io.jaegertracing.internal.clock

Class SystemClock

java.lang.Object

io.jaegertracing.internal.clock.SystemClock

All Implemented Interfaces:

Clock

public class SystemClock
extends java.lang.Object
implements Clock

This implementation of the system-clock will provide true microseconds accurate timestamp, given that the JVM supports it (JDK 9 and above).

The actual timestamp generation implementation for both scenarios can be found in MicrosAccurateClock and MillisAccurrateClock.

Constructor Summary

Constructors

Constructor and Description
SystemClock()

Method Summary

Modifier and Type	Method and Description
long	currentNanoTicks() Returns the current value of the running Java Virtual Machine's high-resolution time source, in nanoseconds.
long	currentTimeMicros() Returns the current time in microseconds.
boolean	isMicrosAccurate()

Methods inherited from class java.lang.Object

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

Constructor Detail

SystemClock

public SystemClock()

Method Detail

currentTimeMicros

public long currentTimeMicros()

Description copied from interface: Clock

Returns the current time in microseconds.

Specified by:

currentTimeMicros in interface Clock

Returns:

the difference, measured in microseconds, between the current time and and the Epoch (that is, midnight, January 1, 1970 UTC).

currentNanoTicks

public long currentNanoTicks()

Description copied from interface: Clock

Returns the current value of the running Java Virtual Machine's high-resolution time source, in nanoseconds.

This method can only be used to measure elapsed time and is not related to any other notion of system or wall-clock time.

Specified by:

currentNanoTicks in interface Clock

Returns:

the current value of the running Java Virtual Machine's high-resolution time source, in nanoseconds

isMicrosAccurate

public boolean isMicrosAccurate()

Specified by:

isMicrosAccurate in interface Clock

Returns:

true if the time returned by Clock.currentTimeMicros() is accurate enough to calculate span duration as (end-start). If this method returns false, the JaegerTracer will use Clock.currentNanoTicks() for calculating duration instead.