io.debezium.connector.oracle.logminer

Class LogMinerQueryResultProcessor

java.lang.Object

io.debezium.connector.oracle.logminer.LogMinerQueryResultProcessor

class LogMinerQueryResultProcessor
extends Object

This class process entries obtained from LogMiner view. It parses each entry. On each DML it registers a callback in TransactionalBuffer. On rollback it removes registered entries from TransactionalBuffer. On commit it executes all registered callbacks, which dispatch ChangeRecords. This also calculates metrics

Field Summary

Fields

Modifier and Type	Field and Description
private String	catalogName
private io.debezium.util.Clock	clock
private io.debezium.pipeline.source.spi.ChangeEventSource.ChangeEventSourceContext	context
private long	currentOffsetCommitScn
private long	currentOffsetScn
private io.debezium.pipeline.EventDispatcher<io.debezium.relational.TableId>	dispatcher
private SimpleDmlParser	dmlParser
private HistoryRecorder	historyRecorder
private org.slf4j.Logger	LOGGER
private LogMinerMetrics	metrics
private OracleOffsetContext	offsetContext
private OracleDatabaseSchema	schema
private long	stuckScnCounter
private TransactionalBuffer	transactionalBuffer
private TransactionalBufferMetrics	transactionalBufferMetrics

Constructor Summary

Constructors

Constructor and Description

LogMinerQueryResultProcessor(io.debezium.pipeline.source.spi.ChangeEventSource.ChangeEventSourceContext context, LogMinerMetrics metrics, TransactionalBuffer transactionalBuffer, SimpleDmlParser dmlParser, OracleOffsetContext offsetContext, OracleDatabaseSchema schema, io.debezium.pipeline.EventDispatcher<io.debezium.relational.TableId> dispatcher, TransactionalBufferMetrics transactionalBufferMetrics, String catalogName, io.debezium.util.Clock clock, HistoryRecorder historyRecorder)

Method Summary

Modifier and Type	Method and Description
(package private) int	processResult(ResultSet resultSet) This method does all the job
private void	warnStuckScn() This method is warning if a long running transaction is discovered and could be abandoned in the future.

Methods inherited from class java.lang.Object

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

Field Detail

context

private final io.debezium.pipeline.source.spi.ChangeEventSource.ChangeEventSourceContext context

metrics

private final LogMinerMetrics metrics

transactionalBuffer

private final TransactionalBuffer transactionalBuffer

dmlParser

private final SimpleDmlParser dmlParser

offsetContext

private final OracleOffsetContext offsetContext

schema

private final OracleDatabaseSchema schema

dispatcher

private final io.debezium.pipeline.EventDispatcher<io.debezium.relational.TableId> dispatcher

transactionalBufferMetrics

private final TransactionalBufferMetrics transactionalBufferMetrics

catalogName

private final String catalogName

clock

private final io.debezium.util.Clock clock

LOGGER

private final org.slf4j.Logger LOGGER

currentOffsetScn

private long currentOffsetScn

currentOffsetCommitScn

private long currentOffsetCommitScn

stuckScnCounter

private long stuckScnCounter

historyRecorder

private HistoryRecorder historyRecorder

Constructor Detail

LogMinerQueryResultProcessor

LogMinerQueryResultProcessor(io.debezium.pipeline.source.spi.ChangeEventSource.ChangeEventSourceContext context,
                             LogMinerMetrics metrics,
                             TransactionalBuffer transactionalBuffer,
                             SimpleDmlParser dmlParser,
                             OracleOffsetContext offsetContext,
                             OracleDatabaseSchema schema,
                             io.debezium.pipeline.EventDispatcher<io.debezium.relational.TableId> dispatcher,
                             TransactionalBufferMetrics transactionalBufferMetrics,
                             String catalogName,
                             io.debezium.util.Clock clock,
                             HistoryRecorder historyRecorder)

Method Detail

processResult

int processResult(ResultSet resultSet)

This method does all the job

Parameters:

resultSet - the info from Log Miner view

Returns:

number of processed DMLs from the given resultSet

warnStuckScn

private void warnStuckScn()

This method is warning if a long running transaction is discovered and could be abandoned in the future. The criteria is the offset SCN remains the same in 25 mining cycles