io.gearpump.streaming.kafka

KafkaSource

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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  1. KafkaSource
  2. TimeReplayableSource
  3. DataSource
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Instance Constructors

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

    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)

    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)

    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)

    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 = ..., timestampFilter: TimeStampFilter = ..., fetchThread: Option[FetchThread] = scala.None, offsetManagers: Map[TopicAndPartition, KafkaOffsetManager] = ...)

    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: AnyRef): Boolean

    Definition Classes
    AnyRef

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

    Definition Classes
    Any

  3. final def ##(): Int

    Definition Classes
    AnyRef → Any

  4. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef

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

    Definition Classes
    Any

  6. final def asInstanceOf[T0]: T0

    Definition Classes
    Any

  7. def clone(): AnyRef

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

  8. def close(): Unit

    Definition Classes
    KafkaSource → DataSource

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

    Definition Classes
    AnyRef

  10. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any

  11. def finalize(): Unit

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    protected[java.lang]
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    @throws( classOf[java.lang.Throwable] )

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

    Definition Classes
    AnyRef → Any

  13. def hashCode(): Int

    Definition Classes
    AnyRef → Any

  14. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any

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

    Definition Classes
    AnyRef

  16. final def notify(): Unit

    Definition Classes
    AnyRef

  17. final def notifyAll(): Unit

    Definition Classes
    AnyRef

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

    Definition Classes
    KafkaSource → DataSource

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

    Definition Classes
    KafkaSource → DataSource

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

    Definition Classes
    AnyRef

  21. def toString(): String

    Definition Classes
    AnyRef → Any

  22. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

    Definition Classes
    AnyRef
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    @throws( ... )

Inherited from TimeReplayableSource

Inherited from DataSource

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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