01: /*
02: * @(#)VMNotification.java 1.14 06/10/10
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:
28: package sun.misc;
29:
30: /**
31: * The <code>sun.misc.VMNotification</code> interface is implemented by classes
32: * wishing to receive events when the available memory changes state.
33: * <h3>Compatibilty</h3>
34: * Some PersonalJava implementations support the <code>sun.misc.VM</code> class.
35: * In Personal Profile, the sun.misc package is optional.
36: */
37:
38: public interface VMNotification {
39: /**
40: * The sun.misc.VMNotification interface is implemented by
41: * classes wishing to receive events when the available memory
42: * changes state.
43: * This method is invoked when the available memory in the system
44: * changes state. The listener should take appropriate action to
45: * free memory when the available memory is in the YELLOW or RED states.
46: *
47: * @param oldState The old memory state, one of VM.STATE_GREEN,
48: * VM.STATE_YELLOW or VM.STATE_RED
49: * @param newState The new memory state
50: *
51: * @see sun.misc.VM#registerVMNotification
52: */
53: void newAllocState(int oldState, int newState, boolean notUsed);
54: }
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