org.jgroups.util

Class TimeService

java.lang.Object

org.jgroups.util.TimeService

All Implemented Interfaces:

java.lang.Runnable

public class TimeService
extends java.lang.Object
implements java.lang.Runnable

Provides a coarse grained time service. Registers a timer task which calls and caches System.nanoTime() and returns the cached value. This is way faster than calling System.nanoTime() many times, e.g. for each received message. The granularity (interval) can be chosen by the user.

Note that use of values returned by timestamp() needs to obey the same rules as for System.nanoTime()

Since:

3.5

Author:

Bela Ban

Field Summary

Fields

Modifier and Type	Field and Description
protected long	interval
protected java.util.concurrent.Future<?>	task
protected TimeScheduler	timer
protected long	timestamp

Constructor Summary

Constructors

Constructor and Description
TimeService(TimeScheduler timer)
TimeService(TimeScheduler timer, long interval)

Method Summary

Modifier and Type	Method and Description
long	interval()
TimeService	interval(long interval)
void	run()
boolean	running()
TimeService	start()
protected void	startTask()
TimeService	stop()
protected void	stopTask()
long	timestamp() Returns the timestamp (ns)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

timer

protected TimeScheduler timer

task

protected volatile java.util.concurrent.Future<?> task

interval

protected long interval

timestamp

protected volatile long timestamp

Constructor Detail

TimeService

public TimeService(TimeScheduler timer)

TimeService

public TimeService(TimeScheduler timer,
                   long interval)

Method Detail

timestamp

public long timestamp()

Returns the timestamp (ns)

Returns:

the result of the last call to System.nanoTime() (ns)

interval

public long interval()

interval

public TimeService interval(long interval)

running

public boolean running()

start

public TimeService start()

stop

public TimeService stop()

run

public void run()

Specified by:

run in interface java.lang.Runnable

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

startTask

protected void startTask()

stopTask

protected void stopTask()