org.apache.jackrabbit.mongomk.blob.gridfs

Class ReadBlobCommandGridFS

java.lang.Object

org.apache.jackrabbit.mongomk.blob.gridfs.BaseCommand<Integer>

org.apache.jackrabbit.mongomk.blob.gridfs.ReadBlobCommandGridFS

All Implemented Interfaces:

Command<Integer>

public class ReadBlobCommandGridFS
extends BaseCommand<Integer>

Command for MongoMicroKernel#read(String, long, byte[], int, int) FIXME - Reading from large blobs with small increments is slow in this implementation. See if this could be improved with some kind of cache mechanism.

Constructor Summary

Constructors

Constructor and Description
ReadBlobCommandGridFS(com.mongodb.gridfs.GridFS gridFS, String blobId, long blobOffset, byte[] buffer, int bufferOffset, int length) Constructs a new ReadBlobCommandMongo.

Method Summary

Methods

Modifier and Type	Method and Description
Integer	execute() Executes the Command and returns its result.

Methods inherited from class org.apache.jackrabbit.mongomk.blob.gridfs.BaseCommand

getNumOfRetries, needsRetry, needsRetry

Methods inherited from class java.lang.Object

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

Constructor Detail

ReadBlobCommandGridFS

public ReadBlobCommandGridFS(com.mongodb.gridfs.GridFS gridFS,
                     String blobId,
                     long blobOffset,
                     byte[] buffer,
                     int bufferOffset,
                     int length)

Constructs a new ReadBlobCommandMongo.

Parameters:

gridFS - GridFS instance.

blobId - Blob id.

blobOffset - Blob offset.

buffer - Buffer.

bufferOffset - Buffer offset.

length - Length.

Method Detail

execute

public Integer execute()
                throws Exception

Description copied from interface: Command

Executes the Command and returns its result.

Returns:

The result.

Throws:

Exception - If an error occurred while executing.