Future Chain Coordination Report

Chain transformations onto an already-completed future and classify the result.

Future Chain Coordination Report

FutureChainCoordinationReport.java

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;

public class FutureChainCoordinationReport {
    public static void main(String[] args) throws InterruptedException, ExecutionException {
        int seed = ;
        CompletableFuture<Integer> future = CompletableFuture
            .completedFuture(seed)
            .thenApply(value -> value * 2)
            .thenApply(value -> value + 1);

        int result = future.get();
        String status = result <= 3 ? "small" : result <= 9 ? "mid" : "large";

        System.out.println("seed=" + seed + " result=" + result + " status=" + status);
    }
}

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;

public class FutureChainCoordinationReport {
    public static void main(String[] args) throws InterruptedException, ExecutionException {
        int seed = ;
        CompletableFuture<Integer> future = CompletableFuture
            .completedFuture(seed)
            .thenApply(value -> value * 2)
            .thenApply(value -> value + 1);

        int result = future.get();
        String status = result <= 3 ? "small" : result <= 9 ? "mid" : "large";

        System.out.println("seed=" + seed + " result=" + result + " status=" + status);
    }
}

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;

public class FutureChainCoordinationReport {
    public static void main(String[] args) throws InterruptedException, ExecutionException {
        int seed = ;
        CompletableFuture<Integer> future = CompletableFuture
            .completedFuture(seed)
            .thenApply(value -> value * 2)
            .thenApply(value -> value + 1);

        int result = future.get();
        String status = result <= 3 ? "small" : result <= 9 ? "mid" : "large";

        System.out.println("seed=" + seed + " result=" + result + " status=" + status);
    }
}

completable future A `CompletableFuture` that is already completed runs each `thenApply` stage in order, so a chain stays deterministic and its final value can be reported.