Trying out the OpenAPI documentation

To browse the OpenAPI documentation, we will use the embedded Swagger UI viewer. If we open the http://localhost:8080/openapi/swagger-ui.html URL in a web browser, we will see a web page that looks something like the following screenshot:

Figure 5.2: OpenAPI documentation with the Swagger UI viewer

Here, we can ascertain the following:

1. The general information we specified in the springdoc-openapi OpenAPI bean and a link to the actual OpenAPI document, /openapi/v3/api-docs, pointing to http://localhost:8080/openapi/v3/api-docs.

   Note that this is the link to the OpenAPI document that can be exported to an API Gateway, as discussed in the Introduction to using springdoc-openapi section above.

2. A list of API resources; in our case, the ProductComposite API.
3. At the bottom of the page, there is a section where we can inspect the schemas used in the API.

   Proceed with the examination...