Package io.debezium.connector.oracle.logminer

Class LogMinerHelper

java.lang.Object

io.debezium.connector.oracle.logminer.LogMinerHelper

public class LogMinerHelper
extends Object

This class contains methods to configure and manage LogMiner utility

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	CURRENT
private static final org.slf4j.Logger	LOGGER

Constructor Summary

Constructors

Constructor	Description
LogMinerHelper()

Method Summary

Modifier and Type	Method	Description
private static void	executeCallableStatement(OracleConnection connection, String statement)
static int	getColumnIndexByName(String columnName, Table table)	Returns a 0-based index offset for the column name in the relational table.
static List<LogFile>	getLogFilesForOffsetScn(OracleConnection connection, Scn offsetScn, Duration archiveLogRetention, boolean archiveLogOnlyMode, String archiveDestinationName)	Get all log files that should be mined.
private static Scn	getMinimumScn(List<LogFile> logs)
private static Scn	getScnFromString(String value)
private static boolean	hasLogFilesStartingBeforeOrAtScn(List<LogFile> logs, Scn scn)
(package private) static void	logError(OracleStreamingChangeEventSourceMetrics streamingMetrics, String format, Object... args)
(package private) static void	logWarn(OracleStreamingChangeEventSourceMetrics streamingMetrics, String format, Object... args)
static void	removeLogFilesFromMining(OracleConnection conn)	This method removes all added log files from mining
static List<LogFile>	setLogFilesForMining(OracleConnection connection, Scn lastProcessedScn, Duration archiveLogRetention, boolean archiveLogOnlyMode, String archiveDestinationName, int maxRetries, Duration initialDelay, Duration maxDelay)	This method substitutes CONTINUOUS_MINE functionality

Methods inherited from class java.lang.Object

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

Field Details

CURRENT

private static final String CURRENT

See Also:

• Constant Field Values

LOGGER

private static final org.slf4j.Logger LOGGER

Constructor Details

LogMinerHelper

public LogMinerHelper()

Method Details

setLogFilesForMining

public static List<LogFile> setLogFilesForMining(OracleConnection connection,
 Scn lastProcessedScn,
 Duration archiveLogRetention,
 boolean archiveLogOnlyMode,
 String archiveDestinationName,
 int maxRetries,
 Duration initialDelay,
 Duration maxDelay)
                                          throws SQLException

This method substitutes CONTINUOUS_MINE functionality

Parameters:

connection - connection

lastProcessedScn - current offset

archiveLogRetention - the duration that archive logs will be mined

archiveLogOnlyMode - true to mine only archive lgos, false to mine all available logs

archiveDestinationName - configured archive log destination name to use, may be null

maxRetries - the number of retry attempts before giving up and throwing an exception about log state

initialDelay - the initial delay

maxDelay - the maximum delay

Returns:

log files that were added to the current mining session

Throws:

SQLException - if anything unexpected happens

hasLogFilesStartingBeforeOrAtScn

private static boolean hasLogFilesStartingBeforeOrAtScn(List<LogFile> logs,
 Scn scn)

getMinimumScn

private static Scn getMinimumScn(List<LogFile> logs)

logWarn

static void logWarn(OracleStreamingChangeEventSourceMetrics streamingMetrics,
 String format,
 Object... args)

logError

static void logError(OracleStreamingChangeEventSourceMetrics streamingMetrics,
 String format,
 Object... args)

getLogFilesForOffsetScn

public static List<LogFile> getLogFilesForOffsetScn(OracleConnection connection,
 Scn offsetScn,
 Duration archiveLogRetention,
 boolean archiveLogOnlyMode,
 String archiveDestinationName)
                                             throws SQLException

Get all log files that should be mined.

Parameters:

connection - database connection

offsetScn - offset system change number

archiveLogRetention - duration that archive logs should be mined

archiveLogOnlyMode - true to mine only archive logs, false to mine all available logs

archiveDestinationName - archive destination to use, may be null

Returns:

list of log files

Throws:

SQLException - if a database exception occurs

getScnFromString

private static Scn getScnFromString(String value)

removeLogFilesFromMining

public static void removeLogFilesFromMining(OracleConnection conn)
                                     throws SQLException

This method removes all added log files from mining

Parameters:

conn - connection

Throws:

SQLException - something happened

executeCallableStatement

private static void executeCallableStatement(OracleConnection connection,
 String statement)
                                      throws SQLException

Throws:

SQLException

getColumnIndexByName

public static int getColumnIndexByName(String columnName,
 Table table)

Returns a 0-based index offset for the column name in the relational table.

Parameters:

columnName - the column name, should not be null.

table - the relational table, should not be null.

Returns:

the 0-based index offset for the column name