org.netbeans.html.boot.spi

Class Fn.Promise

java.lang.Object

org.netbeans.html.boot.spi.Fn.Promise

Enclosing class:

Fn

public abstract static class Fn.Promise
extends java.lang.Object

Represents a JavaScript Promise in Java. A promise is a microtask to be executed as soon as current "runnable" finishes. At that moment the Fn.Promise.compute() method is invoked and the result is remebered.

Since:

1.8

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Promise(Fn.Presenter p) Constructor for subclasses.

Method Summary

Modifier and Type	Method and Description
protected abstract java.lang.Object	compute() Implement in subclasses to perform the "promised" Java operation.
java.lang.Object	schedule() Schedules the promise invocation and returns JavaScript representation of the promise.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Promise

protected Promise(Fn.Presenter p)

Constructor for subclasses.

Parameters:

p - the presenter to resolve promise with

Since:

1.8

Method Detail

schedule

public final java.lang.Object schedule()

Schedules the promise invocation and returns JavaScript representation of the promise.

Returns:

JavaScript Promise object

Since:

1.8

compute

protected abstract java.lang.Object compute()
                                     throws java.lang.Throwable

Implement in subclasses to perform the "promised" Java operation. Once this method finishes the system resolves the scheduled promise.

Returns:

the value to resolve the promise with

Throws:

java.lang.Throwable - the exception to resolve the promise with

Since:

1.8