1 // ========================================================================
2 // Copyright 2006 Mort Bay Consulting Pty. Ltd.
3 // ------------------------------------------------------------------------
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
7 // http://www.apache.org/licenses/LICENSE-2.0
8 // Unless required by applicable law or agreed to in writing, software
9 // distributed under the License is distributed on an "AS IS" BASIS,
10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 // See the License for the specific language governing permissions and
12 // limitations under the License.
13 //========================================================================
14
15 package org.mortbay.cometd.continuation;
16
17 import java.util.Timer;
18 import java.util.TimerTask;
19
20 import javax.servlet.ServletContext;
21
22 import org.mortbay.cometd.AbstractBayeux;
23 import org.mortbay.cometd.ClientImpl;
24 import org.mortbay.thread.Timeout;
25 import org.mortbay.thread.Timeout.Task;
26
27 /* ------------------------------------------------------------ */
28 /**
29 * Extension of Bayeux that uses {@link ContinuationClient}s.
30 * @author gregw
31 *
32 */
33 public class ContinuationBayeux extends AbstractBayeux
34 {
35 private static int __id;
36 private transient Timer _tick;
37 private transient Timeout _timeout;
38 private long _now;
39
40
41 /* ------------------------------------------------------------ */
42 /* (non-Javadoc)
43 * @see org.mortbay.cometd.AbstractBayeux#newClient(java.lang.String, dojox.io.cometd.Destination)
44 */
45 @Override
46 public ClientImpl newRemoteClient()
47 {
48 return new ContinuationClient(this);
49 }
50
51 /* ------------------------------------------------------------ */
52 /* (non-Javadoc)
53 * @see org.mortbay.cometd.AbstractBayeux#initialize(javax.servlet.ServletContext)
54 */
55 @Override
56 protected void initialize(ServletContext context)
57 {
58 super.initialize(context);
59
60 _tick=new Timer("ContinuationBayeux-"+__id++, true);
61 _timeout=new Timeout();
62 _timeout.setDuration(getMaxInterval());
63
64 _tick.schedule(new TimerTask()
65 {
66 @Override
67 public void run()
68 {
69 _now=System.currentTimeMillis();
70 _timeout.tick(_now);
71 }
72 },500L,500L);
73 }
74
75 /* ------------------------------------------------------------ */
76 long getNow()
77 {
78 return _now;
79 }
80
81 /* ------------------------------------------------------------ */
82 @Override
83 public void setMaxInterval(long ms)
84 {
85 _timeout.setDuration(ms);
86 super.setMaxInterval(ms);
87 }
88
89 /* ------------------------------------------------------------ */
90 /* (non-Javadoc)
91 * @see org.mortbay.cometd.AbstractBayeux#initialize(javax.servlet.ServletContext)
92 */
93 public void destroy()
94 {
95 _tick.cancel();
96 }
97
98 /* ------------------------------------------------------------ */
99 void startTimeout(Task timeout,long delay)
100 {
101 synchronized(_timeout)
102 {
103 if (delay==0)
104 _timeout.schedule(timeout);
105 else
106 _timeout.schedule(timeout,delay);
107 }
108 }
109
110 /* ------------------------------------------------------------ */
111 public void cancelTimeout(Task timeout)
112 {
113 synchronized(_timeout)
114 {
115 if (timeout!=null)
116 timeout.cancel();
117 }
118 }
119
120 }