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.http;
19
20 import EDU.oswego.cs.dl.util.concurrent.SynchronizedBoolean;
21 import org.apache.commons.logging.Log;
22 import org.apache.commons.logging.LogFactory;
23 import org.codehaus.activemq.message.TextWireFormat;
24 import org.codehaus.activemq.transport.TransportChannelSupport;
25
26 import javax.jms.JMSException;
27
28 /***
29 * @version $Revision: 1.3 $
30 */
31 public abstract class HttpTransportChannelSupport extends TransportChannelSupport implements Runnable {
32 private static final Log log = LogFactory.getLog(HttpTransportChannelSupport.class);
33
34 private TextWireFormat wireFormat;
35 private String remoteUrl;
36 private Thread thread;
37 private SynchronizedBoolean closed = new SynchronizedBoolean(false);
38 private SynchronizedBoolean started = new SynchronizedBoolean(false);
39
40 public HttpTransportChannelSupport(TextWireFormat wireFormat, String remoteUrl) {
41 this.wireFormat = wireFormat;
42 this.remoteUrl = remoteUrl;
43 }
44
45 public boolean isMulticast() {
46 return false;
47 }
48
49 public void start() throws JMSException {
50 if (started.commit(false, true)) {
51 if (getClientID() != null) {
52 startThread();
53 }
54 }
55 }
56
57 protected void startThread() {
58 thread = new Thread(this, toString());
59 thread.start();
60 }
61
62 public void stop() {
63 if (closed.commit(false, true)) {
64 super.stop();
65 }
66 }
67
68 public synchronized void setClientID(String clientID) {
69 super.setClientID(clientID);
70 if (clientID != null && thread == null && started.get()) {
71 startThread();
72 }
73 }
74
75 public String toString() {
76 return "HTTP Reader " + getRemoteUrl();
77 }
78
79 /***
80 * Can this wireformat process packets of this version
81 * @param version the version number to test
82 * @return true if can accept the version
83 */
84 public boolean canProcessWireFormatVersion(int version){
85 return wireFormat.canProcessWireFormatVersion(version);
86 }
87
88 /***
89 * @return the current version of this wire format
90 */
91 public int getCurrentWireFormatVersion(){
92 return wireFormat.getCurrentWireFormatVersion();
93 }
94
95
96
97 public String getRemoteUrl() {
98 return remoteUrl;
99 }
100
101 public TextWireFormat getWireFormat() {
102 return wireFormat;
103 }
104
105 public void setWireFormat(TextWireFormat wireFormat) {
106 this.wireFormat = wireFormat;
107 }
108
109 public SynchronizedBoolean getClosed() {
110 return closed;
111 }
112
113 public SynchronizedBoolean getStarted() {
114 return started;
115 }
116 }