Packages

abstract class ReadSideHandler[Event <: AggregateEvent[Event]] extends AnyRef

An read side offset processor.

This is responsible for the actual read side handling, including handling offsets and the events themselves.

Source
ReadSideProcessor.scala
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  1. ReadSideHandler
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Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
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Instance Constructors

  1. new ReadSideHandler()

Abstract Value Members

  1. abstract def handle(): Flow[EventStreamElement[Event], Done, NotUsed]

    Flow to handle the events.

    Flow to handle the events.

    If the handler does any blocking, this flow should be configured to use a dispatcher that is configured to allow for that blocking.

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from ReadSideHandler[Event] to any2stringadd[ReadSideHandler[Event]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (ReadSideHandler[Event], B)
    Implicit
    This member is added by an implicit conversion from ReadSideHandler[Event] to ArrowAssoc[ReadSideHandler[Event]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  6. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  7. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  8. def ensuring(cond: (ReadSideHandler[Event]) ⇒ Boolean, msg: ⇒ Any): ReadSideHandler[Event]
    Implicit
    This member is added by an implicit conversion from ReadSideHandler[Event] to Ensuring[ReadSideHandler[Event]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  9. def ensuring(cond: (ReadSideHandler[Event]) ⇒ Boolean): ReadSideHandler[Event]
    Implicit
    This member is added by an implicit conversion from ReadSideHandler[Event] to Ensuring[ReadSideHandler[Event]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  10. def ensuring(cond: Boolean, msg: ⇒ Any): ReadSideHandler[Event]
    Implicit
    This member is added by an implicit conversion from ReadSideHandler[Event] to Ensuring[ReadSideHandler[Event]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  11. def ensuring(cond: Boolean): ReadSideHandler[Event]
    Implicit
    This member is added by an implicit conversion from ReadSideHandler[Event] to Ensuring[ReadSideHandler[Event]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  14. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  15. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from ReadSideHandler[Event] to StringFormat[ReadSideHandler[Event]] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  16. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  17. def globalPrepare(): Future[Done]

    Prepare the database for all processors.

    Prepare the database for all processors.

    This will be invoked at system startup. It is guaranteed to only be invoked once at a time across the entire cluster, and so is safe to be used to perform actions like creating tables, that could cause problems if done from multiple nodes.

    It will be invoked again if it fails, and it may be invoked multiple times as nodes of the cluster go up or down. Unless the entire system is restarted, there is no way to guarantee that it will be invoked at a particular time - in particular, it should not be used for doing upgrades unless the entire system is restarted and a new cluster built from scratch.

    returns

    A Future that is redeemed when preparation is finished.

  18. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  19. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  20. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  21. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  22. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  23. def prepare(tag: AggregateEventTag[Event]): Future[Offset]

    Prepare this processor.

    Prepare this processor.

    The primary purpose of this method is to load the last offset that was processed, so that read side processing can continue from that offset.

    This also provides an opportunity for processors to do any initialisation activities, such as creating or updating database tables, or migrating data.

    This will be invoked at least once for each tag, and may be invoked multiple times, such as in the event of failure.

    tag

    The tag to get the offset for.

    returns

    A Future that is redeemed when preparation is finished.

  24. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  25. def toString(): String
    Definition Classes
    AnyRef → Any
  26. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  27. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  28. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  29. def →[B](y: B): (ReadSideHandler[Event], B)
    Implicit
    This member is added by an implicit conversion from ReadSideHandler[Event] to ArrowAssoc[ReadSideHandler[Event]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from ReadSideHandler[Event] to any2stringadd[ReadSideHandler[Event]]

Inherited by implicit conversion StringFormat from ReadSideHandler[Event] to StringFormat[ReadSideHandler[Event]]

Inherited by implicit conversion Ensuring from ReadSideHandler[Event] to Ensuring[ReadSideHandler[Event]]

Inherited by implicit conversion ArrowAssoc from ReadSideHandler[Event] to ArrowAssoc[ReadSideHandler[Event]]

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