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1
51
52 package org.objectweb.jass.examples.travelagency.servlets;
53
54 import org.objectweb.jass.examples.travelagency.ejbs.AirlineHome;
55 import org.objectweb.jass.examples.travelagency.ejbs.Airline;
56 import org.objectweb.jass.examples.travelagency.ejbs.HotelHome;
57 import org.objectweb.jass.examples.travelagency.ejbs.Hotel;
58 import org.objectweb.jass.examples.travelagency.ejbs.TravelAgency;
59 import org.objectweb.jass.examples.travelagency.ejbs.TravelAgencyHome;
60 import org.objectweb.jass.examples.travelagency.exceptions.DBException;
61 import org
62 .objectweb
63 .jass
64 .examples
65 .travelagency
66 .exceptions
67 .NotEnoughSeatsException;
68 import org
69 .objectweb
70 .jass
71 .examples
72 .travelagency
73 .exceptions
74 .NotEnoughRoomsException;
75
76 import javax.servlet.http.HttpServlet  ;
77 import javax.servlet.http.HttpServletRequest ;
78 import javax.servlet.http.HttpServletResponse ;
79 import javax.naming.Context ;
80 import javax.naming.NamingException ;
81 import javax.naming.InitialContext ;
82 import javax.ejb.CreateException ;
83 import javax.activity.opennested.UserOpenNested;
84 import java.io.IOException ;
85 import java.io.PrintWriter ;
86 import java.rmi.RemoteException ;
87
88
95 public class ReservationServlet extends HttpServlet {
96 private Airline airline;
97 private Hotel hotel;
98 private TravelAgency travelAgency;
99 private UserOpenNested uon;
100
101
105 public void init() {
106 airline = getAdaptAirlineEJB();
107 hotel = getAdaptHotelEJB();
108 travelAgency = getAdaptTravelAgencyEJB();
109 System.out.println("Reservation Servlet. Init called!!!");
110 }
111
112
115 public void destroy() {
116 System.out.println("Reservation Servlet. Destroy called!!!");
117 }
118
119
122 public void service(HttpServletRequest req, HttpServletResponse res)
123 throws IOException {
124 res.setContentType("text/html");
125 PrintWriter out = res.getWriter();
126
127 out.println(
128 "<HTML><HEAD></HEAD><BODY>"
129 + "<H1><U>ADAPT RESERVATION SERVICE</U></H1>");
130
131 String action = req.getParameter("action");
132 if (action == null) {
133 try {
134 showFlightInfo(out);
135 showHotelInfo(out);
136 showRequest(out);
137 } catch (DBException e) {
138 out.println(
139 "<H2><FONT COLOR=\"red\">Database ERROR!!!" + "</FONT></H2>");
140 }
141 } else {
142 if (action.equals("reserve")) {
143 String name = req.getParameter("name");
144 String nSeats = req.getParameter("number_of_seats");
145 String nRooms = req.getParameter("number_of_rooms");
146 makeReservation(
147 out,
148 name,
149 Integer.parseInt(nSeats),
150 Integer.parseInt(nRooms));
151 }
152 }
153 insertReturn(out);
154 out.println("</BODY></HTML>");
155 }
156
157
161 private void showFlightInfo(PrintWriter out) throws DBException {
162 int freeSeats = 0;
163
164 try {
165 freeSeats = airline.getFreeSeats();
166 } catch (RemoteException e) {
167 e.printStackTrace();
168 }
169
170 out.println(
171 "<CENTER><H3>Flight Info (ADPT001):</H3>"
172 + "<FONT COLOR=\"red\"><U>Free</U> seats in flight: </FONT>"
173 + freeSeats
174 + "</CENTER><HR SIZE=3>");
175 }
176
177
181 private void showHotelInfo(PrintWriter out) throws DBException {
182 int freeRooms = 0;
183
184 try {
185 freeRooms = hotel.getFreeRooms();
186 } catch (RemoteException e) {
187 e.printStackTrace();
188 }
189
190 out.println(
191 "<CENTER><H3>Hotel Info (ADAPT PALACE *****):</H3>"
192 + "<FONT COLOR=\"red\"><U>Free</U> rooms in hotel: </FONT>"
193 + freeRooms
194 + "</CENTER><HR SIZE=3>");
195 }
196
197
201 private void showRequest(PrintWriter out) {
202 out.println(
203 "<BR><FONT COLOR=\"red\"><U>Instructions:</U></FONT> Please, "
204 + "insert below your name and the number of seats "
205 + "and rooms that you want to reserve. If it is possible, the system "
206 + "will made the corresponding reserves for you -attending to the "
