What is multitiered application? Summary documentation from Sun to Pet Store Examples?
Partitioning a design into tiers allows designers to choosethe appropriate technology for a given situation. The JavaPet Store demo, illustrates how its design is divided intomultiple tiers. Using a layered approach to design allows designers to use appropriate for the specific situation of technology. An example of this Java pet store shows how to divide a multi-layer structure.
The Client tier is often the only part of the application theuser sees. The Java Pet Store demo Client tier consists of abrowser displaying web pages generated from JSP pages in theWeb tier. An administrator interface uses a spreadsheet client, such as StarOffice software, to communicate With the web tierxml message. The Client Tier Communicates WITHER TIERSTHROUGH Defined Interfaces. The client layer is usually part of the user's only application. The customer layer of this pet store is a browser that is responsible for displaying the web page generated by the JSP page in the web layer. One administrator interface can use a spreadsheet client (such as a StarOffice software) to exchange XML messages in the web layer. The client layer interacts through the defined interface and other layers.
The Web tier performs web-related processing, such as servingHTML, instantiating web page templates, and formatting JSP pagesfor display. Some objects within the Web tier act as proxies tocomponents in the Enterprise JavaBeans components tier.Web layer is responsible for Web-related processes, such as Provide HTML services, generating the works of templates for web pages, formatting JSP pages to display. Some items in the web layer can be used as a proxy for components in the EJB component layer.
The Enterprise JavaBeans components tier is responsible for anyprocessing involving Enterprise JavaBeans components. EnterpriseJavaBeans components contain the business logic of the Java PetStore demo, such as processing orders. EJB components alsorepresent the model objects of the Java Pet Store demo, includingAccount and placed Orders.EJB The component layer is responsible for any processing related to the EJB component. The EJB component contains this Java pet store commercial logic, such as handling orders. The EJB component also contains the object model of this Java pet store, including accounts and processed orders.
Stand-alone clients and web applications in the Web tier can useEnterprise JavaBeans components hosted by the Enterprise JavaBeanscomponents tier. The Java Pet Store demo demonstrates the properuse of Enterprise JavaBeans components. Stand-alone client and the network layer of web applications using EJB EJB components in the component layer. An example of this Java pet store shows how to properly use EJB components. The Enterprise Information System (EIS) tier provides a layer ofsoftware that maps existing data and application resources intothe design of a J2EE application in an implementation-neutral way.The EIS tier can also access applications of other organizationsor businesses, providing seamless business-to- The Business Integration. A layer of software provides a layer of software that maps existing data and application resources to a J2EE application in a manner that is unrelated to the implementation. The EIS layer passes the seamless integration of B2B, allowing other tissue or commercial institutions to be used.
