Summary
In this chapter, we opted for the design-first approach to writing RESTful web services. You learned how to write an API description using OAS and how to generate models and API Java interfaces using the Swagger Codegen tool (using the Gradle plugin). We also implemented a Global Exception Handler to centralize the handling of all the exceptions. Once you have the API Java interfaces, you can write their implementations for business logic. Now, you know how to use OAS and Swagger Codegen to write RESTful APIs. You also now know how to handle exceptions globally.
In the next chapter, we’ll implement fully fledged API Java interfaces with business logic with database persistence.
