jodd.cache
Class FileLFUCache

java.lang.Object
  jodd.cache.FileLFUCache

public class FileLFUCache
extends java.lang.Object

Files LFU cache stores files content in memory to dramatically speed up performances for frequently read files.

Field Summary

protected LFUCache<java.io.File,byte[]>	cache
protected int	maxFileSize
protected int	maxSize
protected int	usedSize

Constructor Summary

FileLFUCache(int maxSize)
Creates file LFU cache with specified size.

FileLFUCache(int maxSize, int maxFileSize)

FileLFUCache(int maxSize, int maxFileSize, long timeout)
Creates new File LFU cache.

Method Summary

void	clear() Clears the cache.
int	getCachedFilesCount() Returns number of cached files.
long	getCacheTimeout() Returns timeout.
byte[]	getFileBytes(java.io.File file) Returns cached file bytes.
byte[]	getFileBytes(java.lang.String fileName)
int	getMaxFileSize() Returns maximum allowed file size that can be added to the cache.
int	getMaxSize() Returns max cache size in bytes.
int	getUsedSize() Returns actually used size in bytes.

Methods inherited from class java.lang.Object

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

Field Detail

cache

protected final LFUCache<java.io.File,byte[]> cache

maxSize

protected final int maxSize

maxFileSize

protected final int maxFileSize

usedSize

protected int usedSize

Constructor Detail

FileLFUCache

public FileLFUCache(int maxSize)

Creates file LFU cache with specified size. Sets max available file size to half of this value.

FileLFUCache

public FileLFUCache(int maxSize,
                    int maxFileSize)

FileLFUCache

public FileLFUCache(int maxSize,
                    int maxFileSize,
                    long timeout)

Creates new File LFU cache.

Parameters:

maxSize - total cache size in bytes

maxFileSize - max available file size in bytes, may be 0

timeout - timeout, may be 0

Method Detail

getMaxSize

public int getMaxSize()

Returns max cache size in bytes.

getUsedSize

public int getUsedSize()

Returns actually used size in bytes.

getMaxFileSize

public int getMaxFileSize()

Returns maximum allowed file size that can be added to the cache. Files larger than this value will be not added, even if there is enough room.

getCachedFilesCount

public int getCachedFilesCount()

Returns number of cached files.

getCacheTimeout

public long getCacheTimeout()

Returns timeout.

clear

public void clear()

Clears the cache.

getFileBytes

public byte[] getFileBytes(java.lang.String fileName)
                    throws java.io.IOException

Throws:

java.io.IOException

getFileBytes

public byte[] getFileBytes(java.io.File file)
                    throws java.io.IOException

Returns cached file bytes.

Throws:

java.io.IOException