JVMRuntimeMBean (Java API Reference for Oracle WebLogic Server)

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Oracle Fusion Middleware
Java API Reference for Oracle WebLogic Server
12c (12.2.1)

Part Number E55141-01
P4 Change 1723563 on 2015/10/09

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weblogic.management.runtime
Interface JVMRuntimeMBean

All Superinterfaces:: DynamicMBean, MBeanRegistration, NotificationBroadcaster, RuntimeMBean, WebLogicMBean

All Known Subinterfaces:: JRockitRuntimeMBean

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
`abstract long`	`getHeapFreeCurrent()` The current amount of memory (in bytes) that is available in the JVM heap.
`abstract int`	`getHeapFreePercent()` Percentage of the maximum memory that is free.
`abstract long`	`getHeapSizeCurrent()` The current size (in bytes) of the JVM heap.
`abstract long`	`getHeapSizeMax()` The maximum free memory configured for this JVM.
`abstract String`	`getJavaVendor()` Returns the vendor of Java.
`abstract String`	`getJavaVersion()` The Java version of the JVM.
`abstract String`	`getJavaVMVendor()` Returns the vendor of the JVM.
`abstract String`	`getOSName()` Returns the operating system on which the JVM is running.
`abstract String`	`getOSVersion()` The version of the operating system on which the JVM is running.
`abstract String`	`getThreadStackDump()` JVM thread dump.
`abstract long`	`getUptime()` The number of milliseconds that the Virtual Machine has been running.

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`

Methods inherited from interface javax.management.DynamicMBean
`getAttribute, getAttributes, invoke, setAttribute, setAttributes`

Methods inherited from interface javax.management.MBeanRegistration
`postDeregister, postRegister, preDeregister, preRegister`

Methods inherited from interface javax.management.NotificationBroadcaster
`addNotificationListener, getNotificationInfo, removeNotificationListener`

Method Detail

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

String getJavaVersion()

The Java version of the JVM.

Returns:: The javaVersion value

getJavaVendor

String getJavaVendor()

Returns the vendor of Java.

The vendor of Java that this server runs.

Returns:: The javaVendor value

getJavaVMVendor

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

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

String getOSVersion()

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

Returns:: The oSVersion value

getThreadStackDump

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.

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