Package org.bitcoinj.base.internal

Class FutureUtils

java.lang.Object

org.bitcoinj.base.internal.FutureUtils

public class FutureUtils
extends Object

Utilities for CompletableFuture.

Note: When the bitcoinj migration to CompletableFuture is finished this class will either be removed or its remaining methods changed to use generic CompletableFutures.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	FutureUtils.ThrowingSupplier<T>	Subinterface of Supplier for Lambdas which throw exceptions.

Constructor Summary

Constructors

Constructor	Description
FutureUtils()

Method Summary

Modifier and Type	Method	Description
static <T> CompletableFuture<List<T>>	allAsList(List<? extends CompletionStage<? extends T>> stages)	Note: When the migration to CompletableFuture is complete this routine will either be removed or changed to return a generic CompletableFuture.
static <T> CompletableFuture<T>	failedFuture(Throwable t)	Can be replaced with CompletableFuture.failedFuture(Throwable) in Java 9+.
static <T> CompletableFuture<List<T>>	successfulAsList(List<? extends CompletionStage<? extends T>> stages)	Note: When the migration to CompletableFuture is complete this routine will either be removed or changed to return a generic CompletableFuture.

Methods inherited from class java.lang.Object

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

Constructor Details

FutureUtils

public FutureUtils()

Method Details

allAsList

public static <T> CompletableFuture<List<T>> allAsList(List<? extends CompletionStage<? extends T>> stages)

Note: When the migration to CompletableFuture is complete this routine will either be removed or changed to return a generic CompletableFuture.

Type Parameters:

T - the result type

Parameters:

stages - A list of CompletionStages all returning the same type

Returns:

A CompletableFuture that returns a list of result type

successfulAsList

public static <T> CompletableFuture<List<T>> successfulAsList(List<? extends CompletionStage<? extends T>> stages)

Note: When the migration to CompletableFuture is complete this routine will either be removed or changed to return a generic CompletableFuture.

Type Parameters:

T - the result type

Parameters:

stages - A list of CompletionStages all returning the same type

Returns:

A CompletableFuture that returns a list of result type

failedFuture

public static <T> CompletableFuture<T> failedFuture(Throwable t)

Can be replaced with CompletableFuture.failedFuture(Throwable) in Java 9+.

Type Parameters:

T - the future's return type

Parameters:

t - Exception that is causing the failure

Returns:

a failed future containing the specified exception