This document describes a group project to implement a RESTful web service for booking flights and hotels. It includes an introduction to REST, an overview of the technologies and architecture used, details about implementing and securing the services, instructions for deploying and testing, and reflections on the project experience. The services allow clients to interact with resources like flights and hotels via HTTP methods at unique URIs, and are built using JAX-RS, Jersey, and deployed in a Grizzly container.

1. Group15 Rest
Yuan Gao
Ning Ma
Bin Cai

2. Overview
Introduction
Technologies and toolkits
Architecture
Implementation & Security
Deploy & Test
Analysis and evaluation

3. Introduction
RESTful Web Services is different from SOAP-
style services
using HTTP GET PUT POST DELETE
Unique URI to describe Resource

4. Introduction
Client
3 Services:
TravelAgent, Flight, Hotel
Resources:
/flight
/hotel
/booking
/query

5. Technologies and
Toolkits
AJAX: send request and receive response
XML: store and transmit data
JAX-RS (JSR 311): Java API for RESTful Web
Services

6. Technologies and
Toolkits
Maven: project management
Jersey: JAX-RS Reference Implementation for
building RESTful Web services
Grizzly: Web application container

7. Architecture
Diagram

8. Implementation
define classes:
import import
javax.xml.bind.annotation.XmlRootElement; javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement @XmlRootElement
public class Flight { public class Hotel {
! ! private int Id;
! private int flightNo; ! private String Name;
! private String from; ! private int price;
! private String to; ! private String address;
! private int departTime; ! public Hotel() {}
! private int arriveTime; ...
! private int price;
! public Flight() {}
...
TravelAgent, FlightResource, HotelResource...etc...

9. Implementation
Jersey API annotation:
@Path
@GET
@POST
@Produces
...
Let’s look at some pieces of code as example:

10. Some code...
@Path("/flight")
@Produces("application/xml")
public class FlightResource {
!
! public TreeMap<Integer, Flight> flightMap = new TreeMap<Integer, Flight>();
...
! @GET
! public List<Flight> getFlights() {
! List<Flight> flights = new ArrayList<Flight>();
! flights.addAll(getFlightMap().values());
! return flights;
! }

11. Some code...
...
@GET
! @Path("{flightNo}")
! public Flight getFlight(@PathParam("flightNo") int cId) {
! return getFlightMap().get(cId);
! }
...

12. Security
HTTPS: use class HTTPSProperties to set
javax.net.ssl.HostnameVerifier and
javax.net.ssl.SSLContext
@Context SecurityContext customer
if (customer.isUserInRole("user") {
return new Flight();
} else {
return “please provide effective customer”;
}

13. Deploy
<web-app>
<servlet>
<servlet-name>Jersey Web Application</servlet-name>
<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>uk.ac.soton.ecs.comp6017</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey Web Application</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>

14. Test
use Jersey client api to set up test case
try {
! ! System.out.println("==> Test 1: Get all flight ");
!
! ! ClientConfig config = new DefaultClientConfig();
! ! Client client = Client.create(config);
! ! client.getProperties().put(ClientConfig.PROPERTY_FOLLOW_REDIRECTS, true);
! ! WebResource service = client.resource("http://localhost:8080/");
System.out.println(service.path("rest2011").path("travelagent").type(MediaType.APPLICATION_FORM_
URLENCODED).get(String.class));
System.out.println("n");
! ｝
...

15. Analysis and
evaluation
Understanding REST architecture
Use toolkits to implement scenario
Challenges
Work as a team

16. Thank you!