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.composite;
019
020 import java.net.URI;
021 import java.net.URISyntaxException;
022 import java.util.ArrayList;
023 import java.util.List;
024 import java.util.StringTokenizer;
025
026 import javax.jms.JMSException;
027
028 import org.activemq.io.WireFormat;
029 import org.activemq.transport.TransportChannel;
030 import org.activemq.transport.TransportChannelFactorySupport;
031 import org.activemq.util.JMSExceptionHelper;
032
033 /**
034 * A Composite implementation of a TransportChannelFactory
035 *
036 * @version $Revision: 1.1.1.1 $
037 */
038 public class CompositeTransportChannelFactory extends TransportChannelFactorySupport {
039 private static String separator = ",";
040
041 public TransportChannel create(WireFormat wireFormat, URI remoteLocation) throws JMSException {
042 try {
043 List uris = new ArrayList();
044 String text = parseURIs(uris, remoteLocation);
045 uris = randomizeURIs(uris);
046 TransportChannel channel = new CompositeTransportChannel(wireFormat, uris);
047
048 return populateProperties(channel, text);
049 }
050 catch (URISyntaxException e) {
051 throw JMSExceptionHelper.newJMSException("Can't parse list of URIs for: " + remoteLocation + ". Reason: " + e, e);
052 }
053 }
054
055 public TransportChannel create(WireFormat wireFormat, URI remoteLocation, URI localLocation) throws JMSException {
056 return create(wireFormat, remoteLocation);
057 }
058
059 public boolean requiresEmbeddedBroker() {
060 return false;
061 }
062
063 public static String parseURIs(List uris, URI uri) throws URISyntaxException {
064 String answer = "";
065 String text = uri.getSchemeSpecificPart();
066 if (text.startsWith("(")) {
067 // lets find the end of the string
068 int count = 1;
069 int size = text.length();
070 for (int i = 1; i < size; i++) {
071 char ch = text.charAt(i);
072 if (ch == '(') {
073 count++;
074 }
075 else if (ch == ')') {
076 if (--count == 0) {
077 // we're at the end
078 answer = text.substring(i + 1);
079 text = text.substring(1, i);
080 break;
081 }
082 }
083 }
084 }
085 StringTokenizer iter = new StringTokenizer(text, separator);
086 while (iter.hasMoreTokens()) {
087 String child = stripLeadingSlashes(iter.nextToken().trim());
088 uris.add(new URI(child));
089 }
090 return answer;
091 }
092
093 protected static String stripLeadingSlashes(String text) {
094 int idx = 0;
095 while (idx < text.length() && text.charAt(idx) == '/') {
096 idx++;
097 }
098 if (idx > 0) {
099 return text.substring(idx);
100 }
101 return text;
102 }
103
104
105 protected List randomizeURIs(List uris) {
106 return uris;
107 }
108 }