Adding OpenAPI and Swagger UI
Understanding and interacting with third-party systems is sometimes a non-trivial undertaking. In the best scenario, we may have the system documentation, an organized code base, and a set of APIs that, together, help us understand what the system does. In the worst scenario, we have none of these things. This challenging situation requires courage, patience, and persistence to venture into trying to understand a tangled code base with intricate complexities.
OpenAPI represents an honorable effort to increase our capacity to express and understand what a system does. Originally based on the Swagger specification, the OpenAPI specification standardizes how APIs are documented and described so that anyone can grasp the capabilities offered by a system without much effort.
We spent the previous section implementing the Reactive input adapters that form the API of our hexagonal system. To make this system more understandable to other people and systems...
