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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
Apache, Jakarta, Tomcat, Catalina, Coyote, Jasper

Posted by enquirer (enquirer), 8 September 2003
I want to use my Java classes as Servlets on my web site; I know the above are something to do with it, but I'm confused about all the buzzwords. Can you explain?

Posted by admin (Graham Ellis), 8 September 2003
* Apache is "The Apache Software Foundation" - an umbrella organisation that looks after a number of Open Source projects.

*Jakarta is the group name for the Java based projects of the Apache Software foundation

* Tomcat is a Web Server that handles server side Java (in the form of Servlets and JSPs), and it's a part of the Apache Jakarta project group. Tomcat is the "reference" implementation of the Servlet and JSP standards - in other words, if it runs under Tomcat, it should run under any compliant Servlet / JSP container

* Catalina is the Java Engine (JRE / JVM) that's built into Tomcat and provides an environment in which Servlets can be run

* Coyote is the HTTP connector that's built into Tomcat and provides Tomcat with an interface that browsers can connect to.

* Jasper is the Java Server pages handler in Tomcat; internally, it deals with any compiling that's neccessary, and converts JSPs into Servlets for Catalina to handle.

There are sections in our training manuals which cover how all the various parts of a web server go together, and the various parts of Tomcat and the names of the elements.  Links:
=> Java Applications - Deployment on the Web
=> Tomcat Overview





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