Future

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 apply[T](body: ⇒ T)(implicit executor: ExecutionContext): Future[T]

   

   Starts an asynchronous computation and returns a Future object with the result of that computation.

   Starts an asynchronous computation and returns a Future object with the result of that computation.

   The result becomes available once the asynchronous computation is completed.

   T

   the type of the result

   body

   the asynchronous computation

   executor

   the execution context on which the future is run

   returns

   the Future holding the result of the computation

5. final def asInstanceOf[T0]: T0

   

   Definition Classes

   Any

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 failed[T](exception: Throwable): Future[T]

   

   Creates an already completed Future with the specified exception.

   Creates an already completed Future with the specified exception.

   T

   the type of the value in the future

   returns

   the newly created Future object

10. def finalize(): Unit

    

    Attributes

    protected[java.lang]

    Definition Classes

    AnyRef

    Annotations

    @throws( classOf[java.lang.Throwable] )

11. def find[T](futures: TraversableOnce[Future[T]])(p: (T) ⇒ Boolean)(implicit executor: ExecutionContext): Future[Option[T]]

    

    Returns a Future that will hold the optional result of the first Future with a result that matches the predicate.

12. def firstCompletedOf[T](futures: TraversableOnce[Future[T]])(implicit executor: ExecutionContext): Future[T]

    

    Returns a new Future to the result of the first future in the list that is completed.

13. def fold[T, R](futures: TraversableOnce[Future[T]])(zero: R)(op: (R, T) ⇒ R)(implicit executor: ExecutionContext): Future[R]

    

    A non-blocking fold over the specified futures, with the start value of the given zero.

    A non-blocking fold over the specified futures, with the start value of the given zero. The fold is performed on the thread where the last future is completed, the result will be the first failure of any of the futures, or any failure in the actual fold, or the result of the fold.

    Example:

    val result = Await.result(Future.fold(futures)(0)(_ + _), 5 seconds)

14. def fromTry[T](result: Try[T]): Future[T]

    

    Creates an already completed Future with the specified result or exception.

    Creates an already completed Future with the specified result or exception.

    T

    the type of the value in the promise

    returns

    the newly created Future object

15. final def getClass(): Class[_]

    

    Definition Classes

    AnyRef → Any

16. def hashCode(): Int

    

    Definition Classes

    AnyRef → Any

17. final def isInstanceOf[T0]: Boolean

    

    Definition Classes

    Any

18. final def ne(arg0: AnyRef): Boolean

    

    Definition Classes

    AnyRef

19. final def notify(): Unit

    

    Definition Classes

    AnyRef

20. final def notifyAll(): Unit

    

    Definition Classes

    AnyRef

21. def reduce[T, R >: T](futures: TraversableOnce[Future[T]])(op: (R, T) ⇒ R)(implicit executor: ExecutionContext): Future[R]

    

    Initiates a fold over the supplied futures where the fold-zero is the result value of the Future that's completed first.

    Initiates a fold over the supplied futures where the fold-zero is the result value of the Future that's completed first.

    Example:

    val result = Await.result(Future.reduce(futures)(_ + _), 5 seconds)

22. def sequence[A, M[X] <: TraversableOnce[X]](in: M[Future[A]])(implicit cbf: CanBuildFrom[M[Future[A]], A, M[A]], executor: ExecutionContext): Future[M[A]]

    

    Simple version of Future.traverse.

    Simple version of Future.traverse. Transforms a TraversableOnce[Future[A]] into a Future[TraversableOnce[A]]. Useful for reducing many Futures into a single Future.

23. def successful[T](result: T): Future[T]

    

    Creates an already completed Future with the specified result.

    Creates an already completed Future with the specified result.

    T

    the type of the value in the future

    returns

    the newly created Future object

24. final def synchronized[T0](arg0: ⇒ T0): T0

    

    Definition Classes

    AnyRef

25. def toString(): String

    

    Definition Classes

    AnyRef → Any

26. def traverse[A, B, M[X] <: TraversableOnce[X]](in: M[A])(fn: (A) ⇒ Future[B])(implicit cbf: CanBuildFrom[M[A], B, M[B]], executor: ExecutionContext): Future[M[B]]

    

    Transforms a TraversableOnce[A] into a Future[TraversableOnce[B]] using the provided function A => Future[B].

    Transforms a TraversableOnce[A] into a Future[TraversableOnce[B]] using the provided function A => Future[B]. This is useful for performing a parallel map. For example, to apply a function to all items of a list in parallel:

    val myFutureList = Future.traverse(myList)(x => Future(myFunc(x)))

27. final def wait(): Unit

    

    Definition Classes

    AnyRef

    Annotations

    @throws( ... )

28. final def wait(arg0: Long, arg1: Int): Unit

    

    Definition Classes

    AnyRef

    Annotations

    @throws( ... )

29. final def wait(arg0: Long): Unit

    

    Definition Classes

    AnyRef

    Annotations

    @throws( ... )