How to call a method after some specific interval of time in Java

Question

Here is the use case:

I am using Java (with Spring)

Once the user (through a web-app) confirms to the subscription, I want to send him an email exactly after 30 mins.

Now how to do this? Do I need a message broker? or something like ScheduledExecutorService? Do I need some sort of queue?

Please advise.

Answer 1

Can look into quartz scheduler for this.

By the way a common strategy is to send a bulk of all pending mails in bulk in every 30 minutes or so. Quartz can help in do that as well.