INTERACTIVE WEB SERVICES WITH JAVA

Servlet Contexts

Each Web application has a ServletContext object (returned by getServletContext()):

allows data to be shared between interactions and different servlets
contains a server log
access to global server configuration
other Web application's servlet contexts are accessible (can be restricted)

Shared state:

void setAttribute(String name, Object object)
Object getAttribute(String name)

Any object can be stored - and freely modified.

(For some reason, servlet class fields are rarely used to share data!?)

Alternatives to ServletContext:

JDBC - API for connecting to SQL databases
JDOM / JAXP - APIs for manipulating XML documents (see the XML Tutorial!)

COPYRIGHT © 2002-2003 ANDERS MØLLER & MICHAEL I. SCHWARTZBACH