tachyon.network.protocol.databuffer

Class DataFileChannel

java.lang.Object

tachyon.network.protocol.databuffer.DataFileChannel

All Implemented Interfaces:

DataBuffer

public final class DataFileChannel
extends Object
implements DataBuffer

A DataBuffer with the underlying data being a FileChannel.

Constructor Summary

Constructors

Constructor and Description
DataFileChannel(FileChannel fileChannel, long offset, long length)

Method Summary

Methods

Modifier and Type	Method and Description
long	getLength() Returns the length of the data.
Object	getNettyOutput() Returns an object for writing to a netty channel.
ByteBuffer	getReadOnlyByteBuffer() Returns a ByteBuffer for read-only access to the data.
void	release() Release the underlying buffer of this DataBuffer if no longer needed.

Methods inherited from class java.lang.Object

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

Constructor Detail

DataFileChannel

public DataFileChannel(FileChannel fileChannel,
               long offset,
               long length)

Parameters:

fileChannel - The FileChannel representing the data

offset - The offset into the FileChannel

length - The length of the data to read

Method Detail

getNettyOutput

public Object getNettyOutput()

Description copied from interface: DataBuffer

Returns an object for writing to a netty channel.

Specified by:

getNettyOutput in interface DataBuffer

Returns:

the object to output to Netty. Must be ByteBuf or FileRegion

getLength

public long getLength()

Description copied from interface: DataBuffer

Returns the length of the data.

Specified by:

getLength in interface DataBuffer

Returns:

the length of the data in bytes

getReadOnlyByteBuffer

public ByteBuffer getReadOnlyByteBuffer()

Description copied from interface: DataBuffer

Returns a ByteBuffer for read-only access to the data.

Specified by:

getReadOnlyByteBuffer in interface DataBuffer

Returns:

a read-only ByteBuffer representing the data

release

public void release()

Description copied from interface: DataBuffer

Release the underlying buffer of this DataBuffer if no longer needed.

Specified by:

release in interface DataBuffer