1 /* |
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2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package com.sun.management; |
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27 |
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28 /** |
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29 * Platform-specific management interface for the operating system |
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30 * on which the Java virtual machine is running. |
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31 * |
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32 * <p> |
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33 * The <tt>OperatingSystemMXBean</tt> object returned by |
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34 * {@link java.lang.management.ManagementFactory#getOperatingSystemMXBean()} |
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35 * is an instance of the implementation class of this interface |
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36 * or {@link UnixOperatingSystemMXBean} interface depending on |
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37 * its underlying operating system. |
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38 * |
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39 * @author Mandy Chung |
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40 * @since 1.5 |
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41 */ |
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42 @jdk.Exported |
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43 public interface OperatingSystemMXBean extends |
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44 java.lang.management.OperatingSystemMXBean { |
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45 |
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46 /** |
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47 * Returns the amount of virtual memory that is guaranteed to |
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48 * be available to the running process in bytes, |
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49 * or <tt>-1</tt> if this operation is not supported. |
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50 * |
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51 * @return the amount of virtual memory that is guaranteed to |
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52 * be available to the running process in bytes, |
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53 * or <tt>-1</tt> if this operation is not supported. |
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54 */ |
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55 public long getCommittedVirtualMemorySize(); |
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56 |
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57 /** |
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58 * Returns the total amount of swap space in bytes. |
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59 * |
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60 * @return the total amount of swap space in bytes. |
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61 */ |
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62 public long getTotalSwapSpaceSize(); |
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63 |
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64 /** |
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65 * Returns the amount of free swap space in bytes. |
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66 * |
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67 * @return the amount of free swap space in bytes. |
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68 */ |
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69 public long getFreeSwapSpaceSize(); |
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70 |
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71 /** |
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72 * Returns the CPU time used by the process on which the Java |
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73 * virtual machine is running in nanoseconds. The returned value |
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74 * is of nanoseconds precision but not necessarily nanoseconds |
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75 * accuracy. This method returns <tt>-1</tt> if the |
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76 * the platform does not support this operation. |
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77 * |
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78 * @return the CPU time used by the process in nanoseconds, |
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79 * or <tt>-1</tt> if this operation is not supported. |
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80 */ |
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81 public long getProcessCpuTime(); |
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82 |
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83 /** |
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84 * Returns the amount of free physical memory in bytes. |
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85 * |
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86 * @return the amount of free physical memory in bytes. |
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87 */ |
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88 public long getFreePhysicalMemorySize(); |
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89 |
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90 /** |
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91 * Returns the total amount of physical memory in bytes. |
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92 * |
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93 * @return the total amount of physical memory in bytes. |
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94 */ |
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95 public long getTotalPhysicalMemorySize(); |
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96 |
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97 /** |
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98 * Returns the "recent cpu usage" for the whole system. This value is a |
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99 * double in the [0.0,1.0] interval. A value of 0.0 means that all CPUs |
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100 * were idle during the recent period of time observed, while a value |
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101 * of 1.0 means that all CPUs were actively running 100% of the time |
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102 * during the recent period being observed. All values betweens 0.0 and |
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103 * 1.0 are possible depending of the activities going on in the system. |
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104 * If the system recent cpu usage is not available, the method returns a |
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105 * negative value. |
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106 * |
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107 * @return the "recent cpu usage" for the whole system; a negative |
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108 * value if not available. |
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109 * @since 1.7 |
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110 */ |
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111 public double getSystemCpuLoad(); |
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112 |
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113 /** |
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114 * Returns the "recent cpu usage" for the Java Virtual Machine process. |
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115 * This value is a double in the [0.0,1.0] interval. A value of 0.0 means |
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116 * that none of the CPUs were running threads from the JVM process during |
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117 * the recent period of time observed, while a value of 1.0 means that all |
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118 * CPUs were actively running threads from the JVM 100% of the time |
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119 * during the recent period being observed. Threads from the JVM include |
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120 * the application threads as well as the JVM internal threads. All values |
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121 * betweens 0.0 and 1.0 are possible depending of the activities going on |
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122 * in the JVM process and the whole system. If the Java Virtual Machine |
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123 * recent CPU usage is not available, the method returns a negative value. |
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124 * |
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125 * @return the "recent cpu usage" for the Java Virtual Machine process; |
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126 * a negative value if not available. |
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127 * @since 1.7 |
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128 */ |
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129 public double getProcessCpuLoad(); |
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130 |
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131 } |
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