spring-architecture-verifie.../docs/architecture/adr-payment-boundary.md

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Payment Boundary Decision Record

Context

In developing the architecture for the payment processing system, our objective is to ensure a clear separation between the application logic and the payment gateways. This boundary will help maintain a clean architecture and allow for easier testing and maintainability.

Decision

We have decided to implement a port and adapter pattern where the payment gateway is accessed via a defined interface (port) rather than being directly referenced in the domain model. This ensures that our domain logic remains agnostic of the specific implementations of payment gateways.

Alternatives

  1. Direct coupling with the payment gateway: This approach could lead to tight coupling and hinder maintainability and testability.
  2. Abstracting payment logic into a service layer: While this maintains separation, it increases complexity and could introduce overhead.

Consequences

  • By adhering to the port and adapter pattern, we ensure our domain model remains clean and focused on business logic.
  • Changes in payment gateway implementations can be managed without affecting the domain logic, leading to improved agility.