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 *
31 * @author gregw
32 *
33 */
34 public class ContinuationBayeux extends AbstractBayeux
35 {
36 private static int __id;
37 private transient Timer _tick;
38 private transient Timeout _timeout;
39 private long _now;
40
41 /* ------------------------------------------------------------ */
42 /*
43 * (non-Javadoc)
44 *
45 * @see org.mortbay.cometd.AbstractBayeux#newClient(java.lang.String,
46 * dojox.io.cometd.Destination)
47 */
48 @Override
49 public ClientImpl newRemoteClient()
50 {
51 ClientImpl client=new ContinuationClient(this);
52 addClient(client,null);
53 return client;
54 }
55
56 /* ------------------------------------------------------------ */
57 /*
58 * (non-Javadoc)
59 *
60 * @see
61 * org.mortbay.cometd.AbstractBayeux#initialize(javax.servlet.ServletContext
62 * )
63 */
64 @Override
65 protected void initialize(ServletContext context)
66 {
67 super.initialize(context);
68
69 _tick=new Timer("ContinuationBayeux-" + __id++,true);
70 _timeout=new Timeout();
71
72 _tick.schedule(new TimerTask()
73 {
74 @Override
75 public void run()
76 {
77 _now=System.currentTimeMillis();
78 _timeout.tick(_now);
79 }
80 },100L,100L);
81 }
82
83 /* ------------------------------------------------------------ */
84 long getNow()
85 {
86 return _now;
87 }
88
89 /* ------------------------------------------------------------ */
90 /*
91 * (non-Javadoc)
92 *
93 * @see
94 * org.mortbay.cometd.AbstractBayeux#initialize(javax.servlet.ServletContext
95 * )
96 */
97 public void destroy()
98 {
99 _tick.cancel();
100 }
101
102 /* ------------------------------------------------------------ */
103 void startTimeout(Timeout.Task timeout, long interval)
104 {
105 synchronized(_timeout)
106 {
107 _timeout.schedule(timeout,interval);
108 }
109 }
110
111 /* ------------------------------------------------------------ */
112 void cancelTimeout(Timeout.Task timeout)
113 {
114 synchronized(_timeout)
115 {
116 if (timeout != null)
117 timeout.cancel();
118 }
119 }
120
121 }