NonStop Servlets for JavaServer Pages (5.0) System Administrator's Guide

Migrating to NSJSP 5.0
NonStop Servlets for JavaServer Pages (NSJSP) System Administrator’s Guide—525644-002
7-11
Changes from Servlet 2.3 to Servlet 2.4
•
In the Deployment Descriptor web.xml, all sub-elements under the <web-app>
element can be in any order.
In the schema for the deployment descriptor web.xml, the <url-pattern>
element under the <web-app>/<security-constraint>/<web-resource-
collection> element tree is mandatory and must always be specified.
•
Allows multiple constraints on pattern and method (specified using <url-
pattern> and <http-method> elements in the deployment descriptor
web.xml).
Multiple constraints on pattern and method (specified with <url-pattern> and
<http-method> elements in the deployment descriptor web.xml are now
supported and the constraints applied to the web application is the resultant set
defined by combining the individual constraints.
•
The container throws HTTP Error 500 (Internal Service Error) for the entire web
application for any unhandled exceptions in the Application Listener code.
•
The deployment descriptor web.xml defines Servlets using the <welcome-file>
element under the <web-app>/<welcome-file-list> element tree.
•
Clarifications for always alive sessions (sessions that never time out).
In the schema for the deployment descriptor web.xml the <session-timeout>
element under the <web-app>/<session-config> element tree supports
sessions that never time out (that is , sessions can have zero or negative values).
•
The container now returns SC_NOT_FOUND (404) codes on direct access to
/WEB-INF/ and /META-INF/ resources.
See the Java Servlet 2.4 API documentation for more information
http://java.sun.com/products/servlet/.