Talk:Three-tier (computing)

Does the Theory Work?

In a three tier model, how easily can a web application can be converted to different types of applications?

For example:

Using Jakarta Tomcat <-> Jave 2 Enterprise Edition <-> Mysql

then change it to Apache 2 Web Server <-> PHP <-> Postgre

What type of web application would it be? Well, let's say it is a movie rental web application.

~AT3

Changing the business logic is a pain in the .... Changing PHP for Java Servlets & JSP is very difficult, as the programming is quite diferent. Also, as far as I understand PHP combines both presentation and logic on the same page, whereas a Level 2 JSP implementation implements business logic on servlets and presentation on JSP.

Now regarding the first architecture, it is actually Apache Web Server -> Jakarta Tomcat (Java 2 Enterprise Edition) -> MySQL. The second one is ok. For either of the two, changing for example Apache Web server with MS IIS 4.0 is doable. I have installed IIS with Jakarta. It is also fairly straightfoward to change the database AS LONG AS you use standard ANSI SQL queries.

So basically the theory holds... as long as you don't change the most important part, the business logic. --Threner 03:29, 29 October 2005 (UTC)[reply]

Cleanup and merging

For more information on this (and my crazy plans/screw ups) see Talk:Multitier architecture#Cleanup and merging. -- Foofy 07:13, 19 October 2005 (UTC)[reply]