org.apache.cassandra.io.util

Class UnbufferedDataOutputStreamPlus

java.lang.Object

java.io.OutputStream

org.apache.cassandra.io.util.DataOutputStreamPlus

org.apache.cassandra.io.util.UnbufferedDataOutputStreamPlus

All Implemented Interfaces:

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

Direct Known Subclasses:

WrappedDataOutputStreamPlus

public abstract class UnbufferedDataOutputStreamPlus
extends DataOutputStreamPlus

Base class for DataOutput implementations that does not have an optimized implementations of Plus methods and does no buffering.

Unlike BufferedDataOutputStreamPlus this is capable of operating as an unbuffered output stream. Currently necessary because SequentialWriter implements its own buffering along with mark/reset/truncate.

Field Summary

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

channel

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	UnbufferedDataOutputStreamPlus()
protected	UnbufferedDataOutputStreamPlus(java.nio.channels.WritableByteChannel channel)

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	write(byte[] buffer) Writes the entire contents of the byte array buffer to this RandomAccessFile starting at the current file pointer.
abstract void	write(byte[] buffer, int offset, int count) Writes count bytes from the byte array buffer starting at offset to this RandomAccessFile starting at the current file pointer..
void	write(java.nio.ByteBuffer buf)
abstract void	write(int oneByte) Writes the specified byte oneByte to this RandomAccessFile starting at the current file pointer.
void	write(Memory memory, long offset, long length)
void	writeBoolean(boolean val) Writes a boolean to this output stream.
void	writeByte(int val) Writes a 8-bit byte to this output stream.
void	writeBytes(java.lang.String str) Writes the low order 8-bit bytes from a String to this output stream.
void	writeChar(int val) Writes the specified 16-bit character to the OutputStream.
void	writeChars(java.lang.String str) Writes the specified 16-bit characters contained in str to the OutputStream.
void	writeDouble(double val) Writes a 64-bit double to this output stream.
void	writeFloat(float val) Writes a 32-bit float to this output stream.
void	writeInt(int val) Writes a 32-bit int to this output stream.
void	writeLong(long val) Writes a 64-bit long to this output stream.
void	writeShort(int val) Writes the specified 16-bit short to the OutputStream.
void	writeUTF(java.lang.String str) Writes the specified String out in UTF format.
static void	writeUTF(java.lang.String str, java.io.DataOutput out) Writes the specified String out in UTF format to the provided DataOutput

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

newDefaultChannel, retrieveTemporaryBuffer

Methods inherited from class java.io.OutputStream

close, flush

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, writeUnsignedVInt, writeVInt

Constructor Detail

UnbufferedDataOutputStreamPlus

protected UnbufferedDataOutputStreamPlus()

UnbufferedDataOutputStreamPlus

protected UnbufferedDataOutputStreamPlus(java.nio.channels.WritableByteChannel channel)

Method Detail

write

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

Writes the entire contents of the byte array buffer to this RandomAccessFile starting at the current file pointer.

Specified by:

write in interface java.io.DataOutput

Overrides:

write in class java.io.OutputStream

Parameters:

buffer - the buffer to be written.

Throws:

java.io.IOException - If an error occurs trying to write to this RandomAccessFile.

write

public abstract void write(byte[] buffer,
                           int offset,
                           int count)
                    throws java.io.IOException

Writes count bytes from the byte array buffer starting at offset to this RandomAccessFile starting at the current file pointer..

Specified by:

write in interface java.io.DataOutput

Overrides:

write in class java.io.OutputStream

Parameters:

buffer - the bytes to be written

offset - offset in buffer to get bytes

count - number of bytes in buffer to write

Throws:

java.io.IOException - If an error occurs attempting to write to this RandomAccessFile.

java.lang.IndexOutOfBoundsException - If offset or count are outside of bounds.

write

public abstract void write(int oneByte)
                    throws java.io.IOException

Writes the specified byte oneByte to this RandomAccessFile starting at the current file pointer. Only the low order byte of oneByte is written.

Specified by:

write in interface java.io.DataOutput

Specified by:

write in class java.io.OutputStream

Parameters:

oneByte - the byte to be written

Throws:

java.io.IOException - If an error occurs attempting to write to this RandomAccessFile.

writeBoolean

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

Writes a boolean to this output stream.

Parameters:

val - the boolean value to write to the OutputStream

Throws:

java.io.IOException - If an error occurs attempting to write to this DataOutputStream.

writeByte

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

Writes a 8-bit byte to this output stream.

Parameters:

val - the byte value to write to the OutputStream

Throws:

java.io.IOException - If an error occurs attempting to write to this DataOutputStream.

writeBytes

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

Writes the low order 8-bit bytes from a String to this output stream.

Parameters:

str - the String containing the bytes to write to the OutputStream

Throws:

java.io.IOException - If an error occurs attempting to write to this DataOutputStream.

writeChar

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

Writes the specified 16-bit character to the OutputStream. Only the lower 2 bytes are written with the higher of the 2 bytes written first. This represents the Unicode value of val.

Parameters:

val - the character to be written

Throws:

java.io.IOException - If an error occurs attempting to write to this DataOutputStream.

writeChars

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

Writes the specified 16-bit characters contained in str to the OutputStream. Only the lower 2 bytes of each character are written with the higher of the 2 bytes written first. This represents the Unicode value of each character in str.

Parameters:

str - the String whose characters are to be written.

Throws:

java.io.IOException - If an error occurs attempting to write to this DataOutputStream.

writeDouble

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

Writes a 64-bit double to this output stream. The resulting output is the 8 bytes resulting from calling Double.doubleToLongBits().

Parameters:

val - the double to be written.

Throws:

java.io.IOException - If an error occurs attempting to write to this DataOutputStream.

writeFloat

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

Writes a 32-bit float to this output stream. The resulting output is the 4 bytes resulting from calling Float.floatToIntBits().

Parameters:

val - the float to be written.

Throws:

java.io.IOException - If an error occurs attempting to write to this DataOutputStream.

writeInt

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

Writes a 32-bit int to this output stream. The resulting output is the 4 bytes, highest order first, of val.

Parameters:

val - the int to be written.

Throws:

java.io.IOException - If an error occurs attempting to write to this DataOutputStream.

writeLong

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

Writes a 64-bit long to this output stream. The resulting output is the 8 bytes, highest order first, of val.

Parameters:

val - the long to be written.

Throws:

java.io.IOException - If an error occurs attempting to write to this DataOutputStream.

writeShort

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

Writes the specified 16-bit short to the OutputStream. Only the lower 2 bytes are written with the higher of the 2 bytes written first.

Parameters:

val - the short to be written

Throws:

java.io.IOException - If an error occurs attempting to write to this DataOutputStream.

writeUTF

public static void writeUTF(java.lang.String str,
                            java.io.DataOutput out)
                     throws java.io.IOException

Writes the specified String out in UTF format to the provided DataOutput

Parameters:

str - the String to be written in UTF format.

out - the DataOutput to write the UTF encoded string to

Throws:

java.io.IOException - If an error occurs attempting to write to this DataOutputStream.

writeUTF

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

Writes the specified String out in UTF format.

Parameters:

str - the String to be written in UTF format.

Throws:

java.io.IOException - If an error occurs attempting to write to this DataOutputStream.

write

public void write(java.nio.ByteBuffer buf)
           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

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