01: /*
02: * Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * by Sun in the LICENSE file that accompanied this code.
10: *
11: * This code is distributed in the hope that it will be useful, but WITHOUT
12: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14: * version 2 for more details (a copy is included in the LICENSE file that
15: * accompanied this code).
16: *
17: * You should have received a copy of the GNU General Public License version
18: * 2 along with this work; if not, write to the Free Software Foundation,
19: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20: *
21: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22: * CA 95054 USA or visit www.sun.com if you need additional information or
23: * have any questions.
24: */
25:
26: package sun.management;
27:
28: import java.lang.management.MemoryManagerMXBean;
29: import java.lang.management.MemoryPoolMXBean;
30:
31: /**
32: * Implementation class for a memory manager.
33: * Standard and committed hotspot-specific metrics if any.
34: *
35: * ManagementFactory.getMemoryManagerMXBeans() returns a list
36: * of instances of this class.
37: */
38: class MemoryManagerImpl implements MemoryManagerMXBean {
39:
40: private final String name;
41: private final boolean isValid;
42: private MemoryPoolMXBean[] pools;
43:
44: MemoryManagerImpl(String name) {
45: this .name = name;
46: this .isValid = true;
47: this .pools = null;
48: }
49:
50: public String getName() {
51: return name;
52: }
53:
54: public boolean isValid() {
55: return isValid;
56: }
57:
58: public String[] getMemoryPoolNames() {
59: MemoryPoolMXBean[] ps = getMemoryPools();
60:
61: String[] names = new String[ps.length];
62: for (int i = 0; i < ps.length; i++) {
63: names[i] = ps[i].getName();
64: }
65: return names;
66: }
67:
68: synchronized MemoryPoolMXBean[] getMemoryPools() {
69: if (pools == null) {
70: pools = getMemoryPools0();
71: }
72: return pools;
73: }
74:
75: private native MemoryPoolMXBean[] getMemoryPools0();
76:
77: }
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