Package com.atlassian.jira.ipd.filesystem

Class IpdLocalFileWriteLatencyMeter

java.lang.Object

com.atlassian.jira.ipd.filesystem.IpdLocalFileWriteLatencyMeter

public class IpdLocalFileWriteLatencyMeter
extends Object

Makes measurements of file write duration to local file system with guaranteed persistence.

Since:

9.11

Field Summary

Fields

Modifier and Type	Field	Description
protected final Clock	clock
protected final int	numberOfMeasurements
protected final Random	random
protected static final byte[]	SAMPLE_DATA

Constructor Summary

Constructors

Constructor	Description
IpdLocalFileWriteLatencyMeter(File file, int numberOfMeasurements)

Method Summary

Modifier and Type	Method	Description
static long	getMedian(List<Long> measurements)
List<Duration>	makeWriteLatencyMeasurements()
protected Duration	measureWriteLatency()

Methods inherited from class java.lang.Object

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

Field Details

SAMPLE_DATA

protected static final byte[] SAMPLE_DATA

random

protected final Random random

numberOfMeasurements

protected final int numberOfMeasurements

clock

protected final Clock clock

Constructor Details

IpdLocalFileWriteLatencyMeter

public IpdLocalFileWriteLatencyMeter(File file,
 int numberOfMeasurements)

Method Details

measureWriteLatency

protected Duration measureWriteLatency()
                                throws IOException

Throws:

IOException

makeWriteLatencyMeasurements

public List<Duration> makeWriteLatencyMeasurements()
                                            throws IOException,
InterruptedException

Throws:

IOException

InterruptedException

getMedian

public static long getMedian(List<Long> measurements)