NonStop Servlets for JavaServer Pages (NSJSP) 7.0 System Administrator's Guide

Introduction to NSJSP

NonStop Servlets for JavaServer Pages (NSJSP) 7.0 System Administrator’s Guide—674372-005

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Architecture

In Figure 1-6, $zweb and $yweb denote two PATHMONs configured in a Pathway

domain. The iTP Secure WebServer and the NSJSP installations are distributed

across both PATHMONs. The NSJSP processes running in the Servlet Server

Class are divided between the two PATHMONs. User requests can be routed to

the processes under each PATHMON. If one PATHMON needs to be upgraded or

if the processes in one PATHMON are stopped, the processes in the other

PATHMON can continue to service the requests, thereby ensuring that NSJSP

application services are continuously available.

Architecture

This section discusses the relevant components of Apache Tomcat that will help

describe how Apache Tomcat was ported onto the HP NonStop platform as NSJSP,

and the NSJSP architecture.

Figure 1-6. NSJSP in an iTP Secure WebServer Environment Configured for

Online-Upgrade

HTTPRequests

DOMAIN

iTP

Secure

WebSer ver

HTTPD

$zweb

$yweb

NSJSP Installation

HTTPD

PathsendorFilesystemAPI

NSJSP

NSJSPNSJSPNSJSP