Implementing use cases with input ports
In the hexagonal architecture, there is this idea about driving and driven operations. We’ve seen that such classification is also valid to determine which actors interact with the hexagon system. Driving actors are the ones who send requests to the application, while the driven actors represent the external components accessed by the application. We use input ports – also known as primary ports – to allow the communication flow between driving actors and the driving operations exposed by a hexagonal system. Use cases tell us what behaviors the application will support, while input ports tell us how such behaviors will be performed.
Input ports play an integrating role because they are like pipes that allow the data to flow from driving actors when they hit the hexagonal system through one of its adapters on the Framework hexagon. In the same vein, input ports provide the pipes for communication with business rules from...