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1
24 package org.objectweb.jalisto.se.jmx;
25
26 import javax.management.*;
27
28
29 public class MemoryAdmin extends JalistoAbstractDynamicMBean {
30
31 public MemoryAdmin(String  propertiesPath) {
32 }
33
34 public float getFreeMemorySize() {
35 return ((float) Runtime.getRuntime().freeMemory()) / mo;
36 }
37
38 public float getTotalMemorySize() {
39 return ((float) Runtime.getRuntime().totalMemory()) / mo;
40 }
41
42 public float getUsedMemorySize() {
43 return ((float) (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory())) / mo;
44 }
45
46
47
48
49 public MBeanInfo getMBeanInfo() {
50 if (infos == null) {
51 MBeanAttributeInfo[] attributesInfos = new MBeanAttributeInfo[3];
52 attributesInfos[0] = new MBeanAttributeInfo(
53 "FreeMemorySize",
54 "java.lang.Float",
55 "Size in Mo of free memory allocated to the JVM.",
56 true,
57 false,
58 false);
59 attributesInfos[1] = new MBeanAttributeInfo(
60 "TotalMemorySize",
61 "java.lang.Float",
62 "Size in Mo of memory allocated to the JVM.",
63 true,
64 false,
65 false);
66 attributesInfos[2] = new MBeanAttributeInfo(
67 "UsedMemorySize",
68 "java.lang.Float",
69 "Size in Mo of used memory allocated to the JVM.",
70 true,
71 false,
72 false);
73
74 infos = new MBeanInfo(this.getClass().getName(),
75 "Administration MBean to watch memory used by Jalisto",
76 attributesInfos,
77 new MBeanConstructorInfo[0],
78 new MBeanOperationInfo[0],
79 new MBeanNotificationInfo[0]);
80 }
81 return infos;
82 }
83
84 protected Object internalGetAttribute(String attributeName)
85 throws AttributeNotFoundException, MBeanException, ReflectionException {
86 if (attributeName.equals("FreeMemorySize")) {
87 return new Float (getFreeMemorySize());
88 }
89 if (attributeName.equals("TotalMemorySize")) {
90 return new Float (getTotalMemorySize());
91 }
92 if (attributeName.equals("UsedMemorySize")) {
93 return new Float (getUsedMemorySize());
94 }
95
96 throw(new AttributeNotFoundException(
97 "Cannot find " + attributeName + " attribute in " + this.getClass().getName()));
98 }
99
100 protected boolean internalSetAttribute(String name, Object value)
101 throws AttributeNotFoundException, InvalidAttributeValueException, MBeanException, ReflectionException {
102 if (name.equals("FreeMemorySize")) {
103 throw(new AttributeNotFoundException(
104 "Cannot set attribute " + name + " because it is read-only"));
105 } else if (name.equals("TotalMemorySize")) {
106 throw(new AttributeNotFoundException(
107 "Cannot set attribute " + name + " because it is read-only"));
108 } else if (name.equals("UsedMemorySize")) {
109 throw(new AttributeNotFoundException(
110 "Cannot set attribute " + name + " because it is read-only"));
111 }
112 return false;
113 }
114
115 protected Object internalInvoke(String operationName, Object [] params, String [] signature)
116 throws MBeanException, ReflectionException {
117 throw new ReflectionException(new NoSuchMethodException (operationName),
118 "Cannot find the operation " + operationName +
119 " in " + this.getClass().getName());
120 }
121
122
123 private MBeanInfo infos;
124
125 private static final int mo = 1024 * 1024;
126 }
127 |
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