rdlc barcode 128

rdlc barcode 128

rdlc code 128

rdlc code 128

rdlc barcode 128

rdlc barcode 128,

rdlc code 128,
rdlc barcode 128,
rdlc barcode 128,

rdlc barcode 128,
rdlc barcode 128,
rdlc barcode 128,
rdlc code 128,
rdlc code 128,
rdlc barcode 128,
rdlc code 128,
rdlc barcode 128,
rdlc barcode 128,
rdlc barcode 128,

rdlc barcode 128,
rdlc code 128,
rdlc barcode 128,
rdlc code 128,
rdlc barcode 128,
rdlc code 128,
rdlc code 128,
rdlc code 128,
rdlc code 128,
rdlc code 128,
rdlc code 128,
rdlc code 128,
rdlc barcode 128,
rdlc barcode 128,
rdlc barcode 128,

rdlc barcode 128,
rdlc barcode 128,
rdlc code 128,
rdlc code 128,
rdlc code 128,
rdlc barcode 128,
rdlc barcode 128,
rdlc barcode 128,
rdlc barcode 128,
rdlc barcode 128,
rdlc code 128,
rdlc barcode 128,
rdlc code 128,
rdlc barcode 128,
rdlc code 128,
rdlc code 128,
rdlc barcode 128,
rdlc barcode 128,
rdlc code 128,
rdlc code 128,
rdlc code 128,
rdlc barcode 128,
rdlc barcode 128,
rdlc code 128,
rdlc barcode 128,
rdlc code 128,
rdlc code 128,
rdlc barcode 128,
rdlc barcode 128,
rdlc code 128,
rdlc code 128,
rdlc barcode 128,
rdlc barcode 128,
rdlc code 128,
rdlc barcode 128,
rdlc code 128,
rdlc code 128,
rdlc code 128,
rdlc code 128,
rdlc code 128,
rdlc barcode 128,
rdlc code 128,
rdlc barcode 128,
rdlc barcode 128,
rdlc barcode 128,
rdlc code 128,
rdlc code 128,
rdlc barcode 128,
rdlc barcode 128,
rdlc code 128,

n the final part of this book, we explore some of the issues you are bound to come across while using EJB 3 in the real world. These advanced topics are primarily geared toward migration, system integration, and interoperability. If you are already using EJB 2 and are looking at EJB 3, chapter 14 is critically important to you. The chapter discusses migrating from EJB 2 to EJB 3 in great detail. We first see how EJB 2 and EJB 3 can coexist in the short run if necessary. We then look at migrating EJB 2 session beans and MDBs to EJB 3, followed by migrating applications using EJB 2 CMP entity beans, JDBC DAOs, and proprietary O/R frameworks such as Hibernate/TopLink to JPA. In chapter 15, we move on to the red-hot topic of enabling interoperability through web services. In this chapter we show you how EJB 3 and web services can help integrate Java EE with other disparate technologies such as Microsoft .NET. You ll learn how EJB 3 and web services relate to each other and how stateless session beans can be exposed as web services utilizing Java XML Web Service ( JAX-WS) 2.0 support. Finally, we tackle what very well might be the most intriguing topic of the book: Spring and EJB 3. EJB 3 and the Spring framework are often viewed as competing frameworks. In chapter 16, we present a slightly different take on things. We show you how EJB 3 opens the door to the possibility of integrating with Spring in several ways and combining the power of both of these technologies.

In this book, when we talk about EJBs, we are referring to the server-side components that you can use to build parts of your application, such as the business logic or persistence code. Many of us tend to associate the term component with developing complex and heavyweight CORBA, Microsoft COM+ code. In the brave new world of EJB 3, a component is what it ought to be nothing more than a POJO with some special powers. More importantly, these powers remain invisible until they are needed and don t distract from the real purpose of the component. You will see this firsthand throughout this book, especially starting with chapter 2. The real idea behind a component is that it should effectively encapsulate application behavior. The users of a component aren t required to know its inner workings. All they need to know is what to pass in and what to expect back.

esign patterns offer generic solutions for recurring design problems. Most developers who use object-oriented programming are familiar with their use. Patterns are not specific to a particular language; in fact, most of the problems they tackle are not even specific to a particular programming paradigm. Consequently, many design problems usually resolved through object-oriented programming can be solved using AOP. The core design patterns became popular in 1995 with Addison-Wesley s publishing of Elements of Reusable Object-Oriented Software by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides (commonly known as the Gang of Four, or GoF). Although several other design patterns have been defined since then, most are based on this work. This chapter aims to redefine selected design patterns with the aspect-oriented approach. We compare these redefined patterns with their object-oriented definitions so that the advantages of AOP will be highlighted. The first section of this chapter gives a quick introduction to these reusable models. We then present and discuss the design patterns that show the most significant modularity improvements with an AOP implementation.

To generate the XML for a message selector, add the message-selector attribute to the class-level @ejb.bean XDoclet tag for your message-driven bean class. The following code does this for the MessageBean class:

There are three types of EJB components: session beans, message-driven beans, and entities. Session beans and message-driven beans are used to implement business logic in an EJB application, and entities are used for persistence. Components can be reusable. For instance, suppose you re in charge of building a website for an online merchant that sells technology books. You implement a module to charge the credit card as part of a regular Java object. Your company does fairly well, and you move on to greener pastures. The company then decides to diversify and begins developing a website for selling CDs and DVDs. Since the deployment environment for the new site is different, it can t be located on the same server as your module. The person building the new site is forced to duplicate your credit card module in the new website because there s no easy way to access your module. If you had instead implemented the credit card charging module as an EJB component as shown in figure 1.1 (or as a web service), it would have been much easier for the new person to access it by simply making a call to it when she needed that functionality. She could have reused it without having to understand its implementation. Given that, building a reusable component requires careful planning because, across enterprise applications within an organization, very little of the business logic may be reusable. Therefore, you may not care about the reusability of EJB components, but EJB still has much to offer as a framework, as you ll discover in the next section.

Figure 1.1 EJB allows development of reusable components. For example, you can implement the credit card charging module as an EJB component that may be accessed by multiple applications.