Sun's new light-weight Java company version (EE) five is a very strong platform for constructing enterprise-level Java-based purposes, basically for the server. This e-book exhibits you the way to harness that strength, analyzing how the items of the hot Java EE five platform healthy jointly, together with the newly redesigned annotations-driven EJB three spec in addition to JavaServer Faces (JSF), built-in into the platform for the 1st time.Hands-on tutorials also are integrated, besides transparent reasons and dealing code examples. you'll develop to take the following stepfrom writing client-side computing device functions to writing firm purposes. additionally, you will use the person APIs and instruments within the Java EE five platform, and the way to merge those to create your individual firm functions.
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Additional resources for Beginning Java EE 5: From Novice to Professional
Note Servlets were not the first technology designed to enhance web servers. One of the earlier solutions is known as the Common Gateway Interface (CGI). CGI provided a means for a server to call an external process that performed additional work for the server. If you’ve done any web application programming using CGI, you’ll be familiar with the limitations of that mechanism, including lack of portability (CGI programs were often written in C) and no intrinsic support for session management (a much-overused example is the ability to maintain a list of items in a virtual shopping cart).
That means that applications written for Java EE will run on any number of Java EE-compliant implementations. The reference implementation supplied with the Java EE Software Development Kit from Sun (Java EE SDK) provides a working model that we’ll use throughout this book, since it’s the implementation that Sun has built from the specification and is freely available. In the next chapter, you’ll get an introduction to installing and testing the Java EE SDK. Multitier Architecture One of the recurring themes that you’ll run into with Java EE is the notion of supporting applications that are partitioned into several levels, or tiers.
Book Page 24 Saturday, October 1, 2005 6:14 AM 24 CHAPTER 1 ■ JAVA EE ESSENTIALS Figure 1-14. An application client can be implemented as a normal Java application based on Swing or AWT, or even as a console application. The client communicates with EJBs in the business tier. JSP Client with EJB Figure 1-15 shows an architecture based on JSPs. JSPs on the server interface with the business layer in response to requests. The response is generated as a web page, which is sent to the client’s web browser.
Beginning Java EE 5: From Novice to Professional by KevinMukhar;JimCrume;JamesLWeaver&ChrisZelenak