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object Promise

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Type Members

  1. trait Detachable extends AnyRef

    A template trait for Promises that are derived and capable of being detached from other Promises.

  2. case class ImmutableResult(message: String) extends Exception with Product with Serializable

    Indicates that an attempt to satisfy a com.twitter.util.Promise was made after that promise had already been satisfied.

  3. trait InterruptHandler extends PartialFunction[Throwable, Unit]

    Embeds an "interrupt handler" into a Promise.

    Embeds an "interrupt handler" into a Promise.

    This is a total handler such that it's defined on any Throwable. Use Promise.setInterruptHandler if you need to leave an interrupt handler undefined for certain types of exceptions.

    Example: (p and q are equivalent, but p allocates less):

    import com.twitter.util.Promise

val p = new Promise[A] with Promise.InterruptHandler {
  def onInterrupt(t: Throwable): Unit = setException(t)
}

val q = new Promise[A]
q.setInterruptHandler { case t: Throwable => q.setException(t) }
    Note

    Later calls to setInterruptHandler on a promise mixing in this trait will replace the embedded handler.

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[A](): Promise[A]

    Create a new, empty, promise of type {{A}}.

  5. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  6. def attached[A](parent: Future[A]): Promise[A] with Detachable

    Create a derivative promise that will be satisfied with the result of the parent.

    Create a derivative promise that will be satisfied with the result of the parent.

    If the derivative promise is detached before the parent is satisfied, then it becomes disconnected from the parent and can be used as a normal, unlinked Promise.

    By the contract of Detachable, satisfaction of the Promise must occur after detachment. Promises should only ever be satisfied after they are successfully detached (thus satisfaction is the responsibility of the detacher).

    Ex:

    val f: Future[Unit]
val p: Promise[Unit] with Detachable = Promise.attached(f)
...
if (p.detach()) p.setValue(())
  7. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  8. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  9. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  10. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  11. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  12. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  13. def interrupts[A](fs: Future[_]*): Promise[A]

    Create a promise that interrupts all of fs.

    Create a promise that interrupts all of fs. In particular: the returned promise handles an interrupt when any of fs do.

    See also

    interrupts(Future)

    interrupts(Future,Future)

  14. def interrupts[A](a: Future[_], b: Future[_]): Promise[A]

    Create a promise that interrupts a and b futures.

    Create a promise that interrupts a and b futures. In particular: the returned promise handles an interrupt when either a or b does.

    See also

    interrupts(Future)

    interrupts(Future*)

  15. def interrupts[A](f: Future[_]): Promise[A]

    Single-arg version to avoid object creation and take advantage of forwardInterruptsTo.

    Single-arg version to avoid object creation and take advantage of forwardInterruptsTo.

    See also

    interrupts(Future,Future)

    interrupts(Future*)

  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
    AnyRef → Any
  22. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  23. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  24. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

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