Package org.rostore.entity

Class BlockAllocationState

java.lang.Object

org.rostore.entity.BlockAllocationState

All Implemented Interfaces:

BlockAllocation

public class BlockAllocationState
extends Object
implements BlockAllocation

Materialized object that implements BlockAllocation

Method Summary

Modifier and Type	Method	Description
long	getLockedFreeSize()	Get number of bytes that have been free from the allocated data.
long	getPayloadSize()	Get number of bytes used by the data.
long	getTotalLockedSize()	Get number of bytes allocated for the data.
static BlockAllocationState	init()
static BlockAllocationState	init(long totalLockedSize, long lockedFreeSize, long payloadSize)	Initializes the state object
void	minus(BlockAllocation blockAllocation)	Subtracts the sizes from the provided object to this object
void	plus(BlockAllocation blockAllocation)	Adds the sizes from the provided object to this object
static BlockAllocationState	store(BlockAllocation blockAllocation)	Creates a static copy of the provided BlockAllocation
String	toString()

Methods inherited from class java.lang.Object

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

Method Details

init

public static BlockAllocationState init()

init

public static BlockAllocationState init(long totalLockedSize,
 long lockedFreeSize,
 long payloadSize)

Initializes the state object

Parameters:

totalLockedSize - the total size of the locked space

lockedFreeSize - number of bytes free in the total locked size

payloadSize - the used bytes number of total locked

Returns:

the persistent object

store

public static BlockAllocationState store(BlockAllocation blockAllocation)

Creates a static copy of the provided BlockAllocation

Parameters:

blockAllocation - the object to get data from

Returns:

the persistent block allocation

minus

public void minus(BlockAllocation blockAllocation)

Subtracts the sizes from the provided object to this object

Parameters:

blockAllocation - the provided object

plus

public void plus(BlockAllocation blockAllocation)

Adds the sizes from the provided object to this object

Parameters:

blockAllocation - the provided object

getPayloadSize

public long getPayloadSize()

Get number of bytes used by the data. This data is actively used by some payload.

Specified by:

getPayloadSize in interface BlockAllocation

Returns:

the size in bytes

getTotalLockedSize

public long getTotalLockedSize()

Get number of bytes allocated for the data. This data is locked and can't be transferred somewhere. Allocated size = Free size + used size or 0.

Specified by:

getTotalLockedSize in interface BlockAllocation

Returns:

the size in bytes

getLockedFreeSize

public long getLockedFreeSize()

Get number of bytes that have been free from the allocated data. This data can be used by the payload, but stays effectively locked unused.

Specified by:

getLockedFreeSize in interface BlockAllocation

Returns:

the size in bytes

toString

public String toString()

Overrides:

toString in class Object