Package weblogic.management.runtime

Interface JVMRuntimeMBean

All Superinterfaces:

javax.management.DynamicMBean, javax.management.MBeanRegistration, javax.management.NotificationBroadcaster, RuntimeMBean, WebLogicMBean

All Known Subinterfaces:

JRockitRuntimeMBean

@Contract
public interface JVMRuntimeMBean
extends RuntimeMBean

Provides methods for retrieving information about the Java Virtual Machine (JVM) within with the current server instance is running. You cannot change the JVM's operating parameters while the JVM is active. Instead, use the startup options that are described in the JVM's documentation.

The WebLogic JVM contains only one of these Runtime MBeans:

• If the JVM is an instance of a JRockit JDK, then the JVM contains JRockitRuntime MBean.

• Otherwise, it contains the JVMRuntimeMBean.

Method Summary

Modifier and Type	Method	Description
long	getHeapFreeCurrent()	The current amount of memory (in bytes) that is available in the JVM heap.
int	getHeapFreePercent()	Percentage of the maximum memory that is free.
long	getHeapSizeCurrent()	The current size (in bytes) of the JVM heap.
long	getHeapSizeMax()	The maximum free memory configured for this JVM.
java.lang.String	getJavaVendor()	Returns the vendor of Java.
java.lang.String	getJavaVendorVersion()	Returns the vendor version of Java.
java.lang.String	getJavaVersion()	The Java version of the JVM.
java.lang.String	getJavaVMVendor()	Returns the vendor of the JVM.
java.lang.String	getOSName()	Returns the operating system on which the JVM is running.
java.lang.String	getOSVersion()	The version of the operating system on which the JVM is running.
java.lang.String	getThreadStackDump()	JVM thread dump.
long	getUptime()	The number of milliseconds that the Virtual Machine has been running.
void	runGC()	Starts garbage collection and finalization algorithms within the JVM.

Methods inherited from interface javax.management.DynamicMBean

getAttribute, getAttributes, invoke, setAttribute, setAttributes

Methods inherited from interface javax.management.MBeanRegistration

postDeregister, postRegister, preRegister

Methods inherited from interface javax.management.NotificationBroadcaster

addNotificationListener, getNotificationInfo, removeNotificationListener

Methods inherited from interface weblogic.management.runtime.RuntimeMBean

addPropertyChangeListener, removePropertyChangeListener

Methods inherited from interface weblogic.management.WebLogicMBean

getMBeanInfo, getName, getObjectName, getParent, getType, isCachingDisabled, isRegistered, setName, setParent

Method Detail

runGC

void runGC()

Starts garbage collection and finalization algorithms within the JVM.

getHeapFreeCurrent

long getHeapFreeCurrent()

The current amount of memory (in bytes) that is available in the JVM heap.

Returns:

The heapFreeCurrent value

getHeapSizeCurrent

long getHeapSizeCurrent()

The current size (in bytes) of the JVM heap.

Returns:

The heapSizeCurrent value

getHeapSizeMax

long getHeapSizeMax()

The maximum free memory configured for this JVM.

getHeapFreePercent

int getHeapFreePercent()

Percentage of the maximum memory that is free.

getJavaVersion

java.lang.String getJavaVersion()

The Java version of the JVM.

Returns:

The javaVersion value

getJavaVendor

java.lang.String getJavaVendor()

Returns the vendor of Java.

The vendor of Java that this server runs.

Returns:

The javaVendor value

getJavaVendorVersion

java.lang.String getJavaVendorVersion()

Returns the vendor version of Java.

The vendor version of Java that this server runs.

Returns:

The javaVendorVersion value

getJavaVMVendor

java.lang.String getJavaVMVendor()

Returns the vendor of the JVM.

The vendor of the JVM that this server runs.

system property java.vm.vendor is returned

getOSName

java.lang.String getOSName()

Returns the operating system on which the JVM is running.

The operating system on which the JVM is running.

Returns:

The oSName value

getOSVersion

java.lang.String getOSVersion()

The version of the operating system on which the JVM is running.

Returns:

The oSVersion value

getThreadStackDump

java.lang.String getThreadStackDump()

JVM thread dump. Thread dump is available only on 1.5 VM

Returns:

Formatted thread dump string

getUptime

long getUptime()

The number of milliseconds that the Virtual Machine has been running.

Returns:

The uptime (in milliseconds) of the VM.