org.apache.jackrabbit.mk.blobs

Class MemoryBlobStore

java.lang.Object

org.apache.jackrabbit.mk.blobs.AbstractBlobStore

org.apache.jackrabbit.mk.blobs.MemoryBlobStore

All Implemented Interfaces:

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

public class MemoryBlobStore
extends AbstractBlobStore

A memory blob store. Useful for testing.

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

Constructors

Constructor and Description
MemoryBlobStore()

Method Summary

Methods

Modifier and Type	Method and Description
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) Store a block of data.
int	sweep()

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryBlobStore

public MemoryBlobStore()

Method Detail

readBlockFromBackend

protected byte[] readBlockFromBackend(AbstractBlobStore.BlockId id)

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

storeBlock

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

Description copied from class: AbstractBlobStore

Store a block of data.

Specified by:

storeBlock in class AbstractBlobStore

Parameters:

digest - the content hash

level - the indirection level (0 is for user data, 1 is a list of digests that point to user data, 2 is a list of digests that point to digests, and so on). This parameter is for informational use only, and it is not required to store it unless that's easy to achieve

data - the data to be stored

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 Exception

Specified by:

mark in class AbstractBlobStore

Throws:

Exception

sweep

public int sweep()

Specified by:

sweep in class AbstractBlobStore