tachyon.worker

Class SpaceCounter

java.lang.Object

tachyon.worker.SpaceCounter

public class SpaceCounter
extends Object

The worker space counter, in charge of counting and granting spaces in a worker daemon.

Constructor Summary

Constructors

Constructor and Description
SpaceCounter(long capacityBytes)

Method Summary

Methods

Modifier and Type	Method and Description
long	getAvailableBytes()
long	getCapacityBytes()
long	getUsedBytes()
boolean	requestSpaceBytes(long requestSpaceBytes) Request space
void	returnUsedBytes(long returnUsedBytes) Return used space size
String	toString()
void	updateUsedBytes(long usedBytes) Update the used bytes

Methods inherited from class java.lang.Object

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

Constructor Detail

SpaceCounter

public SpaceCounter(long capacityBytes)

Parameters:

capacityBytes - The maximum memory space the TachyonWorker can use, in bytes

Method Detail

getAvailableBytes

public long getAvailableBytes()

Returns:

The available space size, in bytes

getCapacityBytes

public long getCapacityBytes()

Returns:

The maximum memory space the TachyonWorker can use, in bytes

getUsedBytes

public long getUsedBytes()

Returns:

The bytes that have been used

requestSpaceBytes

public boolean requestSpaceBytes(long requestSpaceBytes)

Request space

Parameters:

requestSpaceBytes - The requested space size, in bytes

Returns:

true if the request succeed, false otherwise.

returnUsedBytes

public void returnUsedBytes(long returnUsedBytes)

Return used space size

Parameters:

returnUsedBytes - The returned space size, in bytes

toString

public String toString()

Overrides:

toString in class Object

updateUsedBytes

public void updateUsedBytes(long usedBytes)

Update the used bytes

Parameters:

usedBytes - The new used bytes