content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.activemq.broker.region.policy;
  
  import org.apache.activemq.broker.region.Subscription;
  import org.apache.activemq.command.ActiveMQDestination;
  import org.apache.activemq.command.Message;
  
  /**
   * A strategy for choosing which destination is used for dead letter queue messages.
   *
   *
   */
  public interface DeadLetterStrategy {
  
      /**
       * Allow pluggable strategy for deciding if message should be sent to a dead letter queue
       * for example, you might not want to ignore expired or non-persistent messages
       * @param message
       * @return true if message should be sent to a dead letter queue
       */
      boolean isSendToDeadLetterQueue(Message message);
  
      /**
       * Returns the dead letter queue for the given message and subscription.
       */
      ActiveMQDestination getDeadLetterQueueFor(Message message, Subscription subscription);
  
      /**
       * @return true if processes expired messages
       */
      public boolean isProcessExpired() ;
  
      /**
       * @param processExpired the processExpired to set
       */
      public void setProcessExpired(boolean processExpired);
  
      /**
       * @return the processNonPersistent
       */
      public boolean isProcessNonPersistent();
  
      /**
       * @param processNonPersistent the processNonPersistent to set
       */
      public void setProcessNonPersistent(boolean processNonPersistent);
  
      /**
       * Allows for a Message that was already processed by a DLQ to be rolled back in case
       * of a move or a retry of that message, otherwise the Message would be considered a
       * duplicate if this strategy is doing Message Auditing.
       *
       * @param message
       */
      public void rollback(Message message);
  
      /**
       * The expiration value to use on messages sent to the DLQ, default 0
       * @return expiration in milli seconds
       */
      public void setExpiration(long expiration);
  
      public long getExpiration();
  
  }
  