Object

akka.kafka

ProducerMessage

Related Doc: package kafka

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object ProducerMessage

Classes that are used in both javadsl.Producer and scaladsl.Producer.

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  1. final case class Message[K, V, +PassThrough](record: ProducerRecord[K, V], passThrough: PassThrough) extends Product with Serializable

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    Input element of Producer#commitableSink and Producer#flow.

    Input element of Producer#commitableSink and Producer#flow.

    The record contains a topic name to which the record is being sent, an optional partition number, and an optional key and value.

    The passThrough field may hold any element that is passed through the Consumer#flow and included in the Result. That is useful when some context is needed to be passed on downstream operations. That could be done with unzip/zip, but this is more convenient. It can for example be a ConsumerMessage.CommittableOffset or ConsumerMessage.CommittableOffsetBatch that can be committed later in the flow.

  2. final case class Result[K, V, PassThrough](metadata: RecordMetadata, message: Message[K, V, PassThrough]) extends Product with Serializable

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    Output element of Producer#flow.

    Output element of Producer#flow. Emitted when the message has been successfully published. Includes the original message, metadata returned from KafkaProducer and the offset of the produced message.

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