Three-Tier Architecture

From DOC

Note: This page describes a new feature of Tolven that is under development.

The three tier architecture contains a web server. The Web Server contains no database access capability. This tier is responsible for serving static content. It also constructs dynamic web pages using services provided by Tolven Application server. The most convenient way to expose these services is via RESTful services. The Tolven application server contains a RESTful API that wraps EJB session beans which carry out most of the heavy lifting and in turn depends on the database and LDAP server for persistent storage and access.

There are two servlets describes in this picture. The one(s) on the Web Application (presentation) tier typically provide HTML content. The servlets on the Tolven application (middleware) tier, are strictly for the RESTful services, which are based on HTTP, but not HTML.