com.att.eelf.utils

Class Stopwatch

java.lang.Object

com.att.eelf.utils.Stopwatch

public class Stopwatch
extends Object

This class is used to time events to determine their duration. The stop watch allows for the same types of operations as a real stop watch, that is, it allows the timing to be stopped, started, cleared, and read. The accumulated time is the total of all times between start and stop events. The watch can be repeatedly stopped and restarted, and will accumulate all durations between start/stop pairs.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Stopwatch.StopwatchState This is the object that maintains our state on the thread local storage

Field Summary

Fields

Modifier and Type	Field and Description
static String	ISO_FORMAT
static SimpleDateFormat	isoFormatter
static TimeZone	utc

Constructor Summary

Constructors

Constructor and Description
Stopwatch()

Method Summary

Modifier and Type	Method and Description
static void	clear() Clears (and possibly stops) the watch.
static double	getCurrentDuration() Gets the amount of time since the stop watch was last started without stopping the watch or accumulating the previous time.
static long	getDuration() The accumulated duration of the watch (in nano-seconds)
static boolean	isRunning() Determines if the stopwatch is currently running or not
static void	start() Starts the watch if not already running.
static void	stop() Stops the accumulation of time on the watch if running

Methods inherited from class java.lang.Object

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

Field Detail

ISO_FORMAT

public static String ISO_FORMAT

utc

public static final TimeZone utc

isoFormatter

public static final SimpleDateFormat isoFormatter

Constructor Detail

Stopwatch

public Stopwatch()

Method Detail

clear

public static void clear()

Clears (and possibly stops) the watch.

getDuration

public static long getDuration()

The accumulated duration of the watch (in nano-seconds)

Returns:

The accumulated time

isRunning

public static boolean isRunning()

Determines if the stopwatch is currently running or not

Returns:

True if the watch is running

start

public static void start()

Starts the watch if not already running.

stop

public static void stop()

Stops the accumulation of time on the watch if running

getCurrentDuration

public static double getCurrentDuration()

Gets the amount of time since the stop watch was last started without stopping the watch or accumulating the previous time.

Returns:

the duration in milliseconds if still running, otherwise 0