vertx-lang-scala-docs_2.12 3.4.2 API < Back
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# Packages

-  package root
  Definition Classes
    root
-  package io
  Definition Classes
    root
-  package vertx
  Definition Classes
    io
-  package scala
  Definition Classes
    vertx
-  package core
  Definition Classes
    scala
-  package cli
  Definition Classes
    core
-  package datagram
  Definition Classes
    core
-  package dns
  Definition Classes
    core
-  package eventbus
  Definition Classes
    core
-  package file
  Definition Classes
    core
-  package http
  Definition Classes
    core
-  package metrics
  Definition Classes
    core
-  package net
  Definition Classes
    core
-  package parsetools
  Definition Classes
    core
-  package shareddata
  Definition Classes
    core
-  package streams
  Definition Classes
    core
- CompositeFuture
- Context
- DeploymentOptions
- Future
- MultiMap
- TimeoutStream
- Vertx
- VertxOptions
- WorkerExecutor

c

io.vertx.scala.core

# Future 

###
Companion object Future

#### class Future[T] extends AnyRef

Represents the result of an action that may, or may not, have occurred yet.

Linear Supertypes
AnyRef, Any
Known Subclasses
CompositeFuture, BridgeEvent
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Inherited

1. Future
2. AnyRef
3. Any

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Visibility

1. Public
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### Instance Constructors

1.  new Future(_asJava: AnyRef)(implicit arg0: scala.reflect.api.JavaUniverse.TypeTag[T])

### 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.  final def asInstanceOf[T0]: T0
   Definition Classes
     Any
5.  def asJava: AnyRef
6.  def cause(): Throwable

   A Throwable describing failure.

   A Throwable describing failure. This will be null if the operation succeeded.

   returns

     the cause or null if the operation succeeded.

7.  def clone(): AnyRef
   Attributes
     protected[java.lang]
   Definition Classes
     AnyRef
   Annotations
     @throws( ... )
8.  def complete(): Unit

   Set a null result.

   Set a null result. Any handler will be called, if there is one, and the future will be marked as completed.

9.  def complete(result: T): Unit

   Set the result.

   Set the result. Any handler will be called, if there is one, and the future will be marked as completed.

   result

     the result

10.  def completer(): Handler[AsyncResult[T]]

    returns

      an handler completing this future

11.  def compose[U](mapper: (T) ⇒ Future[U])(implicit arg0: scala.reflect.api.JavaUniverse.TypeTag[U]): Future[U]

    Compose this future with a `mapper` function.

    Compose this future with a `mapper` function.

    When this future (the one on which `compose` is called) succeeds, the `mapper` will be called with the completed value and this mapper returns another future object. This returned future completion will complete the future returned by this method call.

    If the `mapper` throws an exception, the returned future will be failed with this exception.

    When this future fails, the failure will be propagated to the returned future and the `mapper` will not be called.

    mapper

      the mapper function

    returns

      the composed future

12.  def compose[U](handler: Handler[T], next: Future[U])(implicit arg0: scala.reflect.api.JavaUniverse.TypeTag[U]): Future[U]

    Compose this future with a provided `next` future.

    Compose this future with a provided `next` future.

    When this (the one on which `compose` is called) future succeeds, the `handler` will be called with the completed value, this handler should complete the next future.

    If the `handler` throws an exception, the returned future will be failed with this exception.

    When this future fails, the failure will be propagated to the `next` future and the `handler` will not be called.

    handler

      the handler

    next

      the next future

    returns

      the next future, used for chaining

13.  final def eq(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
14.  def equals(arg0: Any): Boolean
    Definition Classes
      AnyRef → Any
15.  def fail(failureMessage: String): Unit

    Try to set the failure.

    Try to set the failure. When it happens, any handler will be called, if there is one, and the future will be marked as completed.

    failureMessage

      the failure message

16.  def fail(cause: Throwable): Unit

    Set the failure.

    Set the failure. Any handler will be called, if there is one, and the future will be marked as completed.

    cause

      the failure cause

17.  def failed(): Boolean

    Did it fail?

    Did it fail?

    returns

      true if it failed or false otherwise

18.  def finalize(): Unit
    Attributes
      protected[java.lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( classOf[java.lang.Throwable] )
19.  final def getClass(): Class[_]
    Definition Classes
      AnyRef → Any
20.  def hashCode(): Int
    Definition Classes
      AnyRef → Any
21.  def isComplete(): Boolean

    Has the future completed?

    Has the future completed?

    It's completed if it's either succeeded or failed.

    returns

      true if completed, false if not

22.  final def isInstanceOf[T0]: Boolean
    Definition Classes
      Any
23.  def map[V](value: V)(implicit arg0: scala.reflect.api.JavaUniverse.TypeTag[V]): Future[V]

    Map the result of a future to a specific `value`.

