What is the Advantage of using Servlets over CGI programming?
Servlets are only instantiated when the client first accesses the program. That is, the first time any client hits the URL that is used to access the Servlet, the Servlet engine instantiates that object. All subsequent accesses are done to that instance. This keeps the response time of Servlets lower than that of CGI programs, which must be run once per hit. Also, because a Servlet is instantiated only once, all accesses are put through that one object. This helps in maintaining objects like internal Connection Pooling or user session tracking and lots of other features. Here are a few more of the many applications for Servlets: 1. Allowing collaboration between people. A Servlet can handle multiple requests concurrently, and can synchronize requests. This allows Servlets to support systems such as on-line conferencing. 2. Forwarding requests. Servlets can forward requests to other servers and Servlets. Thus Servlets can be used to balance load among several servers that mirror the sam
