org.apache.jackrabbit.mk.blobs
Class FileBlobStore

java.lang.Object
  org.apache.jackrabbit.mk.blobs.AbstractBlobStore
      org.apache.jackrabbit.mk.blobs.FileBlobStore

All Implemented Interfaces:

BlobStore, Cache.Backend<AbstractBlobStore.BlockId,AbstractBlobStore.Data>

public class FileBlobStore
extends AbstractBlobStore

A file blob store.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.jackrabbit.mk.blobs.AbstractBlobStore

AbstractBlobStore.BlockId, AbstractBlobStore.Data

Field Summary

Fields inherited from class org.apache.jackrabbit.mk.blobs.AbstractBlobStore

BLOCK_SIZE_LIMIT, HASH_ALGORITHM, inUse, TYPE_DATA, TYPE_HASH, TYPE_HASH_COMPRESSED

Constructor Summary

FileBlobStore(String dir)

Method Summary

protected boolean	isMarkEnabled()
protected void	mark(AbstractBlobStore.BlockId id)
protected byte[]	readBlockFromBackend(AbstractBlobStore.BlockId id) Load the block from the storage backend.
void	startMark()
protected void	storeBlock(byte[] digest, int level, byte[] data)
int	sweep()
String	writeBlob(String tempFilePath) Write a blob from a temporary file.

Methods inherited from class org.apache.jackrabbit.mk.blobs.AbstractBlobStore

clearCache, clearInUse, getBlobLength, getBlockSize, getBlockSizeMin, load, mark, markInUse, readBlob, setBlockSize, setBlockSizeMin, usesBlobId, writeBlob

Methods inherited from class java.lang.Object

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

Constructor Detail

FileBlobStore

public FileBlobStore(String dir)
              throws IOException

Throws:

IOException

Method Detail

writeBlob

public String writeBlob(String tempFilePath)
                 throws Exception

Description copied from class: AbstractBlobStore

Write a blob from a temporary file. The temporary file is removed afterwards. A file based blob stores might simply rename the file, so that no additional writes are necessary.

Overrides:

writeBlob in class AbstractBlobStore

Parameters:

tempFilePath - the temporary file

Returns:

the blob id

Throws:

Exception

storeBlock

protected void storeBlock(byte[] digest,
                          int level,
                          byte[] data)
                   throws IOException

Specified by:

storeBlock in class AbstractBlobStore

Throws:

IOException

readBlockFromBackend

protected byte[] readBlockFromBackend(AbstractBlobStore.BlockId id)
                               throws IOException

Description copied from class: AbstractBlobStore

Load the block from the storage backend. Returns null if the block was not found.

Specified by:

readBlockFromBackend in class AbstractBlobStore

Parameters:

id - the block id

Returns:

the block data, or null

Throws:

IOException

startMark

public void startMark()
               throws Exception

Specified by:

startMark in class AbstractBlobStore

Throws:

Exception

isMarkEnabled

protected boolean isMarkEnabled()

Specified by:

isMarkEnabled in class AbstractBlobStore

mark

protected void mark(AbstractBlobStore.BlockId id)
             throws IOException

Specified by:

mark in class AbstractBlobStore

Throws:

IOException

sweep

public int sweep()
          throws IOException

Specified by:

sweep in class AbstractBlobStore

Throws:

IOException