Designing Enterprise Applicationswith the J2EETM Platform 2nd phần 4 pdf

... > Code Example 4. 10 The Template JSP Page for the Layout Shown in Figure 4. 8 The JSP page includes the page named by the insert tag’s parameter attribute at the point where the tag occurs. A ... (as is often the case), the database can become a performance bottleneck. The contain- DEA2e.book Page 1 24 Friday, March 8, 2002 12:31 AM CHAPTER 5 THE ENTERPRISE JAVA...

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... it to the end of this project without the support of Suzy Pelouch who did an excellent job at pulling together all the pieces. The authors of the J2EE specifications and the developers of the reference implementation ... influ- enced the choices made in developing the sample application: • The need to make rapid and frequent changes to the “look” of the application • T...

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... AM PLATFORM SERVICES 41 With basic authentication, the Web server authenticates a principal using the user name and password obtained from the Web client. Like basic authentication, digest authentication ... J2EE PLATFORM TECHNOLOGIES 40 attributes in the enterprise bean’s deployment descriptor. The attributes indicate whether the bean or container will manage the bean...

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... AM CHAPTER 4 THE WEB TIER 106 the screen flow manager to display screen signoff.screen after the action com- pletes. Figure 4. 4 shows the result of an HTTP POST to the URL /signoff.do. Figure 4. 4 OID ... perform method. 4. The SignoffHTMLAction object calls the model method that signs the user out of the application. 5. The controller asks the screen flow manager...

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... bean types, there are other design choices that you need to make when developing objects for the EJB tier. These choices include the types of objects that should be enterprise beans, and the role an enterprise ... databases. The principal advantage of data access objects is that they decouple the user of the object from the programming mechanism that accesses the underlyin...

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... declared enterprise bean reference. This means that the target enterprise bean must be of the type indicated in the ejb-ref- type element and that the home and remote elements of the target enterprise ... either empty (meaning that the root of the Web application is the root of the Web server namespace) or it both begins with a slash and does not end with one. • The...

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... demonstrates the user’s right to claim the identity as its own. This section describes the various authentication mechanisms supported by the J2EE platform and how to configure them. 9.2.2.1 Web Tier Authentication An ... to the enterprise bean’s methods. 3. Set up the transaction environment for the enterprise bean according to its de- ployment descriptor. This is needed...

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... allow the caller to proceed. If not, the component can prevent the caller from further interaction. The caller principal returned by a container depends on the authentication mechanism used by the ... identity, then the J2EE application can implement secure access to the resource by limiting who can use the accessor. If the mapping of authentication context is many-to-many...

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... application such as the sample application, including: • The client tier provided by the browser • The Web tier provided by the server • The EJB tier provided by the server • The enterprise information ... 10 .4 shows an Item table that joins with an ItemDetails table. The primary key of the ItemDetails table includes both the ID of the item being described and the...

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... 2002 12:31 AM INDEX 40 8 name space management 248 remote accessibility 247 single point of entry 246 undeployment capability 247 requirements 242 digest authentication See authentication, digest distributed ... to enterprise bean instances 136 EJB JAR files 210 EJB QL 147 bean-managed persistence 150 find methods 147 FROM clause 147 guidelines 148 SELECT clause 147 select method...

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