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Java > Open Source Codes > com > caucho > server > port > AbstractSelectManager


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.server.port;
30
31 import com.caucho.log.Log;
32 import com.caucho.util.L10N;
33
34 import java.util.logging.Logger JavaDoc;
35
36 /**
37  * A select manager handles keepalive connections.
38  */
39 abstract public class AbstractSelectManager {
40   private static final L10N L = new L10N(AbstractSelectManager.class);
41   private static final Logger JavaDoc log = Log.open(AbstractSelectManager.class);
42
43   /**
44    * Sets the timeout.
45    */
46   public void setSelectTimeout(long period)
47   {
48   }
49
50   /**
51    * Sets the max.
52    */
53   public void setSelectMax(int max)
54   {
55   }
56   
57   /**
58    * Starts the manager.
59    */
60   abstract public void start();
61   
62   /**
63    * Adds a keepalive connection.
64    *
65    * @param conn the connection to register as keepalive
66    *
67    * @return true if the keepalive was successful
68    */
69   abstract public boolean keepalive(TcpConnection conn);
70
71   /**
72    * Returns the select count.
73    */
74   public int getSelectCount()
75   {
76     return 0;
77   }
78
79   /**
80    * Returns the number of available keepalives.
81    */
82   public int getFreeKeepalive()
83   {
84     return Integer.MAX_VALUE / 2;
85   }
86
87   /**
88    * Stops the manager.
89    */
90   public boolean stop()
91   {
92     return true;
93   }
94
95   /**
96    * Closing the manager.
97    */
98   public void close()
99   {
100     stop();
101   }
102 }
103
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