com.redhat.thermostat.backend.system

Class JvmStatDataExtractor

java.lang.Object

com.redhat.thermostat.backend.system.JvmStatDataExtractor

public class JvmStatDataExtractor
extends Object

A helper class to provide type-safe access to commonly used jvmstat monitors

Implementation details: For local vms, jvmstat uses a ByteBuffer corresponding to mmap()ed hsperfdata file. The hsperfdata file is updated asynchronously by the vm that created the file. The polling that jvmstat api provides is merely an abstraction over this (possibly always up-to-date) ByteBuffer. So the data this class extracts is as current as possible, and does not correspond to when the jvmstat update events fired.

Constructor Summary

Constructors

Constructor and Description
JvmStatDataExtractor(sun.jvmstat.monitor.MonitoredVm vm)

Method Summary

Methods

Modifier and Type	Method and Description
String	getCommandLine()
String	getJavaHome()
String	getJavaVersion()
String	getMainClass()
String	getVmArguments()
String	getVmInfo()
String	getVmName()
String	getVmVersion()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JvmStatDataExtractor

public JvmStatDataExtractor(sun.jvmstat.monitor.MonitoredVm vm)

Method Detail

getCommandLine

public String getCommandLine()
                      throws sun.jvmstat.monitor.MonitorException

Throws:

sun.jvmstat.monitor.MonitorException

getMainClass

public String getMainClass()
                    throws sun.jvmstat.monitor.MonitorException

Throws:

sun.jvmstat.monitor.MonitorException

getJavaVersion

public String getJavaVersion()
                      throws sun.jvmstat.monitor.MonitorException

Throws:

sun.jvmstat.monitor.MonitorException

getJavaHome

public String getJavaHome()
                   throws sun.jvmstat.monitor.MonitorException

Throws:

sun.jvmstat.monitor.MonitorException

getVmName

public String getVmName()
                 throws sun.jvmstat.monitor.MonitorException

Throws:

sun.jvmstat.monitor.MonitorException

getVmInfo

public String getVmInfo()
                 throws sun.jvmstat.monitor.MonitorException

Throws:

sun.jvmstat.monitor.MonitorException

getVmVersion

public String getVmVersion()
                    throws sun.jvmstat.monitor.MonitorException

Throws:

sun.jvmstat.monitor.MonitorException

getVmArguments

public String getVmArguments()
                      throws sun.jvmstat.monitor.MonitorException

Throws:

sun.jvmstat.monitor.MonitorException