How to properly microservice axon?

Imported from Google Groups
1

Hi, I’m trying to build simple project management tool (just for edu purposes)

I’d like to have such services:

  1. User service - user aggregate
  2. Project service - project aggregate, task aggregate
  3. Reporting service - no idea what’s supposed to go there yet
  4. Admin service -same as reporting

Each service should be separated into two separate ones, one for commands, 2nd one for query

I’m wondering, how can I properly setup axon on each service so that:

  1. It’s safe to scale it with kubernetes
  2. e.g. Project service can receive aggregate events from user service

Because I plan to use kubernetes and rabbitmq (or kafka) I don’t need distributed command bus.
I think i need distributed event bus, so that when some aggregate accepts command and sends event it’s received by corresponding query service.
How can I achieve that?

I’d like to have some websockets for the UI. I shouldn’t be listening directly on the event queue as these updates might be not consumed yet. I should probably broadcast new messages once the query part saves event to its database. Is there anything in Axon that could help me out?

2

btw, if anyone of you have some examples then I’d be delighted

3

Have you checked our webinars? This one especially could be interesting:
https://www.youtube.com/watch?v=3NmMDUlPkgw

Check out our channel for more how-to guides: https://www.youtube.com/c/AxonIQ

Because I plan to use kubernetes and rabbitmq (or kafka) I don’t need distributed command bus.

I don’t really see how they’re related. Kafka and Rabbit are good for pub-sub, but quite inefficient for routing commands. I recommend using the distributed command bus with this setup.

Regarding the UI, take a look at our new subscription queries. They’re probably what you’re looking for: https://www.youtube.com/watch?v=b3NLDxa6MWE

Cheers,

Allard