com.singlestore.jdbc.client.socket

Class PacketWriter

java.lang.Object

com.singlestore.jdbc.client.socket.PacketWriter

public class PacketWriter
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
protected byte[]	buf
protected com.singlestore.jdbc.util.MutableInt	compressSequence
protected int	pos
protected com.singlestore.jdbc.util.MutableInt	sequence
static int	SMALL_BUFFER_SIZE

Constructor Summary

Constructors

Constructor and Description
PacketWriter(OutputStream out, int maxQuerySizeToLog, com.singlestore.jdbc.util.MutableInt sequence, com.singlestore.jdbc.util.MutableInt compressSequence) Common feature to write data into socket, creating SingleStore Packet.

Method Summary

Modifier and Type	Method and Description
boolean	bufIsDataAfterMark()
void	checkMaxAllowedLength(int length) Count query size.
void	close()
void	flush() Send packet to socket.
void	flushBufferStopAtMark() Flush to last mark.
boolean	hasFlushed()
void	initPacket()
boolean	isMarked()
void	mark()
void	permitTrace(boolean permitTrace)
int	pos()
void	pos(int pos)
byte[]	resetMark() Reset mark flag and send bytes after mark flag.
void	setMaxAllowedPacket(int maxAllowedPacket)
void	setServerThreadId(Long serverThreadId, HostAddress hostAddress) Set server thread id.
void	writeAscii(String str)
void	writeByte(int value) Write byte into buf, flush buf to socket if needed.
void	writeBytes(byte[] arr)
void	writeBytes(byte[] arr, int off, int len) Write byte array to buf.
void	writeBytesAtPos(byte[] arr, int pos)
void	writeBytesEscaped(byte[] bytes, int len, boolean noBackslashEscapes) Write escape bytes to socket.
void	writeDouble(double value)
void	writeEmptyPacket() Send empty packet.
void	writeFloat(float value)
void	writeInt(int value) Write int value into buf.
void	writeLength(long length) Write field length into buf, flush socket if needed.
void	writeLong(long value) Write long value into buf.
void	writeShort(short value) Write short value into buf.
protected void	writeSocket(boolean commandEnd) Flush the internal buf.
void	writeString(String str)
void	writeStringEscaped(String str, boolean noBackslashEscapes) Write string to socket.

Methods inherited from class java.lang.Object

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

Field Detail

SMALL_BUFFER_SIZE

public static final int SMALL_BUFFER_SIZE

See Also:

Constant Field Values

sequence

protected final com.singlestore.jdbc.util.MutableInt sequence

compressSequence

protected final com.singlestore.jdbc.util.MutableInt compressSequence

buf

protected byte[] buf

pos

protected int pos

Constructor Detail

PacketWriter

public PacketWriter(OutputStream out,
                    int maxQuerySizeToLog,
                    com.singlestore.jdbc.util.MutableInt sequence,
                    com.singlestore.jdbc.util.MutableInt compressSequence)

Common feature to write data into socket, creating SingleStore Packet.

Parameters:

out - output stream

maxQuerySizeToLog - maximum query size to log

sequence - packet sequence

compressSequence - compressed packet sequence

Method Detail

pos

public int pos()

pos

public void pos(int pos)
         throws IOException

Throws:

IOException

writeByte

public void writeByte(int value)
               throws IOException

Write byte into buf, flush buf to socket if needed.

Parameters:

value - byte to send

Throws:

IOException - if socket error occur.

writeShort

public void writeShort(short value)
                throws IOException

Write short value into buf. flush buf if too small.

Parameters:

value - short value

Throws:

IOException - if socket error occur

writeInt

public void writeInt(int value)
              throws IOException

Write int value into buf. flush buf if too small.

Parameters:

value - int value

Throws:

IOException - if socket error occur

writeLong

public void writeLong(long value)
               throws IOException

Write long value into buf. flush buf if too small.

Parameters:

value - long value

Throws:

IOException - if socket error occur

writeDouble

public void writeDouble(double value)
                 throws IOException

Throws:

IOException

writeFloat

public void writeFloat(float value)
                throws IOException

Throws:

IOException

writeBytes

public void writeBytes(byte[] arr)
                throws IOException

Throws:

IOException

writeBytesAtPos

public void writeBytesAtPos(byte[] arr,
                            int pos)

writeBytes

public void writeBytes(byte[] arr,
                       int off,
                       int len)
                throws IOException

Write byte array to buf. If buf is full, flush socket.

Parameters:

arr - byte array

off - offset

len - byte length to write

Throws:

IOException - if socket error occur

writeLength

public void writeLength(long length)
                 throws IOException

Write field length into buf, flush socket if needed.

Parameters:

length - field length

Throws:

IOException - if socket error occur.

writeAscii

public void writeAscii(String str)
                throws IOException

Throws:

IOException

writeString

public void writeString(String str)
                 throws IOException

Throws:

IOException

writeStringEscaped

public void writeStringEscaped(String str,
                               boolean noBackslashEscapes)
                        throws IOException

Write string to socket.

Parameters:

str - string

noBackslashEscapes - escape method

Throws:

IOException - if socket error occur

writeBytesEscaped

public void writeBytesEscaped(byte[] bytes,
                              int len,
                              boolean noBackslashEscapes)
                       throws IOException

Write escape bytes to socket.

Parameters:

bytes - bytes

len - len to write

noBackslashEscapes - escape method

Throws:

IOException - if socket error occur

writeEmptyPacket

public void writeEmptyPacket()
                      throws IOException

Send empty packet.

Throws:

IOException - if socket error occur.

flush

public void flush()
           throws IOException

Send packet to socket.

Throws:

IOException - if socket error occur.

checkMaxAllowedLength

public void checkMaxAllowedLength(int length)
                           throws MaxAllowedPacketException

Count query size. If query size is greater than max_allowed_packet and nothing has been already send, throw an exception to avoid having the connection closed.

Parameters:

length - additional length to query size

Throws:

MaxAllowedPacketException - if query has not to be send.

setMaxAllowedPacket

public void setMaxAllowedPacket(int maxAllowedPacket)

permitTrace

public void permitTrace(boolean permitTrace)

setServerThreadId

public void setServerThreadId(Long serverThreadId,
                              HostAddress hostAddress)

Set server thread id.

Parameters:

serverThreadId - current server thread id.

hostAddress - host information

mark

public void mark()

isMarked

public boolean isMarked()

hasFlushed

public boolean hasFlushed()

flushBufferStopAtMark

public void flushBufferStopAtMark()
                           throws IOException

Flush to last mark.

Throws:

IOException - if flush fail.

bufIsDataAfterMark

public boolean bufIsDataAfterMark()

resetMark

public byte[] resetMark()

Reset mark flag and send bytes after mark flag.

Returns:

bytes after mark flag

initPacket

public void initPacket()

writeSocket

protected void writeSocket(boolean commandEnd)
                    throws IOException

Flush the internal buf.

Parameters:

commandEnd - command end

Throws:

IOException - id connection error occur.

close

public void close()
           throws IOException

Throws:

IOException