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akka.actor.typed.scaladsl

AbstractBehavior

abstract class AbstractBehavior[T] extends ExtensibleBehavior[T]

An actor Behavior can be implemented by extending this class and implement the abstract method AbstractBehavior#onMessage and optionally override AbstractBehavior#onSignal. Mutable state can be defined as instance variables of the class.

This is an Object-oriented style of defining a Behavior. A more functional style alternative is provided by the factory methods in Behaviors, for example Behaviors.receiveMessage.

Instances of this behavior should be created via Behaviors.setup and the ActorContext should be passed as a constructor parameter from the factory function. This is important because a new instance should be created when restart supervision is used.

When switching Behavior to another AbstractBehavior the original ActorContext can be used as the context parameter instead of wrapping in a new Behaviors.setup, but it wouldn't be wrong to use context from Behaviors.setup since that is the same ActorContext instance.

It must not be created with an ActorContext of another actor, such as the parent actor. Such mistake will be detected at runtime and throw IllegalStateException when the first message is received.

Source
AbstractBehavior.scala
See also

Behaviors.setup

Linear Supertypes
Type Hierarchy
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Inherited
  1. AbstractBehavior
  2. ExtensibleBehavior
  3. Behavior
  4. AnyRef
  5. Any
Implicitly
  1. by BehaviorDecorators
  2. by any2stringadd
  3. by StringFormat
  4. by Ensuring
  5. by ArrowAssoc
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new AbstractBehavior(context: ActorContext[T])

Abstract Value Members

  1. abstract def onMessage(msg: T): Behavior[T]

    Implement this method to process an incoming message and return the next behavior.

    Implement this method to process an incoming message and return the next behavior.

    The returned behavior can in addition to normal behaviors be one of the canned special objects:

    • returning stopped will terminate this Behavior
    • returning this or same designates to reuse the current Behavior
    • returning unhandled keeps the same Behavior and signals that the message was not yet handled
    Annotations
    @throws(classOf[Exception])

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 AbstractBehavior[T] toany2stringadd[AbstractBehavior[T]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (AbstractBehavior[T], B)
    Implicit
    This member is added by an implicit conversion from AbstractBehavior[T] toArrowAssoc[AbstractBehavior[T]] 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. val behavior: Behavior[T]
    Implicit
    This member is added by an implicit conversion from AbstractBehavior[T] toBehaviorDecorators[T] performed by method BehaviorDecorators in akka.actor.typed.Behavior.
    Definition Classes
    BehaviorDecorators
  8. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native() @HotSpotIntrinsicCandidate()
  9. val context: ActorContext[T]
    Attributes
    protected
  10. def ensuring(cond: (AbstractBehavior[T]) => Boolean, msg: => Any): AbstractBehavior[T]
    Implicit
    This member is added by an implicit conversion from AbstractBehavior[T] toEnsuring[AbstractBehavior[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  11. def ensuring(cond: (AbstractBehavior[T]) => Boolean): AbstractBehavior[T]
    Implicit
    This member is added by an implicit conversion from AbstractBehavior[T] toEnsuring[AbstractBehavior[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. def ensuring(cond: Boolean, msg: => Any): AbstractBehavior[T]
    Implicit
    This member is added by an implicit conversion from AbstractBehavior[T] toEnsuring[AbstractBehavior[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  13. def ensuring(cond: Boolean): AbstractBehavior[T]
    Implicit
    This member is added by an implicit conversion from AbstractBehavior[T] toEnsuring[AbstractBehavior[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  14. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  15. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  16. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from AbstractBehavior[T] toStringFormat[AbstractBehavior[T]] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  17. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  18. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  19. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  20. final def narrow[U <: T]: Behavior[U]

    Narrow the type of this Behavior, which is always a safe operation.

    Narrow the type of this Behavior, which is always a safe operation. This method is necessary to implement the contravariant nature of Behavior (which cannot be expressed directly due to type inference problems).

    Definition Classes
    Behavior
  21. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  22. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  23. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  24. def onSignal: PartialFunction[Signal, Behavior[T]]

    Override this method to process an incoming akka.actor.typed.Signal and return the next behavior.

    Override this method to process an incoming akka.actor.typed.Signal and return the next behavior. This means that all lifecycle hooks, ReceiveTimeout, Terminated and Failed messages can initiate a behavior change.

