Module jdk.management

Package com.ibm.lang.management.internal

Class ExtendedRuntimeMXBeanImpl

java.lang.Object

com.ibm.java.lang.management.internal.RuntimeMXBeanImpl

com.ibm.lang.management.internal.ExtendedRuntimeMXBeanImpl

All Implemented Interfaces:

RuntimeMXBean, PlatformManagedObject, RuntimeMXBean

public final class ExtendedRuntimeMXBeanImpl
extends com.ibm.java.lang.management.internal.RuntimeMXBeanImpl
implements RuntimeMXBean

Runtime type for RuntimeMXBean.

Since:

1.5

Nested Class Summary

Nested classes/interfaces declared in interface com.ibm.lang.management.RuntimeMXBean

RuntimeMXBean.VMIdleStates

Method Summary

Modifier and Type	Method	Description
double	getCPULoad()	Returns a double value which holds the system load average calculated for the minute preceding the call, where system load average is taken to mean the following:
static RuntimeMXBean	getInstance()	Singleton accessor method.
double	getVMGeneratedCPULoad()	Returns a system load average calculated over the minute preceding the call averaged over the number of CPU available to Java virtual machine process.
String	getVmId()	This is provided for the benefit of applications which use attach API to load JVMTI agents into their own JVMs.
RuntimeMXBean.VMIdleStates	getVMIdleState()	Returns current JVM Idle state.
boolean	isAttachApiInitialized()	Query the state of the Attach API.
boolean	isAttachApiTerminated()	Query the state of the Attach API.
boolean	isVMIdle()

Methods declared in class com.ibm.java.lang.management.internal.RuntimeMXBeanImpl

checkMonitorPermission, getBootClassPath, getClassPath, getInputArguments, getLibraryPath, getManagementSpecVersion, getName, getObjectName, getSpecName, getSpecVendor, getSpecVersion, getStartTime, getSystemProperties, getUptime, getVmName, getVmVendor, getVmVersion, isBootClassPathSupported

Methods declared in class java.lang.Object

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

Methods declared in interface java.lang.management.PlatformManagedObject

getObjectName

Methods declared in interface java.lang.management.RuntimeMXBean

getBootClassPath, getClassPath, getInputArguments, getLibraryPath, getManagementSpecVersion, getName, getPid, getSpecName, getSpecVendor, getSpecVersion, getStartTime, getSystemProperties, getUptime, getVmName, getVmVendor, getVmVersion, isBootClassPathSupported

Method Details

getInstance

public static RuntimeMXBean getInstance()

Singleton accessor method.

Returns:

the RuntimeMXBeanImpl singleton.

getCPULoad

public double getCPULoad()

Returns a double value which holds the system load average calculated for the minute preceding the call, where system load average is taken to mean the following:

The time-averaged value of the sum of the number of runnable entities running on the available processors and the number of runnable entities ready and queued to run on the available processors. The averaging technique adopted can vary depending on the underlying operating system.

Specified by:

getCPULoad in interface RuntimeMXBean

Returns:

normally, the system load average as a double. If the system load average is not obtainable (e.g. because the calculation may involve an unacceptable performance impact) then a negative value is returned.

See Also:

• OperatingSystemMXBean.getSystemLoadAverage()

getVMGeneratedCPULoad

public double getVMGeneratedCPULoad()

Returns a system load average calculated over the minute preceding the call averaged over the number of CPU available to Java virtual machine process.

Specified by:

getVMGeneratedCPULoad in interface RuntimeMXBean

Returns:

A double indicating the average system load per processor. If the system load average is not available, it returns a negative value to indicate this.

getVMIdleState

public RuntimeMXBean.VMIdleStates getVMIdleState()

Returns current JVM Idle state.

Specified by:

getVMIdleState in interface RuntimeMXBean

Returns:

JVM idle state value - i.e active / idle

isVMIdle

public boolean isVMIdle()

Specified by:

isVMIdle in interface RuntimeMXBean

Returns:

true if JVM state is idle. Otherwise returns false

isAttachApiInitialized

public boolean isAttachApiInitialized()

Description copied from interface: RuntimeMXBean

Query the state of the Attach API. Return false if the Attach API is: - still initializing - disabled - terminated by VM shutdown

Specified by:

isAttachApiInitialized in interface RuntimeMXBean

Returns:

true if Attach API is initialized

isAttachApiTerminated

public boolean isAttachApiTerminated()

Description copied from interface: RuntimeMXBean

Query the state of the Attach API. Return true if the Attach API is: - disabled - terminated by VM shutdown and false if it is - still initializing - initialized and running

Specified by:

isAttachApiTerminated in interface RuntimeMXBean

Returns:

true if Attach API is terminated

getVmId

public String getVmId()

Description copied from interface: RuntimeMXBean

This is provided for the benefit of applications which use attach API to load JVMTI agents into their own JVMs.

Specified by:

getVmId in interface RuntimeMXBean

Returns:

Attach API Virtual Machine ID of this VM