01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * 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;
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 log = Log
42: .open(AbstractSelectManager.class);
43:
44: /**
45: * Sets the timeout.
46: */
47: public void setSelectTimeout(long period) {
48: }
49:
50: /**
51: * Sets the max.
52: */
53: public void setSelectMax(int max) {
54: }
55:
56: /**
57: * Starts the manager.
58: */
59: abstract public boolean start();
60:
61: /**
62: * Adds a keepalive connection.
63: *
64: * @param conn the connection to register as keepalive
65: *
66: * @return true if the keepalive was successful
67: */
68: abstract public boolean keepalive(TcpConnection conn);
69:
70: /**
71: * Returns the select count.
72: */
73: public int getSelectCount() {
74: return 0;
75: }
76:
77: /**
78: * Returns the number of available keepalives.
79: */
80: public int getFreeKeepalive() {
81: return Integer.MAX_VALUE / 2;
82: }
83:
84: /**
85: * Stops the manager.
86: */
87: public boolean stop() {
88: return true;
89: }
90:
91: /**
92: * Closing the manager.
93: */
94: public void close() {
95: stop();
96: }
97: }
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