io.micrometer.core.instrument.step

Class StepClock

java.lang.Object

io.micrometer.core.instrument.step.StepClock

All Implemented Interfaces:

Clock

public class StepClock
extends java.lang.Object
implements Clock

Wraps a clock implementation with one that only reports wall times on exact boundaries of the step. This is used so that measurements sampled from gauges will all have the same timestamp for a given reporting interval.

Field Summary

Fields inherited from interface io.micrometer.core.instrument.Clock

SYSTEM

Constructor Summary

Constructors

Constructor and Description
StepClock(Clock impl, long step) Create a new instance.

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.

Methods inherited from class java.lang.Object

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

Constructor Detail

StepClock

public StepClock(Clock impl,
                 long step)

Create a new instance.

Method Detail

wallTime

public long wallTime()

Description copied from interface: Clock

Current wall time in milliseconds since the epoch. Typically equivalent to System.currentTimeMillis. Should not be used to determine durations. Used for timestamping metrics being pushed to a monitoring system or for determination of step boundaries (e.g. StepLong.

Specified by:

wallTime in interface Clock

Returns:

Wall time in milliseconds

monotonicTime

public long monotonicTime()

Description copied from interface: Clock

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.

Specified by:

monotonicTime in interface Clock

Returns:

Monotonic time in nanoseconds