org.eclipse.microprofile.fault.tolerance.tck.asynchronous

Class CompletableFutureHelper

java.lang.Object

org.eclipse.microprofile.fault.tolerance.tck.asynchronous.CompletableFutureHelper

public class CompletableFutureHelper
extends Object

Author:

Ondrej Mihalyi

Method Summary

Modifier and Type	Method and Description
static <U> CompletableFuture<U>	failedFuture(Throwable ex) Creates a future completed with a supplied exception.
static <U> CompletableFuture<U>	toCompletableFuture(CompletionStage<U> stage) Returns a future that is completed when the stage is completed and has the same value or exception as the completed stage.

Methods inherited from class java.lang.Object

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

Method Detail

failedFuture

public static <U> CompletableFuture<U> failedFuture(Throwable ex)

Creates a future completed with a supplied exception. Equivalent to CompletableFuture.failedFuture available since Java 9 but not in Java 8.

Type Parameters:

U - The type of the future result

Parameters:

ex - The exception to finish the result with

Returns:

A future completed with the a supplied exception ex

toCompletableFuture

public static <U> CompletableFuture<U> toCompletableFuture(CompletionStage<U> stage)

Returns a future that is completed when the stage is completed and has the same value or exception as the completed stage. It's supposed to be equivalent to calling CompletionStage.toCompletableFuture() but works with any CompletionStage and doesn't throw UnsupportedOperationException.

Type Parameters:

U - The type of the future result

Parameters:

stage - Stage to convert to a future

Returns:

Future converted from stage