207 + "values shown above- and it will report to you the results or any "
208 + "possible failure.<BR><BR>");
209 out.println(
210 "<FORM METHOD=\"POST\" ACTION=\"reservation\"> "
211 + "<H3>Reservation Info:</H3>"
212 + "Reservation Name:<INPUT TYPE=\"TEXT\" NAME=\"name\"><BR><BR>"
213 + "Flight info (Number of seats): <INPUT TYPE=\"TEXT\" NAME=\"number_of_seats\"><BR>"
214 + "Hotel info (Number of rooms): <INPUT TYPE=\"TEXT\" NAME=\"number_of_rooms\"><BR>"
215 + "<INPUT TYPE=\"HIDDEN\" NAME=\"action\" VALUE=\"reserve\">"
216 + "<BR><INPUT TYPE=\"RESET\" VALUE=\"Clear\">"
217 + "<INPUT TYPE=\"SUBMIT\" VALUE=\"Send\">"
218 + "</FORM>");
219 out.println("</CENTER><HR SIZE=3>");
220 }
221
222
226 private void insertReturn(PrintWriter out) {
227 out.println(
228 "<FORM METHOD=\"POST\" ACTION=\"reservation\"> "
229 + "<INPUT TYPE=\"SUBMIT\" VALUE=\"Go Reservation Page\"> "
230 + "</FORM>");
231 }
232
233
236 private Airline getAdaptAirlineEJB() {
237 Object obj = null;
238 Context ctx = null;
239 Airline airline = null;
240 try {
241 ctx = new InitialContext ();
242 obj = ctx.lookup("AirlineEJB");
243 AirlineHome airlineHome =
244 (AirlineHome) javax.rmi.PortableRemoteObject.narrow(
245 obj,
246 AirlineHome.class);
247 airline = airlineHome.create();
248 } catch (NamingException e) {
249 e.printStackTrace();
250 } catch (CreateException e) {
251 e.printStackTrace();
252 } catch (RemoteException e) {
253 e.printStackTrace();
254 }
255 return airline;
256 }
257
258
261 private Hotel getAdaptHotelEJB() {
262 Object obj = null;
263 Context ctx = null;
264 Hotel hotel = null;
265 try {
266 ctx = new InitialContext ();
267 obj = ctx.lookup("HotelEJB");
268 HotelHome hotelHome =
269 (HotelHome) javax.rmi.PortableRemoteObject.narrow(
270 obj,
271 HotelHome.class);
272 hotel = hotelHome.create();
273 } catch (NamingException e) {
274 e.printStackTrace();
275 } catch (CreateException e) {
276 e.printStackTrace();
277 } catch (RemoteException e) {
278 e.printStackTrace();
279 }
280 return hotel;
281 }
282
283
286 private TravelAgency getAdaptTravelAgencyEJB() {
287 Object obj = null;
288 Context ctx = null;
289 TravelAgency travelAgency = null;
290 try {
291 ctx = new InitialContext ();
292 obj = ctx.lookup("TravelAgencyEJB");
293 TravelAgencyHome travelAgencyHome =
294 (TravelAgencyHome) javax.rmi.PortableRemoteObject.narrow(
295 obj,
296 TravelAgencyHome.class);
297 travelAgency = travelAgencyHome.create();
298 } catch (NamingException e) {
299 e.printStackTrace();
300 } catch (CreateException e) {
301 e.printStackTrace();
302 } catch (RemoteException e) {
303 e.printStackTrace();
304 }
305 return travelAgency;
306 }
307
308
316 private void makeReservation(
317 PrintWriter out,
318 String name,
319 int nSeats,
320 int nRooms) {
321 try {
322 travelAgency.makeReservation(name, nSeats, nRooms);
323 out.println(
324 "<CENTER><H2>Congratulations!!!</H2>"
325 + "<H3>Customer <FONT COLOR=\"red\">"
326 + name
327 + "</FONT> has reserved <FONT COLOR=\"red\">"
328 + nSeats
329 + "</FONT> seats and <FONT COLOR=\"red\">"
330 + nRooms
331 + "</FONT> rooms</H3></CENTER>");
332 } catch (RemoteException e) {
333 e.printStackTrace();
334 } catch (NotEnoughSeatsException e) {
335 out.println(
336 "<CENTER><H2>An ERROR has occurred!!!</H2><BR>"
337 + "<H3><FONT COLOR=\"red\">Not enough seats in flight!!!</FONT></H3></CENTER>");
338 } catch (NotEnoughRoomsException e) {
339 out.println(
340 "<CENTER><H2>An ERROR has occurred!!!</H2><BR>"
341 + "<H3><FONT COLOR=\"red\">Not enough rooms in hotel!!!</FONT></H3></CENTER>");
342 } catch (DBException e) {
343 out.println(
344 "<H2><FONT COLOR=\"red\">Database ERROR!!!" + "</FONT></H2>");
345 } catch (Exception e) {
346 out.println(
347 "<H2><FONT COLOR=\"red\">Unespected ERROR!!!" + "</FONT></H2>");
348 }
349 }
350 }
351 |
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