object Transactional
Apache Pekko Stream connector to support transactions between Kafka topics.
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- Transactional.scala
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- 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. - def flowWithOffsetContext[K, V](settings: ProducerSettings[K, V], transactionalId: String): 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 Apache Pekko's [flow with context](https://pekko.apache.org/docs/pekko/current/stream/operators/Flow/asFlowWithContext.html) and Transactional.sourceWithOffsetContext.
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- 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.
- def sinkWithOffsetContext[K, V](settings: ProducerSettings[K, V], transactionalId: String): 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.
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- 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).
- 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 Apache Pekko's [flow with context](https://pekko.apache.org/docs/pekko/current/stream/operators/Flow/asFlowWithContext.html) and Transactional.flowWithOffsetContext.
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