1 /***
2 *
3 * Copyright 2004 Protique Ltd
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 **/
18 package org.codehaus.activemq.transport.composite;
19
20 import org.codehaus.activemq.message.WireFormat;
21 import org.codehaus.activemq.transport.TransportChannel;
22 import org.codehaus.activemq.transport.TransportChannelFactory;
23 import org.codehaus.activemq.util.JMSExceptionHelper;
24
25 import javax.jms.JMSException;
26 import java.net.URI;
27 import java.net.URISyntaxException;
28 import java.util.ArrayList;
29 import java.util.List;
30 import java.util.StringTokenizer;
31
32 /***
33 * A Composite implementation of a TransportChannelFactory
34 *
35 * @version $Revision: 1.5 $
36 */
37 public class CompositeTransportChannelFactory implements TransportChannelFactory {
38 private String separator = ",";
39
40 public TransportChannel create(WireFormat wireFormat, URI remoteLocation) throws JMSException {
41 try {
42 return new CompositeTransportChannel(wireFormat, parseURIs(remoteLocation));
43 }
44 catch (URISyntaxException e) {
45 throw JMSExceptionHelper.newJMSException("Can't parse list of URIs for: " + remoteLocation + ". Reason: " + e, e);
46 }
47 }
48
49 public TransportChannel create(WireFormat wireFormat, URI remoteLocation, URI localLocation) throws JMSException {
50 return create(wireFormat, remoteLocation);
51 }
52
53 public boolean requiresEmbeddedBroker() {
54 return false;
55 }
56
57 protected List parseURIs(URI uri) throws URISyntaxException {
58 String text = uri.getSchemeSpecificPart();
59 List uris = new ArrayList();
60 StringTokenizer iter = new StringTokenizer(text, separator);
61 while (iter.hasMoreTokens()) {
62 String child = stripLeadingSlashes(iter.nextToken().trim());
63 uris.add(new URI(child));
64 }
65 return randomizeURIs(uris);
66 }
67
68 protected String stripLeadingSlashes(String text) {
69 int idx = 0;
70 while (text.charAt(idx) == '/') {
71 idx++;
72 }
73 if (idx > 0) {
74 return text.substring(idx);
75 }
76 return text;
77 }
78
79
80 protected List randomizeURIs(List uris) {
81 return uris;
82 }
83 }