reactor.kafka.samples

Class SampleScenarios.KafkaExactlyOnce

java.lang.Object

reactor.kafka.samples.SampleScenarios.KafkaExactlyOnce

Enclosing class:

SampleScenarios

public static class SampleScenarios.KafkaExactlyOnce
extends Object

This sample demonstrates an exactly/once transactional flow where messages are received from partitions of a source topic, transformed and sent to a destination topic using a transactional sender. Consumers with ConsumerConfig.ISOLATION_LEVEL_CONFIG read_committed will consume exactly one copy of each message from the destination topic after the messages are committed by the sender. Offsets for the source partitions are committed using the transactional sender to ensure that even if exceptions are encountered, the flow restarts from the last committed state.

Field Summary

Fields

Modifier and Type	Field and Description
protected String	destTopic
protected String	sourceTopic

Constructor Summary

Constructors

Constructor and Description
KafkaExactlyOnce(String bootstrapServers, String sourceTopic, String destTopic)

Method Summary

Modifier and Type	Method and Description
void	close()
String	email(SampleScenarios.Person p)
Flux<?>	flux()
reactor.kafka.receiver.ReceiverOptions<Integer,SampleScenarios.Person>	receiverOptions()
reactor.kafka.receiver.ReceiverOptions<Integer,SampleScenarios.Person>	receiverOptions(Collection<String> topics)
void	runScenario()
reactor.kafka.sender.KafkaSender<Integer,SampleScenarios.Person>	sender(reactor.kafka.sender.SenderOptions<Integer,SampleScenarios.Person> senderOptions)
reactor.kafka.sender.SenderOptions<Integer,SampleScenarios.Person>	senderOptions()
reactor.kafka.samples.SampleScenarios.CommittableSource	source()
void	source(reactor.kafka.samples.SampleScenarios.CommittableSource source)
ProducerRecord<Integer,SampleScenarios.Person>	transform(SampleScenarios.Person p)

Methods inherited from class java.lang.Object

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

Field Detail

sourceTopic

protected final String sourceTopic

destTopic

protected final String destTopic

Constructor Detail

KafkaExactlyOnce

public KafkaExactlyOnce(String bootstrapServers,
                        String sourceTopic,
                        String destTopic)

Method Detail

senderOptions

public reactor.kafka.sender.SenderOptions<Integer,SampleScenarios.Person> senderOptions()

receiverOptions

public reactor.kafka.receiver.ReceiverOptions<Integer,SampleScenarios.Person> receiverOptions()

transform

public ProducerRecord<Integer,SampleScenarios.Person> transform(SampleScenarios.Person p)

email

public String email(SampleScenarios.Person p)

flux

public Flux<?> flux()

runScenario

public void runScenario()
                 throws InterruptedException

Throws:

InterruptedException

close

public void close()

sender

public reactor.kafka.sender.KafkaSender<Integer,SampleScenarios.Person> sender(reactor.kafka.sender.SenderOptions<Integer,SampleScenarios.Person> senderOptions)

receiverOptions

public reactor.kafka.receiver.ReceiverOptions<Integer,SampleScenarios.Person> receiverOptions(Collection<String> topics)

source

public void source(reactor.kafka.samples.SampleScenarios.CommittableSource source)

source

public reactor.kafka.samples.SampleScenarios.CommittableSource source()