org.apache.maven.plugin.surefire.booterclient

Class ForkNumberBucket

java.lang.Object

org.apache.maven.plugin.surefire.booterclient.ForkNumberBucket

public final class ForkNumberBucket
extends java.lang.Object

A bucket from which fork numbers can be drawn. Any drawn number needs to be returned to the bucket, in order to keep the range of provided values delivered as small as possible.

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.concurrent.atomic.AtomicInteger	highWaterMark
private static ForkNumberBucket	INSTANCE
private java.util.Queue<java.lang.Integer>	qFree

Constructor Summary

Constructors

Modifier	Constructor and Description
private	ForkNumberBucket() Non-public constructor

Method Summary

Modifier and Type	Method and Description
static int	drawNumber()
private int	drawNumberInternal()
private int	getHighestDrawnNumber()
private static ForkNumberBucket	getInstance()
static void	returnNumber(int number)
private void	returnNumberInternal(int number)

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

private static final ForkNumberBucket INSTANCE

qFree

private final java.util.Queue<java.lang.Integer> qFree

highWaterMark

private final java.util.concurrent.atomic.AtomicInteger highWaterMark

Constructor Detail

ForkNumberBucket

private ForkNumberBucket()

Non-public constructor

Method Detail

drawNumber

public static int drawNumber()

Returns:

a fork number that is not currently in use. The value must be returned to the bucket using returnNumber(int).

returnNumber

public static void returnNumber(int number)

Parameters:

number - the number to return to the bucket so that it can be reused.

getInstance

private static ForkNumberBucket getInstance()

Returns:

a singleton instance

drawNumberInternal

private int drawNumberInternal()

Returns:

a fork number that is not currently in use. The value must be returned to the bucket using returnNumber(int).

getHighestDrawnNumber

private int getHighestDrawnNumber()

Returns:

the highest number that has been drawn

returnNumberInternal

private void returnNumberInternal(int number)

Parameters:

number - the number to return to the bucket so that it can be reused.