Datasheet

Patrick c01.tex V3 - 09/18/2009 12:15pm Page 30

Chapter 1: Building Web Applications in WebLogic

Viewing Generated Servlet Code

Viewing the servlet code generated for a particular JSP page can be instructive while learning JSP tech-

nology and useful during the testing and debugging process. Often the error report received during the

execution of the JSP page indicates the line in the generated servlet code, but ﬁnding the JSP scriptlet

code or tag that caused the error requires inspection of the Java code.

Generated Java servlet code will be kept alongside the generated servlet class ﬁles if the

keepgenerated

parameter is set to

true

in the

<jsp-descriptor>

section of the

weblogic.xml

descriptor ﬁle. The equiv-

alent option for keeping the generated Java code for JSP pages compiled using the

weblogic.appc

utility

wlappc

Ant task is

keepgenerated

placed on the command line or within the Ant task invocation.

By default, the generated servlet classes and Java code will be placed in a temporary directory struc-

ture located under the domain root directory. The name of this temporary directory depends on the

names of the server, enterprise application, and web application, and it typically looks something like

servers/myserver/tmp/_WL_user/_appsdir_myapp_dir/wx8qxk/jsp_servlet

. This default location

may be overridden using the

<working-dir>

option in the

weblogic.xml

descriptor ﬁle.

Chapter Review

In this chapter we reviewed the key concepts related to web applications in WebLogic Server and pre-

sented a number of important best practices designed to improve the quality and performance of your

web applications.

Most of this chapter has been at the detailed design and implementation level, the trees, in a sense. In the

next two chapters we step back and look at the forest for a few minutes by examining the importance of

the overall web application architecture, the selection of a suitable presentation template technique, and

the application of a model-view-controller pattern and framework for form and navigation handling.