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Completable future example

Pragya Keshap answered on February 26, 2023 Popularity 7/10 Helpfulness 2/10

answer Completable future example

Completable future example

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   public  CompletableFuture<Void> sendReminderToEmployee() {

        Executor executor=Executors.newFixedThreadPool(5);

        CompletableFuture<Void> voidCompletableFuture = CompletableFuture.supplyAsync(() -> {
            System.out.println("fetchEmployee : " + Thread.currentThread().getName());
            return EmployeeDatabase.fetchEmployees();
        },executor).thenApplyAsync((employees) -> {
            System.out.println("filter new joiner employee  : " + Thread.currentThread().getName());
            return employees.stream()
                    .filter(employee -> "TRUE".equals(employee.getNewJoiner()))
                    .collect(Collectors.toList());
        },executor).thenApplyAsync((employees) -> {
            System.out.println("filter training not complete employee  : " + Thread.currentThread().getName());
            return employees.stream()
                    .filter(employee -> "TRUE".equals(employee.getLearningPending()))
                    .collect(Collectors.toList());
        },executor).thenApplyAsync((employees) -> {
            System.out.println("get emails  : " + Thread.currentThread().getName());
            return employees.stream().map(Employee::getEmail).collect(Collectors.toList());
        },executor).thenAcceptAsync((emails) -> {
            System.out.println("send email  : " + Thread.currentThread().getName());
            emails.forEach(EmployeeReminderService::sendEmail);
        },executor);
        return voidCompletableFuture;
    }

Popularity 7/10 Helpfulness 2/10 Language java

Source: Grepper

Tags: completable-future java

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Contributed on Feb 26 2023

Pragya Keshap

0 Answers Avg Quality 2/10

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