Package org.apache.hadoop.util

Class OperationDuration

java.lang.Object

org.apache.hadoop.util.OperationDuration

Direct Known Subclasses:

DurationInfo

@Public
@Unstable
public class OperationDuration
extends Object

Little duration counter.

Constructor Summary

Constructors

Constructor	Description
OperationDuration()	Instantiate.

Method Summary

Modifier and Type	Method	Description
Duration	asDuration()	Get the duration of an operation as a java Duration instance.
void	finished()	Update the finished time with the current system time.
String	getDurationString()	Return the duration as humanTime(long).
static String	humanTime(long time)	Convert to a human time of minutes:seconds.millis.
protected long	time()	Evaluate the system time.
String	toString()	Return the duration as humanTime(long).
long	value()	Get the duration in milliseconds.

Methods inherited from class java.lang.Object

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

Constructor Details

OperationDuration

public OperationDuration()

Instantiate. The start time and finished time are both set to the current clock time.

Method Details

time

protected long time()

Evaluate the system time.

Returns:

the current clock time.

finished

public void finished()

Update the finished time with the current system time.

getDurationString

public String getDurationString()

Return the duration as humanTime(long).

Returns:

a printable duration.

humanTime

public static String humanTime(long time)

Convert to a human time of minutes:seconds.millis.

Parameters:

time - time to humanize.

Returns:

a printable value.

toString

public String toString()

Return the duration as humanTime(long).

Overrides:

toString in class Object

Returns:

a printable duration.

value

public long value()

Get the duration in milliseconds.

This will be 0 until a call to finished() has been made.

Returns:

the currently recorded duration.

asDuration

public Duration asDuration()

Get the duration of an operation as a java Duration instance.

Returns:

a duration.