alluxio.hadoop

Class AlluxioHdfsPositionReader

java.lang.Object

alluxio.hadoop.AlluxioHdfsPositionReader

All Implemented Interfaces:

PositionReader, Closeable, AutoCloseable

public class AlluxioHdfsPositionReader
extends Object
implements PositionReader

A wrapper class to translate Hadoop FileSystem FSDataInputStream to Alluxio FileSystem PositionReader.

Constructor Summary

Constructors

Constructor and Description
AlluxioHdfsPositionReader(org.apache.hadoop.fs.FSDataInputStream input, long fileSize)

Method Summary

Modifier and Type	Method and Description
void	close() Closes the positon reader and do cleanup job if any.
int	readInternal(long position, ReadTargetBuffer buffer, int length)

Methods inherited from class java.lang.Object

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

Methods inherited from interface alluxio.PositionReader

read, read, read, read, read

Constructor Detail

AlluxioHdfsPositionReader

public AlluxioHdfsPositionReader(org.apache.hadoop.fs.FSDataInputStream input,
                                 long fileSize)

Parameters:

input - Hadoop FileSystem FSDataInputStream

fileSize - the file size

Method Detail

readInternal

public int readInternal(long position,
                        ReadTargetBuffer buffer,
                        int length)
                 throws IOException

Specified by:

readInternal in interface PositionReader

Parameters:

position - position of the file to start reading data

buffer - target byte buffer

length - bytes to read

Returns:

bytes read, or -1 none of data is read

Throws:

IOException

close

public void close()
           throws IOException

Description copied from interface: PositionReader

Closes the positon reader and do cleanup job if any.

Specified by:

close in interface PositionReader

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException