Package com.backblaze.b2.util

Class B2ClockImpl

java.lang.Object

com.backblaze.b2.util.B2Clock

com.backblaze.b2.util.B2ClockImpl

public class B2ClockImpl
extends B2Clock

B2ClockImpl uses values from the System class to provide a "real" implementation of B2Clock whose clocks are determined by the system.

Constructor Summary

Constructors

Constructor	Description
B2ClockImpl()

Method Summary

Modifier and Type	Method	Description
long	monotonicMillis()
long	wallClockMillis()

Methods inherited from class com.backblaze.b2.util.B2Clock

get, useSimulator

Methods inherited from class java.lang.Object

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

Constructor Detail

B2ClockImpl

public B2ClockImpl()

Method Detail

monotonicMillis

public long monotonicMillis()

Specified by:

monotonicMillis in class B2Clock

Returns:

a monotonically increasing number of milliseconds. note that it has no relationship to wall clock time and will differ between different runs of the JVM. It is monotonically increasing! AND it won't wrap during any single run of a JVM. (unless the JVM runs for hundreds of of years! (2^63 nanos) / (10^9 nanos/sec) / (86400 secs/day) / (365 days/year) ~= 292 years)

wallClockMillis

public long wallClockMillis()

Specified by:

wallClockMillis in class B2Clock

Returns:

the number of milliseconds since the unix epoch. may be negative if now is before the epoch. the values returned by this represent wall clock time and might not be monotonic if the system clock is changed. time might sometimes flow at a variable speed or even backwards if the clock is being adjusted.