By Smith T., Wright B.
This advisor lias been written for numerous audiences. They include■ Java developers■ Oracle builders now not acquainted with Java■ managersJava builders who're used to a Java J2EE setting must have little or no difficulty constructing functions for the Oracle Servlet Engine. despite the fact that, because the 05E rims in a digital JVM in an Oracle database consultation, there are ideas and strategies mentioned during this consultant so that you can comprehend to facilitate OSE program development.Oracle database builders who're acquainted with PL/SQL and different non-Java programming environments may still learn the evaluation of Java and object-oriented options mentioned within the first a part of this consultant. for additional information approximately Java, see "Information assets' on web page -xiv.
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Extra resources for Oracle9i Servlet Engine Developer's Guide
So in effect the threading is being done at the server level, and each servlet executes in its own virtual JVM. So, each thread of a multithreaded servlet cannot cache static information that is available to other threads. One JVM, one thread of control. The following statement from the Oracle9i Java Developer’s Guide (page 1-13) summarizes the special way that the OJVM operates: 2-6 Oracle9i Servlet Engine Developer’s Guide The OSE Session Model "As a database server, Oracle9i efficiently schedules work for thousands of users.
Overview A servlet context holds a Web application that is loaded into the OSE. The servlet context contains the servlets that make up the application, as well as other objects that the application needs. These might include JSPs, image files, sound files, static HTML pages, and other objects that make up the application. You should create at least one servlet context for each discrete application that the Web domain supports. A servlet context belongs to a specific Web domain. When you create a servlet context, you must specify the Web domain for the servlet context.
All servlets in the context have a published name, and the name is published in a single context (directory) in the JNDI namespace for the servlet context. So no two servlets in a servlet context can have the same name. A servlet context is owned by an Oracle server schema. A schema can "own" more than one servlet context, but a schema has a single namespace for class names. A servlet class can be published in different servlet contexts, with the same or different published names. Note: The servlet context maintains certain static information about the context.