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Parallel collection processing with customizable thread pools

There is a newer version: 3.2.0

package com.pivovarit.collectors;

import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.function.Function;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;

interface CompletionStrategy extends Function>, Stream> {

    static  CompletionStrategy unordered() {
        return futures -> StreamSupport.stream(new CompletionOrderSpliterator<>(futures), false);
    }

    static  CompletionStrategy ordered() {
        return futures -> futures.stream().map(CompletableFuture::join);
    }
}