    Map the result of a future to a specific `value`.

    When this future succeeds, this `value` will complete the future returned by this method call.

    When this future fails, the failure will be propagated to the returned future.

    value

      the value that eventually completes the mapped future

    returns

      the mapped future

24.  def map[U](mapper: (T) ⇒ U)(implicit arg0: scala.reflect.api.JavaUniverse.TypeTag[U]): Future[U]

    Apply a `mapper` function on this future.

    Apply a `mapper` function on this future.

    When this future succeeds, the `mapper` will be called with the completed value and this mapper returns a value. This value will complete the future returned by this method call.

    If the `mapper` throws an exception, the returned future will be failed with this exception.

    When this future fails, the failure will be propagated to the returned future and the `mapper` will not be called.

    mapper

      the mapper function

    returns

      the mapped future

25.  def mapEmpty[V]()(implicit arg0: scala.reflect.api.JavaUniverse.TypeTag[V]): Future[V]

    Map the result of a future to `null`.

    Map the result of a future to `null`.

    This is a conveniency for `future.map((T) null)` or `future.map((Void) null)`.

    When this future succeeds, `null` will complete the future returned by this method call.

    When this future fails, the failure will be propagated to the returned future.

    returns

      the mapped future

26.  final def ne(arg0: AnyRef): Boolean
    Definition Classes
      AnyRef
27.  final def notify(): Unit
    Definition Classes
      AnyRef
28.  final def notifyAll(): Unit
    Definition Classes
      AnyRef
29.  def otherwise(value: T): Future[T]

    Map the failure of a future to a specific `value`.

    Map the failure of a future to a specific `value`.

    When this future fails, this `value` will complete the future returned by this method call.

    When this future succeeds, the result will be propagated to the returned future.

    value

      the value that eventually completes the mapped future

    returns

      the mapped future

30.  def otherwise(mapper: (Throwable) ⇒ T): Future[T]

    Apply a `mapper` function on this future.

    Apply a `mapper` function on this future.

    When this future fails, the `mapper` will be called with the completed value and this mapper returns a value. This value will complete the future returned by this method call.

    If the `mapper` throws an exception, the returned future will be failed with this exception.

    When this future succeeds, the result will be propagated to the returned future and the `mapper` will not be called.

    mapper

      the mapper function

    returns

      the mapped future

31.  def otherwiseEmpty(): Future[T]

    Map the failure of a future to `null`.

    Map the failure of a future to `null`.

    This is a convenience for `future.otherwise((T) null)`.

    When this future fails, the `null` value will complete the future returned by this method call.

    When this future succeeds, the result will be propagated to the returned future.

    returns

      the mapped future

32.  def recover(mapper: (Throwable) ⇒ Future[T]): Future[T]

    Handles a failure of this Future by returning the result of another Future.

    Handles a failure of this Future by returning the result of another Future. If the mapper fails, then the returned future will be failed with this failure.

    mapper

      A function which takes the exception of a failure and returns a new future.

    returns

      A recovered future

33.  def result(): T

    The result of the operation.

    The result of the operation. This will be null if the operation failed.

    returns

      the result or null if the operation failed.

34.  def setHandler(handler: Handler[AsyncResult[T]]): Future[T]

    Set a handler for the result.

    Set a handler for the result.

    If the future has already been completed it will be called immediately. Otherwise it will be called when the future is completed.

    handler

      the Handler that will be called with the result

    returns

      a reference to this, so it can be used fluently

35.  def succeeded(): Boolean

    Did it succeed?

    Did it succeed?

    returns

      true if it succeded or false otherwise

36.  final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
      AnyRef
37.  def toString(): String
    Definition Classes
      AnyRef → Any
38.  def tryComplete(): Boolean

    Try to set the result.

    Try to set the result. When it happens, any handler will be called, if there is one, and the future will be marked as completed.

    returns

      false when the future is already completed

39.  def tryComplete(result: T): Boolean

    Set the failure.

    Set the failure. Any handler will be called, if there is one, and the future will be marked as completed.

    result

      the result

    returns

      false when the future is already completed

40.  def tryFail(failureMessage: String): Boolean

    Try to set the failure.

    Try to set the failure. When it happens, any handler will be called, if there is one, and the future will be marked as completed.

    failureMessage

      the failure message

    returns

      false when the future is already completed

41.  def tryFail(cause: Throwable): Boolean

    Try to set the failure.

    Try to set the failure. When it happens, any handler will be called, if there is one, and the future will be marked as completed.

    cause

      the failure cause

    returns

      false when the future is already completed

42.  final def wait(): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
43.  final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )
44.  final def wait(arg0: Long): Unit
    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

### Inherited from AnyRef

### Inherited from Any

### Ungrouped