Class UncertainAsyncOp<T, E>

Readonly[toStringTag]

error

• get error(): E

• Retrieves the error returned by the async operation. Only valid if AsyncOpBase.isError returns true.

  Returns E

  Return error of the async operation.

identifier

• get identifier(): object

• An opaque identifier that uniquely identifies this AsyncOp on the system. The returned is not specified, but guaranteed to be the same during runtime.

  Returns object

isComplete

• get isComplete(): boolean

• Returns true if the async operation has completed.

  Returns boolean

isFailed

• get isFailed(): boolean

• Returns true if the async operation has failed.

  Returns boolean

isPending

• get isPending(): boolean

• Returns true if the async operation is pending completion or failure.

  Returns boolean

value

• get value(): T

• Retrieves the value returned by the async operation. Only valid if AsyncOpBase.isComplete returns true.

  Returns T

  Return value of the async operation.

blockUntilComplete

• blockUntilComplete(): AsyncOp<T, E>

• Blocks the caller thread until the AsyncOp completes or fails.

  Returns AsyncOp<T, E>

catch

• catch(onError): this

• Attaches a failure handler to the async op.

  Parameters

  • onError: ((error: E) => void)

    The callback to be called as continuation.

    • • (error): void

      • Parameters

        • error: E

        Returns void

  Returns this

  this

fail

• fail(onError): this

• Attaches a failure handler to the async op.

  Parameters

  • onError: ((error: E) => void)

    The callback to be called as continuation.

    • • (error): void

      • Parameters

        • error: E

        Returns void

  Returns this

  this

finally

• finally(onFinally?): this

• Attaches a finalization handler to the async op.

  Parameters

  • OptionalonFinally: (() => void)

    The callback to be called in case of success or failure.

    • • (): void

      • Returns void

  Returns this

  this

isEqual

• isEqual(identifier): boolean

• Determines if this async op matches the specified identifier.

  Parameters

  • identifier: object

  Returns boolean

then

• then(onComplete, onError): this

• Attaches a continuation to the async op.

  Parameters

  • onComplete: ((result: T) => void)

    The callback to be called as continuation.

    • • (result): void

      • Parameters

        • result: T

        Returns void

  • onError: ((error: E) => void)

    The callback to be called as error continuation.

    • • (error): void

      • Parameters

        • error: E

        Returns void

  Returns this

  this
• then(onComplete): this

• Attaches a continuation to the async op.

  Parameters

  • onComplete: ((result: T, error?: E, identifier?: object) => void)

    The callback to be called as continuation.

    • • (result, error?, identifier?): void

      • Parameters

        • result: T
        • Optionalerror: E
        • Optionalidentifier: object

        Returns void

  Returns this

  this