aoa-port-adapter-refactor

To decouple domain logic from infrastructure dependencies, you extract concrete dependencies into narrow ports and corresponding adapters. This approach isolates external services behind boundaries, preserving behavior while making the architecture clearer and testing easier.

The best way to refactor a service layer directly accessing a database driver is to extract the concrete dependency into a clean repository port and an adapter. This separates the domain logic from the infrastructure concern, decoupling the modules effectively.

Tight coupling makes testing difficult because core modules directly depend on concrete infrastructure, preventing isolated unit testing. When external services leak into core logic, you cannot verify behavior without spinning up the actual dependencies, hindering clarity and limiting changes.

To identify ports and adapters during a bounded refactor, you detect concrete dependencies that leak into core modules. You then generate adapters to isolate these infrastructure concerns behind narrow ports while keeping changes limited to the targeted area.

Yes, you can isolate external dependencies without breaking behavior by applying a bounded refactor. This approach keeps changes limited to the targeted area and validates behavior stability, ensuring the refactor remains bounded while introducing clean ports and adapters.