Catalina (Tomcat)

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In computing, Catalina is the name of the servlet container of Apache Tomcat since version 4.x. It is developed at the Apache Software Foundation. Tomcat implements Sun Microsystems' specifications for servlet and JavaServer Pages (JSP), which are important Java-based Web technologies.

Tomcat's servlet container was redesigned as Catalina in Tomcat version 4.x. The architect for Catalina was Craig McClanahan.

Other components of the Tomcat engine are:

Tomcat Jasper which converts the code portions within JavaServer Pages into servlets and pass them to Catalina to process.
Tomcat Coyote which is an HTTP connector based on HTTP/1.1 specifications that receives and transmits web requests to the Tomcat engine by listening to a TCP/IP port and returns requests back to the requesting client.