Learn Spring Events step-by-step | ApplicationListener | ApplicationEventPublisher | @EventListener

In this lesson, we will learn about spring events. You can create a spring event by extending it to a class called ApplicationEvent. You can see all the internal Spring Event classes either extends to ApplicationEvent or ApplicationContextEvent.

You can create a publisher that triggers an event. Your publisher shouldn't have any tight coupling with listeners and, should publish the needed event to notify the listerners.

To create a Listener in spring you can use ApplicationListener class and, to fire an event in spring you can use ApplicationEventPublisher class. We can use the publishEvent method of ApplicationEventPublisher to publish an event.

Make sure all your application listeners are by default synchronous. We will learn how to make them async in the next lesson.

Timestamp:
00:00:00 - introduction
00:03:50 - Events in UI
00:15:38 - Server Side Events - concept
00:20:02 - Why we need Events ?
00:37:38 - Creating a Spring Event class
00:43:27 - Publishing a Spring Event
00:45:48 - Let's create a spring listner
00:56:08 - @EventListner
01:03:11 - spring events hands-on

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