Expresso Framework is an open standards-based J2EE
architectural framework that allows the developer
to concentrate on application logic. It is a
library of extensible Java Server application
framework components for creating database-driven
Web applications based on open standards. Expresso
integrates with Apache Jakarta Struts, which
emphasizes presentation and application
configuration, and bringing a powerful tag library
to Expresso. Expresso adds capabilities for
security, robust object-relational mapping,
background job handling and scheduling,
self-tests, logging integration, automated table
manipulation, database connection pooling, email
connectivity, event notification, error handling,
caching, internationalization, XML automation,
testing, registration objects, configuration
management, workflow, automatic database
maintenance, and a JSP tag library.