com.netflix.spectator.api

Interface Clock

All Known Implementing Classes:

ManualClock

public interface Clock

A timing source that can be used to access the current wall time as well as a high resolution monotonic time to measuring elapsed times. Most of the time the SYSTEM implementation that calls the builtin java methods is probably the right one to use. Other implementations would typically only get used for unit tests or other cases where precise control of the clock is needed.

Field Summary

Fields

Modifier and Type	Field and Description
static Clock	SYSTEM Default clock implementation based on corresponding calls in System.

Method Summary

Modifier and Type	Method and Description
long	monotonicTime() Current time from a monotonic clock source.
long	wallTime() Current wall time in milliseconds since the epoch.

Field Detail

SYSTEM

static final Clock SYSTEM

Default clock implementation based on corresponding calls in System.

Method Detail

wallTime

long wallTime()

Current wall time in milliseconds since the epoch. Typically equivalent to System.currentTimeMillis.

monotonicTime

long monotonicTime()

Current time from a monotonic clock source. The value is only meaningful when compared with another snapshot to determine the elapsed time for an operation. The difference between two samples will have a unit of nanoseconds. The returned value is typically equivalent to System.nanoTime.