Hexagonal architecture, also known as "ports and adapters architecture", is a great way to structure your application to make them more flexible and testable.
The modular and layered approach makes your application much more testable. You can write high-quality, focused tests for each part of your application: unit tests for the core domain, and integration tests for the ports and adapters.
The flexibility it offers is also great for minimizing the cost of moving (or "vendor lock-in"). When you change your mind about a particular technology, you just need to replace the ports and adapters that are relevant to that technology. It minimizes the blast radius of such a migration.
In the context of serverless, it's useful in situations where you have a lot of complex business logic, or are facing uncertainty about the compute platform you need to use. For example, if you need to switch from Lambda to Fargate, you just need to change the input adapter layer.
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24 авг 2023
