The ServletExec product line consists of five deployment versions - depending on your web server, operating system, and process configuration. All versions of the ServletExec product line share a common set of features.
Shipping since December 1997, ServletExec is one of the most mature, robust, and best performing implementations of the servlet and JSP specifications available. ServletExec has historically been one of the first products to implement new versions of the servlet and JSP specifications.
Debugging in ServletExec can be accomplished from within the web server included within the Windows and UNIX versions of ServletExes/AS (above). The ServletExec/AS built-in web server is a basic web server written in Java that contains the full ServletExec implementation of servlets and JSP.
The built-in web server lets you develop and debug web applications in an environment that very closely simulates the ServletExec deployment environment. It facilitates the development and debugging of web applications by allowing you to run them from within an IDE.