Develop the Resource Tier

There are four major steps in service development

• Creating the entity
• Creating the data access tier
• Creating the business service tier
• Creating the JSON-based REST service, which will be integrated with the user interface

We will follow a bottom-up approach here, starting with the entity and ending with the REST service.

Following a test-driven development approach, we will write the test for each method, followed by the definition of the actual method. In the entity test method, we first create two instances of a book entity followed by an update and a delete. Finally, we check whether or not one instance of the book remains. After the test executes, the operation is rolled back.