In an earlier article on the OpenAPI design-first approach I compared openapi-generator and swagger-codegen. Now I’m revisiting the topic by adding the Quarkus OpenAPI Generator to the comparison.
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You’re given the task of writing a microservice AND providing a documentation in OpenAPI format. You already know that there are two main approaches:

• code-first : write the code, using OpenAPI annotations, and then generate the OpenAPI document
• design-first : write the OpenAPI document (a.k.a. the openapi.yaml file) and then generate the code

This is the second article in a series and reviews the design-first approach, the code-first approach was the subject of the first article.

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