com.github.jlangch.venice.impl.util

Class StopWatch

java.lang.Object

com.github.jlangch.venice.impl.util.StopWatch

public class StopWatch
extends java.lang.Object

A stop watch

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	StopWatch.Resolution

Constructor Summary

Constructors

Constructor and Description
StopWatch() Create a new stop watch (with milliseconds resolution).
StopWatch(StopWatch.Resolution resolution) Create a new stop watch.

Method Summary

Modifier and Type	Method and Description
long	elapsedMillis() Returns the elapsed time of this stop watch.
long	elapsedNanos() Returns the elapsed time of this stop watch.
static java.lang.String	formatMillis(long millis) Formats an elapsed time given in milliseconds
static java.lang.String	formatNanos(long nanos) Formats an elapsed time given in nanoseconds
static StopWatch	millis() Create a new stop watch (with milliseconds resolution).
static StopWatch	nanos() Create a new stop watch (with nanoseconds resolution).
long	splitTime() Returns the split time
StopWatch	start() Restart the stop watch setting the start time to now
StopWatch	stop() Stops the stop watch setting the elapsed time to now - start time.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

StopWatch

public StopWatch()

Create a new stop watch (with milliseconds resolution). Start time is now

StopWatch

public StopWatch(StopWatch.Resolution resolution)

Create a new stop watch. Start time is now

Parameters:

resolution - the resolution

Method Detail

millis

public static StopWatch millis()

Create a new stop watch (with milliseconds resolution). Start time is now

Returns:

a StopWatch with milliseconds resolution

nanos

public static StopWatch nanos()

Create a new stop watch (with nanoseconds resolution). Start time is now

Returns:

a StopWatch with nanoseconds resolution

start

public StopWatch start()

Restart the stop watch setting the start time to now

Returns:

this stop watch

stop

public StopWatch stop()

Stops the stop watch setting the elapsed time to now - start time.

A stop watch may be stopped multiple times each time setting the elapsed time to now - start time.

Returns:

this stop watch

elapsedMillis

public long elapsedMillis()

Returns the elapsed time of this stop watch.

Returns:

the elapsed time or 0 if the watch has not been stopped.

elapsedNanos

public long elapsedNanos()

Returns the elapsed time of this stop watch.

Returns:

the elapsed time or 0 if the watch has not been stopped.

splitTime

public long splitTime()

Returns the split time

Returns:

the split time

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

formatMillis

public static java.lang.String formatMillis(long millis)

Formats an elapsed time given in milliseconds

Formats chosen

• 245ms - for elapsed times < 1s
• 45s 245ms - for elapsed times < 1m
• 10m 45s - for elapsed times >= 1m

Parameters:

millis - a duration in milliseconds

Returns:

the formatted time

formatNanos

public static java.lang.String formatNanos(long nanos)

Formats an elapsed time given in nanoseconds

Formats chosen

• 245ns - for elapsed times < 1us
• 45.245us - for elapsed times < 1ms
• 45.245ms- for elapsed times < 1s
• 45.245s - for elapsed times > 1s

Parameters:

nanos - a duration in nanoseconds

Returns:

the formatted time