Object

akka.kafka.scaladsl

Transactional

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object Transactional

Akka Stream connector to support transactions between Kafka topics.

Source
Transactional.scala
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  9. def flow[K, V](settings: ProducerSettings[K, V], transactionalId: String): Flow[Envelope[K, V, PartitionOffset], Results[K, V, PartitionOffset], NotUsed]

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    Publish records to Kafka topics and then continue the flow.

    Publish records to Kafka topics and then continue the flow. The flow should only used with a Transactional.source that emits a ConsumerMessage.TransactionalMessage. The flow requires a unique transactional.id across all app instances. The flow will override producer properties to enable Kafka exactly once transactional support.

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  14. final def notify(): Unit

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  15. final def notifyAll(): Unit

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  16. def sink[K, V](settings: ProducerSettings[K, V], transactionalId: String): Sink[Envelope[K, V, PartitionOffset], Future[Done]]

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    Sink that is aware of the ConsumerMessage.TransactionalMessage.partitionOffset from a Transactional.source.

    Sink that is aware of the ConsumerMessage.TransactionalMessage.partitionOffset from a Transactional.source. It will initialize, begin, produce, and commit the consumer offset as part of a transaction.

  17. def source[K, V](settings: ConsumerSettings[K, V], subscription: Subscription): Source[TransactionalMessage[K, V], Control]

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    Transactional source to setup a stream for Exactly Only Once (EoS) kafka message semantics.

    Transactional source to setup a stream for Exactly Only Once (EoS) kafka message semantics. To enable EoS it's necessary to use the Transactional.sink or Transactional.flow (for passthrough).

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