alluxio.hadoop

Class HdfsFileInputStream

java.lang.Object

java.io.InputStream

alluxio.hadoop.BaseHdfsFileInputStream

alluxio.hadoop.HdfsFileInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, org.apache.hadoop.fs.ByteBufferReadable, org.apache.hadoop.fs.CanUnbuffer, org.apache.hadoop.fs.PositionedReadable, org.apache.hadoop.fs.Seekable, org.apache.hadoop.fs.StreamCapabilities

@NotThreadSafe
public class HdfsFileInputStream
extends BaseHdfsFileInputStream
implements org.apache.hadoop.fs.CanUnbuffer, org.apache.hadoop.fs.StreamCapabilities

HdfsFileInputStream implement for hadoop 3. This is just a wrapper around HdfsFileInputStream with CanUnbuffer and StreamCapabilities support.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.fs.StreamCapabilities

org.apache.hadoop.fs.StreamCapabilities.StreamCapability

Field Summary

Fields inherited from class alluxio.hadoop.BaseHdfsFileInputStream

mInputStream

Fields inherited from interface org.apache.hadoop.fs.StreamCapabilities

ABORTABLE_STREAM, DROPBEHIND, HFLUSH, HSYNC, IOSTATISTICS, PREADBYTEBUFFER, READAHEAD, READBYTEBUFFER, UNBUFFER

Constructor Summary

Constructors

Constructor and Description
HdfsFileInputStream(FileInStream inputStream, org.apache.hadoop.fs.FileSystem.Statistics stats) Constructs a new stream for reading a file from HDFS.
HdfsFileInputStream(FileSystem fs, AlluxioURI uri, org.apache.hadoop.fs.FileSystem.Statistics stats) Constructs a new stream for reading a file from HDFS.

Method Summary

Modifier and Type	Method and Description
boolean	hasCapability(java.lang.String capability)
void	unbuffer()

Methods inherited from class alluxio.hadoop.BaseHdfsFileInputStream

available, close, getPos, read, read, read, read, read, readFully, readFully, seek, seekToNewSource, skip

Methods inherited from class java.io.InputStream

mark, markSupported, reset

Methods inherited from class java.lang.Object

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

Constructor Detail

HdfsFileInputStream

public HdfsFileInputStream(FileSystem fs,
                           AlluxioURI uri,
                           org.apache.hadoop.fs.FileSystem.Statistics stats)
                    throws java.io.IOException

Constructs a new stream for reading a file from HDFS.

Parameters:

fs - the file system

uri - the Alluxio file URI

stats - filesystem statistics

Throws:

java.io.IOException

HdfsFileInputStream

public HdfsFileInputStream(FileInStream inputStream,
                           org.apache.hadoop.fs.FileSystem.Statistics stats)

Constructs a new stream for reading a file from HDFS.

Parameters:

inputStream - the input stream

stats - filesystem statistics

Method Detail

hasCapability

public boolean hasCapability(java.lang.String capability)

Specified by:

hasCapability in interface org.apache.hadoop.fs.StreamCapabilities

unbuffer

public void unbuffer()

Specified by:

unbuffer in interface org.apache.hadoop.fs.CanUnbuffer