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
19 package org.codehaus.activemq.transport.reliable;
20 import java.net.URI;
21 import java.net.URISyntaxException;
22 import javax.jms.JMSException;
23 import org.codehaus.activemq.message.WireFormat;
24 import org.codehaus.activemq.transport.TransportChannel;
25 import org.codehaus.activemq.transport.composite.CompositeTransportChannelFactory;
26 import org.codehaus.activemq.util.JMSExceptionHelper;
27
28 /***
29 * A Reliable implementation of a TransportChannelFactory
30 *
31 * @version $Revision: 1.1 $
32 */
33 public class ReliableTransportChannelFactory extends CompositeTransportChannelFactory {
34 ;
35
36 /***
37 * Create a TransportChannel
38 *
39 * @param wireFormat - the on-the-wire marshaller
40 * @param remoteLocation - location to bind to
41 * @return a reliable transport channel
42 * @throws JMSException if an error occurs
43 */
44 public TransportChannel create(WireFormat wireFormat, URI remoteLocation) throws JMSException {
45 try {
46 return new ReliableTransportChannel(wireFormat, parseURIs(remoteLocation));
47 }
48 catch (URISyntaxException e) {
49 throw JMSExceptionHelper.newJMSException("Can't parse list of URIs for: " + remoteLocation + ". Reason: "
50 + e, e);
51 }
52 }
53
54 /***
55 * @param uris - the URIs to randomize
56 * @return randomized array
57 */
58 protected URI[] randomizeURIs(URI[] uris) {
59 URI[] result = uris;
60 if (uris != null && uris.length > 1) {
61 result = new URI[uris.length];
62 SMLCGRandom random = new SMLCGRandom();
63 int startIndex = (int) (random.nextDouble() * (uris.length + 1));
64 int count = 0;
65 for (int i = startIndex;i < uris.length;i++) {
66 result[count++] = uris[i];
67 }
68 for (int i = 0;i < startIndex;i++) {
69 result[count++] = uris[i];
70 }
71 }
72 return result;
73 }
74 }