.NET/ASP.NET/C#/VB.NET PDF Document SDK

MimeMessage createMimeMessage(InputStream contentStream) throws MailException; void send(MimeMessage mimeMessage) throws MailException; void send(MimeMessage[] mimeMessages) throws MailException; void send(MimeMessagePreparator mimeMessagePreparator) throws MailException; void send(MimeMessagePreparator[] mimeMessagePreparators) throws MailException; Unfortunately, no standard object exists to perform this task. We shall therefore roll our own mock object. Unlike the database-backed examples of the previous section, however, we are creating a pure mock object. Listing 10-18 shows the mock MailSender implementation.

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MediaPlayer.Play(audio.StartMusic); enhancedPosition = new Vector2((rainPosition.X + rainRect.Width enhancedRect.Width/2) - 40, rainPosition.Y+20); showEnhanced = true; } } else { elapsedTime += gameTime.ElapsedGameTime; if (elapsedTime > TimeSpan.FromSeconds(1)) { elapsedTime -= TimeSpan.FromSeconds(1); showEnhanced = !showEnhanced; } } base.Update(gameTime); } Next, let s deal with the Game1 class. This class is responsible for overall control of the game. Here, you are concerned with only the keyboard treatment and the instantiation of the HelpScene class, which had its constructor changed a bit. Start by removing all references to oldKeyboardState attribute (including its statement), which are used to manipulate keyboard entries. Also remove references to the helpForegroundTexture attribute, because as you saw earlier, it is no longer necessary since the HelpScene class needs only one texture for the Zune version of the game. After all these changes, the class constructor should look as follows:

The service layer represents the business logic of the application. All operations from the presentation layer pass through the service layer. Indeed, ideally the presentation layer is a relatively thin veneer of functionality on top of the service layer. The service layer is often exposed to other external mechanisms that need to have direct access to the logic of the application for example, an application may make the methods of all or part of the service layer available via SOAP so that third parties can create their own clients to the system. The service layer itself is then a combination of business logic and an aggregation of necessary data access layer components. In my simple timesheet application, this means that you will see a lot of service layer methods as simple as (or simpler than) the example in Listing 2-1.

public Game1() { graphics = new GraphicsDeviceManager(this); Content.RootDirectory = "Content"; // Used for input handling oldGamePadState = GamePad.GetState(PlayerIndex.One); } The CheckEnterA method checks if the Enter key or the A button of the Xbox 360 gamepad was pressed. Rename this method to CheckActionButton, which makes more sense in the Zune, and check only the gamepad status: /// <summary> /// Check if the Action button was pressed /// </summary> /// <returns>true, if button was pressed</returns> private bool CheckActionButton() { // Get the keyboard and gamepad state GamePadState gamepadState = GamePad.GetState(PlayerIndex.One); bool result = (oldGamePadState.Buttons.A == ButtonState.Pressed) && (gamepadState.Buttons.A == ButtonState.Released); oldGamePadState = gamepadState; return result; } As the menu items are different, you also need to update the HandleStartSceneInput method to show the correct scenes of the game: /// <summary> /// Handle buttons and keyboard in StartScene /// </summary> private void HandleStartSceneInput() { if (CheckActionButton()) { audio.MenuSelect.Play(); switch (startScene.SelectedMenuIndex) { case 0: ShowScene(actionScene); break; case 1: ShowScene(helpScene); break;

public void updateTimesheet(final Timesheet timesheet) { timesheetDao.update(timesheet); emailDao.sendTimesheetUpdate(timesheet); } This may seem pointless it s natural to wonder why the two DAO method calls cannot be incorporated directly into a presentation layer method but there are advantages. The service layer method can be exposed to the outside world without needing to reveal the existence (and implementation detail) of the two DAOs. And the method provides a simple place in which to put transactionality. If the timesheet update fails, we don t want to send the e-mail, and conversely if the e-mail cannot be sent, we should not update the timesheet. The issues around building a business service layer and transactionality are discussed in full detail in 5.