GOLANG UUID GENERATOR GENERATOR
GOLANG UUID GENERATOR UPDATE
GOLANG UUID GENERATOR CODE
GOLANG UUID GENERATOR SERIES

GOLANG UUID GENERATOR CODE

In hindsight, I adopted some bad patterns when I first started to code Go. Just a quick introduction and one of the more prominent changes in the overhaul of the code and infrastructure tools for the blog series! 4. This is not meant to be an in-depth explanation of Go modules. Replace /callistaenterprise/goblog/common =>. Luckily, the go modules tools allows us to declare an override for how dependencies are resolved using the replace directive.įor local development, one can add this one-liner to go.mod in order to resolve the common module from a relative path on our local file-system instead: If that sounds rather inconvenient when developing - it is. This means that any local changes performed in /common won’t affect a locally built accountservice before the changes to common has been pushed to github. While we have the common folder in the root of our checked-out code, we’re actually pulling in the code for /callistaenterprise/goblog/common/model directly from the latest published commit on the master branch from github. Note the /callistaenterprise/goblog/common/model. The listing above shows us that the model package of our accountservice is importing our common/model package, which in it’s turn is pulling in /twinj/uuid and so on. callistaenterprise/goblog/accountservice/internal/pkg/model We can ask the go tools which dependency that’s pulling in that indirect dependency.

GOLANG UUID GENERATOR GENERATOR

dependencies of your direct dependencies.įor example, we can see that the UUID generator library /myesui/uuid v1.0.0 is declared as an indirect dependency. libraries you explicitly have imports for in your code) and also indirect dependencies, i.e. The neat thing here is that the go tools have scanned your source code and generated the require block listing all direct (e.g. It starts by specifying the unique identifier of your module, which by convention usually is the absolute path to it’s source-control repository and possibly subfolder. The go.mod file has been generated by the go tools. Module /callistaenterprise/goblog/accountservice

GOLANG UUID GENERATOR SERIES

Using go modules also has the upside of not forcing your codebase to live beneath a GOPATH anymore, so now one can just clone the source of this blog series to any folder and start building it.Īdding go module support is quite easy. Go modules was introduced in Go 1.11 as the official dependency management tool and I personally am quite happy with it given its relative simplicity and useful toolset. The first major change to the codebase is making all our microservices as well as the common code into go modules. (Please note that I’m not following all the recommendations in the standard project layout to the letter) 3. The new layout also affects build scripts, Dockerfiles etc which will be revisited later as well. The root folder for each microservice is now much cleaner, typically having only a Makefile and the new go.mod and go.sum files from go modules. Note the placeholder which will be replaced per-service, for example cmd/accountservice/main.go.īy standardizing where to find the main.go file, it makes it easier to write clean build scripts as well as adding additional executables related to the microservice at hand - migrations for example. The finished source code can be cloned from github: There’s also a whole bunch of supporting services (database, message broker, monitoring tools) omitted from the figure that we’ll revisit in Part 17. Just a quick recap on the make-believe system landscape consisting of five discrete microservices deployed on Docker in swarm mode:

GOLANG UUID GENERATOR UPDATE

In this blog post, we’ll update our core Go-based microservices to use more idiomatic coding style, go modules, a new project structure, revamped configuration, a new HTTP router and revised unit-testing.

In this and an upcoming part of the blog series, we’ll do a major overhaul of both our Go code and how we write, build and deploy our microservices to Docker Swarm. Read on for a primer on go modules, go-chi, testify and other Go-related stuff I’ve come to really like and adopt. I’ve come to realize that the Go code and how the microservices are built and deployed were long due a substantial overhaul. What was a given three years ago when I started working on the material used in this blog series has in many ways changed or evolved and I’ve also learnt a lot on the way. Go Microservices blog series, part 16 - It's 2019, time for a code overhaul!

Golang uuid generator