Download PDF by Jeffrey Sambells, Michael Purvis, Cameron Turner: Beginning Hibernate: From Novice to Professional

By Jeffrey Sambells, Michael Purvis, Cameron Turner

ISBN-10: 1590597079

ISBN-13: 9781590597071

starting Hibernate is perfect if youre skilled in Java with databases (the conventional, or "connected," approach), yet are new to open resource light-weight Hibernatethe preferred de facto object-relational mapping and database-oriented program improvement framework. This booklet packs in fresh information regarding the most recent unlock of the Hibernate 3.2.x patience layer and offers a transparent creation to the present regular for object-relational patience in Java.

Experienced writer Dave Minter and contributor Jeff Linwood offer extra in-depth examples than the other books for Hibernate rookies. The authors additionally current fabric in a full of life, example-based mannernot in a dry, theoretical, hard-to-read type. and because the e-book retains its concentrate on Hibernate with no losing time on nonessential third-party instruments, youll be capable of instantly commence construction transaction-based engines and applications.

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Additional resources for Beginning Hibernate: From Novice to Professional

Example text

Listing 1-5 shows the file mapping the Message POJO into the database. Listing 1-5. dtd"> It would be reasonable to ask if the complexity has simply been moved from the application code into the XML mapping file. But, in fact, this isn’t really the case for several reasons. First, the XML file is much easier to edit than a complex population of a POJO from a result set—and far more easily changed after the fact should your mappings into the database change at a late stage of development.

Hibernate constructs a File object out of the path and then passes it to addCacheableFile(File). • addDocument(Document): Takes a valid DOM Document object containing the XML. The addJar() and addDirectory() methods are the most convenient, because they allow you to load all of your Hibernate mapping documents at one time. Both of these methods simplify code configuration, layout, and refactoring, because you do not have to separately maintain code that configures each document. We find that it is easy to create a mapping document and then forget to add it to your application’s Hibernate initialization code; using either of these methods helps to avoid that problem.

Qxd 18 8/2/06 9:33 PM Page 18 CHAPTER 2 ■ INTEGRATING AND CONFIGURING HIBERNATE Table 2-1. fetch_size Determines how many rows the JDBC connection will try to buffer with every fetch. This is a balance between memory and minimizing database network traffic. use_get_generated_keys Determines Hibernate’s behavior with respect to generated keys. 0 generated keys API, Hibernate will retrieve generated keys from the statement after it executes an SQL query. use_scrollable_resultset Determines whether Hibernate will use JDBC scrollable result sets for a user-provided JDBC connection.

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Beginning Hibernate: From Novice to Professional by Jeffrey Sambells, Michael Purvis, Cameron Turner


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