org.apache.cassandra.utils

Class SystemTimeSource

java.lang.Object

org.apache.cassandra.utils.SystemTimeSource

All Implemented Interfaces:

TimeSource

public class SystemTimeSource
extends java.lang.Object
implements TimeSource

Time source backed by JVM clock.

Constructor Summary

Constructors

Constructor and Description
SystemTimeSource()

Method Summary

Modifier and Type	Method and Description
long	currentTimeMillis()
long	nanoTime()
TimeSource	sleep(long sleepFor, java.util.concurrent.TimeUnit unit) Sleep for the given amount of time.
TimeSource	sleepUninterruptibly(long sleepFor, java.util.concurrent.TimeUnit unit) Sleep for the given amount of time uninterruptibly.

Methods inherited from class java.lang.Object

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

Constructor Detail

SystemTimeSource

public SystemTimeSource()

Method Detail

currentTimeMillis

public long currentTimeMillis()

Specified by:

currentTimeMillis in interface TimeSource

Returns:

the current time in milliseconds

nanoTime

public long nanoTime()

Specified by:

nanoTime in interface TimeSource

Returns:

Returns the current time value in nanoseconds.

This method can only be used to measure elapsed time and is not related to any other notion of system or wall-clock time.

sleepUninterruptibly

public TimeSource sleepUninterruptibly(long sleepFor,
                                       java.util.concurrent.TimeUnit unit)

Description copied from interface: TimeSource

Sleep for the given amount of time uninterruptibly.

Specified by:

sleepUninterruptibly in interface TimeSource

Parameters:

sleepFor - given amout.

unit - time unit

Returns:

The time source itself after the given sleep period.

sleep

public TimeSource sleep(long sleepFor,
                        java.util.concurrent.TimeUnit unit)
                 throws java.lang.InterruptedException

Description copied from interface: TimeSource

Sleep for the given amount of time. This operation could interrupted. Hence after returning from this method, it is not guaranteed that the request amount of time has passed.

Specified by:

sleep in interface TimeSource

Parameters:

sleepFor - given amout.

unit - time unit

Returns:

The time source itself after the given sleep period.

Throws:

java.lang.InterruptedException