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public int Value { get { return value; } set { this.value = value; } } /// <summary> /// Power value /// </summary> public int Power { get { return power; } set { power = value; } } /// <summary> /// Position of component on screen /// </summary> public Vector2 Position { get { return position; } set { position = value; } } /// <summary> /// Allows the GameComponent to draw itself /// </summary> /// <param name="gameTime">Provides a snapshot of timing values</param> public override void Draw(GameTime gameTime) { string TextToDraw = string.Format("Score: {0}", value); // Draw the text shadow spriteBatch.DrawString(font, TextToDraw, new Vector2(position.X + 1, position.Y + 1), Color.Black); // Draw the text item spriteBatch.DrawString(font, TextToDraw, new Vector2(position.X, position.Y), fontColor); float height = font.MeasureString(TextToDraw).Y; TextToDraw = string.Format("Power: {0}", power); // Draw the text shadow spriteBatch.DrawString(font, TextToDraw, new Vector2(position.X + 1, position.Y + 1 + height), Color.Black);

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<bean class="org.springframework.remoting.rmi.RmiServiceExporter"> <property name="serviceName" value="UserAccountService"/> <property name="service" ref="userAccountService"/> <property name="serviceInterface" value="com.apress.timesheets.service.UserAccountService"/> <property name="registryPort" value="1001"/> </bean> The RMI service exporter configured in Listing 9-3 performs two tasks: creating and instantiating the RMI registry and registering the user account service bean with it by a given name.

// Draw the text item spriteBatch.DrawString(font, TextToDraw, new Vector2(position.X, position.Y + 1 + height), fontColor); base.Draw(gameTime); } } } Again, this looks like the code in the previous version, only this time it is encapsulated in a class. Also, the text is now drawn with a little shadow under it, to enhance the legibility and give it a touch of style, as you did with the Menu component.

The serviceName property defines the name by which clients will access the service. This has no connection with the class names or the bean IDs used by Spring. The service property references the bean implementation to be exported. The service interface references the interface whose methods are to be made available over RMI. This must be explicitly specified, and your bean implementation must therefore implement at least one interface in order to be made into an RMI service. If this is not compatible with your design for some reason, you will have to create an additional bean implementation honoring a suitable interface that delegates method calls to the original service bean. Spring cannot autodetect and export service methods because of the risk of accidentally exposing inappropriate (insecure or privileged) methods such as property setters to untrusted external parties. The interface is the only mechanism by which you can define the basic set of methods to be exported. Finally, the registryPort specifies the port on which the registry will accept queries from RMI clients. When a client connects, it will connect to the registry on this port and negotiate with it for a channel to the service in question.

The change in Rock Rain s playability brings up the need for an interesting additional component. The player s ship now contains a finite energy source, which decreases over time and falls even more after a meteor collision. You must provide a means for players to recharge their ships, so they can stay in the game longer, accumulating more points. You ll create a new GameComponent, which looks like a small barrel of energy that shows up at regular intervals and falls together with the meteors. If the player touches this power source game component, it will refuel the ship with more energy. The idea is that the player keeps an eye out for this new element and tries to obtain it without hitting any incoming meteors. Add a new class called PowerSource and add the code in Listing 4-6. Listing 4-6. The PowerSource GameComponent #region Using Statements using using using using using System; System.Collections.Generic; Microsoft.Xna.Framework; Microsoft.Xna.Framework.Graphics; RockRainEnhanced.Core;

#endregion namespace RockRainEnhanced { /// <summary> /// This is a GameComponent that implements the power source element /// </summary> public class PowerSource : Sprite { protected Texture2D texture; protected Random random;

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