Web Programming

Todo REST Service (Interface)

The objective of this exercise is to implement a REST interface of a todo service.

Tasks

1. Extract the template project todo-rest-service.zip.
2. Implement the servlet TodoListServlet that holds a global todo list and supports the following REST requests (see also OpenAPI Definition):
   • GET /api/todos returns all todos of the list
   • GET /api/todos?category={category} returns the todos of the specified category
   • GET /api/todos/{id} returns the todo with the specified identifier
   • POST /api/todos adds a todo to the list
   • PUT /api/todos/{id} updates the todo with the specified identifier
   • DELETE /api/todos/{id} deletes the todo with the specified identifier
   Make sure to return appropriate status codes, especially in case of error.
3. Use the factory ObjectMapperFactory to create a Jackson ObjectMapper and use it to convert Java objects to JSON and vice versa.
4. (Optional) Verify that the media type headers Content-Type and Accept are set correctly and return an appropriate error response if not.
5. Use the Postman application to test the REST service.

Solution