First of all, if you didn't read the previous post, please read before you jump into this section first part Hexagonal Architecture: Introduction Part I Today we are going to discuss about hexagonal archittecture with use case There three basic components which hexagonal architecture talks about. Application (Domain Model) Ports Adapter Application Hexagon is the application itself. Inside the application we just have the things that are important for the business problem that the application is trying to solve. Ports Ports are the medium through which business logic is accessed.Port is a use case boundary i.e. Ports correspond to use-cases in the application Adapters An adapter translates between a specific technology and a technology free port. Adapters is medium which serve the purpose of transforming the communication between various external actors and application logic through port. In hexagonal architecture all actors interact with the application through adapters User Case Consider Loan Application use case. A customer wants to apply for a loan application using online website or using an ATM. Application then verifies the credit rating check system,updates information in database and sends an update mail to the customer Hexagonal Bondries are ApplyForLoan CheckCreditRating SaveCustomerInformation SendEmail Port (API): LoanApplication Port (ApplyForLoan) Port (SPI): Credit Rating System Port (CheckCreditRating) FTP Port (SaveCustomerInformation) Notification Port (SendEmail) Adapters: Load Application Adapter (Assuming ATM machine interacts with the banking system using a REST API ) Credit Rating System Adapter (Interacts with credit rating check system.) Send Notification Adapter ( Interacts with notification system ) FTP adapter (For intracting with FTp server to store customers information) Conclusion This is my understanding about hexagonal architecture. If you want to get more information on the topic, read Alistair Cockburn’s original article on the subject I hope this article will help you understand idea of Hexagonal Architecture and who they are comes together I’ll be glad for any feedback!
