This is a simple Hello World API for recruiting purposes. You, as a candidate, should work on the challenge on your own account. Please clone the repo to your account and create a PR with your solution.

You need to add a new endpoint to the API to allow users to update the greetings they created.

I have listed all the changes and enhancements below. I spent 10-12 hours analyzing and implementing the solution.

• Added a new endpoint Patch /hello/{id} to patch the existing greeting in the system.
  • It will update the entity, only if it is present in the system.
  • If there is no entity in system for the provided Id, then system shall send a resource not found response.
• Updated Post /hello - endpoint.
  • This endpoint was returning the newly created entity in response.
  • Updated code shall return the newly created entity as well as the location of entity in response header.
  • It is achieved by using EntityCreatedResponse.class, which has location field.

• Dependency injection strategy changed. Removed constructor injection of HelloService.class in HelloController.class and used setter injection instead.

• Added Swagger dependency in project. It will enable the audience to visualize all the available API operations.
• Added GlobalConfiguration.class - This is used for adding project configuration, included swagger configuration bean for API documentation.
  Documentation path: http://localhost:8080/swagger-ui.html#/

• Fixed returnsBadRequestWhenUnexpectedAttributeProvided() and createOKWhenRequiredGreetingProvided() test in HelloControllerTest.class.
• Added integration test case for Patch /hello{id} endpoint.
• Added unit test case for update greeting in HelloWorldServiceTest.class

I found logger and datasource missing in the application. I assume it was avoided, for convenience sake.
Thank you for sending this coding challenge. I have tried my best to provide a feasible solution.