org.apache.tajo.storage

Class FSDataInputChannel

java.lang.Object

java.nio.channels.spi.AbstractInterruptibleChannel

org.apache.tajo.storage.InputChannel

org.apache.tajo.storage.SeekableInputChannel

org.apache.tajo.storage.FSDataInputChannel

All Implemented Interfaces:

Closeable, AutoCloseable, Channel, InterruptibleChannel, ReadableByteChannel, ScatteringByteChannel, SeekableChannel

public final class FSDataInputChannel
extends SeekableInputChannel

FSDataInputChannel is a NIO channel implementation of direct read ability to read from HDFS

Constructor Summary

Constructors

Constructor and Description
FSDataInputChannel(org.apache.hadoop.fs.FSDataInputStream inputStream)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	implCloseChannel()
long	position()
int	read(ByteBuffer dst)
void	seek(long offset)
long	size()

Methods inherited from class org.apache.tajo.storage.SeekableInputChannel

read, read

Methods inherited from class java.nio.channels.spi.AbstractInterruptibleChannel

begin, close, end, isOpen

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.nio.channels.Channel

close, isOpen

Constructor Detail

FSDataInputChannel

public FSDataInputChannel(org.apache.hadoop.fs.FSDataInputStream inputStream)
                   throws IOException

Throws:

IOException

Method Detail

read

public int read(ByteBuffer dst)
         throws IOException

Throws:

IOException

seek

public void seek(long offset)
          throws IOException

Throws:

IOException

position

public long position()
              throws IOException

Throws:

IOException

size

public long size()
          throws IOException

Throws:

IOException

implCloseChannel

protected void implCloseChannel()
                         throws IOException

Specified by:

implCloseChannel in class AbstractInterruptibleChannel

Throws:

IOException