Spring Boot @Async method in controller is executing synchronously

Question

My [basic] Spring Boot application accepts a request from the browser, sent via jQuery.get() and is supposed to immediately receive a response - such as \"y

Answer 1

As code sample for @dave-syer answer:

This works asynchronously:

private void longRunning() {
    try {
        log.info("wait 3 seconds");
        Thread.sleep(3000);
    } catch (InterruptedException e1) {
    }
    log.info("done");               
}

@Async  
@Override
public void doWork() {
    longRunning();
}

But this doesn't:

@Async
private void longRunning() {
    try {
        log.info("wait 3 seconds");
        Thread.sleep(3000);
    } catch (InterruptedException e1) {
    }
    log.info("done");               
}

@Override
public void doWork() {
    longRunning();
}