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.udp; 018 019import java.io.IOException; 020import java.net.SocketAddress; 021 022import org.apache.activemq.command.Command; 023import org.apache.activemq.openwire.OpenWireFormat; 024import org.apache.activemq.transport.reliable.ReplayBuffer; 025import org.apache.activemq.util.IntSequenceGenerator; 026 027/** 028 * 029 * 030 */ 031public abstract class CommandChannelSupport implements CommandChannel { 032 033 protected OpenWireFormat wireFormat; 034 protected int datagramSize = 4 * 1024; 035 protected SocketAddress targetAddress; 036 protected SocketAddress replayAddress; 037 protected final String name; 038 protected final IntSequenceGenerator sequenceGenerator; 039 protected DatagramHeaderMarshaller headerMarshaller; 040 private ReplayBuffer replayBuffer; 041 042 public CommandChannelSupport(UdpTransport transport, OpenWireFormat wireFormat, int datagramSize, SocketAddress targetAddress, 043 DatagramHeaderMarshaller headerMarshaller) { 044 this.wireFormat = wireFormat; 045 this.datagramSize = datagramSize; 046 this.targetAddress = targetAddress; 047 this.headerMarshaller = headerMarshaller; 048 this.name = transport.toString(); 049 this.sequenceGenerator = transport.getSequenceGenerator(); 050 this.replayAddress = targetAddress; 051 if (sequenceGenerator == null) { 052 throw new IllegalArgumentException("No sequenceGenerator on the given transport: " + transport); 053 } 054 } 055 056 public void write(Command command) throws IOException { 057 write(command, targetAddress); 058 } 059 060 061 // Properties 062 // ------------------------------------------------------------------------- 063 064 public int getDatagramSize() { 065 return datagramSize; 066 } 067 068 /** 069 * Sets the default size of a datagram on the network. 070 */ 071 public void setDatagramSize(int datagramSize) { 072 this.datagramSize = datagramSize; 073 } 074 075 public SocketAddress getTargetAddress() { 076 return targetAddress; 077 } 078 079 public void setTargetAddress(SocketAddress targetAddress) { 080 this.targetAddress = targetAddress; 081 } 082 083 public SocketAddress getReplayAddress() { 084 return replayAddress; 085 } 086 087 public void setReplayAddress(SocketAddress replayAddress) { 088 this.replayAddress = replayAddress; 089 } 090 091 public String toString() { 092 return "CommandChannel#" + name; 093 } 094 095 public DatagramHeaderMarshaller getHeaderMarshaller() { 096 return headerMarshaller; 097 } 098 099 public void setHeaderMarshaller(DatagramHeaderMarshaller headerMarshaller) { 100 this.headerMarshaller = headerMarshaller; 101 } 102 103 public ReplayBuffer getReplayBuffer() { 104 return replayBuffer; 105 } 106 107 public void setReplayBuffer(ReplayBuffer replayBuffer) { 108 this.replayBuffer = replayBuffer; 109 } 110 111}