35 lines
1.0 KiB
Java
35 lines
1.0 KiB
Java
// concurrent/Batter.java
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// (c)2017 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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import java.util.concurrent.*;
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import onjava.Nap;
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public class Batter {
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static class Eggs {}
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static class Milk {}
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static class Sugar {}
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static class Flour {}
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static <T> T prepare(T ingredient) {
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new Nap(100);
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return ingredient;
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}
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static <T> CompletableFuture<T> prep(T ingredient) {
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return CompletableFuture
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.completedFuture(ingredient)
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.thenApplyAsync(Batter::prepare);
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}
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public static CompletableFuture<Batter> mix() {
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CompletableFuture<Eggs> eggs = prep(new Eggs());
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CompletableFuture<Milk> milk = prep(new Milk());
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CompletableFuture<Sugar> sugar = prep(new Sugar());
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CompletableFuture<Flour> flour = prep(new Flour());
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CompletableFuture
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.allOf(eggs, milk, sugar, flour)
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.join();
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new Nap(100); // Mixing time
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return
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CompletableFuture.completedFuture(new Batter());
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}
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}
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