New PDF release: Designing Enterprise applications with the J2EE platform

By Inderjeet Singh

ISBN-10: 0201787903

ISBN-13: 9780201787900

As a part of the extremely popular Java BluePrints application, Designing company functions with the J2EET Platform, moment version, describes the main architectural and layout matters in purposes supported by way of the J2EET platform and gives functional directions for either architects and builders. It explores key J2EE platform beneficial properties equivalent to Java servlets, JavaServer PagesT, and company JavaBeansT part versions, in addition to the JDBCT API, Java Message provider API, and J2EE Connector structure. It additionally discusses safety, deployment, transaction administration, internationalization, and different vital concerns for modern-day applications.Through code samples and a whole e-commerce software instance, this booklet presents concrete instructions to getting to know the J2EE platform. Highlights contain: * An advent to the J2EE platform, the functions it helps, and the applied sciences it presents * Discussions on the best way to layout Web-based functions utilizing Java servlet and JavaServer Pages applied sciences * Architectural guidance for designing company JavaBeans elements for scalability, reliability, and function * tips to attach J2EE purposes to current structures and purposes utilizing JDBC and J2EE Connector applied sciences * layout motivations in the back of the commonly used Java puppy shop demo program * A thesaurus of J2EE and firm computing terminology

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As a part of the very popular Java BluePrints software, Designing company purposes with the J2EET Platform, moment variation, describes the main architectural and layout matters in purposes supported by way of the J2EET platform and provides sensible instructions for either architects and builders. It explores key J2EE platform positive aspects resembling Java servlets, JavaServer PagesT, and company JavaBeansT part versions, in addition to the JDBCT API, Java Message provider API, and J2EE Connector structure.

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4 INTRODUCTION Scales Easily J2EE containers provide a mechanism that supports simplified scaling of distributed applications, with no application development effort. Because J2EE containers provide components with transaction support, database connections, life cycle management, and other features that influence performance, they can be designed to provide scalability in these areas. For example, containers may pool database connections, providing clients with quick, efficient access to data. Because containers may run on multiple systems, Web containers can automatically balance load in response to fluctuating demand.

For example, separate servlets will see the same state of a client session even if they each start their own transaction. 3 Enterprise Bean Transactions The J2EE platform provides two styles of transaction demarcation for enterprise beans: bean-managed and container-managed. With bean-managed transaction demarcation, the enterprise bean is required to manage all aspects of a transaction. This entails operations such as: • Creating the transaction object • Explicitly starting the transaction • Completing the transaction, either by committing the transaction when all updates are completed or rolling back the transaction if an error occurs With container-managed transaction demarcation, the EJB container handles transaction management.

3 Platform Services J2EE platform services simplify application programming and allow components and applications to be customized at deployment time to use resources available in the deployment environment. This section gives a brief overview of the J2EE platform naming, deployment, transaction, and security services. 3 on page 43). A naming environment allows a component to be customized without the need to access or change the component’s source code. A container implements the component’s environment and provides it to the component as a JNDI naming context.

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Designing Enterprise applications with the J2EE platform by Inderjeet Singh


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