Java-Quarkus-Reactive-CQRS-EventSourcing VS Vert.x

Source code you can find in GitHub repository. The main idea of this project is the implementation of Event Sourcing and CQRS using Java, Quarkus with reactive Vertx, Postgresql and Kafka. Previously have written same articles where implemented the same microservice using Go and EventStoreDB, and Spring,as written before, repeat here, think EventStoreDB is the best choice for event sourcing, but in real life at some projects we usually have business restrictions and for example usage of the EventStoreDB can be not allowed, in this case, think postgres and kafka is good alternative for implementing our own event store. Didn't write in this article about Event Sourcing and CQRS patterns, the best place to read is microservices.io,blog and documentation of this article is very good too, and as written in the previous article, highly recommend Alexey Zimarev "Hands-on Domain-Driven Design with .NET Core" book and also his blog.

https://vertx.io/

It's actively maintained with full time developers, performant, supports Kotlin out of the box, and has more features?

Hibernate Reactive integrates with Vert.x, but an extension allows to bridge to Project Reactor if wanted

Have you looked at Vert.x?

Explicitly so:

I really like Eclipse Vert.x... As both an Erlang dev and Java dev, it's a great synergy and soon to have support for Virtual Threads similar to BEAM.

There are many lean, popular, non-magical libraries in Java land. (https://quarkus.io/, https://vertx.io/, etc). Spring is a monster 😱. Its like comparing Kubernetes (written in Go) with some lean framework in another lang.

Eclipse Vert.x - Add amazing Async to any Java stack

Vert.X example: https://github.com/eclipse-vertx/vert.x/blob/master/src/main/java/examples/EventBusExamples.java#L106 (couldn't even find docs)

In fact, it builds on top of proven standards such as Eclipse MicroProfile or frameworks such as Vert.x or JAX‑RS.