How to use return value from ExecutorService

Question

I am running a for loop under ExecutorService (which sends emails)

If any of the return type is fail , i need to return return resposne as \"Fail\" or else i need to

Answer 1

Call your getMYInfo(i) in Callable, submit this callable to executor, then wait for competition of Future.

private static ExecutorService emailExecutor = Executors.newSingleThreadExecutor();

public static void main(String[] args) {
    getData();
}

private static void getData() {
    List> futures = new ArrayList<>();
    for (int i = 0; i < 2; i++) {
        final Future future = emailExecutor.submit(new MyInfoCallable(i));
        futures.add(future);
    }
    for (Future f : futures) {
        try {
            System.out.println(f.get());
        } catch (InterruptedException | ExecutionException ex) {
        }
    }
}

public static String getMYInfo(int i) {
    String somevav = "success";
    if (i == 0) {
        somevav = "success";
    } else {
        somevav = "fail";
    }
    return somevav;
}

private static class MyInfoCallable implements Callable {

    int i;

    public MyInfoCallable(int i) {
        this.i = i;
    }

    @Override
    public String call() throws Exception {
        return getMYInfo(i);
    }

}