Class/Object

io.gearpump.streaming.kafka

KafkaSource

Related Docs: object KafkaSource | package kafka

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class KafkaSource extends TimeReplayableSource

Kafka source connectors that pulls a batch of messages (kafka.consumer.emit.batch.size) from multiple Kafka TopicAndPartition in a round-robin way.

This is a TimeReplayableSource which is able to replay messages given a start time. Each kafka message is tagged with a timestamp by io.gearpump.streaming.transaction.api.MessageDecoder and the (offset, timestamp) mapping is stored to a OffsetStorage. On recovery, we could retrieve the previously stored offset from the OffsetStorage by timestamp and start to read from there.

kafka message is wrapped into gearpump Message and further filtered by a TimeStampFilter such that obsolete messages are dropped.

Linear Supertypes
TimeReplayableSource, DataSource, Serializable, AnyRef, Any
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Inherited
  1. KafkaSource
  2. TimeReplayableSource
  3. DataSource
  4. Serializable
  5. AnyRef
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Visibility
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Instance Constructors

  1. new KafkaSource(topics: String, zkConnect: String, offsetStorageFactory: OffsetStorageFactory, messageDecoder: MessageDecoder, timestampFilter: TimeStampFilter)

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    topics

    comma-separated string of topics

    zkConnect

    kafka consumer config zookeeper.connect

    offsetStorageFactory

    io.gearpump.streaming.transaction.api.OffsetStorageFactory that creates io.gearpump.streaming.transaction.api.OffsetStorage

    messageDecoder

    decodes Message from raw bytes

    timestampFilter

    filters out message based on timestamp

  2. new KafkaSource(topics: String, zkConnect: String, offsetStorageFactory: OffsetStorageFactory)

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    topics

    comma-separated string of topics

    zkConnect

    kafka consumer config zookeeper.connect

    offsetStorageFactory

    io.gearpump.streaming.transaction.api.OffsetStorageFactory that creates io.gearpump.streaming.transaction.api.OffsetStorage

  3. new KafkaSource(topics: String, properties: Properties, offsetStorageFactory: OffsetStorageFactory, messageDecoder: MessageDecoder, timestampFilter: TimeStampFilter)

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    topics

    comma-separated string of topics

    properties

    kafka consumer config

    offsetStorageFactory

    io.gearpump.streaming.transaction.api.OffsetStorageFactory that creates io.gearpump.streaming.transaction.api.OffsetStorage

    messageDecoder

    decodes Message from raw bytes

    timestampFilter

    filters out message based on timestamp

  4. new KafkaSource(topics: String, properties: Properties, offsetStorageFactory: OffsetStorageFactory)

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    topics

    comma-separated string of topics

    properties

    kafka consumer config

    offsetStorageFactory

    io.gearpump.streaming.transaction.api.OffsetStorageFactory that creates io.gearpump.streaming.transaction.api.OffsetStorage

  5. new KafkaSource(config: KafkaSourceConfig, offsetStorageFactory: OffsetStorageFactory, messageDecoder: MessageDecoder = new DefaultMessageDecoder, timestampFilter: TimeStampFilter = new DefaultTimeStampFilter, fetchThread: Option[FetchThread] = None, offsetManagers: Map[TopicAndPartition, KafkaOffsetManager] = ...)

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    config

    kafka source config

    messageDecoder

    decodes Message from raw bytes

    timestampFilter

    filters out message based on timestamp

    fetchThread

    fetches messages and puts on a in-memory queue

    offsetManagers

    manages offset-to-timestamp storage for each kafka.common.TopicAndPartition

Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any

  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  4. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

  5. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  6. def close(): Unit

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    Definition Classes
    KafkaSource → DataSource

  7. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  8. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  9. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  10. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any

  11. def hashCode(): Int

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    Definition Classes
    AnyRef → Any

  12. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

  13. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  14. final def notify(): Unit

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    Definition Classes
    AnyRef

  15. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

  16. def open(context: TaskContext, startTime: Option[TimeStamp]): Unit

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    Definition Classes
    KafkaSource → DataSource

  17. def read(batchSize: Int): List[Message]

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    Definition Classes
    KafkaSource → DataSource

  18. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef

  19. def toString(): String

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    Definition Classes
    AnyRef → Any

  20. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  21. final def wait(arg0: Long, arg1: Int): Unit

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    Annotations
    @throws( ... )

  22. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from TimeReplayableSource

Inherited from DataSource

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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