Expert one-on-one J2EE Design and Development phần 8 ppsx

... "com.wrox.expertj2ee.ticket.referencedata.Performance" scope = "request"/> <jsp:useBean id="priceband" type = "cora.wrox.expertj2ee.ticket.referencedata.PriceBand" ... and time and a list of PriceBand objects for that performance: public interface Performance extends Ref erenceltem { Show getShow(); Date getWhen(); List getPriceBands(...

Ngày tải lên: 13/08/2014, 12:21

... 4: Design Techniques and Coding Standards for J2EE Projects 113 Chapter 5: Requirements for the Sample Application 179 Chapter 6: Applying J2EE Technologies 203 Chapter 7: Data Access in J2EE ... reliable and bug- free. Hence we must understand and take advantage of those parts of J2EE that can help us build robust solutions and must ensure that we write quality code. ❑ Be p...

Ngày tải lên: 13/08/2014, 12:21

... EJBs and web applications in the same server instance. 93 Brought to you by ownSky Design Techniques and Coding Standards for J2EE Projects As J2EE applications tend to be large and complex, ... is bad J2EE code. Some "coding standards" issues – especially those relating to OO design – are on the borderline between design and implementation: for example, t...

Ngày tải lên: 13/08/2014, 12:21

... provide the basis for worthwhile discussion of J2EE architectural decisions and a meaningful implementation exercise. This application has been designed from the business perspective (with generous ... to proceed to purchase these seats, and that they should be returned to fully available status. Error Handling I the event of a system error (such as the J2EE server failing to con...

Ngày tải lên: 13/08/2014, 12:21

... to entity beans and the transaction and security management infrastructure for entity beans is architecturally gratuitous and an unnecessary overhead. These are issues to be handled by session ... of this behavior with all databases, JDBC drivers, and application servers, as the JDBC 2.0 API (the version guaranteed with J2EE 1.3) and J2EE specifications do not require prepar...

Ngày tải lên: 13/08/2014, 12:21

... public interface CommandExecutor { Command executeCommand(Command command) throws RemoteException, CommandException; } An SFSB remote interface might extend this (the executeCommand () method has ... PriceBandQuery object as an instance variable in the OracleJdbcSeatingPlanDAO class, and initialize it in the constructor as shown below: private PriceBandQuery priceBandQuery; …… this...

Ngày tải lên: 13/08/2014, 12:21

... key to designing maintainable J2EE web applications, and the central point of this chapter. Both servlets and view technologies (such as JSP) are required for building maintainable J2EE web ... advantages of the Command design pattern, such as the ability to queue, log, and possibly undo commands. o We may be able to use transparent data binding from request to command bean pro...

Ngày tải lên: 13/08/2014, 12:21

... Model.get(TicketController.PERFORMANCE_KEY); PriceBand priceBand = (PriceBand) model.get (TicketController. PRICE_BAND_KEY) ; Next, we use the same code we've seen before to format dates and currency amounts according ... model.get(TicketControiler.PERFORMANCE_KEY); PriceBand priceBand = (PriceBand) model.get(TicketController.PRICE_BAND_KEY) ; Next we use similar code to that...

Ngày tải lên: 13/08/2014, 12:21

... p.getPriceBands().size(); i++) { PriceBand pb = (PriceBand) p.getPriceBands().get(i) ; avail = boxOf fice.getFreeSeatCount (p.getld() , pb.getldO) PriceBandWithAvailability pba = new PriceBandWithAvailabilitylmpl(pb, ... p.getPriceBands().size(); i++) { PriceBand pb = (PriceBand) p.getPriceBands().get( i ); avail = boxOff ice.getFreeSeatCount (p.getldl), pb.getId()); PriceBandWithAv...

Ngày tải lên: 13/08/2014, 12:21