object Consumer
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- sealed trait AutoOffsetStrategy extends AnyRef
- sealed trait OffsetRetrieval extends AnyRef
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!=(arg0: Any): Boolean
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final
def
asInstanceOf[T0]: T0
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def
assignment: RIO[Consumer, Set[TopicPartition]]
Accessor method for Consumer.assignment
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def
beginningOffsets(partitions: Set[TopicPartition], timeout: zio.Duration = Duration.Infinity): RIO[Consumer, Map[TopicPartition, Long]]
Accessor method for Consumer.beginningOffsets
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def
clone(): AnyRef
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def
committed(partitions: Set[TopicPartition], timeout: zio.Duration = Duration.Infinity): RIO[Consumer, Map[TopicPartition, Option[OffsetAndMetadata]]]
Accessor method for Consumer.committed
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def
consumeWith[R, R1, K, V](settings: ConsumerSettings, subscription: Subscription, keyDeserializer: Deserializer[R, K], valueDeserializer: Deserializer[R, V], commitRetryPolicy: Schedule[Any, Any, Any] = ...)(f: (ConsumerRecord[K, V]) ⇒ URIO[R1, Unit])(implicit arg0: Tag[R], arg1: Tag[R1]): RIO[zio.&[R, R1], Unit]
Execute an effect for each record and commit the offset after processing
Execute an effect for each record and commit the offset after processing
This method is the easiest way of processing messages on a Kafka topic.
Messages on a single partition are processed sequentially, while the processing of multiple partitions happens in parallel.
Offsets are committed after execution of the effect. They are batched when a commit action is in progress to avoid backpressuring the stream. When commits fail due to a org.apache.kafka.clients.consumer.RetriableCommitFailedException they are retried according to commitRetryPolicy
The effect should absorb any failures. Failures should be handled by retries or ignoring the error, which will result in the Kafka message being skipped.
Messages are processed with 'at least once' consistency: it is not guaranteed that every message that is processed by the effect has a corresponding offset commit before stream termination.
Usage example:
val settings: ConsumerSettings = ??? val subscription = Subscription.Topics(Set("my-kafka-topic")) val consumerIO = Consumer.consumeWith(settings, subscription, Serdes.string, Serdes.string) { record => // Process the received record here putStrLn(s"Received record: ${record.key()}: ${record.value()}") }
- R
Environment for the consuming effect
- R1
Environment for the deserializers
- K
Type of keys (an implicit
Deserializershould be in scope)- V
Type of values (an implicit
Deserializershould be in scope)- settings
Settings for creating a Consumer
- subscription
Topic subscription parameters
- keyDeserializer
Deserializer for the key of the messages
- valueDeserializer
Deserializer for the value of the messages
- commitRetryPolicy
Retry commits that failed due to a RetriableCommitFailedException according to this schedule
- f
Function that returns the effect to execute for each message. It is passed the org.apache.kafka.clients.consumer.ConsumerRecord.
- returns
Effect that completes with a unit value only when interrupted. May fail when the Consumer fails.
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def
endOffsets(partitions: Set[TopicPartition], timeout: zio.Duration = Duration.Infinity): RIO[Consumer, Map[TopicPartition, Long]]
Accessor method for Consumer.endOffsets
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final
def
eq(arg0: AnyRef): Boolean
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def
equals(arg0: Any): Boolean
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def
finalize(): Unit
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final
def
getClass(): Class[_]
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def
hashCode(): Int
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final
def
isInstanceOf[T0]: Boolean
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def
listTopics(timeout: zio.Duration = Duration.Infinity): RIO[Consumer, Map[String, List[PartitionInfo]]]
Accessor method for Consumer.listTopics
- def live: RLayer[zio.&[ConsumerSettings, Diagnostics], Consumer]
- def make(settings: ConsumerSettings, diagnostics: Diagnostics = Diagnostics.NoOp): ZIO[Scope, Throwable, Consumer]
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def
metrics: RIO[Consumer, Map[MetricName, Metric]]
Accessor method for Consumer.metrics
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final
def
ne(arg0: AnyRef): Boolean
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final
def
notify(): Unit
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final
def
notifyAll(): Unit
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- val offsetBatches: ZSink[Any, Nothing, Offset, Nothing, OffsetBatch]
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def
offsetsForTimes(timestamps: Map[TopicPartition, Long], timeout: zio.Duration = Duration.Infinity): RIO[Consumer, Map[TopicPartition, OffsetAndTimestamp]]
Accessor method for Consumer.offsetsForTimes
- def partitionedAssignmentStream[R, K, V](subscription: Subscription, keyDeserializer: Deserializer[R, K], valueDeserializer: Deserializer[R, V]): ZStream[Consumer, Throwable, Chunk[(TopicPartition, ZStream[R, Throwable, CommittableRecord[K, V]])]]
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def
partitionedStream[R, K, V](subscription: Subscription, keyDeserializer: Deserializer[R, K], valueDeserializer: Deserializer[R, V]): ZStream[Consumer, Throwable, (TopicPartition, ZStream[R, Throwable, CommittableRecord[K, V]])]
Accessor method for Consumer.partitionedStream
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def
partitionsFor(topic: String, timeout: zio.Duration = Duration.Infinity): RIO[Consumer, List[PartitionInfo]]
Accessor method for Consumer.partitionsFor
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def
plainStream[R, K, V](subscription: Subscription, keyDeserializer: Deserializer[R, K], valueDeserializer: Deserializer[R, V], bufferSize: Int = 4): ZStream[zio.&[R, Consumer], Throwable, CommittableRecord[K, V]]
Accessor method for Consumer.plainStream
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def
position(partition: TopicPartition, timeout: zio.Duration = Duration.Infinity): RIO[Consumer, Long]
Accessor method for Consumer.position
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def
stopConsumption: RIO[Consumer, Unit]
Accessor method for Consumer.stopConsumption
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def
subscription: RIO[Consumer, Set[String]]
Accessor method for Consumer.subscription
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final
def
synchronized[T0](arg0: ⇒ T0): T0
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def
toString(): String
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final
def
wait(): Unit
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def
wait(arg0: Long, arg1: Int): Unit
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final
def
wait(arg0: Long): Unit
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- object AutoOffsetStrategy
- object OffsetRetrieval
- object RunloopTimeout extends RuntimeException with NoStackTrace with Product with Serializable