org.apache.jackrabbit.core.state.util
Class FileSystemBLOBStore

java.lang.Object
  org.apache.jackrabbit.core.state.util.FileSystemBLOBStore

All Implemented Interfaces:

BLOBStore, ResourceBasedBLOBStore

public class FileSystemBLOBStore

extends Object

implements ResourceBasedBLOBStore

FileSystemBLOBStore is a ResourceBasedBLOBStore implementation that stores BLOB data in a FileSystem.

Constructor Summary

FileSystemBLOBStore(FileSystem fs)
Creates a new FileSystemBLOBStore instance.

Method Summary

String	createId(PropertyId id, int index) Creates a unique identifier for the BLOB data associated with the given property id and value subscript.
InputStream	get(String blobId) Retrieves the BLOB data with the specified id as a binary stream.
FileSystemResource	getResource(String blobId) Retrieves the BLOB data with the specified id as a permanent resource.
void	put(String blobId, InputStream in, long size) Stores the BLOB data and returns a unique identifier.
boolean	remove(String blobId) Removes the BLOB data with the specified id.

Methods inherited from class java.lang.Object

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

Constructor Detail

FileSystemBLOBStore

public FileSystemBLOBStore(FileSystem fs)

Creates a new FileSystemBLOBStore instance.

Parameters:

fs - file system for storing the BLOB data

Method Detail

createId

public String createId(PropertyId id,
                       int index)

Creates a unique identifier for the BLOB data associated with the given property id and value subscript.

Specified by:

createId in interface BLOBStore

Parameters:

id - id of the property associated with the BLOB data

index - subscript of the value holding the BLOB data

Returns:

a string identifying the BLOB data

get

public InputStream get(String blobId)
                throws Exception

Retrieves the BLOB data with the specified id as a binary stream.

Specified by:

get in interface BLOBStore

Parameters:

blobId - identifier of the BLOB data as returned by BLOBStore.createId(PropertyId, int)

Returns:

an input stream that delivers the BLOB data

Throws:

Exception - if an error occured

put

public void put(String blobId,
                InputStream in,
                long size)
         throws Exception

Stores the BLOB data and returns a unique identifier.

Specified by:

put in interface BLOBStore

Parameters:

blobId - identifier of the BLOB data as returned by BLOBStore.createId(PropertyId, int)

in - stream containing the BLOB data

size - size of the BLOB data

Throws:

Exception - if an error occured

remove

public boolean remove(String blobId)
               throws Exception

Removes the BLOB data with the specified id.

Specified by:

remove in interface BLOBStore

Parameters:

blobId - identifier of the BLOB data as returned by BLOBStore.createId(PropertyId, int)

Returns:

true if BLOB data with the given id exists and has been successfully removed, false if there's no BLOB data with the given id.

Throws:

Exception - if an error occured

getResource

public FileSystemResource getResource(String blobId)
                               throws Exception

Retrieves the BLOB data with the specified id as a permanent resource.

Specified by:

getResource in interface ResourceBasedBLOBStore

Parameters:

blobId - identifier of the BLOB data as returned by BLOBStore.createId(PropertyId, int)

Returns:

a resource representing the BLOB data

Throws:

Exception - if an error occured