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:

java.io.Closeable, java.io.DataOutput, java.io.Flushable, java.lang.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)
void	writeBoolean(boolean v)
void	writeByte(int v)
void	writeBytes(java.lang.String s)
void	writeChar(int v)
void	writeChars(java.lang.String s)
void	writeDouble(double v)
void	writeFloat(float v)
void	writeInt(int v)
void	writeLong(long v)
void	writeShort(int v)
void	writeUTF(java.lang.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 Detail

ByteBufferDataWriter

public ByteBufferDataWriter(NativeDataTarget handler)

Method Detail

write

public void write(int v)
           throws java.io.IOException

Specified by:

write in interface java.io.DataOutput

Specified by:

write in class java.io.OutputStream

Throws:

java.io.IOException

shortOfSpace

public boolean shortOfSpace(int dataLength)
                     throws java.io.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:

java.io.IOException

write

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

Specified by:

write in interface java.io.DataOutput

Overrides:

write in class java.io.OutputStream

Throws:

java.io.IOException

flush

public void flush()
           throws java.io.IOException

Specified by:

flush in interface java.io.Flushable

Overrides:

flush in class java.io.OutputStream

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable

Overrides:

close in class java.io.OutputStream

Throws:

java.io.IOException

writeBoolean

public final void writeBoolean(boolean v)
                        throws java.io.IOException

Throws:

java.io.IOException

writeByte

public final void writeByte(int v)
                     throws java.io.IOException

Throws:

java.io.IOException

writeShort

public final void writeShort(int v)
                      throws java.io.IOException

Throws:

java.io.IOException

writeChar

public final void writeChar(int v)
                     throws java.io.IOException

Throws:

java.io.IOException

writeInt

public final void writeInt(int v)
                    throws java.io.IOException

Throws:

java.io.IOException

writeLong

public final void writeLong(long v)
                     throws java.io.IOException

Throws:

java.io.IOException

writeFloat

public final void writeFloat(float v)
                      throws java.io.IOException

Throws:

java.io.IOException

writeDouble

public final void writeDouble(double v)
                       throws java.io.IOException

Throws:

java.io.IOException

writeBytes

public final void writeBytes(java.lang.String s)
                      throws java.io.IOException

Throws:

java.io.IOException

writeChars

public final void writeChars(java.lang.String s)
                      throws java.io.IOException

Throws:

java.io.IOException

writeUTF

public final void writeUTF(java.lang.String str)
                    throws java.io.IOException

Throws:

java.io.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