Top Description Fields Constructors Methods

net.sf.ehcache.store.disk.ods

public final Class FileAllocationTree

Class Inheritance

extends RegionSet

java.lang.Object
java.util.AbstractCollection
java.util.AbstractSet
net.sf.ehcache.store.disk.ods.AATreeSet
net.sf.ehcache.store.disk.ods.RegionSet
net.sf.ehcache.store.disk.ods.FileAllocationTree

Imports

java.io.IOException, .RandomAccessFile, org.slf4j.Logger, .LoggerFactory

File allocation tree allows C-like alloc/free operations on a random access file.

Author: Chris Dennis

Field Summary

Modifier and Type	Field and Description
private final RandomAccessFile	data
private long	fileSize
private static final Logger	LOGGER

Constructor Summary

Access	Constructor and Description
public	FileAllocationTree(long maxSize, RandomAccessFile file) Create a file allocation tree for the given file, capping it's size at maxSize.

Method Summary

Modifier and Type	Method and Description
public synchronized Region	alloc(long size) Allocate a new region of the given size.
private void	checkGrow(Region alloc)
private void	checkShrink(Region free)
public synchronized void	clear() Overrides net.sf.ehcache.store.disk.ods.AATreeSet.clear. Implements java.util.Set.clear, java.util.Collection.clear. Mark this whole file as free
public synchronized void	free(Region r) Mark this region as free.
public synchronized long	getFileSize() Return the current occupied size of this file.
private void	grow(long size)
public synchronized void	mark(Region r) Mark this region as used
private void	shrink(long size)

Inherited from net.sf.ehcache.store.disk.ods.RegionSet:: find find removeAndReturn

Field Detail

data	back to summary
private final RandomAccessFile data

fileSize	back to summary
private long fileSize

LOGGER	back to summary
private static final Logger LOGGER

Constructor Detail

FileAllocationTree	back to summary
public FileAllocationTree(long maxSize, RandomAccessFile file) Create a file allocation tree for the given file, capping it's size at maxSize.

Method Detail

alloc	back to summary
public synchronized Region alloc(long size) Allocate a new region of the given size.

checkGrow	back to summary
private void checkGrow(Region alloc)

checkShrink	back to summary
private void checkShrink(Region free)

clear

back to summary

public synchronized void clear()

Overrides net.sf.ehcache.store.disk.ods.AATreeSet.clear.

Implements java.util.Set.clear, java.util.Collection.clear.

Mark this whole file as free

Annotations

@Override

free	back to summary
public synchronized void free(Region r) Mark this region as free.

getFileSize	back to summary
public synchronized long getFileSize() Return the current occupied size of this file.

grow	back to summary
private void grow(long size)

mark	back to summary
public synchronized void mark(Region r) Mark this region as used

shrink	back to summary
private void shrink(long size)