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akka.kafka.scaladsl

Transactional

object Transactional

Akka Stream connector to support transactions between Kafka topics.

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

    Publish records to Kafka topics and then continue the flow.

    Publish records to Kafka topics and then continue the flow. The flow can only be used with a Transactional.source that emits a ConsumerMessage.TransactionalMessage. The flow will override producer properties to enable Kafka exactly-once transactional support. A UUID is used for transaction id, optionally prefixed through ProducerSettings.transactionIdPrefix

    Annotations
    @nowarn()
  9. def flowWithOffsetContext[K, V](settings: ProducerSettings[K, V]): FlowWithContext[Envelope[K, V, NotUsed], PartitionOffset, Results[K, V, PartitionOffset], PartitionOffset, NotUsed]

    API MAY CHANGE

    API MAY CHANGE

    Publish records to Kafka topics and then continue the flow. The flow can only be used with a Transactional.sourceWithOffsetContext which carries ConsumerMessage.PartitionOffset as context. The flow requires a unique transactional.id across all app instances. The flow will override producer properties to enable Kafka exactly-once transactional support.

    This flow is intended to be used with Akka's [flow with context](https://doc.akka.io/libraries/akka-core/current/stream/operators/Flow/asFlowWithContext.html) and Transactional.sourceWithOffsetContext.

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

    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 sinkWithOffsetContext[K, V](settings: ProducerSettings[K, V]): Sink[(Envelope[K, V, NotUsed], PartitionOffset), Future[Done]]

    API MAY CHANGE

    API MAY CHANGE

    Sink that requires the context to be ConsumerMessage.PartitionOffset from a Transactional.sourceWithOffsetContext. It will initialize, begin, produce, and commit the consumer offset as part of a transaction.

    Annotations
    @ApiMayChange()
  18. def source[K, V](settings: ConsumerSettings[K, V], subscription: Subscription): Source[TransactionalMessage[K, V], Control]

    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).

  19. def sourceWithOffsetContext[K, V](settings: ConsumerSettings[K, V], subscription: Subscription): SourceWithContext[ConsumerRecord[K, V], PartitionOffset, Control]

    API MAY CHANGE

    API MAY CHANGE

    This source is intended to be used with Akka's [flow with context](https://doc.akka.io/libraries/akka-core/current/stream/operators/Flow/asFlowWithContext.html) and Transactional.flowWithOffsetContext.

    Annotations
    @ApiMayChange()
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  1. def finalize(): Unit
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    Deprecated

    (Since version 9)

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

    Publish records to Kafka topics and then continue the flow.

    Publish records to Kafka topics and then continue the flow. The flow can only be 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.

    Annotations
    @deprecated
    Deprecated

    Use the 'flow' factory without a transactionalId parameter

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

    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.

    Annotations
    @nowarn() @deprecated
    Deprecated

    Use the 'sink' factory method without a transactionalId parameter

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