Package org.mariadb.jdbc.client.socket.impl

Class ReadAheadBufferedStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

org.mariadb.jdbc.client.socket.impl.ReadAheadBufferedStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class ReadAheadBufferedStream
extends FilterInputStream

Permit to buf socket data, reading not only asked bytes, but available number of bytes when possible.

Field Summary

Fields

Modifier and Type	Field	Description
private final byte[]	buf
private static final int	BUF_SIZE
private int	end
private int	pos

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor	Description
ReadAheadBufferedStream(InputStream in)	Constructor

Method Summary

Modifier and Type	Method	Description
int	available()
void	close()
private void	fillingBuffer(int minNeededBytes)	Fill buf with required length, or available bytes.
boolean	markSupported()
int	read()
int	read(byte[] externalBuf, int off, int len)	Returning byte array, from cache of reading socket if needed.
void	reset()
long	skip(long n)

Methods inherited from class java.io.FilterInputStream

mark, read

Methods inherited from class java.io.InputStream

nullInputStream, readAllBytes, readNBytes, readNBytes, skipNBytes, transferTo

Methods inherited from class java.lang.Object

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

Field Details

BUF_SIZE

private static final int BUF_SIZE

See Also:

• Constant Field Values

buf

private final byte[] buf

end

private int end

pos

private int pos

Constructor Details

ReadAheadBufferedStream

public ReadAheadBufferedStream(InputStream in)

Constructor

Implementation doesn't use synchronized/semaphore because all used are already locked by Statement/PreparedStatement Reentrant lock

Parameters:

in - socket input stream

Method Details

read

public int read(byte[] externalBuf,
 int off,
 int len)
         throws IOException

Returning byte array, from cache of reading socket if needed.

Overrides:

read in class FilterInputStream

Parameters:

externalBuf - buf to fill

off - offset

len - length to read

Returns:

number of added bytes

Throws:

IOException - if exception during socket reading

fillingBuffer

private void fillingBuffer(int minNeededBytes)
                    throws IOException

Fill buf with required length, or available bytes.

Parameters:

minNeededBytes - asked number of bytes

Throws:

IOException - in case of failing reading stream.

markSupported

public boolean markSupported()

Overrides:

markSupported in class FilterInputStream

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class FilterInputStream

Throws:

IOException

available

public int available()
              throws IOException

Overrides:

available in class FilterInputStream

Throws:

IOException

read

public int read()
         throws IOException

Overrides:

read in class FilterInputStream

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class FilterInputStream

Throws:

IOException

reset

public void reset()
           throws IOException

Overrides:

reset in class FilterInputStream

Throws:

IOException