01: /*
02: *
03: *
04: * Copyright 1990-2007 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.midp.suspend;
28:
29: /**
30: * A subsystem that implies special actions on system
31: * suspend/resume.
32: */
33: public interface Subsystem {
34: /**
35: * Being suspended state.
36: */
37: int SUSPENDING = 0;
38: /**
39: * Suspended state.
40: */
41: int SUSPENDED = 1;
42: /**
43: * Being resumed state.
44: */
45: int RESUMING = 2;
46: /**
47: * Active state.
48: */
49: int ACTIVE = 3;
50:
51: /**
52: * Perfoms actions required during system resume and moves
53: * the subsystem to <code>ACTIVE</code> state.
54: * @throws StateTransitionException if the subsystem cannot be
55: * moved to <code>ACTIVE</code> state.
56: */
57: void resume() throws StateTransitionException;
58:
59: /**
60: * Perfoms actions required during system suspend and moves
61: * the subsystem to <code>SUSPENDED</code> state.
62: * @throws StateTransitionException if the subsystem cannot be
63: * moved to <code>SUSPENDED</code> state.
64: */
65: void suspend() throws StateTransitionException;
66: }
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