Class

org.apache.gearpump.streaming.dsl.partitioner

GroupByPartitioner

Related Doc: package partitioner

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class GroupByPartitioner[T, GROUP] extends UnicastPartitioner

Partition messages by applying group by function first.

For example:

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

object Test{

  val groupBy: (People => String) = people => people.gender
  val partitioner = GroupByPartitioner(groupBy)
}
Linear Supertypes
UnicastPartitioner, Partitioner, Serializable, Serializable, AnyRef, Any
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Inherited
  1. GroupByPartitioner
  2. UnicastPartitioner
  3. Partitioner
  4. Serializable
  5. Serializable
  6. AnyRef
  7. Any
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Visibility
  1. Public
  2. All

Instance Constructors

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

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    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.

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. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  7. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  8. def finalize(): Unit

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

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

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    Definition Classes
    AnyRef → Any

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

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    Definition Classes
    GroupByPartitioner → UnicastPartitioner

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

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    Definition Classes
    UnicastPartitioner

  12. def hashCode(): Int

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    Definition Classes
    AnyRef → Any

  13. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

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

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    Definition Classes
    AnyRef

  15. final def notify(): Unit

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    Definition Classes
    AnyRef

  16. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

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

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    Definition Classes
    AnyRef

  18. def toString(): String

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    Definition Classes
    AnyRef → Any

  19. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from UnicastPartitioner

Inherited from Partitioner

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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