CAP VS NServiceBus

You might want to implement the outbox pattern. There’s a decent library that’ll help and is really easy to integrate. In particular, I’d look at using the transaction functionality

This might be of interest https://cap.dotnetcore.xyz/

There are many libraries in .NET that helps you implementing the outbox pattern like: MassTransit, NServiceBus, CAP. Talking about idempotency, a special mention to a specific lib from a big friend that runs on top of CAP which is called Ziggurat.

CAP is your friend https://github.com/dotnetcore/CAP

Correct but I would actually consider CAP instead. The primary reason is that CAP implements the outbox pattern out-of-box where you would need to implement this yourself with Hangfire.

This is an implementation of pub/sub. The publisher is on a separate project. The message broker is Azure Service Bus. We use NServiceBus for code implementation. I use rabbitMQ broker for local tests. Nothing I can do about the tech stack. This is more of a high level single project structure review 😅

There are many libraries in .NET that helps you implementing the outbox pattern like: MassTransit, NServiceBus, CAP. Talking about idempotency, a special mention to a specific lib from a big friend that runs on top of CAP which is called Ziggurat.

Spring.Messaging.* - NServiceBus or MassTransit.