Order Management REST API

Demonstrates a simple RESTful web service using Spring MVC and Java. This web service provides an in-memory order management service, with the capability to get a single order, get all orders, create an order, delete an order, and update an order. After exploring this project, the reader will understand the three common layers of a RESTful web service (namely domain, data source, and presentation), the common design decisions used when creating a web service, and the functionality provided by the Spring framework for creating a web service (as well as supplemental functionality, such as creating HATEOAS links). In particular, the reader will learn

• How to create a domain model
• How to store domain objects in a persistence layer
• How to wrap domain objects within resource objects
• How to add HATEOAS links to a resource
• How to serve up resources to a client over HTTP
• How to provide RESTful Create, Read, Update, and Delete (CRUD) operations to change domain objects
• How to create unit, integration, and acceptance tests that exercise a REST API

Starting the Order Management System

To start this web service, install Maven and execute the following command

mvn spring-boot:run

Once the web service is started, it can be reached at

http://localhost:8080/order

REST Endpoints

The following REST endpoints are available upon deployment of the order management system:

HTTP Verb	URL	Description	Status Codes
GET	http://localhost:8080/order	Obtains a list of all existing orders	200 OK
GET	http://localhost:8080/order/{id}	Obtains the order corresponding to the supplied order ID	200 OK if order exists 404 Not Found if order does not exist
POST	http://localhost:8080/order	Creates a new order based on the payload contained in the request body	201 Created if order successfully created
PUT	http://localhost:8080/order/{id}	Updated an existing order with the data contained in the request body	200 OK if order succesfully updated 404 Not Found if order does not exist
DELETE	http://localhost:8080/order/{id}	Deletes an existing order that corresponds to the supplied order ID	204 No Content if order succesfully deleted 404 Not Found if order does not exist