Class/Object

com.thoughtworks.binding

JsPromiseBinding

Related Docs: object JsPromiseBinding | package binding

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final class JsPromiseBinding[A] extends Binding[Option[Either[Any, A]]]

A wrapper that wraps a scala.scalajs.js.Thenable to a com.thoughtworks.binding.Binding.

Author:

杨博 (Yang Bo) <[email protected]>

Source
JsPromiseBinding.scala
Example:

  1. This JsPromiseBinding will cache the result of the thenable. Given a scala.scalajs.js.Thenable that will be delay executed.

    import scala.scalajs.js
var upstreamEvaluationCount1 = 0
val delayedThenable = js.Promise.resolve[Unit](()).`then`[Double] { case () =>
  upstreamEvaluationCount1 += 1
  math.random
}

    The execution will not be performed right now.

    val jsPromiseBinding = JsPromiseBinding(delayedThenable)
upstreamEvaluationCount1 should be(0)

    When there are multiple usages of jsPromiseBinding, each usage should be triggered with the same value.

    var evaluationCount1 = 0
var evaluationCount2 = 0
var evaluationCount3 = 0
val usage1 = Binding {
  jsPromiseBinding.bind match {
    case Some(Right(value)) =>
      evaluationCount1 += 1
    case _ =>
  }
}
val usage2 = Binding {
  jsPromiseBinding.bind match {
    case Some(Right(value)) =>
      evaluationCount2 += 1
      val usage3 = Binding {
        jsPromiseBinding.bind match {
          case Some(Right(value)) =>
            evaluationCount3 += 1
          case _ =>
        }
      }
      val _ = usage1.bind
      usage3.bind
    case _ =>
  }
}
usage2.watch()
upstreamEvaluationCount1 should be(0)
evaluationCount1 should be(0)
evaluationCount2 should be(0)
evaluationCount3 should be(0)

    And each usage should be triggered once and only once.

    delayedThenable.toFuture.map { _ =>
  upstreamEvaluationCount1 should be(1)
  evaluationCount1 should be(1)
  evaluationCount2 should be(1)
  evaluationCount3 should be(1)
}
Linear Supertypes
Binding[Option[Either[Any, A]]], AnyRef, Any
Type Hierarchy
Ordering
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  2. By Inheritance
Inherited
  1. JsPromiseBinding
  2. Binding
  3. AnyRef
  4. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new JsPromiseBinding(promise: Promise[A])

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  2. new JsPromiseBinding(thenable: Thenable[A])

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Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any

  3. def +(other: String): String

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    Implicit information
    This member is added by an implicit conversion from JsPromiseBinding[A] to any2stringadd[JsPromiseBinding[A]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd

  4. def ->[B](y: B): (JsPromiseBinding[A], B)

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    Implicit information
    This member is added by an implicit conversion from JsPromiseBinding[A] to ArrowAssoc[JsPromiseBinding[A]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()

  5. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  6. def addChangedListener(listener: ChangedListener[Option[Either[Any, A]]]): Unit

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    Attributes
    protected
    Definition Classes
    JsPromiseBinding → Binding

  7. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

  8. final macro def bind: Option[Either[Any, A]]

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    Returns the current value of this Binding and marks the current @dom method depend on this Binding.

    Returns the current value of this Binding and marks the current @dom method depend on this Binding.

    Each time the value changes, in the current @dom method, all code after the current bind expression will be re-evaluated if the current @dom method is watching. However, code in current @dom method and before the current bind expression will not be re-evaluated. The above rule is not applied to DOM nodes created by XHTML literal. A bind expression under a DOM node does not affect siblings and parents of that node.

    Definition Classes
    Binding
    Note

    This method must be invoked inside a @dom method body or a Binding { ... } block..

  9. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  10. def ensuring(cond: (JsPromiseBinding[A]) ⇒ Boolean, msg: ⇒ Any): JsPromiseBinding[A]

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    Implicit information
    This member is added by an implicit conversion from JsPromiseBinding[A] to Ensuring[JsPromiseBinding[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring

  11. def ensuring(cond: (JsPromiseBinding[A]) ⇒ Boolean): JsPromiseBinding[A]

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    Implicit information
    This member is added by an implicit conversion from JsPromiseBinding[A] to Ensuring[JsPromiseBinding[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring

  12. def ensuring(cond: Boolean, msg: ⇒ Any): JsPromiseBinding[A]

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    Implicit information
    This member is added by an implicit conversion from JsPromiseBinding[A] to Ensuring[JsPromiseBinding[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring

  13. def ensuring(cond: Boolean): JsPromiseBinding[A]

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    Implicit information
    This member is added by an implicit conversion from JsPromiseBinding[A] to Ensuring[JsPromiseBinding[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring

  14. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  15. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  16. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  17. def formatted(fmtstr: String): String

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    Implicit information
    This member is added by an implicit conversion from JsPromiseBinding[A] to StringFormat[JsPromiseBinding[A]] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()

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

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    Definition Classes
    AnyRef → Any

  19. def hashCode(): Int

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    Definition Classes
    AnyRef → Any

  20. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

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

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    Definition Classes
    AnyRef

  22. final def notify(): Unit

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    Definition Classes
    AnyRef

  23. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

  24. def removeChangedListener(listener: ChangedListener[Option[Either[Any, A]]]): Unit

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    Attributes
    protected
    Definition Classes
    JsPromiseBinding → Binding

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

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    Definition Classes
    AnyRef

  26. def toString(): String

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    Definition Classes
    AnyRef → Any

  27. final def unwatch(): Unit

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    Disable automatic recalculation.

    Disable automatic recalculation.

    Definition Classes
    Binding
    Annotations
    @inline()
    Note

    This method is recursive, which means that the dependencies of this Binding will be unwatched as well.

  28. def value: Option[Either[Any, A]]

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    Returns the current value of this Binding

    Returns the current value of this Binding

    Attributes
    protected
    Definition Classes
    JsPromiseBinding → Binding
    Note

    This method must not be invoked inside a @dom method body or a Binding { ... } block..

  29. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  32. final def watch(): Unit

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    Enable automatic recalculation.

    Enable automatic recalculation.

    You may invoke this method more than once. Then, when you want to disable automatic recalculation, you must invoke unwatch same times as the number of calls to this method.

    Definition Classes
    Binding
    Annotations
    @inline()
    Note

    This method is recursive, which means that the dependencies of this Binding will be watched as well.

  33. def →[B](y: B): (JsPromiseBinding[A], B)

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    Implicit information
    This member is added by an implicit conversion from JsPromiseBinding[A] to ArrowAssoc[JsPromiseBinding[A]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Deprecated Value Members

  1. final macro def each: Option[Either[Any, A]]

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    Definition Classes
    Binding
    Annotations
    @deprecated
    Deprecated

    (Since version 7.0.0) Use bind instead

Inherited from Binding[Option[Either[Any, A]]]

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from JsPromiseBinding[A] to any2stringadd[JsPromiseBinding[A]]

Inherited by implicit conversion StringFormat from JsPromiseBinding[A] to StringFormat[JsPromiseBinding[A]]

Inherited by implicit conversion Ensuring from JsPromiseBinding[A] to Ensuring[JsPromiseBinding[A]]

Inherited by implicit conversion ArrowAssoc from JsPromiseBinding[A] to ArrowAssoc[JsPromiseBinding[A]]

Ungrouped