By Joseph Ottinger , Jeff Linwood, Dave Minter
Get begun with the Hibernate five endurance layer and achieve a transparent creation to the present common for object-relational patience in Java. This up-to-date variation comprises the recent Hibernate 5.0 framework in addition to insurance of NoSQL, MongoDB, and different comparable applied sciences, starting from purposes to special info. Beginning Hibernate is perfect if you’re skilled in Java with databases (the conventional, or attached, approach), yet new to open-source, light-weight Hibernate.
The ebook retains its concentrate on Hibernate with out losing time on nonessential third-party instruments, so you’ll be capable of instantly commence construction transaction-based engines and functions. skilled authors Joseph Ottinger with Dave Minter and Jeff Linwood offer extra in-depth examples than the other publication for Hibernate newbies. They current their fabric in a full of life, example-based manner—not a dry, theoretical, hard-to-read fashion.
What you are going to Learn
Who This ebook Is For
Experienced Java builders drawn to studying tips to use and follow object-relational patience in Java and who're new to the Hibernate endurance framework.
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Additional info for Beginning Hibernate: For Hibernate 5
Most coders will (and should) prefer the annotation-based mappings. 12 13 Darn it, we keep on coming across that JDBC code that isn’t supposed to be mentioned. com/dictionary/schema. 16 CHAPTER 2 ■ INTEGRATING AND CONFIGURING HIBERNATE Connection Pooling As you’ve seen, Hibernate uses JDBC connections in order to interact with a database. Creating these connections is expensive — probably the most expensive single operation Hibernate will execute in a typical-use case. Since JDBC connection management is so expensive, you can pool the connections, which can open connections ahead of time (and close them only when needed, as opposed to “when they’re no longer used”).
An exception also indicates a failure, unless we tell TestNG that we expect an exception to be thrown (and we can also tell TestNG what specific types of exceptions allow the test to pass). You're likely to use this construct often because it's easy to integrate into your project build life cycle (as Maven runs the available tests as part of the build). Also, it gives you a clear order of execution, and also provides an easy way to see what works and what doesn't work. You should feel free to write tests to validate your own understanding of what is being described.
In general, you can (and should) use what you like; this book uses Maven because of how common it is, not because it's the One True Build Tool. Let's look at the actual code we've been running so far and explain it all. That will give you a basis for future discussion, even if you're not going to use it much beyond this chapter. xml file; we're going to start in the chapter02 directory (which is a clone of the chapter01 directory, except with “chapter02” instead of “chapter01”). xml) is very simple, specifying only the parent project and the current project's name (see Listing 2-2).
Beginning Hibernate: For Hibernate 5 by Joseph Ottinger , Jeff Linwood, Dave Minter