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A computer running Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, or Windows Server 2003 R2, with all available updates installed. Microsoft .NET Framework 3.5 SP1. Microsoft Office Word 2007 or Word 2003 SP2. Microsoft Office Excel 2007 or Excel 2003 SP2. Microsoft Office PowerPoint 2007. Microsoft Office Primary Interop Assemblies for Word and Excel.

Windows Installer Package file, and ProductCode is the globally unique identifier (GUID) of the Windows Installer package. For a complete listing of switches, see Help And Support Center.

The lifecycle and states of objects Working with the Hibernate API Working with the Java Persistence API

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You now have an understanding of how Hibernate and ORM solve the static aspects of the object/relational mismatch. With what you know so far, it s possible to solve the structural mismatch problem, but an efficient solution to the problem requires something more. You must investigate strategies for runtime data access, because they re crucial to the performance of your applications. You basically have learn how to control the state of objects. This and the following chapters cover the behavioral aspect of the object/relational mismatch. We consider these problems to be at least as important as the structural problems discussed in previous chapters. In our experience, many developers are only really aware of the structural mismatch and rarely pay attention to the more dynamic behavioral aspects of the mismatch. In this chapter, we discuss the lifecycle of objects how an object becomes persistent, and how it stops being considered persistent and the method calls and other actions that trigger these transitions. The Hibernate persistence manager, the Session, is responsible for managing object state, so we discuss how to use this important API. The main Java Persistence interface in EJB 3.0 is called EntityManager, and thanks to its close resemblance with Hibernate APIs, it will be easy to learn alongside. Of course, you can skip quickly through this material if you aren t working with Java Persistence or EJB 3.0 we encourage you to read about both options and then decide what is better for your application. Let s start with persistent objects, their lifecycle, and the events which trigger a change of persistent state. Although some of the material may be formal, a solid understanding of the persistence lifecycle is essential.

Parameter {package|ProductCode} Package {package|ProductCode} [u|m]package] Description Installs or configures a product For example: msiexec /i a:\sample.msi Administrative installation option For example: msiexec /a a:\sample.msi Uninstalls a product For example: msiexec /x sample.msi Advertises a product, as follows: u Advertises to the current user m Advertises to all users For example: msiexec /jm sample.msi The path to the log file. The parameters specify what to log, as follows: i Log status messages w Log nonfatal warnings e Log all error messages a Log all startup actions r Log action-specific records u Log user requests c Log initial user interface parameters m Log out of memory p Log terminal properties v Log verbose output + Append to existing file ! Flush each line to the log * Log all information except the v option (wildcard) To include the v options, specify /L*v

If the installation process stops before completing, either Windows Installer was unable to read the package, or conditions on your computer prevented it from installing the application. Open Event Viewer and review the Application log.

Because Hibernate is a transparent persistence mechanism classes are unaware of their own persistence capability it s possible to write application logic that is unaware whether the objects it operates on represent persistent state or temporary state that exists only in memory. The application shouldn t necessarily need to care that an object is persistent when invoking its methods. You can, for example, invoke the calculateTotalPrice() business method on an instance of the Item class without having to consider persistence at all; e.g., in a unit test. Any application with persistent state must interact with the persistence service whenever it needs to propagate state held in memory to the database (or vice versa). In other words, you have to call Hibernate (or the Java Persistence) interfaces to store and load objects.

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