Package org.apache.hadoop.hdfs.server.datanode.fsdataset

Class ReplicaInputStreams

java.lang.Object

org.apache.hadoop.hdfs.server.datanode.fsdataset.ReplicaInputStreams

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class ReplicaInputStreams
extends java.lang.Object
implements java.io.Closeable

Contains the input streams for the data and checksum of a replica.

Field Summary

Fields

Modifier and Type	Field	Description
static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor	Description
ReplicaInputStreams(java.io.InputStream dataStream, java.io.InputStream checksumStream, FsVolumeReference volumeRef, FileIoProvider fileIoProvider)	Create an object with a data input stream and a checksum input stream.

Method Summary

Modifier and Type	Method	Description
void	close()
void	closeChecksumStream()
void	closeStreams()
void	dropCacheBehindReads(java.lang.String identifier, long offset, long len, int flags)
java.io.InputStream	getChecksumIn()
java.io.InputStream	getDataIn()
java.io.FileDescriptor	getDataInFd()
FsVolumeReference	getVolumeRef()
void	readChecksumFully(byte[] buf, int off, int len)
void	readDataFully(byte[] buf, int off, int len)
void	skipChecksumFully(long len)
void	skipDataFully(long len)

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

ReplicaInputStreams

public ReplicaInputStreams(java.io.InputStream dataStream,
                           java.io.InputStream checksumStream,
                           FsVolumeReference volumeRef,
                           FileIoProvider fileIoProvider)

Create an object with a data input stream and a checksum input stream.

Method Detail

getDataIn

public java.io.InputStream getDataIn()

Returns:

the data input stream.

getChecksumIn

public java.io.InputStream getChecksumIn()

Returns:

the checksum input stream.

getDataInFd

public java.io.FileDescriptor getDataInFd()

getVolumeRef

public FsVolumeReference getVolumeRef()

readDataFully

public void readDataFully(byte[] buf,
                          int off,
                          int len)
                   throws java.io.IOException

Throws:

java.io.IOException

readChecksumFully

public void readChecksumFully(byte[] buf,
                              int off,
                              int len)
                       throws java.io.IOException

Throws:

java.io.IOException

skipDataFully

public void skipDataFully(long len)
                   throws java.io.IOException

Throws:

java.io.IOException

skipChecksumFully

public void skipChecksumFully(long len)
                       throws java.io.IOException

Throws:

java.io.IOException

closeChecksumStream

public void closeChecksumStream()
                         throws java.io.IOException

Throws:

java.io.IOException

dropCacheBehindReads

public void dropCacheBehindReads(java.lang.String identifier,
                                 long offset,
                                 long len,
                                 int flags)
                          throws org.apache.hadoop.io.nativeio.NativeIOException

Throws:

org.apache.hadoop.io.nativeio.NativeIOException

closeStreams

public void closeStreams()
                  throws java.io.IOException

Throws:

java.io.IOException

close

public void close()

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable