001 /** 002 * 003 * Copyright 2004 Protique Ltd 004 * 005 * Licensed under the Apache License, Version 2.0 (the "License"); 006 * you may not use this file except in compliance with the License. 007 * 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 **/ 018 package org.activemq.transport; 019 020 import org.activemq.io.WireFormat; 021 import org.activemq.util.FactoryFinder; 022 023 import javax.jms.JMSException; 024 import java.io.IOException; 025 import java.net.URI; 026 import java.net.URISyntaxException; 027 028 /** 029 * locates a protocol specific TransportServerChannelFactory 030 * 031 * @version $Revision: 1.1.1.1 $ 032 */ 033 public class TransportServerChannelProvider { 034 035 private static FactoryFinder finder = new FactoryFinder("META-INF/services/org/activemq/transport/server/"); 036 037 /** 038 * Create a Channel used for the Broker to listen to remove connections 039 * 040 * @param bindAddress 041 * @return the TransportServerChannel bound to the address 042 * @throws JMSException 043 */ 044 public static TransportServerChannel create(WireFormat wireFormat, URI bindAddress) throws JMSException { 045 return getFactory(bindAddress.getScheme()).create(wireFormat, bindAddress); 046 } 047 048 /** 049 * Create a Channel used for the Broker to listen to remove connections 050 * 051 * @param bindAddress 052 * @return the TransportServerChannel bound to the address 053 * @throws JMSException 054 */ 055 public static TransportServerChannel newInstance(WireFormat wireFormat, String bindAddress) throws JMSException, URISyntaxException { 056 return create(wireFormat, new URI(bindAddress)); 057 } 058 059 protected static TransportServerChannelFactory getFactory(String protocol) throws JMSException { 060 try { 061 Object value = finder.newInstance(protocol); 062 if (value instanceof TransportServerChannelFactory) { 063 return (TransportServerChannelFactory) value; 064 } 065 else { 066 throw new JMSException("Factory does not implement TransportServerChannelFactory: " + value); 067 } 068 } 069 catch (IllegalAccessException e) { 070 throw createJMSexception(protocol, e); 071 } 072 catch (InstantiationException e) { 073 throw createJMSexception(protocol, e); 074 } 075 catch (IOException e) { 076 throw createJMSexception(protocol, e); 077 } 078 catch (ClassNotFoundException e) { 079 throw createJMSexception(protocol, e); 080 } 081 082 } 083 084 protected static JMSException createJMSexception(String protocol, Exception e) { 085 JMSException answer = new JMSException("Could not load protocol: " + protocol + ". Reason: " + e); 086 answer.setLinkedException(e); 087 return answer; 088 } 089 }