/**
 * 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.store;

import org.apache.activemq.command.Message;
import org.apache.activemq.command.MessageId;

/**
 * 
 */
public interface MessageRecoveryListener {
    boolean recoverMessage(Message message) throws Exception;
    boolean recoverMessageReference(MessageId ref) throws Exception;
    boolean hasSpace();
    /**
     * check if ref is a duplicate but do not record the reference
     * @param ref
     * @return true if ref is a duplicate
     */
    boolean isDuplicate(MessageId ref);
}
