org.apache.gearpump.streaming.state.system.api

MonoidState

Related Doc: package api

abstract class MonoidState[T] extends PersistentState[T]

MonoidState uses Algebird Monoid to aggregate state

on start, state value is initialized to monoid.zero on each new message, existing state value is aggregated with the incoming value using monoid.plus to get a new state value

Linear Supertypes
PersistentState[T], AnyRef, Any
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Instance Constructors

  1. new MonoidState(monoid: Monoid[T])

Abstract Value Members

  1. abstract def recover(timestamp: TimeStamp, bytes: Array[Byte]): Unit

    recover state to a previous checkpoint usually invoked by the framework

    recover state to a previous checkpoint usually invoked by the framework

    Definition Classes
    PersistentState

Concrete 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 checkpoint(checkpointTime: TimeStamp): Array[Byte]

    get a binary snapshot of state usually invoked by the framework

    get a binary snapshot of state usually invoked by the framework

    Definition Classes
    MonoidStatePersistentState
  6. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  7. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  8. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any
  9. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  10. def get: Option[T]

    unwrap the raw value of state

    unwrap the raw value of state

    Definition Classes
    MonoidStatePersistentState
  11. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any
  12. def hashCode(): Int

    Definition Classes
    AnyRef → Any
  13. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any
  14. var left: T

    Attributes
    protected
  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. var right: T

    Attributes
    protected
  19. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  20. def toString(): String

    Definition Classes
    AnyRef → Any
  21. def update(timestamp: TimeStamp, t: T, checkpointTime: TimeStamp): Unit

    update state on a new message this is invoked by user

    update state on a new message this is invoked by user

    Definition Classes
    MonoidStatePersistentState
  22. def updateState(timestamp: TimeStamp, t: T, checkpointTime: TimeStamp): Unit

    Attributes
    protected
  23. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  24. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  25. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from PersistentState[T]

Inherited from AnyRef

Inherited from Any

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