chain

MyChainOfCompletableFuture.java

        CompletableFuture<Void> chain = new CompletableFuture<>();

        chain.thenComposeAsync(nil -> createUser())
                .thenAcceptAsync(logNewUserId())
                .thenComposeAsync(nil ->
                        registerAddress()
                                .thenAcceptBothAsync(registerPaymentDetails(), (address, paymentDetailsSuccess) -> {
                                    System.out.println("Registered address was : " + address);
                                    System.out.println("Registered payment details success : " + paymentDetailsSuccess);
                                })
                )
                .thenComposeAsync(nil -> sendEmail())
                .thenAcceptAsync(result -> System.out.println("Email sent : " + result));

        chain.complete(null);

        Thread.sleep(2000);