Package org.apache.solr.blockcache

Class BlockDirectoryCache

java.lang.Object

org.apache.solr.blockcache.BlockDirectoryCache

All Implemented Interfaces:

Cache

public class BlockDirectoryCache
extends Object
implements Cache

WARNING: This API is experimental and might change in incompatible ways in the next release.

Constructor Summary

Constructors

Constructor	Description
BlockDirectoryCache(BlockCache blockCache, String path, Metrics metrics)
BlockDirectoryCache(BlockCache blockCache, String path, Metrics metrics, boolean releaseBlocks)

Method Summary

Modifier and Type	Method	Description
void	delete(String name)	Remove a file from the cache.
boolean	fetch(String name, long blockId, int blockOffset, byte[] b, int off, int lengthToReadInBlock)	Fetch the specified cache file content.
BlockCache	getBlockCache()	Expert: mostly for tests
void	releaseResources()	Release any resources associated with the cache.
void	renameCacheFile(String source, String dest)	Expert: Rename the specified file in the cache.
long	size()	Number of entries in the cache.
void	update(String name, long blockId, int blockOffset, byte[] buffer, int offset, int length)	Update the content of the specified cache file.

Methods inherited from class java.lang.Object

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

Constructor Details

BlockDirectoryCache

public BlockDirectoryCache(BlockCache blockCache,
 String path,
 Metrics metrics)

BlockDirectoryCache

public BlockDirectoryCache(BlockCache blockCache,
 String path,
 Metrics metrics,
 boolean releaseBlocks)

Method Details

getBlockCache

public BlockCache getBlockCache()

Expert: mostly for tests

WARNING: This API is experimental and might change in incompatible ways in the next release.

delete

public void delete(String name)

Description copied from interface: Cache

Remove a file from the cache.

Specified by:

delete in interface Cache

Parameters:

name - cache file name

update

public void update(String name,
 long blockId,
 int blockOffset,
 byte[] buffer,
 int offset,
 int length)

Description copied from interface: Cache

Update the content of the specified cache file. Creates cache entry if necessary.

Specified by:

update in interface Cache

fetch

public boolean fetch(String name,
 long blockId,
 int blockOffset,
 byte[] b,
 int off,
 int lengthToReadInBlock)

Description copied from interface: Cache

Fetch the specified cache file content.

Specified by:

fetch in interface Cache

Returns:

true if cached content found, otherwise return false

size

public long size()

Description copied from interface: Cache

Number of entries in the cache.

Specified by:

size in interface Cache

renameCacheFile

public void renameCacheFile(String source,
 String dest)

Description copied from interface: Cache

Expert: Rename the specified file in the cache. Allows a file to be moved without invalidating the cache.

Specified by:

renameCacheFile in interface Cache

Parameters:

source - original name

dest - final name

releaseResources

public void releaseResources()

Description copied from interface: Cache

Release any resources associated with the cache.

Specified by:

releaseResources in interface Cache