By Debu Panda, Reza Rahman, Ryan Cuprak, Michael Remijan
ISBN-10: 1935182994
ISBN-13: 9781935182993
The EJB three framework offers a regular technique to trap company common sense in achievable server-side modules, making it more straightforward to put in writing, continue, and expand Java EE purposes. EJB 3.2 offers extra improvements and clever defaults and integrates extra totally with different Java applied sciences, similar to CDI, to make improvement even more straightforward. EJB three in motion, moment variation is a fast moving educational for Java EE company part builders utilizing EJB 3.2, JPA, and CDI. It tackles EJB head-on via quite a few code samples, real-life eventualities, and illustrations. past the fundamentals, this publication comprises inner implementation information, most sensible practices, layout styles, functionality tuning suggestions, and numerous technique of entry together with internet providers, leisure prone, and WebSockets.
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Additional resources for EJB 3 in Action, 2nd Edition
Example text
It automatically persists Java objects using a technique called object-relational mapping (ORM). ORM is the process of mapping data held in Java objects to database tables using configuration or declaratively using annotations. It relieves you of the task of writing low-level, boring, and complex JDBC code to persist objects into a database. info Related specifications 13 An ORM framework performs transparent persistence by making use of ORM metadata that defines how objects are mapped to database tables.
After this section, the rest of the chapter explores some of the important features of these technologies, using examples from the ActionBazaar application to introduce you to some of the EJB bean types and show how they’re used with CDI and JPA 2. Let’s begin by taking a look at the requirements and design of the example. 1 Starting with the architecture For the purposes of introducing EJB 3, let’s focus on a small subset of ActionBazaar functionality in this chapter—starting from bidding on an item and ending with ordering the item won.
NET framework. In this section, we’ll point out a few of the compelling EJB 3 features that we feel certain will have this latest version at the top of your short list. EASE OF USE Thanks to the unwavering focus on ease of use, EJB 3 is probably the simplest serverside development platform around. The features that shine the brightest are POJO programming, annotations in favor of verbose XML, heavy use of sensible defaults, and avoidance of complex paradigms. Although the number of EJB services is significant, you’ll find them very intuitive.
EJB 3 in Action, 2nd Edition by Debu Panda, Reza Rahman, Ryan Cuprak, Michael Remijan
by Daniel
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