Package io.debezium.connector.postgresql.connection.wal2json

Class Wal2JsonReplicationMessage

java.lang.Object

io.debezium.connector.postgresql.connection.wal2json.Wal2JsonReplicationMessage

All Implemented Interfaces:

ReplicationMessage

class Wal2JsonReplicationMessage
extends Object
implements ReplicationMessage

Replication message representing message sent by the wal2json logical decoding plug-in.

Author:

Jiri Pechanec

Nested Class Summary

Nested classes/interfaces inherited from interface io.debezium.connector.postgresql.connection.ReplicationMessage

ReplicationMessage.Column, ReplicationMessage.ColumnTypeMetadata, ReplicationMessage.ColumnValue<T>, ReplicationMessage.NoopMessage, ReplicationMessage.Operation

Field Summary

Fields

Modifier and Type	Field	Description
private final Instant	commitTime
private final boolean	hasMetadata
private final boolean	lastEventForLsn
private static final org.slf4j.Logger	LOGGER
private final Document	rawMessage
private final Long	txId
private final TypeRegistry	typeRegistry

Constructor Summary

Constructors

Constructor	Description
Wal2JsonReplicationMessage(Long txId, Instant commitTime, Document rawMessage, boolean hasMetadata, boolean lastEventForLsn, TypeRegistry typeRegistry)

Method Summary

Modifier and Type	Method	Description
Instant	getCommitTime()
List<ReplicationMessage.Column>	getNewTupleList()
List<ReplicationMessage.Column>	getOldTupleList()
ReplicationMessage.Operation	getOperation()
String	getTable()
OptionalLong	getTransactionId()
Object	getValue(String columnName, PostgresType type, String fullType, Value rawValue, PostgresStreamingChangeEventSource.PgConnectionSupplier connection, boolean includeUnknownDatatypes)	Converts the value (string representation) coming from wal2json plugin to a Java value based on the type of the column from the message.
boolean	hasTypeMetadata()
boolean	isLastEventForLsn()
private String	parseType(String columnName, String typeWithModifiers)
private List<ReplicationMessage.Column>	transform(Document data, String nameField, String typeField, String valueField, String optionalsField)

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.ReplicationMessage

isTransactionalMessage, shouldSchemaBeSynchronized

Field Details

LOGGER

private static final org.slf4j.Logger LOGGER

txId

private final Long txId

commitTime

private final Instant commitTime

rawMessage

private final Document rawMessage

hasMetadata

private final boolean hasMetadata

lastEventForLsn

private final boolean lastEventForLsn

typeRegistry

private final TypeRegistry typeRegistry

Constructor Details

Wal2JsonReplicationMessage

public Wal2JsonReplicationMessage(Long txId,
 Instant commitTime,
 Document rawMessage,
 boolean hasMetadata,
 boolean lastEventForLsn,
 TypeRegistry typeRegistry)

Method Details

getOperation

public ReplicationMessage.Operation getOperation()

Specified by:

getOperation in interface ReplicationMessage

Returns:

A data operation executed

getCommitTime

public Instant getCommitTime()

Specified by:

getCommitTime in interface ReplicationMessage

Returns:

Transaction commit time for this change

getTransactionId

public OptionalLong getTransactionId()

Specified by:

getTransactionId in interface ReplicationMessage

Returns:

An id of transaction to which this change belongs; will not be present for non-transactional logical decoding messages for instance

getTable

public String getTable()

Specified by:

getTable in interface ReplicationMessage

Returns:

Table changed

getOldTupleList

public List<ReplicationMessage.Column> getOldTupleList()

Specified by:

getOldTupleList in interface ReplicationMessage

Returns:

Set of original values of table columns, null for INSERT

getNewTupleList

public List<ReplicationMessage.Column> getNewTupleList()

Specified by:

getNewTupleList in interface ReplicationMessage

Returns:

Set of new values of table columns, null for DELETE

hasTypeMetadata

public boolean hasTypeMetadata()

Specified by:

hasTypeMetadata in interface ReplicationMessage

Returns:

true if type metadata are passed as a part of message

transform

private List<ReplicationMessage.Column> transform(Document data,
 String nameField,
 String typeField,
 String valueField,
 String optionalsField)

parseType

private String parseType(String columnName,
 String typeWithModifiers)

getValue

public Object getValue(String columnName,
 PostgresType type,
 String fullType,
 Value rawValue,
 PostgresStreamingChangeEventSource.PgConnectionSupplier connection,
 boolean includeUnknownDatatypes)

Converts the value (string representation) coming from wal2json plugin to a Java value based on the type of the column from the message. This value will be converted later on if necessary by the PostgresValueConverter#converter(Column, Field) instance to match whatever the Connect schema type expects. Note that the logic here is tightly coupled (i.e. dependent) on the wal2json plugin logic which writes the actual JSON messages.

Parameters:

a - supplier to get a connection to Postgres instance for array handling

Returns:

the value; may be null

isLastEventForLsn

public boolean isLastEventForLsn()

Specified by:

isLastEventForLsn in interface ReplicationMessage

Returns:

true if this is the last message in the batch of messages with same LSN