Package io.debezium.connector.oracle

Class BaseChangeRecordEmitter<T>

java.lang.Object

io.debezium.pipeline.AbstractChangeRecordEmitter<P,TableSchema>

io.debezium.relational.RelationalChangeRecordEmitter

io.debezium.connector.oracle.BaseChangeRecordEmitter<T>

All Implemented Interfaces:

ChangeRecordEmitter

Direct Known Subclasses:

LogMinerChangeRecordEmitter, XStreamChangeRecordEmitter

public abstract class BaseChangeRecordEmitter<T>
extends RelationalChangeRecordEmitter

Base class to emit change data based on a single entry event.

Nested Class Summary

Nested classes/interfaces inherited from interface io.debezium.pipeline.spi.ChangeRecordEmitter

ChangeRecordEmitter.Receiver<P extends Partition>

Field Summary

Fields

Modifier and Type	Field	Description
private final OracleConnectorConfig	connectorConfig
private static final org.slf4j.Logger	LOGGER
private final Object[]	newColumnValues
private final Object[]	oldColumnValues
private final OracleDatabaseSchema	schema
protected final Table	table

Fields inherited from class io.debezium.relational.RelationalChangeRecordEmitter

PK_UPDATE_NEWKEY_FIELD, PK_UPDATE_OLDKEY_FIELD

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	BaseChangeRecordEmitter(OracleConnectorConfig connectorConfig, Partition partition, OffsetContext offset, OracleDatabaseSchema schema, Table table, Clock clock, Object[] oldColumnValues, Object[] newColumnValues)

Method Summary

Modifier and Type	Method	Description
protected void	emitTruncateRecord(ChangeRecordEmitter.Receiver receiver, TableSchema tableSchema)
protected void	emitUpdateAsPrimaryKeyChangeRecord(ChangeRecordEmitter.Receiver receiver, TableSchema tableSchema, org.apache.kafka.connect.data.Struct oldKey, org.apache.kafka.connect.data.Struct newKey, org.apache.kafka.connect.data.Struct oldValue, org.apache.kafka.connect.data.Struct newValue)
protected Object[]	getNewColumnValues()
protected Object[]	getOldColumnValues()
private List<Column>	getReselectColumns(org.apache.kafka.connect.data.Struct newValue)	Returns a list of columns that should be reselected.
private String	getReselectQuery(List<Column> reselectColumns, Table table, OracleConnection connection)	Creates the reselect query, a query that explicitly only selects the LOB-based columns from the underlying relational table based on the event's current primary key value set.
private void	prepareReselectQueryStatement(PreparedStatement ps, Table table, org.apache.kafka.connect.data.Struct newKey)	Prepares the reselect query, binding the primary key column values
private void	updateNewValuesFromReselectQueryResults(ResultSet rs, List<Column> reselectColumns)	Applies the reselect query results to the new column values object array.

Methods inherited from class io.debezium.relational.RelationalChangeRecordEmitter

emitChangeRecords, emitCreateRecord, emitDeleteRecord, emitReadRecord, emitUpdateRecord, skipEmptyMessages

Methods inherited from class io.debezium.pipeline.AbstractChangeRecordEmitter

getClock, getOffset, getPartition

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.debezium.pipeline.spi.ChangeRecordEmitter

getOperation

Field Details

LOGGER

private static final org.slf4j.Logger LOGGER

connectorConfig

private final OracleConnectorConfig connectorConfig

oldColumnValues

private final Object[] oldColumnValues

newColumnValues

private final Object[] newColumnValues

schema

private final OracleDatabaseSchema schema

table

protected final Table table

Constructor Details

BaseChangeRecordEmitter

protected BaseChangeRecordEmitter(OracleConnectorConfig connectorConfig,
 Partition partition,
 OffsetContext offset,
 OracleDatabaseSchema schema,
 Table table,
 Clock clock,
 Object[] oldColumnValues,
 Object[] newColumnValues)

Method Details

getOldColumnValues

protected Object[] getOldColumnValues()

Specified by:

getOldColumnValues in class RelationalChangeRecordEmitter

getNewColumnValues

protected Object[] getNewColumnValues()

Specified by:

getNewColumnValues in class RelationalChangeRecordEmitter

emitTruncateRecord

protected void emitTruncateRecord(ChangeRecordEmitter.Receiver receiver,
 TableSchema tableSchema)
                           throws InterruptedException

Overrides:

emitTruncateRecord in class RelationalChangeRecordEmitter

Throws:

InterruptedException

emitUpdateAsPrimaryKeyChangeRecord

protected void emitUpdateAsPrimaryKeyChangeRecord(ChangeRecordEmitter.Receiver receiver,
 TableSchema tableSchema,
 org.apache.kafka.connect.data.Struct oldKey,
 org.apache.kafka.connect.data.Struct newKey,
 org.apache.kafka.connect.data.Struct oldValue,
 org.apache.kafka.connect.data.Struct newValue)
                                           throws InterruptedException

Overrides:

emitUpdateAsPrimaryKeyChangeRecord in class RelationalChangeRecordEmitter

Throws:

InterruptedException

getReselectColumns

private List<Column> getReselectColumns(org.apache.kafka.connect.data.Struct newValue)

Returns a list of columns that should be reselected. Currently, this method is only concerned about LOB-based columns and so if a table does not have any LOB columns or if the LOB column's value is not the unavailable value placeholder configured in the connector configuration, this method may return no columns indicating that a reselection is not required for the change event.

Parameters:

newValue - the currently constructed new value payload for the change event, should not be null

Returns:

list of columns that should be reselected, which can be empty

getReselectQuery

private String getReselectQuery(List<Column> reselectColumns,
 Table table,
 OracleConnection connection)

Creates the reselect query, a query that explicitly only selects the LOB-based columns from the underlying relational table based on the event's current primary key value set.

Parameters:

reselectColumns - the columns that should be reselected, should never be null or empty

table - the relational table model

connection - the database connection

Returns:

the query string for the reselect query

prepareReselectQueryStatement

private void prepareReselectQueryStatement(PreparedStatement ps,
 Table table,
 org.apache.kafka.connect.data.Struct newKey)
                                    throws SQLException

Prepares the reselect query, binding the primary key column values

Parameters:

ps - the prepared statement

table - the relational model table

newKey - the row's new key

Throws:

SQLException - if a database error occurred

updateNewValuesFromReselectQueryResults

private void updateNewValuesFromReselectQueryResults(ResultSet rs,
 List<Column> reselectColumns)
                                              throws SQLException

Applies the reselect query results to the new column values object array.

Parameters:

rs - the reselect query result set

reselectColumns - the columns that were re-selected

Throws:

SQLException - if a database error occurred