org.apache.gearpump.streaming.dsl.partitioner

GroupByPartitioner

Related Doc: package partitioner

class GroupByPartitioner[T, GROUP] extends Partitioner

T
GROUP

must have method hashCode for this type

Linear Supertypes
Partitioner, Serializable, Serializable, AnyRef, Any
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  1. GroupByPartitioner
  2. Partitioner
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Visibility
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Instance Constructors

  1. new GroupByPartitioner(groupBy: (T) ⇒ GROUP = null)

    groupBy

    First apply message with groupBy function, then pick the hashCode of the output to do the partitioning. You must define hashCode() for output type of groupBy function.

    For example: case class People(name: String, gender: String)

    object Test{

    val groupBy: (People => String) = people => people.gender val partitioner = GroupByPartitioner(groupBy) }

Value Members

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

    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

    Definition Classes
    AnyRef → Any

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

    Definition Classes
    AnyRef → Any

  4. final def asInstanceOf[T0]: T0

    Definition Classes
    Any

  5. def clone(): AnyRef

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

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

    Definition Classes
    AnyRef

  7. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any

  8. def finalize(): Unit

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

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

    Definition Classes
    AnyRef → Any

  10. def getPartition(msg: Message, partitionNum: Int, currentPartitionId: Int): Int

    Definition Classes
    GroupByPartitioner → Partitioner

  11. def getPartition(msg: Message, partitionNum: Int): Int

    Definition Classes
    Partitioner

  12. def hashCode(): Int

    Definition Classes
    AnyRef → Any

  13. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any

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

    Definition Classes
    AnyRef

  15. final def notify(): Unit

    Definition Classes
    AnyRef

  16. final def notifyAll(): Unit

    Definition Classes
    AnyRef

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

    Definition Classes
    AnyRef

  18. def toString(): String

    Definition Classes
    AnyRef → Any

  19. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from Partitioner

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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