Download e-book for kindle: Applying Enterprise JavaBeans 2.1: component-based by Vlada Matena


By Vlada Matena

ISBN-10: 0201914662

ISBN-13: 9780201914665

As an authoritative source for utilizing firm JavaBeans (EJB) successfully to construct and combine even the most important platforms, utilizing firm JavaBeans presents what IT managers and builders have to undertake this robust part regular effectively in new Java projects.Most books approximately EJB are robust on thought, yet are inclined to pass over many information of the way to enforce elements in genuine tasks. that is the place this article steps in, offering actual code (and genuine layout judgements) for enforcing other kinds of JavaBeans, like consultation and entity Beans. greater but, it incorporates a case examine of a human assets merits enrollment process that integrates facts from various owners and makes use of EJB to carry the information jointly. (Using fictitious seller names like "Star Enterprise," "Wombat," and "Providence," the ebook exhibits how EJB may end up in winning firm integration.)Subsequent chapters examine diversified elements of the program, from consultation Beans (including stateful Beans used to regulate periods) to particular examples of entity Beans in motion. there are many kingdom transition diagrams (that express the interior workings of EJB in quite a few eventualities) and resource code (useful for Java developers). with out really anchoring this fabric in an exact program server (which might make the publication much more practical), it does a very good task of fleshing out the EJB commonplace for actual tasks, exposing what rather is going on among software server "containers" and the Beans they deal with, together with activation and passivation states.

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Another example demonstrated the key parts of the deployment descriptor, particularly the information that it contains about each enterprise bean. Beneath these enterprise beans and applications is the container. It is the container's services and tools that complete the operational environment. The chapter explained the runtime services provided by the container and summarized their benefits. Chapter 4, Working with Session Beans, brings this theoretical discussion to life, using a real-world enterprise application example.

1 Local and Remote Client Views Both session and entity beans can implement local and remote client views. The choice of whether to implement an enterprise bean with a local or a remote client view depends on a number of considerations, most of which apply to both session and entity beans. However, when developing entity beans, you should also consider persistence and relationship handling. Entity beans that are targets of container-managed relationships must use a local client view. Chapter 7 addresses issues specific to entity beans.

Pooling logic. For entity beans An enterprise with bean can be container-managed adapted at persistence, the deployment to container generates work with the data access existing logic. customers' databases. Enterprise The container bean provides administration tools applications to manage deployed are manageable at applications. runtime. The bean developer does not have to develop the administration support as part of the application. The container can The bean provide automatic developer does restart of a failed not code any transaction or failure recovery or application.

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Applying Enterprise JavaBeans 2.1: component-based development for the J2EE platform by Vlada Matena

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