io.micrometer.core.instrument

Interface Clock

All Known Implementing Classes:

MockClock

public interface Clock

Used to measure absolute and relative time.

See Also:

for a clock that can be manually advanced for use in tests.

Field Summary

Fields

Modifier and Type	Field and Description
static Clock	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

Method Detail

wallTime

long wallTime()

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.

Returns:

Wall time in milliseconds

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.

Returns:

Monotonic time in nanoseconds