Open API Specification - Swagger 3

This is a demo project to understand basic implementation of Open API Specification. The Swagger UI will be configured and rendered.

The blog URL OpenAPI Specification — Swagger UI

Swagger UI for API Specification

Swagger UI v3 provides a display framework that reads API specification document and generates an interactive documentation website.

Below URL can be used to access Swagger UI when the spring-boot application is run locally. Swagger UI endpoint can be customized via application.properties file. This will be described in later sections.

Localhost Swagger UI

Default API Endpoint

On systems running the API, it is recommended to use the below port for starting an API instance.

10001 - default api listening port

API Build & deploy from GIT repository

Below section would cover tasks required to configure and deploy api jar

1. Clone repo on local system. By default, jars would be taken from Maven Central Repository
2. Update properties in logback-spring.xml, application.properties if required.
3. Build the project using Maven command mvn clean install
4. Copy .jar file created in /project-directory/target/ to deployment-directory
5. Environment specific application.proeprties & logback-spring.xml files if modified, then they are to be placed in deployment-directory along with the jar file.
6. Start the jar execution with command java -jar <project-name>-<version>.jar

   eg: java -jar open-api3-0.0.1-SNAPSHOT.jar

7. Logs are generated in /deployment-directory/logs/ folder or as mentioned in logback-spring.xml file

Configure application.properties

Below section describes how to configure application.properties file to override the default values.

• Spring Boot Server Port

  server.port=10001

• Spring Boot Application name

  spring.application.name=open-api-demo

• Spring Boot Application Context path

  spring.servlet.context-path=/open-api-demo

• Open API Configuration Properties

  openapi.title=Open API Demo
  openapi.version=v1.0.0
  openapi.description=Swagger UI using Open API Specification

• Default Open API endpoint Specifications

  • api docs endpoint path

    springdoc.api-docs.path=/v3/api-docs

  • customise endpoint for Swagger UI

    springdoc.swagger-ui.path=/swagger-ui.html

  • disable default petstore Swagger

    springdoc.swagger-ui.disable-swagger-default-url=true