Studio: LaunchCart REST

In this studio, we’ll add additional RESTful endpoints to the LaunchCart application. It builds upon the changes we added in the Walkthrough: LaunchCart REST.

Getting Started

From the same launchcart project/repository that you used previously, make sure you are in the rest-walkthrough-starter branch that you used earlier today.

If you don’t have the walkthrough code, you can fetch changes from the remote and check out the rest-studio-starter branch.

Create a story branch:

(switch to the rest-studio branch)
$ git checkout rest-studio-starter

(-b will create a branch and then checkout that new branch)
$ git checkout -b rest-studio-solution

Write integration tests before coding each controller method below. In doing so, you may find the documentation for JsonPath to be useful. Also, refer to existing tests in ItemRestControllerTests.


  • Use TDD to write tests before writing code
  • GET /api/items endpoint can take an additional optional parameter: new
  • Add /api/customers Resources
  • Add /api/carts Resources

Add new Parameter to /api/items

Add a new parameter to the GET /api/items endpoint. Note that this should work in conjunction with the price parameter, so that one, both, or neither can be used when querying the resource.


You’ll need to create one or more new query methods in ItemRepository. You might find the documentation on Spring Data JPA query creation helpful for this.

Add /api/customers Resources

Add the following REST resources:

  • GET /api/customers
  • GET /api/customers/{id}
  • GET /api/customers/{id}/cart

Write integration tests before coding each controller method. When testing, be sure to test for the expected status code, content type, and response contents.

Add /api/carts Resources

Add the following REST resources:

  • GET /api/carts
  • GET /api/carts/{id}
  • PUT /api/carts/{id} - allow items to be added to a cart

A cart resource should include information about its owner, as well the items contained in the cart. The PUT method should allow for items to be added and removed from the cart.

Bonus Mission

If you finish the primary studio tasks, try to enable HATEOAS for your REST controllers by referencing the Spring tutorial, Building a Hypermedia-Driven RESTful Web Service. The sections titled “Create a resources representation class” and “Create a RestController” are most relevant.

Turning In Your Work

If you don’t complete each of the tasks, turn in as much as you have completed by the end of the day.

  • Commit and push your work to GitLab
  • Create a merge request for your rest-studio-solution
  • Post the URL to your merge request in slack