org.apache.jackrabbit.oak.plugins.segment.memory

Class MemoryStore

java.lang.Object

org.apache.jackrabbit.oak.plugins.segment.memory.MemoryStore

All Implemented Interfaces:

SegmentStore

public class MemoryStore
extends Object
implements SegmentStore

A store used for in-memory operations.

Constructor Summary

Constructors

Constructor and Description
MemoryStore()
MemoryStore(org.apache.jackrabbit.oak.spi.state.NodeState root)

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
boolean	containsSegment(SegmentId id) Checks whether the identified segment exists in this store.
void	gc() Triggers removal of segments that are no longer referenceable.
org.apache.jackrabbit.oak.spi.blob.BlobStore	getBlobStore() Returns the external BlobStore (if configured) with this store
SegmentNodeState	getHead() Returns the head state.
SegmentTracker	getTracker()
org.apache.jackrabbit.oak.api.Blob	readBlob(String reference) Read a blob from external storage.
Segment	readSegment(SegmentId id) Reads the identified segment from this store.
boolean	setHead(SegmentNodeState base, SegmentNodeState head)
void	writeSegment(SegmentId id, byte[] data, int offset, int length) Writes the given segment to the segment store.

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryStore

public MemoryStore(org.apache.jackrabbit.oak.spi.state.NodeState root)
            throws IOException

Throws:

IOException

MemoryStore

public MemoryStore()
            throws IOException

Throws:

IOException

Method Detail

getTracker

public SegmentTracker getTracker()

Specified by:

getTracker in interface SegmentStore

getHead

public SegmentNodeState getHead()

Description copied from interface: SegmentStore

Returns the head state.

Specified by:

getHead in interface SegmentStore

Returns:

head state

setHead

public boolean setHead(SegmentNodeState base,
              SegmentNodeState head)

Specified by:

setHead in interface SegmentStore

containsSegment

public boolean containsSegment(SegmentId id)

Description copied from interface: SegmentStore

Checks whether the identified segment exists in this store.

Specified by:

containsSegment in interface SegmentStore

Parameters:

id - segment identifier

Returns:

true if the segment exists, false otherwise

readSegment

@Nonnull
public Segment readSegment(SegmentId id)

Description copied from interface: SegmentStore

Reads the identified segment from this store.

Specified by:

readSegment in interface SegmentStore

Parameters:

id - segment identifier

Returns:

identified segment, or a SegmentNotFoundException thrown if not found

writeSegment

public void writeSegment(SegmentId id,
                byte[] data,
                int offset,
                int length)
                  throws IOException

Description copied from interface: SegmentStore

Writes the given segment to the segment store.

Specified by:

writeSegment in interface SegmentStore

Parameters:

id - segment identifier

data - byte buffer that contains the raw contents of the segment

offset - start offset within the byte buffer

length - length of the segment

Throws:

IOException

close

public void close()

Specified by:

close in interface SegmentStore

readBlob

public org.apache.jackrabbit.oak.api.Blob readBlob(String reference)

Description copied from interface: SegmentStore

Read a blob from external storage.

Specified by:

readBlob in interface SegmentStore

Parameters:

reference - blob reference

Returns:

external blob

getBlobStore

public org.apache.jackrabbit.oak.spi.blob.BlobStore getBlobStore()

Description copied from interface: SegmentStore

Returns the external BlobStore (if configured) with this store

Specified by:

getBlobStore in interface SegmentStore

gc

public void gc()

Description copied from interface: SegmentStore

Triggers removal of segments that are no longer referenceable.

Specified by:

gc in interface SegmentStore