processExpired the processExpired to set 051 */ 052 public void setProcessExpired(boolean processExpired); 053 054 /** 055 * @return the processNonPersistent 056 */ 057 public boolean isProcessNonPersistent(); 058 059 /** 060 * @param processNonPersistent the processNonPersistent to set 061 */ 062 public void setProcessNonPersistent(boolean processNonPersistent); 063 064}