com.codepoetics.protonpack.collectors

Class CompletableFutures

java.lang.Object

com.codepoetics.protonpack.collectors.CompletableFutures

public final class CompletableFutures
extends java.lang.Object

Method Summary

Modifier and Type	Method and Description
static <A> java.util.stream.Collector<java.util.concurrent.CompletableFuture<A>,?,java.util.concurrent.CompletableFuture<java.util.Optional<A>>>	reducing(java.util.function.BinaryOperator<A> reducer)
static <T,A> java.util.stream.Collector<java.util.concurrent.CompletableFuture<T>,?,java.util.concurrent.CompletableFuture<A>>	toFuture(java.util.function.Supplier<A> identitySupplier, java.util.function.BiFunction<T,A,A> reducer, java.util.function.BinaryOperator<A> combiner)
static <T,A,R> java.util.stream.Collector<java.util.concurrent.CompletableFuture<T>,?,java.util.concurrent.CompletableFuture<R>>	toFuture(java.util.function.Supplier<A> identitySupplier, java.util.function.BiFunction<T,A,A> reducer, java.util.function.BinaryOperator<A> combiner, java.util.function.Function<? super A,? extends R> completer)
static <T> java.util.stream.Collector<java.util.concurrent.CompletableFuture<T>,?,java.util.concurrent.CompletableFuture<java.util.List<T>>>	toFutureList() Collector which converts a stream of CompletableFuture<T> into a CompletableFuture<List<T>>

Methods inherited from class java.lang.Object

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

Method Detail

toFutureList

public static <T> java.util.stream.Collector<java.util.concurrent.CompletableFuture<T>,?,java.util.concurrent.CompletableFuture<java.util.List<T>>> toFutureList()

Collector which converts a stream of CompletableFuture<T> into a CompletableFuture<List<T>>

Type Parameters:

T - The type of value returned by each CompletableFuture in the stream.

Returns:

A CompletableFuture which completes with a list of all the values returned by futures in the stream, once they have all completed, or fails if any future in the stream fails.

reducing

public static <A> java.util.stream.Collector<java.util.concurrent.CompletableFuture<A>,?,java.util.concurrent.CompletableFuture<java.util.Optional<A>>> reducing(java.util.function.BinaryOperator<A> reducer)

toFuture

public static <T,A> java.util.stream.Collector<java.util.concurrent.CompletableFuture<T>,?,java.util.concurrent.CompletableFuture<A>> toFuture(java.util.function.Supplier<A> identitySupplier,
                                                                                                                                               java.util.function.BiFunction<T,A,A> reducer,
                                                                                                                                               java.util.function.BinaryOperator<A> combiner)

toFuture

public static <T,A,R> java.util.stream.Collector<java.util.concurrent.CompletableFuture<T>,?,java.util.concurrent.CompletableFuture<R>> toFuture(java.util.function.Supplier<A> identitySupplier,
                                                                                                                                                 java.util.function.BiFunction<T,A,A> reducer,
                                                                                                                                                 java.util.function.BinaryOperator<A> combiner,
                                                                                                                                                 java.util.function.Function<? super A,? extends R> completer)