Call another method after Spring MVC handler returns

Question

I have a requirement where I need to return some status/Long value from a rest controller and then execute code to send push notification.

@RequestMapping(value="/create")
public String createTicket() throws InterruptedException {
    // code to create ticket
    return "ticket created";
    // need to call sendPushNotifiction() after I return status
}

    public void sendPushNotifiction() throws InterruptedException {
    // code to send push notification
    System.out.println("Sent push notification successfully!!");    
}

Can some one please tell me how to achieve this? Is it possible to use Spring AOP for this? I don't think thread will guaranteed execution of sendPushNotifiction method only after return. So what are the ways to achieve this effectively? Thanks in advance

Answer 1

I think it might be a good use case for asynchronous processing. Spring has good support for it. Precisely, you need to

1. Annotate sendPushNotifiction with @Async.
2. Annotate some configuration class with @EnableAsync.
3. Call sendPushNotifiction() before the return statement. The execution flow will not wait for sendPushNotifiction to finish.

If it doesn't work, try coding sendPushNotifiction in a separate service.

Answer 2

Create another method which first calls the createTicket() method and then calls the sendPushNotifiction(). That will do the job. This the simplest way in my humble opinion.