Package io.debezium.processors.reselect

Class ReselectColumnsPostProcessor

java.lang.Object

io.debezium.processors.reselect.ReselectColumnsPostProcessor

All Implemented Interfaces:

BeanRegistryAware, PostProcessor, AutoCloseable

@Incubating
public class ReselectColumnsPostProcessor
extends Object
implements PostProcessor, BeanRegistryAware

An implementation of the Debezium PostProcessor contract that allows for the re-selection of columns that are populated with the unavailable value placeholder or that the user wishes to have re-queried with the latest state if the column's value happens to be null.

Author:

Chris Cranford

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	ReselectColumnsPostProcessor.ReselectColumnsPredicateBuilder

Field Summary

Fields

Modifier and Type	Field	Description
private RelationalDatabaseConnectorConfig	connectorConfig
private JdbcConnection	jdbcConnection
private static final org.slf4j.Logger	LOGGER
private static final String	RESELECT_COLUMNS_EXCLUDE_LIST
private static final String	RESELECT_COLUMNS_INCLUDE_LIST
private static final String	RESELECT_NULL_VALUES
private static final String	RESELECT_UNAVAILABLE_VALUES
private static final String	RESELECT_USE_EVENT_KEY
private boolean	reselectNullValues
private boolean	reselectUnavailableValues
private boolean	reselectUseEventKeyFields
private RelationalDatabaseSchema	schema
private Predicate<String>	selector
private String	unavailableValuePlaceholder
private ByteBuffer	unavailableValuePlaceholderBytes
private String	unavailableValuePlaceholderJson
private Map<String,String>	unavailableValuePlaceholderMap
private ValueConverterProvider	valueConverterProvider

Constructor Summary

Constructors

Constructor	Description
ReselectColumnsPostProcessor()

Method Summary

Modifier and Type	Method	Description
void	apply(Object messageKey, org.apache.kafka.connect.data.Struct value)	Apply the post processor to the supplied key and value.
void	close()	Close any resources
void	configure(Map<String,?> properties)	Configure the post processor.
private Object	getConvertedValue(Column column, org.apache.kafka.connect.data.Field field, Object value)
private List<String>	getRequiredColumnSelections(TableId tableId, org.apache.kafka.connect.data.Struct after)
private TableId	getTableIdFromSource(org.apache.kafka.connect.data.Struct source)
void	injectBeanRegistry(BeanRegistry beanRegistry)	Callback to inject the bean registry.
private boolean	isUnavailableValueHolder(org.apache.kafka.connect.data.Field field, Object value)
private boolean	isUnavailableValueHolder(org.apache.kafka.connect.data.Schema schema, Object value)

Methods inherited from class java.lang.Object

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

Field Details

LOGGER

private static final org.slf4j.Logger LOGGER

RESELECT_COLUMNS_INCLUDE_LIST

private static final String RESELECT_COLUMNS_INCLUDE_LIST

See Also:

• Constant Field Values

RESELECT_COLUMNS_EXCLUDE_LIST

private static final String RESELECT_COLUMNS_EXCLUDE_LIST

See Also:

• Constant Field Values

RESELECT_UNAVAILABLE_VALUES

private static final String RESELECT_UNAVAILABLE_VALUES

See Also:

• Constant Field Values

RESELECT_NULL_VALUES

private static final String RESELECT_NULL_VALUES

See Also:

• Constant Field Values

RESELECT_USE_EVENT_KEY

private static final String RESELECT_USE_EVENT_KEY

See Also:

• Constant Field Values

selector

private Predicate<String> selector

reselectUnavailableValues

private boolean reselectUnavailableValues

reselectNullValues

private boolean reselectNullValues

reselectUseEventKeyFields

private boolean reselectUseEventKeyFields

jdbcConnection

private JdbcConnection jdbcConnection

valueConverterProvider

private ValueConverterProvider valueConverterProvider

unavailableValuePlaceholder

private String unavailableValuePlaceholder

unavailableValuePlaceholderBytes

private ByteBuffer unavailableValuePlaceholderBytes

unavailableValuePlaceholderMap

private Map<String,String> unavailableValuePlaceholderMap

unavailableValuePlaceholderJson

private String unavailableValuePlaceholderJson

schema

private RelationalDatabaseSchema schema

connectorConfig

private RelationalDatabaseConnectorConfig connectorConfig

Constructor Details

ReselectColumnsPostProcessor

public ReselectColumnsPostProcessor()

Method Details

configure

public void configure(Map<String,?> properties)

Description copied from interface: PostProcessor

Configure the post processor.

Specified by:

configure in interface PostProcessor

Parameters:

properties - map of configurable properties

close

public void close()

Description copied from interface: PostProcessor

Close any resources

Specified by:

close in interface AutoCloseable

Specified by:

close in interface PostProcessor

apply

public void apply(Object messageKey,
 org.apache.kafka.connect.data.Struct value)

Description copied from interface: PostProcessor

Apply the post processor to the supplied key and value.

Specified by:

apply in interface PostProcessor

Parameters:

messageKey - the event's key, may be null

value - the event's value, may be null

injectBeanRegistry

public void injectBeanRegistry(BeanRegistry beanRegistry)

Description copied from interface: BeanRegistryAware

Callback to inject the bean registry.

Specified by:

injectBeanRegistry in interface BeanRegistryAware

Parameters:

beanRegistry - the bean registry

getRequiredColumnSelections

private List<String> getRequiredColumnSelections(TableId tableId,
 org.apache.kafka.connect.data.Struct after)

isUnavailableValueHolder

private boolean isUnavailableValueHolder(org.apache.kafka.connect.data.Field field,
 Object value)

isUnavailableValueHolder

private boolean isUnavailableValueHolder(org.apache.kafka.connect.data.Schema schema,
 Object value)

getConvertedValue

private Object getConvertedValue(Column column,
 org.apache.kafka.connect.data.Field field,
 Object value)

getTableIdFromSource

private TableId getTableIdFromSource(org.apache.kafka.connect.data.Struct source)