Package org.apache.hadoop.yarn.util

Class MonotonicClock

java.lang.Object

org.apache.hadoop.yarn.util.MonotonicClock

All Implemented Interfaces:

Clock

@Public
@Evolving
public class MonotonicClock
extends Object
implements Clock

A monotonic clock from some arbitrary time base in the past, counting in milliseconds, and not affected by settimeofday or similar system clock changes. This is appropriate to use when computing how much longer to wait for an interval to expire. This function can return a negative value and it must be handled correctly by callers. See the documentation of System#nanoTime for caveats.

Constructor Summary

Constructors

Constructor	Description
MonotonicClock()

Method Summary

Modifier and Type	Method	Description
long	getTime()	Get current time from some arbitrary time base in the past, counting in milliseconds, and not affected by settimeofday or similar system clock changes.

Methods inherited from class java.lang.Object

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

Constructor Details

MonotonicClock

public MonotonicClock()

Method Details

getTime

public long getTime()

Get current time from some arbitrary time base in the past, counting in milliseconds, and not affected by settimeofday or similar system clock changes.

Specified by:

getTime in interface Clock

Returns:

a monotonic clock that counts in milliseconds.