NonStop Servlets for JSP System Administrator's Guide

Configuring NSJSP

NonStop Servlets for JavaServer Pages (NSJSP) System Administrator’s Guide—525644-001

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servlet.config

This file contains the configuration information required for the SERVLET ServerClass

and the filemap. The file is located (by default) in /usr/tandem/webserver/conf.

When you run a new installation (of T1222) for the first time, for security purposes, the

setup script automatically makes a backup of any pre-existing servlet.config file.

You can then make any changes to the default, such as adding filemaps.

Environment Variables

You may need to change the SERVLET_JSP_HOME environment variable. It must be

set, as follows:

set env(NSJSP_HOME) /usr/tandem/webserver/servlet_jsp

Filemaps

For each new application (a collection of related servlets, JSP and other resources)

you may need to add a corresponding filemap in the servlet.config file.

For example, assume you have a new application called orders. You can access it

while the default path is /servlet_jsp/orders or add the following filemap.

Filemap /orders $server_objectcode

Server Directive

Among many other entries, Numstatic and Maxservers are set in the server

directive. The default situation is that both are set to 1, because the NSJSP process is

multi-threaded.

To support sessions, all processes in the web container must be static, if you are not

using persistent sessions. That is, the Numstatic and Maxservers attributes of the

web container must have the same value. If the values are not equal, the LINKMON

will bring up additional dynamic Servlet server processes based on the system load. If

a dynamic Servlet server process is shut down because the system load has

decreased, all the session data it contained will be lost.

The following entries must not be changed:

Arglist

The arglist parameter in the server directive has been used to specify the

following configuration:

The class file which the NSJSP server process loads immediately upon startup.

com.tandem.servlet.NSJSPBootstrap

Note. You cannot configure and manage multiple instances of the SERVLET ServerClass.