object Transactional
Akka Stream connector to support transactions between Kafka topics.
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- Transactional.scala
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def
flow[K, V, IN <: Envelope[K, V, PartitionOffset]](settings: ProducerSettings[K, V], transactionalId: String): Flow[IN, 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 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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def
sink[K, V, IN <: Envelope[K, V, PartitionOffset]](settings: ProducerSettings[K, V], transactionalId: String): Sink[IN, CompletionStage[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.
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def
source[K, V](consumerSettings: 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).
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