Packages

abstract class Callback[-E, -A] extends (Either[E, A]) ⇒ Unit

Represents a callback that should be called asynchronously with the result of a computation.

This is an Either[E, A] => Unit with an OOP interface that avoids extra boxing, along with overloads of apply.

The onSuccess method should be called only once, with the successful result, whereas onError should be called if the result is an error.

Obviously Callback describes unsafe side-effects, a fact that is highlighted by the usage of Unit as the return type. Obviously callbacks are unsafe to use in pure code, but are necessary for describing asynchronous processes.

Source
Callback.scala
Linear Supertypes
(Either[E, A]) ⇒ Unit, AnyRef, Any
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  1. Callback
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Instance Constructors

  1. new Callback()

Abstract Value Members

  1. abstract def onError(e: E): Unit
  2. abstract def onSuccess(value: A): Unit

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. def andThen[A](g: (Unit) ⇒ A): (Either[E, A]) ⇒ A
    Definition Classes
    Function1
    Annotations
    @unspecialized()
  5. def apply(result: Try[A])(implicit ev: <:<[Throwable, E]): Unit
  6. def apply(result: Either[E, A]): Unit
    Definition Classes
    Callback → Function1
  7. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  8. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  9. def compose[A](g: (A) ⇒ Either[E, A]): (A) ⇒ Unit
    Definition Classes
    Function1
    Annotations
    @unspecialized()
  10. def contramap[B](f: (B) ⇒ A): Callback[E, B]

    Return a new callback that will apply the supplied function before passing the result into this callback.

  11. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  12. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  13. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  14. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  15. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  16. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  17. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  18. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  19. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  20. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  21. def toString(): String
    Definition Classes
    Function1 → AnyRef → Any
  22. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  23. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  24. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )

Inherited from (Either[E, A]) ⇒ Unit

Inherited from AnyRef

Inherited from Any

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