Package com.yourkit.probes

Class JVM

java.lang.Object

com.yourkit.probes.JVM

public final class JVM
extends Object

Provides native methods needed in some built-in probes.

Method Summary

Modifier and Type	Method	Description
static long	getPersistentObjectId(Object object)	Obtain the persistent ID for the specified object.
static boolean	isLivePhase()	Check whether the JVM is in its live phase.
static boolean	isProfilerAgentThread(String threadName)	Check whether thread name belongs to a profiler thread.

Methods inherited from class java.lang.Object

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

Method Details

isLivePhase

public static boolean isLivePhase()

Check whether the JVM is in its live phase. The live phase begins as soon as the JVM has completed its initialization, and ends when the JVM starts its the shut down activities. Some probe activities should be undertaken in the live phase only.

isProfilerAgentThread

public static boolean isProfilerAgentThread(@Nullable
 String threadName)

Check whether thread name belongs to a profiler thread.

getPersistentObjectId

public static long getPersistentObjectId(@NotNull
 Object object)

Obtain the persistent ID for the specified object.

Parameters:

object - may not be NULL

Returns:

If the object already has the persistent ID assigned, it will be returned. Otherwise a new unique ID is assigned to the object and returned.

The valid ID is never 0. However, it may happen that in some early (VM initialization) or late (VM shutdown) stages of the JVM life cycle the ID cannot be assigned to the object, in which case the method returns 0.