io.debezium.connector.postgresql.connection

Class AbstractMessageDecoder

java.lang.Object

io.debezium.connector.postgresql.connection.AbstractMessageDecoder

All Implemented Interfaces:

MessageDecoder

Direct Known Subclasses:

NonStreamingWal2JsonMessageDecoder, PgOutputMessageDecoder, PgProtoMessageDecoder, StreamingWal2JsonMessageDecoder

public abstract class AbstractMessageDecoder
extends Object
implements MessageDecoder

Abstract implementation of MessageDecoder that all decoders should inherit from.

Author:

Chris Cranford

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	filterBasedOnLsn
private static org.slf4j.Logger	LOGGER

Constructor Summary

Constructors

Constructor and Description
AbstractMessageDecoder(MessageDecoderConfig config)

Method Summary

Modifier and Type	Method and Description
void	processMessage(ByteBuffer buffer, ReplicationStream.ReplicationMessageProcessor processor, TypeRegistry typeRegistry) Process a message upon arrival from logical decoder
protected abstract void	processNotEmptyMessage(ByteBuffer buffer, ReplicationStream.ReplicationMessageProcessor processor, TypeRegistry typeRegistry)
boolean	shouldMessageBeSkipped(ByteBuffer buffer, Lsn lastReceivedLsn, Lsn startLsn, WalPositionLocator walPosition) A callback into the decoder allowing it to decide whether the supplied message should be processed by the decoder or whether it can be skipped.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.debezium.connector.postgresql.connection.MessageDecoder

optionsWithMetadata, optionsWithoutMetadata, setContainsMetadata

Field Detail

LOGGER

private static final org.slf4j.Logger LOGGER

filterBasedOnLsn

private final boolean filterBasedOnLsn

Constructor Detail

AbstractMessageDecoder

public AbstractMessageDecoder(MessageDecoderConfig config)

Method Detail

processMessage

public void processMessage(ByteBuffer buffer,
                           ReplicationStream.ReplicationMessageProcessor processor,
                           TypeRegistry typeRegistry)
                    throws SQLException,
                           InterruptedException

Description copied from interface: MessageDecoder

Process a message upon arrival from logical decoder

Specified by:

processMessage in interface MessageDecoder

Parameters:

buffer - - binary representation of replication message

processor - - message processing on arrival

typeRegistry - - registry with known types

Throws:

SQLException

InterruptedException

processNotEmptyMessage

protected abstract void processNotEmptyMessage(ByteBuffer buffer,
                                               ReplicationStream.ReplicationMessageProcessor processor,
                                               TypeRegistry typeRegistry)
                                        throws SQLException,
                                               InterruptedException

Throws:

SQLException

InterruptedException

shouldMessageBeSkipped

public boolean shouldMessageBeSkipped(ByteBuffer buffer,
                                      Lsn lastReceivedLsn,
                                      Lsn startLsn,
                                      WalPositionLocator walPosition)

Description copied from interface: MessageDecoder

A callback into the decoder allowing it to decide whether the supplied message should be processed by the decoder or whether it can be skipped.

Specified by:

shouldMessageBeSkipped in interface MessageDecoder

Parameters:

buffer - the replication stream buffer

lastReceivedLsn - the last LSN reported by the replication stream

startLsn - the starting LSN reported by the streaming producer

walPosition - wal position from which the streaming should resume

Returns:

true if the incoming message should be skipped, false otherwise