How to use EventListenerProvider the right way with Spring-Boot

Getting advice
1

Hello all,
I need some advice on the implementation of a use case.

I have developed a spring-boot application and use Keycloak as identity provider. I would like to get notified anytime a user successfully registers / logs in etc…

I have come so far to implement an EventlistenerProvider and EventlistenerProviderFactory. However, as far as I understand it I need to put the jar on my Keycloak servers provider folder so that they are registered.

Since I also use application logic in the EventListenerProvider or functions from the service layer I find it a bit strange to place the whole application there.

What would be the alternative or have I misunderstood something here?

2 Likes
2

The EventlistenerProvider will run inside Keycloak. If you need to execute some external logic in another application, it is recommended that you send a message to that application from your EventlistenerProvider implementation. One approach is to send an HTTP request. I’ve got some helpers to do that here GitHub - p2-inc/keycloak-events: Useful Keycloak event listener implementations and utilities.

3

Hey @xgp,

thanks for the quick response. Do you know, if i can use anything else instead of of HTTP requests? Is there any chance using messaging or similar technology?

4

You can use anything you want. There are various implementations out there for using things like MQTT, SQS, Kafka. E.g.:

It’s all based on what you put in your event listener implementation.

1 Like
5

Thanks mate, I think that solves my problem.

6

What’s the point of using eventListener if it can be done with just a helper class? Any specific reason why you are using eventListener?