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You should see the schema shown in figure 2.5 after logging in. Run your application with ant run, and watch the console for Hibernate log output. You should see your messages being stored, loaded, and printed. Fire an SQL query in the HSQLDB browser to check the content of your database directly. You now have a working Hibernate infrastructure and Ant project build. You could skip to the next chapter and continue writing and mapping more complex business classes. However, we recommend that you spend some time with the

2. By default, Windows XP Professional does not clear the virtual memory pagefile when the system is shut down. Why can this be considered a security breach and what can you do to resolve it

The data in the pagefile might be accessible to users who are not authorized to view that information. To clear the pagefile each time the system is shut down, in the Local Security Settings window, expand Local Policies and click Security Options. Right-click Shutdown: Clear Virtual Memory Pagefile, and then click Properties. Select Enabled.

Hello World application and extend it with more functionality. You can, for example, try different HQL queries or logging options. Don t forget that your database system is still running in the background, and that you have to either export a fresh schema or stop it and delete the database files to get a clean and empty database again. In the next section, we walk through the Hello World example again, with Java Persistence interfaces and EJB 3.0.

Questions and Answers 16-69

Requiring users to press CTRL+ALT+DELETE to log on to the computer increases security on your computer because you are forcing users to use a key combination recognized only by Windows. Using this key combination ensures that users are giving the password only to Windows, not to a program waiting to capture user passwords.

In the following sections, we show you some of the advantages of JPA and the new EJB 3.0 standard, and how annotations and the standardized programming interfaces can simplify application development, even when compared with Hibernate. Obviously, designing and linking to standardized interfaces is an advantage if you ever need to port or deploy an application on a different runtime environment. Besides portability, though, there are many good reasons to give JPA a closer look. We ll now guide you through another Hello World example, this time with Hibernate Annotations and Hibernate EntityManager. You ll reuse the basic project infrastructure introduced in the previous section so you can see where JPA differs from Hibernate. After working with annotations and the JPA interfaces, we ll show how an application integrates and interacts with other managed components EJBs. We ll discuss many more application design examples later in the book; however, this first glimpse will let you decide on a particular approach as soon as possible.

Tuesday of each month because this plan does not ensure adequate time to test whether updates cause conflicts with existing configurations.

4. By default, Windows XP Professional displays the last user name to log on to the computer in the Windows Security dialog box. Why is this considered a security risk, and what can you do to resolve it

In some situations, displaying the last user name is considered a security risk because an unauthorized user can see a valid user account displayed onscreen, which makes it much easier to break into the computer. To resolve this security problem, in the Local Security Settings window, expand the Local Policies node, and then click Security Options. In the details pane, right-click Interactive Logon: Do Not Display Last User Name, click Properties, and select Enabled.

Let s first use Hibernate Annotations to replace the Hibernate XML mapping files with inline metadata. You may want to copy your existing Hello World project directory before you make the following changes you ll migrate from native Hibernate to standard JPA mappings (and program code later on). Copy the Hibernate Annotations libraries to your WORKDIR/lib directory see the Hibernate Annotations documentation for a list of required libraries. (At the time of writing, hibernate-annotations.jar and the API stubs in ejb3-persistence.jar were required.) Now delete the src/hello/Message.hbm.xml file. You ll replace this file with annotations in the src/hello/Message.java class source, as shown in listing 2.10.

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Auditing is a process that tracks both user activities and Windows XP Professional activities on a computer and records these events in the security log.