org.apache.zookeeper.server.persistence

Class FilePadding

java.lang.Object

org.apache.zookeeper.server.persistence.FilePadding

public class FilePadding
extends Object

Constructor Summary

Constructors

Constructor and Description
FilePadding()

Method Summary

Modifier and Type	Method and Description
static long	calculateFileSizeWithPadding(long position, long fileSize, long preAllocSize) Calculates a new file size with padding.
static long	getPreAllocSize() Getter of preAllocSize has been added for testing
void	setCurrentSize(long currentSize)
static void	setPreallocSize(long size) method to allow setting preallocate size of log file to pad the file.

Methods inherited from class java.lang.Object

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

Constructor Detail

FilePadding

public FilePadding()

Method Detail

getPreAllocSize

public static long getPreAllocSize()

Getter of preAllocSize has been added for testing

setPreallocSize

public static void setPreallocSize(long size)

method to allow setting preallocate size of log file to pad the file.

Parameters:

size - the size to set to in bytes

setCurrentSize

public void setCurrentSize(long currentSize)

calculateFileSizeWithPadding

public static long calculateFileSizeWithPadding(long position,
                                                long fileSize,
                                                long preAllocSize)

Calculates a new file size with padding. We only return a new size if the current file position is sufficiently close (less than 4K) to end of file and preAllocSize is > 0.

Parameters:

position - the point in the file we have written to

fileSize - application keeps track of the current file size

preAllocSize - how many bytes to pad

Returns:

the new file size. It can be the same as fileSize if no padding was done.