org.apache.jackrabbit.mk.blobs

Class DbBlobStore

java.lang.Object

org.apache.jackrabbit.mk.blobs.AbstractBlobStore

org.apache.jackrabbit.mk.blobs.DbBlobStore

All Implemented Interfaces:

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

public class DbBlobStore
extends AbstractBlobStore

A database 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

Constructors

Constructor and Description
DbBlobStore()

Method Summary

Methods

Modifier and Type	Method and Description
protected boolean	isMarkEnabled()
protected void	mark(AbstractBlobStore.BlockId blockId)
protected byte[]	readBlockFromBackend(AbstractBlobStore.BlockId blockId) Load the block from the storage backend.
void	setConnectionPool(org.h2.jdbcx.JdbcConnectionPool cp)
void	startMark() Start the mark phase.
protected void	storeBlock(byte[] digest, int level, byte[] data) Store a block of data.
int	sweep() Remove all unused blocks.

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

DbBlobStore

public DbBlobStore()

Method Detail

setConnectionPool

public void setConnectionPool(org.h2.jdbcx.JdbcConnectionPool cp)
                       throws SQLException

Throws:

SQLException

storeBlock

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

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

Throws:

IOException

readBlockFromBackend

protected byte[] readBlockFromBackend(AbstractBlobStore.BlockId blockId)
                               throws Exception

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:

blockId - the block id

Returns:

the block data, or null

Throws:

Exception

startMark

public void startMark()
               throws IOException

Description copied from interface: GarbageCollectableBlobStore

Start the mark phase.

Specified by:

startMark in interface GarbageCollectableBlobStore

Specified by:

startMark in class AbstractBlobStore

Throws:

IOException

isMarkEnabled

protected boolean isMarkEnabled()

Specified by:

isMarkEnabled in class AbstractBlobStore

mark

protected void mark(AbstractBlobStore.BlockId blockId)
             throws Exception

Specified by:

mark in class AbstractBlobStore

Throws:

Exception

sweep

public int sweep()
          throws IOException

Description copied from interface: GarbageCollectableBlobStore

Remove all unused blocks.

Specified by:

sweep in interface GarbageCollectableBlobStore

Specified by:

sweep in class AbstractBlobStore

Returns:

the number of removed blocks

Throws:

IOException