io.druid.common.utils

Class VMUtils

java.lang.Object

io.druid.common.utils.VMUtils

public class VMUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
VMUtils()

Method Summary

Modifier and Type	Method and Description
static long	getCurrentThreadCpuTime() Returns the total CPU time for current thread.
static long	getMaxDirectMemory()
static boolean	isThreadCpuTimeEnabled()
static long	safeGetThreadCpuTime()

Methods inherited from class java.lang.Object

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

Constructor Detail

VMUtils

public VMUtils()

Method Detail

isThreadCpuTimeEnabled

public static boolean isThreadCpuTimeEnabled()

safeGetThreadCpuTime

public static long safeGetThreadCpuTime()

getCurrentThreadCpuTime

public static long getCurrentThreadCpuTime()

Returns the total CPU time for current thread. This method should be called after verifying that cpu time measurement for current thread is supported by JVM

Returns:

total CPU time for the current thread in nanoseconds.

Throws:

UnsupportedOperationException - if the Java virtual machine does not support CPU time measurement for the current thread.

getMaxDirectMemory

public static long getMaxDirectMemory()
                               throws UnsupportedOperationException

Throws:

UnsupportedOperationException