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.vm; 018 019 import java.io.IOException; 020 import java.net.InetSocketAddress; 021 import java.net.URI; 022 import java.util.concurrent.atomic.AtomicInteger; 023 024 import org.apache.activemq.command.BrokerInfo; 025 import org.apache.activemq.transport.MutexTransport; 026 import org.apache.activemq.transport.ResponseCorrelator; 027 import org.apache.activemq.transport.Transport; 028 import org.apache.activemq.transport.TransportAcceptListener; 029 import org.apache.activemq.transport.TransportServer; 030 031 /** 032 * Broker side of the VMTransport 033 */ 034 public class VMTransportServer implements TransportServer { 035 036 private TransportAcceptListener acceptListener; 037 private final URI location; 038 private boolean disposed; 039 040 private final AtomicInteger connectionCount = new AtomicInteger(0); 041 private final boolean disposeOnDisconnect; 042 043 /** 044 * @param location 045 * @param disposeOnDisconnect 046 */ 047 public VMTransportServer(URI location, boolean disposeOnDisconnect) { 048 this.location = location; 049 this.disposeOnDisconnect = disposeOnDisconnect; 050 } 051 052 /** 053 * @return a pretty print of this 054 */ 055 public String toString() { 056 return "VMTransportServer(" + location + ")"; 057 } 058 059 /** 060 * @return new VMTransport 061 * @throws IOException 062 */ 063 public VMTransport connect() throws IOException { 064 TransportAcceptListener al; 065 synchronized (this) { 066 if (disposed) { 067 throw new IOException("Server has been disposed."); 068 } 069 al = acceptListener; 070 } 071 if (al == null) { 072 throw new IOException("Server TransportAcceptListener is null."); 073 } 074 075 connectionCount.incrementAndGet(); 076 VMTransport client = new VMTransport(location) { 077 public void stop() throws Exception { 078 if (stopping.compareAndSet(false, true) && !disposed) { 079 super.stop(); 080 if (connectionCount.decrementAndGet() == 0 081 && disposeOnDisconnect) { 082 VMTransportServer.this.stop(); 083 } 084 } 085 }; 086 }; 087 088 VMTransport server = new VMTransport(location); 089 client.setPeer(server); 090 server.setPeer(client); 091 al.onAccept(configure(server)); 092 return client; 093 } 094 095 /** 096 * Configure transport 097 * 098 * @param transport 099 * @return the Transport 100 */ 101 public static Transport configure(Transport transport) { 102 transport = new MutexTransport(transport); 103 transport = new ResponseCorrelator(transport); 104 return transport; 105 } 106 107 /** 108 * Set the Transport accept listener for new Connections 109 * 110 * @param acceptListener 111 */ 112 public synchronized void setAcceptListener(TransportAcceptListener acceptListener) { 113 this.acceptListener = acceptListener; 114 } 115 116 public void start() throws IOException { 117 } 118 119 public void stop() throws IOException { 120 VMTransportFactory.stopped(this); 121 } 122 123 public URI getConnectURI() { 124 return location; 125 } 126 127 public URI getBindURI() { 128 return location; 129 } 130 131 public void setBrokerInfo(BrokerInfo brokerInfo) { 132 } 133 134 public InetSocketAddress getSocketAddress() { 135 return null; 136 } 137 138 public int getConnectionCount() { 139 return connectionCount.intValue(); 140 } 141 }