External Dependencies

What is the most difficult stuff to manage in software? I would say external dependencies.

🏗 As soon as we connect to an external system. Being a database, a queue, or an API, we get a dependency that we must maintain for the system's life.

🤔 If the dependency change, we are forced to change our software because we don't have control.

🎓 Worse still, if we blend the dependency with our business code. Then we are in for a world of pain.

Don't be that guy. Do it right instead.

✔ Use interfaces to services in your business logic

✔ Make a bridge towards external services, so changes are contained.

✔ Use ports and adapters style architecture to protect your code.