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.transport.reliable;
018    
019    import java.io.IOException;
020    
021    /**
022     * This class keeps around a buffer of old commands which have been sent on
023     * an unreliable transport. The buffers are of type Object as they could be datagrams
024     * or byte[] or ByteBuffer - depending on the underlying transport implementation.
025     * 
026     * 
027     */
028    public interface ReplayBuffer {
029    
030        /**
031         * Submit a buffer for caching around for a period of time, during which time it can be replayed
032         * to users interested in it.
033         */
034        void addBuffer(int commandId, Object buffer);
035        
036        void setReplayBufferListener(ReplayBufferListener bufferPoolAdapter);
037        
038        void replayMessages(int fromCommandId, int toCommandId, Replayer replayer) throws IOException;
039    }