org.apache.nifi.processors.standard.relp.frame

Class RELPDecoder

java.lang.Object

org.apache.nifi.processors.standard.relp.frame.RELPDecoder

public class RELPDecoder
extends Object

Decodes a RELP frame by maintaining a state based on each byte that has been processed. This class should not be shared by multiple threads.

Field Summary

Fields

Modifier and Type	Field and Description
private Charset	charset
private ByteArrayOutputStream	currBytes
private RELPState	currState
private RELPFrame.Builder	frameBuilder
(package private) static org.slf4j.Logger	logger

Constructor Summary

Constructors

Constructor and Description
RELPDecoder(Charset charset)
RELPDecoder(Charset charset, ByteArrayOutputStream buffer)
RELPDecoder(Charset charset, int bufferSize)

Method Summary

Modifier and Type	Method and Description
RELPFrame	getFrame() Returns the decoded frame and resets the decoder for the next frame.
boolean	process(byte currByte) Process the next byte from the channel, updating the builder and state accordingly.
private void	processCOMMAND(byte b)
private void	processDATA(byte b)
private void	processLENGTH(byte b)
private void	processTRAILER(byte b)
private void	processTXNR(byte b)
void	reset() Resets this decoder back to it's initial state.

Methods inherited from class java.lang.Object

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

Field Detail

logger

static final org.slf4j.Logger logger

frameBuilder

private RELPFrame.Builder frameBuilder

currState

private RELPState currState

charset

private final Charset charset

currBytes

private final ByteArrayOutputStream currBytes

Constructor Detail

RELPDecoder

public RELPDecoder(Charset charset)

Parameters:

charset - the charset to decode bytes from the RELP frame

RELPDecoder

public RELPDecoder(Charset charset,
                   int bufferSize)

Parameters:

charset - the charset to decode bytes from the RELP frame

RELPDecoder

public RELPDecoder(Charset charset,
                   ByteArrayOutputStream buffer)

Parameters:

charset - the charset to decode bytes from the RELP frame

buffer - a buffer to use while processing the bytes

Method Detail

reset

public void reset()

Resets this decoder back to it's initial state.

process

public boolean process(byte currByte)
                throws RELPFrameException

Process the next byte from the channel, updating the builder and state accordingly.

Parameters:

currByte - the next byte to process

Throws:

RELPFrameException

getFrame

public RELPFrame getFrame()
                   throws RELPFrameException

Returns the decoded frame and resets the decoder for the next frame. This method should be called after checking isComplete().

Returns:

the RELPFrame that was decoded

Throws:

RELPFrameException

processTXNR

private void processTXNR(byte b)

processCOMMAND

private void processCOMMAND(byte b)

processLENGTH

private void processLENGTH(byte b)

processDATA

private void processDATA(byte b)

processTRAILER

private void processTRAILER(byte b)