Package org.apache.hadoop.mapred.nativetask.buffer

Class ByteBufferDataWriter

java.lang.Object

java.io.OutputStream

org.apache.hadoop.mapred.nativetask.buffer.DataOutputStream

org.apache.hadoop.mapred.nativetask.buffer.ByteBufferDataWriter

All Implemented Interfaces:

Closeable, DataOutput, Flushable, AutoCloseable

@Private
public class ByteBufferDataWriter
extends DataOutputStream

DataOutputStream implementation which buffers data in a fixed-size ByteBuffer. When the byte buffer has filled up, synchronously passes the buffer to a downstream NativeDataTarget.

Constructor Summary

Constructors

Constructor	Description
ByteBufferDataWriter(NativeDataTarget handler)

Method Summary

Modifier and Type	Method	Description
void	close()
void	flush()
boolean	hasUnFlushedData()	Check whether there is unflushed data stored in the stream
boolean	shortOfSpace(int dataLength)	Check whether this buffer has enough space to store length of bytes
void	write(byte[] b, int off, int len)
void	write(int v)
final void	writeBoolean(boolean v)
final void	writeByte(int v)
final void	writeBytes(String s)
final void	writeChar(int v)
final void	writeChars(String s)
final void	writeDouble(double v)
final void	writeFloat(float v)
final void	writeInt(int v)
final void	writeLong(long v)
final void	writeShort(int v)
final void	writeUTF(String str)

Methods inherited from class java.io.OutputStream

nullOutputStream, write

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.DataOutput

write

Constructor Details

ByteBufferDataWriter

public ByteBufferDataWriter(NativeDataTarget handler)

Method Details

write

public void write(int v)
           throws IOException

Specified by:

write in interface DataOutput

Specified by:

write in class OutputStream

Throws:

IOException

shortOfSpace

public boolean shortOfSpace(int dataLength)
                     throws IOException

Description copied from class: DataOutputStream

Check whether this buffer has enough space to store length of bytes

Specified by:

shortOfSpace in class DataOutputStream

Parameters:

dataLength - length of bytes

Throws:

IOException

write

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

Specified by:

write in interface DataOutput

Overrides:

write in class OutputStream

Throws:

IOException

flush

public void flush()
           throws IOException

Specified by:

flush in interface Flushable

Overrides:

flush in class OutputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class OutputStream

Throws:

IOException

writeBoolean

public final void writeBoolean(boolean v)
                        throws IOException

Throws:

IOException

writeByte

public final void writeByte(int v)
                     throws IOException

Throws:

IOException

writeShort

public final void writeShort(int v)
                      throws IOException

Throws:

IOException

writeChar

public final void writeChar(int v)
                     throws IOException

Throws:

IOException

writeInt

public final void writeInt(int v)
                    throws IOException

Throws:

IOException

writeLong

public final void writeLong(long v)
                     throws IOException

Throws:

IOException

writeFloat

public final void writeFloat(float v)
                      throws IOException

Throws:

IOException

writeDouble

public final void writeDouble(double v)
                       throws IOException

Throws:

IOException

writeBytes

public final void writeBytes(String s)
                      throws IOException

Throws:

IOException

writeChars

public final void writeChars(String s)
                      throws IOException

Throws:

IOException

writeUTF

public final void writeUTF(String str)
                    throws IOException

Throws:

IOException

hasUnFlushedData

public boolean hasUnFlushedData()

Description copied from class: DataOutputStream

Check whether there is unflushed data stored in the stream

Specified by:

hasUnFlushedData in class DataOutputStream