service VS wild-workouts-go-ddd-example

Ultimate Service was useful for me. None of the "backend" concepts were new, but you get to see how Bill would layout/design an API-based service. If you're experienced you'll notice the opinionated choices he makes, and I found myself saying "Nah, I'm not sure I'd do it like that". I appreciated its use of Kubernetes and KIND as I'd never played with them before. How he uses Docker to spin up a DB instance for tests is pretty cool. There's a lot of copy & paste as you code along with him (you copy from the "finished project" and paste into your work in progress). The full example project is online at https://github.com/ardanlabs/service. You won't write all that code, and this version is newer than the one I did, but it gives you an idea of what you might learn.

So what can you do insted? For testing databases, setup a docker instance for tests (e.g. like in https://github.com/ardanlabs/service), or start an embedded-postgres daemon (see https://github.com/fergusstrange/embedded-postgres). For communication with external APIs, just pass the http.Client (either in context.Context or as a field on the struct). Then in tests, you can override the http.Client.Transport func.

Take a look at https://github.com/ardanlabs/service from Bill Kennedy. You can probably simplify the structure a bit since your project is minimal, but that repo is gold.

Checkout https://github.com/ardanlabs/service for inporation. Tip: try to avoid creating a service package with all services, a domain package with all domain structs, etc.

Or go through this repo https://github.com/ardanlabs/service

I've seen this handler modification and wrapping pattern in Ardan Labs' service repository. https://github.com/ardanlabs/service/tree/master/foundation/web

https://github.com/ardanlabs/service This is something which I really like and has taken into account a lot of engineering decisions.

Take a look at: https://github.com/ThreeDotsLabs/wild-workouts-go-ddd-exampl...

(I’m one of the authors.)

This project shows how to apply more complex patterns popular in business applications while staying true to the Go ideas, and not copying them blindly from Java.

In the Go community, you’ll often hear people say „just keep things simple” beats all patterns and is all you need. This may be true if you write a CLI tool or a small library, but if you have a team maintaining a big application, some patterns are super helpful.

Here is a reference implementation by the same authors of the blog post you referenced: https://github.com/ThreeDotsLabs/wild-workouts-go-ddd-example/tree/master/internal/trainer.

In this case I recommend Three Dots Labs blog and Ardan Labs courses and blog posts.

As a rather new developer, I'm ashamed to admit that I struggle with this. I've seen the Dave Cheney writeup about it and I agree with your reasoning, but sometimes I end up in situations like this, where they wrote a server utility, put it into the common package and imported it into the services that need it. The issue I have is the organization of it all because the folder structure seems to make a clear separation of the core services from the utility package. If you have any ideas or tips to help avoid it, that'd be awesome!

Clean architecture is not tied to some specific paradigm. It's a way of thinking about programs that is common to almost every mature developer. Many developers use it without even knowing the name - they just came to it by themselves through many tries and errors. There is a good free book about using it in Go, called Go with the Domain if you interested.

Wild Workouts should match your needs: https://github.com/ThreeDotsLabs/wild-workouts-go-ddd-example

For Event-Driven / DDD / Microservice projects, take a look at this Github org https://github.com/ThreeDotsLabs and their blog detailing the techniques used https://threedots.tech .

Nice job at taking a stab at DDD in Go! You may want to check out https://github.com/ThreeDotsLabs/wild-workouts-go-ddd-example for some inspiration and learning around DDD and Go.