org.apache.cassandra.io.util

Class BufferedDataOutputStreamPlus

java.lang.Object

java.io.OutputStream

org.apache.cassandra.io.util.DataOutputStreamPlus

org.apache.cassandra.io.util.BufferedDataOutputStreamPlus

All Implemented Interfaces:

java.io.Closeable, java.io.DataOutput, java.io.Flushable, java.lang.AutoCloseable, DataOutputPlus

Direct Known Subclasses:

DataOutputBuffer, SequentialWriter

public class BufferedDataOutputStreamPlus
extends DataOutputStreamPlus

An implementation of the DataOutputStreamPlus interface using a ByteBuffer to stage writes before flushing them to an underlying channel. This class is completely thread unsafe.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.nio.ByteBuffer	buffer
protected boolean	strictFlushing

Fields inherited from class org.apache.cassandra.io.util.DataOutputStreamPlus

channel

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BufferedDataOutputStreamPlus(java.nio.ByteBuffer buffer)
	BufferedDataOutputStreamPlus(java.io.FileOutputStream fos)
	BufferedDataOutputStreamPlus(java.io.FileOutputStream fos, int bufferSize)
	BufferedDataOutputStreamPlus(java.io.RandomAccessFile ras)
	BufferedDataOutputStreamPlus(java.io.RandomAccessFile ras, int bufferSize)
	BufferedDataOutputStreamPlus(java.nio.channels.WritableByteChannel wbc)
protected	BufferedDataOutputStreamPlus(java.nio.channels.WritableByteChannel channel, java.nio.ByteBuffer buffer)
	BufferedDataOutputStreamPlus(java.nio.channels.WritableByteChannel wbc, int bufferSize)

Method Summary

Modifier and Type	Method and Description
<R> R	applyToChannel(com.google.common.base.Function<java.nio.channels.WritableByteChannel,R> f) Safe way to operate against the underlying channel.
void	close()
protected void	doFlush(int count)
void	flush()
BufferedDataOutputStreamPlus	order(java.nio.ByteOrder order)
void	write(byte[] b)
void	write(byte[] b, int off, int len)
void	write(java.nio.ByteBuffer toWrite)
void	write(int b)
void	write(Memory memory, long offset, long length)
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	writeUnsignedVInt(long value) This is more efficient for storing unsigned values, both in storage and CPU burden.
void	writeUTF(java.lang.String s)
void	writeVInt(long value)

Methods inherited from class org.apache.cassandra.io.util.DataOutputStreamPlus

newDefaultChannel, retrieveTemporaryBuffer

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.io.util.DataOutputPlus

hasPosition, position

Field Detail

buffer

protected java.nio.ByteBuffer buffer

strictFlushing

protected boolean strictFlushing

Constructor Detail

BufferedDataOutputStreamPlus

public BufferedDataOutputStreamPlus(java.io.RandomAccessFile ras)

BufferedDataOutputStreamPlus

public BufferedDataOutputStreamPlus(java.io.RandomAccessFile ras,
                                    int bufferSize)

BufferedDataOutputStreamPlus

public BufferedDataOutputStreamPlus(java.io.FileOutputStream fos)

BufferedDataOutputStreamPlus

public BufferedDataOutputStreamPlus(java.io.FileOutputStream fos,
                                    int bufferSize)

BufferedDataOutputStreamPlus

public BufferedDataOutputStreamPlus(java.nio.channels.WritableByteChannel wbc)

BufferedDataOutputStreamPlus

public BufferedDataOutputStreamPlus(java.nio.channels.WritableByteChannel wbc,
                                    int bufferSize)

BufferedDataOutputStreamPlus

protected BufferedDataOutputStreamPlus(java.nio.channels.WritableByteChannel channel,
                                       java.nio.ByteBuffer buffer)

BufferedDataOutputStreamPlus

protected BufferedDataOutputStreamPlus(java.nio.ByteBuffer buffer)

Method Detail

write

public void write(byte[] b)
           throws java.io.IOException

Specified by:

write in interface java.io.DataOutput

Overrides:

write in class java.io.OutputStream

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

write

public void write(java.nio.ByteBuffer toWrite)
           throws java.io.IOException

Throws:

java.io.IOException

write

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

Specified by:

write in interface java.io.DataOutput

Specified by:

write in class java.io.OutputStream

Throws:

java.io.IOException

writeBoolean

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

Throws:

java.io.IOException

writeByte

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

Throws:

java.io.IOException

writeShort

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

Throws:

java.io.IOException

writeChar

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

Throws:

java.io.IOException

writeInt

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

Throws:

java.io.IOException

writeLong

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

Throws:

java.io.IOException

writeVInt

public void writeVInt(long value)
               throws java.io.IOException

Throws:

java.io.IOException

writeUnsignedVInt

public void writeUnsignedVInt(long value)
                       throws java.io.IOException

Description copied from interface: DataOutputPlus

This is more efficient for storing unsigned values, both in storage and CPU burden. Note that it is still possible to store negative values, they just take up more space. So this method doesn't forbid e.g. negative sentinel values in future, if they need to be snuck in. A protocol version bump can then be introduced to improve efficiency.

Throws:

java.io.IOException

writeFloat

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

Throws:

java.io.IOException

writeDouble

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

Throws:

java.io.IOException

writeBytes

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

Throws:

java.io.IOException

writeChars

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

Throws:

java.io.IOException

writeUTF

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

Throws:

java.io.IOException

write

public void write(Memory memory,
                  long offset,
                  long length)
           throws java.io.IOException

Throws:

java.io.IOException

doFlush

@DontInline
protected void doFlush(int count)
                            throws java.io.IOException

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.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.OutputStream

Throws:

java.io.IOException

applyToChannel

public <R> R applyToChannel(com.google.common.base.Function<java.nio.channels.WritableByteChannel,R> f)
                     throws java.io.IOException

Description copied from interface: DataOutputPlus

Safe way to operate against the underlying channel. Impossible to stash a reference to the channel and forget to flush

Throws:

java.io.IOException

order

public BufferedDataOutputStreamPlus order(java.nio.ByteOrder order)