01: /*
02: * %W% %E%
03: *
04: * Copyright 1990-2006 Sun Microsystems, Inc. All Rights Reserved.
05: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License version
09: * 2 only, as published by the Free Software Foundation.
10: *
11: * This program is distributed in the hope that it will be useful, but
12: * WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * General Public License version 2 for more details (a copy is
15: * included at /legal/license.txt).
16: *
17: * You should have received a copy of the GNU General Public License
18: * version 2 along with this work; if not, write to the Free Software
19: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20: * 02110-1301 USA
21: *
22: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
23: * Clara, CA 95054 or visit www.sun.com if you need additional
24: * information or have any questions.
25: */
26:
27: package com.sun.jump.module.lifecycle;
28:
29: import com.sun.jump.module.JUMPModuleFactory;
30:
31: /**
32: * <code>JUMPApplicationLifecycleModuleFactory</code> is a factory for
33: * <code>JUMPApplicationLifecycleModule</code>
34: */
35: public abstract class JUMPApplicationLifecycleModuleFactory extends
36: JUMPModuleFactory {
37: private static JUMPApplicationLifecycleModuleFactory INSTANCE = null;
38:
39: public static JUMPApplicationLifecycleModuleFactory getInstance() {
40: return INSTANCE;
41: }
42:
43: /**
44: * Creates a new instance of JUMPApplicationLifecycleModuleFactory
45: */
46: protected JUMPApplicationLifecycleModuleFactory() {
47: synchronized (JUMPApplicationLifecycleModuleFactory.class) {
48: if (INSTANCE == null) {
49: INSTANCE = this ;
50: }
51: }
52: }
53:
54: /**
55: * Returns a <code>JUMPApplicationLifecycleModule</code> for the
56: * lifecycle policy specified. This policy is one of the stated policies
57: * below.
58: *
59: * @param lifecyclePolicy the lifecycle policy for which an appropriate
60: * lifecycle module should be returned.
61: */
62: public abstract JUMPApplicationLifecycleModule getModule(
63: String lifecyclePolicy);
64:
65: /**
66: * This policy descriptor allows only one live instance of an app
67: * at any given time
68: */
69: public static final String POLICY_ONE_LIVE_INSTANCE_ONLY = "lifecycle/one-live-instance-only";
70: }
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