Packages

abstract class Effect[+Event, State] extends AnyRef

A command handler returns an Effect directive that defines what event or events to persist.

Additional side effects can be performed in the callback andThen

Instances of Effect are available through factories EventSourcedBehavior.Effect.

Not intended for user extension.

Self Type
EffectImpl[Event, State]
Annotations
@DoNotInherit()
Source
Effect.scala
Linear Supertypes
AnyRef, Any
Known Subclasses
ReplyEffect
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Inherited
  1. Effect
  2. AnyRef
  3. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new Effect()

Abstract Value Members

  1. abstract def andThen(chainedEffect: SideEffect[State]): Effect[Event, State]

    Run the given callback after the current Effect

  2. abstract def thenNoReply(): ReplyEffect[Event, State]

    When EventSourcedBehaviorWithEnforcedReplies is used there will be compilation errors if the returned effect isn't a ReplyEffect.

    When EventSourcedBehaviorWithEnforcedReplies is used there will be compilation errors if the returned effect isn't a ReplyEffect. This thenNoReply can be used as a conscious decision that a reply shouldn't be sent for a specific command or the reply will be sent later.

  3. abstract def thenStop(): Effect[Event, State]

    The side effect is to stop the actor

  4. abstract def thenUnstashAll(): Effect[Event, State]

    Unstash the commands that were stashed with EffectFactories.stash.

    Unstash the commands that were stashed with EffectFactories.stash.

    It's allowed to stash messages while unstashing. Those newly added commands will not be processed by this unstashAll effect and have to be unstashed by another unstashAll.

Concrete Value Members

  1. def thenReply[ReplyMessage](cmd: ExpectingReply[ReplyMessage], replyWithMessage: Function[State, ReplyMessage]): ReplyEffect[Event, State]

    Send a reply message to the command, which implements ExpectingReply.

    Send a reply message to the command, which implements ExpectingReply. The type of the reply message must conform to the type specified in ExpectingReply.replyTo ActorRef.

    This has the same semantics as cmd.replyTo().tell.

    It is provided as a convenience (reducing boilerplate) and a way to enforce that replies are not forgotten when the EventSourcedBehavior is created with EventSourcedBehaviorWithEnforcedReplies. When withEnforcedReplies is used there will be compilation errors if the returned effect isn't a ReplyEffect. The reply message will be sent also if withEnforcedReplies isn't used, but then the compiler will not help finding mistakes.

  2. final def thenRun(callback: japi.function.Effect): Effect[Event, State]

    Run the given callback.

    Run the given callback. Callbacks are run sequentially.

  3. final def thenRun(callback: Procedure[State]): Effect[Event, State]

    Run the given callback.

    Run the given callback. Callbacks are run sequentially.