1.6.1
Simple 2
1/2
 Tier Application
HTTP/HTML/XML
Java method invocation (JDBC)
Browser
JSP
The simple 2 tier model (accessing a database in the example above) describes the cgi bin 
replacement architecture that the Servlet model first enabled. This allows a JSP (or a Servlet) 
to directly access some external resource (such as a database or legacy application) to service 
a client's request. The advantage of such a scheme is that it is simple to program, and allows 
the page author to easily generate dynamic content based upon the request and state of the 
resource(s). However this architecture does not scale for a large number of simultaneous 
clients since each must establish/or share (ad hoc) a (potentially scarce/expensive) 
connection to the resource(s) in question.
1.6.2
N tier Application
HTTP/HTML/XML
RMI/IIOP
Browser
JSP
EJB
29
JavaServer Pages 1.1 Specification   November 30, 1999




JSP Web Hosting JavaServer Pages Specifications JSP Hosting




 
TotalRoute.net Business web hosting division of Vision Web Hosting Inc. All rights reserved.