alluxio.network.protocol.databuffer

Class DataByteArrayChannel

java.lang.Object

alluxio.network.protocol.databuffer.DataByteArrayChannel

All Implemented Interfaces:

DataBuffer

public final class DataByteArrayChannel
extends Object
implements DataBuffer

A DataBuffer backed by a byte[].

Constructor Summary

Constructors

Constructor and Description
DataByteArrayChannel(byte[] byteArray, long offset, long length)

Method Summary

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.
int	readableBytes()
void	readBytes(byte[] dst, int dstIndex, int length) Transfers this buffer's data to the specified destination starting at the current readerIndex and increases the readerIndex by the number of the transferred bytes (= length).
void	release() Releases 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

DataByteArrayChannel

public DataByteArrayChannel(byte[] byteArray,
                            long offset,
                            long length)

Parameters:

byteArray - the array representing the data

offset - the offset into the byteArray

length - the length of the data

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

readBytes

public void readBytes(byte[] dst,
                      int dstIndex,
                      int length)

Description copied from interface: DataBuffer

Transfers this buffer's data to the specified destination starting at the current readerIndex and increases the readerIndex by the number of the transferred bytes (= length).

Specified by:

readBytes in interface DataBuffer

Parameters:

dst - the destination

dstIndex - the first index of the destination

length - the number of bytes to transfer

readableBytes

public int readableBytes()

Specified by:

readableBytes in interface DataBuffer

Returns:

the number of readable bytes remaining

release

public void release()

Description copied from interface: DataBuffer

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

Specified by:

release in interface DataBuffer