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ContextEnterprise beans encapsulate business logic and business data and expose theirinterfaces, and thus the complexity of the distributed services, to the client tier.ProblemIn a multitiered Java 2 Platform, Enterprise Edition (J2EE) application environment,the following problems arise:Tight coup ...
ContextApplication clients need to exchange data with enterprise beans.ProblemJava 2 Platform, Enterprise Edition (J2EE) applications implement server-sidebusiness components as session beans and entity beans. Some methods exposed by thebusiness components return data to the client. Often, the clie ...
ContextA multi-tiered, distributed system requires remote method invocations to send andreceive data across tiers. Clients are exposed to the complexity of dealing with distributedcomponents.ProblemPresentation-tier components interact directly with business services. This directinteraction exposes ...
ContextSystem controls flow of execution and access to presentation processing, which isresponsible for generating dynamic content.NoteThe Dispatcher View pattern, like the Service to Worker pattern, describes a commoncombination of other patterns from the catalog. Both of these macro patterns desc ...
ContextThe system controls flow of execution and access to business data, from which itcreates presentation content.NoteThe Service to Worker pattern, like the Dispatcher View pattern, describes a commoncombination of other patterns from the catalog. Both of these macro patterns describe thecombinati ...
ContextThe presentation-tier request handling mechanism must control and coordinateprocessing of each user across multiple requests. Such control mechanisms may bemanaged in either a centralized or decentralized manner.ProblemThe system requires a centralized access point for presentation-tier reques ...
ContextSophisticated Web pages present content from numerous data sources, using multiplesubviews that comprise a single display page. Additionally, a variety of individuals withdifferent skill sets contribute to the development and maintenance of these Web pages.ProblemInstead of providing a mecha ...
ContextThe system creates presentation content, which requires processing of dynamicbusiness data.ProblemPresentation tier changes occur often and are difficult to develop and maintain whenbusiness data access logic and presentation formatting logic are interwoven. This makes thesystem less flexibl ...
Context The presentation-tier request handling mechanism receives many different types ofrequests, which require varied types of processing. Some requests are simply forwarded tothe appropriate handler component, while other requests must be modified, audited, oruncompressed before being fur ...