alluxio.client.file

Class DoraFileOutStream

java.lang.Object

java.io.OutputStream

alluxio.client.file.FileOutStream

alluxio.client.file.DoraFileOutStream

All Implemented Interfaces:

Cancelable, Closeable, Flushable, AutoCloseable

@NotThreadSafe
public class DoraFileOutStream
extends FileOutStream

Provides a streaming API to write a file. This class wraps the BlockOutStreams for each of the blocks in the file and abstracts the switching between streams. The backing streams can write to Alluxio space in the local machine or remote machines. If the UnderStorageType is UnderStorageType.SYNC_PERSIST, another stream will write the data to the under storage system.

Field Summary

Fields

Modifier and Type	Field and Description
protected AlluxioURI	mUri

Fields inherited from class alluxio.client.file.FileOutStream

mBytesWritten

Constructor Summary

Constructors

Constructor and Description
DoraFileOutStream(DoraCacheClient doraClient, NettyDataWriter dataWriter, AlluxioURI path, OutStreamOptions options, FileSystemContext context, FileOutStream ufsOutStream, String uuid) Creates a new file output stream.

Method Summary

Modifier and Type	Method and Description
void	cancel() Aborts the output stream.
void	close()
void	flush()
void	write(byte[] b)
void	write(byte[] b, int off, int len)
void	write(int b)

Methods inherited from class alluxio.client.file.FileOutStream

getBytesWritten

Methods inherited from class java.lang.Object

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

Field Detail

mUri

protected final AlluxioURI mUri

Constructor Detail

DoraFileOutStream

public DoraFileOutStream(DoraCacheClient doraClient,
                         NettyDataWriter dataWriter,
                         AlluxioURI path,
                         OutStreamOptions options,
                         FileSystemContext context,
                         @Nullable
                         FileOutStream ufsOutStream,
                         String uuid)
                  throws IOException

Creates a new file output stream.

Parameters:

doraClient - the dora client for requesting dora worker

dataWriter - the netty data writer which is used for transferring data with netty

path - the file path

options - the client options

context - the file system context

ufsOutStream - the UfsOutStream for writing data to UFS

uuid - the UUID of a certain OutStream

Throws:

IOException

Method Detail

cancel

public void cancel()
            throws IOException

Description copied from class: FileOutStream

Aborts the output stream.

Specified by:

cancel in interface Cancelable

Overrides:

cancel in class FileOutStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class OutputStream

Throws:

IOException

flush

public void flush()
           throws IOException

Specified by:

flush in interface Flushable

Overrides:

flush in class OutputStream

Throws:

IOException

write

public void write(int b)
           throws IOException

Specified by:

write in class OutputStream

Throws:

IOException

write

public void write(byte[] b)
           throws IOException

Overrides:

write in class OutputStream

Throws:

IOException

write

public void write(byte[] b,
                  int off,
                  int len)
           throws IOException

Overrides:

write in class OutputStream

Throws:

IOException