Abstract dependencies

Projects depend on packages, internal ones or from 3rd parties. In all cases, your architecture should dictate what it needs and not evolve around a package, otherwise changing the dependency with another package and mocking it in tests could take unnecessary effort and time.

While it’s very easy to include a package in any file you need and start using it, time will show it’s painful to spread dependencies all over. Someday you’ll want to change a package because it’s not maintained anymore or you discover security issues which lead to loss of trust, or maybe you just want to experiment with another package.

This is where abstraction comes in, helping to decouple an implementation in your project, to set the rules which a dependency must follow. Each package has its own API, thus you need to wrap it by your API.

To show an example, I’ve chosen to integrate a validation package into Echo framework. The validator package requires you to tag your structs with its validation rules. Continue reading Abstract dependencies