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.OperatingSystemMXBean;
29: import sun.misc.Unsafe;
30:
31: /**
32: * Implementation class for the operating system.
33: * Standard and committed hotspot-specific metrics if any.
34: *
35: * ManagementFactory.getOperatingSystemMXBean() returns an instance
36: * of this class.
37: */
38: public class OperatingSystemImpl implements OperatingSystemMXBean {
39:
40: private final VMManagement jvm;
41:
42: /**
43: * Constructor of OperatingSystemImpl class.
44: */
45: protected OperatingSystemImpl(VMManagement vm) {
46: this .jvm = vm;
47: }
48:
49: public String getName() {
50: return jvm.getOsName();
51: }
52:
53: public String getArch() {
54: return jvm.getOsArch();
55: }
56:
57: public String getVersion() {
58: return jvm.getOsVersion();
59: }
60:
61: public int getAvailableProcessors() {
62: return jvm.getAvailableProcessors();
63: }
64:
65: private static final Unsafe unsafe = Unsafe.getUnsafe();
66: private double[] loadavg = new double[1];
67:
68: public double getSystemLoadAverage() {
69: if (unsafe.getLoadAverage(loadavg, 1) == 1) {
70: return loadavg[0];
71: } else {
72: return -1.0;
73: }
74: }
75: }
|