Package org.apache.jackrabbit.oak.spi.blob

Class MemoryBlobStore

java.lang.Object

org.apache.jackrabbit.oak.spi.blob.AbstractBlobStore

org.apache.jackrabbit.oak.spi.blob.MemoryBlobStore

All Implemented Interfaces:

java.lang.AutoCloseable, Cache.Backend<AbstractBlobStore.BlockId,AbstractBlobStore.Data>, BlobStore, GarbageCollectableBlobStore

public class MemoryBlobStore
extends AbstractBlobStore

A memory blob store. Useful for testing.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.jackrabbit.oak.spi.blob.AbstractBlobStore

AbstractBlobStore.BlockId, AbstractBlobStore.Data

Field Summary

Fields inherited from class org.apache.jackrabbit.oak.spi.blob.AbstractBlobStore

BLOCK_SIZE_LIMIT, HASH_ALGORITHM, inUse, TYPE_DATA, TYPE_HASH

Constructor Summary

Constructors

Constructor	Description
MemoryBlobStore()

Method Summary

Modifier and Type	Method	Description
void	clearCache()	Clear the cache.
long	countDeleteChunks(java.util.List<java.lang.String> chunkIds, long maxLastModifiedTime)	Ignores the maxlastModifiedTime
java.util.Iterator<java.lang.String>	getAllChunkIds(long maxLastModifiedTime)	Ignores the maxlastModifiedTime
protected boolean	isMarkEnabled()
protected void	mark(AbstractBlobStore.BlockId id)
protected byte[]	readBlockFromBackend(AbstractBlobStore.BlockId id)	Load the block from the storage backend.
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.oak.spi.blob.AbstractBlobStore

clearInUse, close, deleteChunks, getBlobId, getBlobLength, getBlockSize, getBlockSizeMin, getInputStream, getOrCreateReferenceKey, getReference, getStatsCollector, load, mark, markInUse, readBlob, resolveChunks, setBlockSize, setBlockSizeMin, setReferenceKey, setReferenceKeyEncoded, setReferenceKeyPlainText, setStatsCollector, usesBlobId, writeBlob, 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 (32 bytes)

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 (the number of bytes is at most the block size)

startMark

public void startMark()
               throws java.io.IOException

Description copied from interface: GarbageCollectableBlobStore

Start the mark phase.

Specified by:

startMark in interface GarbageCollectableBlobStore

Specified by:

startMark in class AbstractBlobStore

Throws:

java.io.IOException

isMarkEnabled

protected boolean isMarkEnabled()

Specified by:

isMarkEnabled in class AbstractBlobStore

mark

protected void mark(AbstractBlobStore.BlockId id)

Specified by:

mark in class AbstractBlobStore

sweep

public int sweep()

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

countDeleteChunks

public long countDeleteChunks(java.util.List<java.lang.String> chunkIds,
                              long maxLastModifiedTime)
                       throws java.lang.Exception

Ignores the maxlastModifiedTime

Parameters:

chunkIds - the chunk ids

maxLastModifiedTime - the max last modified time to consider for retrieval, with the special value '0' meaning no filtering by time

Returns:

long the count of successful deletions

Throws:

java.lang.Exception - the exception

getAllChunkIds

public java.util.Iterator<java.lang.String> getAllChunkIds(long maxLastModifiedTime)
                                                    throws java.lang.Exception

Ignores the maxlastModifiedTime

Parameters:

maxLastModifiedTime - the max last modified time to consider for retrieval, with the special value '0' meaning no filtering by time

Returns:

the identifiers

Throws:

java.lang.Exception - the exception

clearCache

public void clearCache()

Description copied from interface: GarbageCollectableBlobStore

Clear the cache.