    The returned behavior can in addition to normal behaviors be one of the canned special objects:

    * returning stopped will terminate this Behavior * returning this or same designates to reuse the current Behavior * returning unhandled keeps the same Behavior and signals that the message was not yet handled

    By default, partial function is empty and does not handle any signals.

    Annotations
    @throws(classOf[Exception])
  25. final def receive(ctx: TypedActorContext[T], msg: T): Behavior[T]

    Process an incoming message and return the next behavior.

    Process an incoming message and return the next behavior.

    The returned behavior can in addition to normal behaviors be one of the canned special objects:

    * returning stopped will terminate this Behavior * returning same designates to reuse the current Behavior * returning unhandled keeps the same Behavior and signals that the message was not yet handled

    Code calling this method should use Behavior$ canonicalize to replace the special objects with real Behaviors.

    Definition Classes
    AbstractBehaviorExtensibleBehavior
    Annotations
    @throws(classOf[Exception])
  26. final def receiveSignal(ctx: TypedActorContext[T], msg: Signal): Behavior[T]

    Process an incoming Signal and return the next behavior.

    Process an incoming Signal and return the next behavior. This means that all lifecycle hooks, ReceiveTimeout, Terminated and Failed messages can initiate a behavior change.

    The returned behavior can in addition to normal behaviors be one of the canned special objects:

    * returning stopped will terminate this Behavior * returning same designates to reuse the current Behavior * returning unhandled keeps the same Behavior and signals that the message was not yet handled

    Code calling this method should use Behavior$ canonicalize to replace the special objects with real Behaviors.

    Definition Classes
    AbstractBehaviorExtensibleBehavior
    Annotations
    @throws(classOf[Exception])
  27. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  28. def toString(): String
    Definition Classes
    AnyRef → Any
  29. def transformMessages[Outer](matcher: PartialFunction[Outer, T])(implicit arg0: ClassTag[Outer]): Behavior[Outer]

    Transform the incoming messages by placing a funnel in front of the wrapped Behavior: the supplied PartialFunction decides which message to pull in (those that it is defined at) and may transform the incoming message to place them into the wrapped Behavior’s type hierarchy.

    Transform the incoming messages by placing a funnel in front of the wrapped Behavior: the supplied PartialFunction decides which message to pull in (those that it is defined at) and may transform the incoming message to place them into the wrapped Behavior’s type hierarchy. Signals are not transformed.

    Example:

    val b: Behavior[Number] =
      Behaviors
        .receive[String] { (ctx, msg) =>
          println(msg)
          Behaviors.same
        }
        .transformMessages[Number] {
          case b: BigDecimal => s"BigDecimal($b)"
          case i: BigInt     => s"BigInteger($i)"
          // all other kinds of Number will be `unhandled`
        }

    The ClassTag for Outer ensures that only messages of this class or a subclass thereof will be intercepted. Other message types (e.g. a private protocol) will bypass the interceptor and be continue to the inner behavior untouched.

    Implicit
    This member is added by an implicit conversion from AbstractBehavior[T] toBehaviorDecorators[T] performed by method BehaviorDecorators in akka.actor.typed.Behavior.
    Definition Classes
    BehaviorDecorators
  30. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  31. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()
  32. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable]) @Deprecated
    Deprecated
  2. def [B](y: B): (AbstractBehavior[T], B)
    Implicit
    This member is added by an implicit conversion from AbstractBehavior[T] toArrowAssoc[AbstractBehavior[T]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use -> instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.

Inherited from ExtensibleBehavior[T]

Inherited from Behavior[T]

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion BehaviorDecorators fromAbstractBehavior[T] to BehaviorDecorators[T]

Inherited by implicit conversion any2stringadd fromAbstractBehavior[T] to any2stringadd[AbstractBehavior[T]]

Inherited by implicit conversion StringFormat fromAbstractBehavior[T] to StringFormat[AbstractBehavior[T]]

Inherited by implicit conversion Ensuring fromAbstractBehavior[T] to Ensuring[AbstractBehavior[T]]

Inherited by implicit conversion ArrowAssoc fromAbstractBehavior[T] to ArrowAssoc[AbstractBehavior[T]]

Ungrouped