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.store; 018 019import org.apache.activemq.command.Message; 020import org.apache.activemq.command.MessageId; 021 022/** 023 * 024 */ 025public interface MessageRecoveryListener { 026 boolean recoverMessage(Message message) throws Exception; 027 boolean recoverMessageReference(MessageId ref) throws Exception; 028 boolean hasSpace(); 029 boolean canRecoveryNextMessage(); 030 /** 031 * check if ref is a duplicate but do not record the reference 032 * @param ref 033 * @return true if ref is a duplicate 034 */ 035 boolean isDuplicate(MessageId ref); 036}