Package io.debezium.connector.mysql.signal

Class KafkaSignalThread<T extends io.debezium.spi.schema.DataCollectionId>

java.lang.Object

io.debezium.connector.mysql.signal.KafkaSignalThread<T>

public class KafkaSignalThread<T extends io.debezium.spi.schema.DataCollectionId>
extends Object

The class responsible for processing of signals delivered to Debezium via a dedicated Kafka topic. The signal message must have the following structure:

• id STRING - the unique identifier of the signal sent, usually UUID, can be used for deduplication
• type STRING - the unique logical name of the code executing the signal
• data STRING - the data in JSON format that are passed to the signal code

Field Summary

Fields

Modifier and Type	Field	Description
static final Field	BOOTSTRAP_SERVERS
static final String	CONFIGURATION_FIELD_PREFIX_STRING
private final String	connectorName
private static final String	CONSUMER_PREFIX
private final MySqlReadOnlyIncrementalSnapshotChangeEventSource<T>	eventSource
private static final org.slf4j.Logger	LOGGER
private final Duration	pollTimeoutMs
static final Field	SIGNAL_POLL_TIMEOUT_MS
static final Field	SIGNAL_TOPIC
private final org.apache.kafka.clients.consumer.KafkaConsumer<String,String>	signalsConsumer
private final ExecutorService	signalTopicListenerExecutor
private final String	topicName

Constructor Summary

Constructors

Constructor	Description
KafkaSignalThread(Class<? extends org.apache.kafka.connect.source.SourceConnector> connectorType, CommonConnectorConfig connectorConfig, MySqlReadOnlyIncrementalSnapshotChangeEventSource<T> eventSource)

Method Summary

Modifier and Type	Method	Description
private void	executePause(Document data)
private void	executeResume(Document data)
private void	executeSnapshot(Document data, long signalOffset)
private void	executeStopSnapshot(Document data, long signalOffset)
private void	monitorSignals()
private void	processSignal(org.apache.kafka.clients.consumer.ConsumerRecord<String,String> record)
void	seek(long signalOffset)
void	start()

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

signalTopicListenerExecutor

private final ExecutorService signalTopicListenerExecutor

topicName

private final String topicName

connectorName

private final String connectorName

pollTimeoutMs

private final Duration pollTimeoutMs

eventSource

private final MySqlReadOnlyIncrementalSnapshotChangeEventSource<T extends io.debezium.spi.schema.DataCollectionId> eventSource

signalsConsumer

private final org.apache.kafka.clients.consumer.KafkaConsumer<String,String> signalsConsumer

CONFIGURATION_FIELD_PREFIX_STRING

public static final String CONFIGURATION_FIELD_PREFIX_STRING

See Also:

• Constant Field Values

CONSUMER_PREFIX

private static final String CONSUMER_PREFIX

See Also:

• Constant Field Values

SIGNAL_TOPIC

public static final Field SIGNAL_TOPIC

BOOTSTRAP_SERVERS

public static final Field BOOTSTRAP_SERVERS

SIGNAL_POLL_TIMEOUT_MS

public static final Field SIGNAL_POLL_TIMEOUT_MS

Constructor Details

KafkaSignalThread

public KafkaSignalThread(Class<? extends org.apache.kafka.connect.source.SourceConnector> connectorType,
 CommonConnectorConfig connectorConfig,
 MySqlReadOnlyIncrementalSnapshotChangeEventSource<T> eventSource)

Method Details

start

public void start()

monitorSignals

private void monitorSignals()

processSignal

private void processSignal(org.apache.kafka.clients.consumer.ConsumerRecord<String,String> record)
                    throws IOException,
InterruptedException

Throws:

IOException

InterruptedException

executeSnapshot

private void executeSnapshot(Document data,
 long signalOffset)

executeStopSnapshot

private void executeStopSnapshot(Document data,
 long signalOffset)

executePause

private void executePause(Document data)

executeResume

private void executeResume(Document data)

seek

public void seek(long signalOffset)