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.transport.reliable; 018 019 020import java.io.IOException; 021 022/** 023 * A pluggable strategy for how to deal with dropped packets. 024 * 025 * 026 */ 027public interface ReplayStrategy { 028 029 /** 030 * Deals with a dropped packet. 031 * 032 * @param transport the transport on which the packet was dropped 033 * @param expectedCounter the expected command counter 034 * @param actualCounter the actual command counter 035 * @param nextAvailableCounter TODO 036 * @return true if the command should be buffered or false if it should be discarded 037 */ 038 boolean onDroppedPackets(ReliableTransport transport, int expectedCounter, int actualCounter, int nextAvailableCounter) throws IOException; 039 040 void onReceivedPacket(ReliableTransport transport, long expectedCounter); 041 042} 043