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Write Stable Code using Coupling Metrics

Are you tired of changing one part of a system, only to have another part break? Write stable code! Writing stable code can seem impossible. Trying to keep things from breaking can be a nightmare if you’re unaware of how your system is coupled. Understanding Afferent & Efferent coupling can guide you into insights about your software architecture & design. YouTube Check out my YouTube channel where I post all kinds of content that accompanies my posts including this video showing everything that is in this post. Coupling To illustrate coupling, I’m going to talk about it at a project/package/boundary level. You… Read More »Write Stable Code using Coupling Metrics

Avoiding a Big Ball of Mud

How can you prevent creating a big ball of mud? Understanding your boundaries and the coupling between them. How do you communicate between boundaries within a monolith? Coupling is the enemy! Define contracts of functionality that are exposed to other boundaries. This hides implementation. If you want to be coupled less, go even further with asynchronous messaging. YouTube Check out my YouTube channel where I post all kinds of content that accompanies my posts including this video showing everything that is in this post. Direction of Dependencies A lot of people are using onion architecture or a layered approach to writing their… Read More »Avoiding a Big Ball of Mud

Messaging Commands & Events Explained!

In service oriented architecture (including microservices) that leverage messaging, you’re going to run into both types of messages: Commands & Events. What’s the difference between Commands & Events? When should you use a command and when should use an event? YouTube Check out my YouTube channel where I post all kinds of content that accompanies my posts including this video showing everything that is in this post. What’s a Command? Commands are messages with the intent to change the state of the system. They are actions to be performed that have side effects. They may be created by an end-user… Read More »Messaging Commands & Events Explained!