KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > directwebremoting > extend > ServerLoadMonitor


1 /*
2  * Copyright 2005 Joe Walker
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  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.directwebremoting.extend;
17
18 /**
19  * Polling or Comet style interactive web applications require something to
20  * monitor high levels of server load to ensure that
21  * @author Joe Walker [joe at getahead dot ltd dot uk]
22  */
23 public interface ServerLoadMonitor
24 {
25     /**
26      * Controller for poll times.
27      * <p>TODO: We should probably get rid of this and leave it to PollHandler?
28      * @return How long should this client wait until it next polls?
29      */
30     int getDisconnectedTime();
31
32     /**
33      * What's the longest time that we should wait before asking the client to
34      * reconnect?
35      * @return The maximum client connected time
36      */
37     long getConnectedTime();
38
39     /**
40      * A thread is about to begin a wait period.
41      * This can be used by implementations to dynamically adjust the poll
42      * timings.
43      * @param controller An object that we can use to control the wait
44      */
45     void threadWaitStarting(WaitController controller);
46
47     /**
48      * A thread has just ended a wait period.
49      * This can be used by implementations to dynamically adjust the poll
50      * timings.
51      * @param controller An object that we can use to control the wait
52      */
53     void threadWaitEnding(WaitController controller);
54
55     /**
56      * Kill all available long-poll requests
57      */
58     void shutdown();
59 }
60
Popular Tags