api swagger yaml json api first design first contract first
An extension of “Design-First” methodology is “Contract-First” where the developer defines the contract of the API before the implementation is coded. Just-in-time and just-enough design is critical to agility. Applying design-first / contact-first methodology to the world of API development results in “API-First” development. The basic idea is that you create an API contract before implementing the full code and plumbing. The human-readable API specification becomes the quick first deliverable that allows fast, quick feedback from various stakeholders. These rapid iterations are a game changer because changing the API specification takes minutes not hours or days! Once the team determines that the API specification is “good enough” a full maven Spring Boot Application can be generated. Many other languages are supported as well – more on that later. The developer codes the business logic implementation in the server stub. While the developer is coding, the QA teams can be handed the spec as well so they get a head start on service testing.
