iTP Secure WebServer System Administrator's Guide (iTPWebSvr 6.0+)

Using NonStop Servlets for JavaServer Pages

(NSJSP)

iTP Secure WebServer System Administrator’s Guide—523346-002

9-8

The Web Application

The web application is a collection of servlets, HTML, images, JavaServer Pages, a

deployment descriptor and other configuration files that together represent all the

resources necessary to host a complete application on a J2EE-compliant web server.

Web applications should be located in a directory under the root directory of the

container engine (our default for the root is /usr/tandem/webserver/

servlet_jsp), typically called webapps.

Assume you have an application called myapp1 and that one of the servlets in that

application is called helloworld.

The directory structures are as follows

/servlet_jsp/webapps/myapp1

where myapp1 is the name of your web application directory.

At this level you can store files such index.html, or create subdirectories to manage

your web application resources, for example, /images for graphics files.

The WEB-INF Subdirectory

The WEB-INF subdirectory contains private files, that is, files that cannot be directly

served to the user for rendering by the browser. These are typically java class files. To

deploy any servlets you must create the WEB-INF subdirectory. This directory contains

the /classes subdirectory where you store the compiled classes, the lib

subdirectory and your customized version of the web.xml file - the deployment

descriptor.

webapps/myapp1/WEB-INF/web.xml

webapps/myapp1/WEB-INF/classes/helloworld.class

webapps/myapp1/WEB-INF/lib

A detailed description of the directory structure can be found in Configuring the Web

Application on page 9-24.

The Deployment Descriptor

There is a “default” version of web.xml that is used to set the base default contexts

and MIME types for all servlets, and can preload and start up servlets when the web

container is first started. If you have a custom web.xml file for your particular servlet

or JSP, as shown in the greetings application directory structure above, that version

overrides the default.

On the iTPWebServer, the default version of web.xml is located in the following