Apache Tomcat makes an environment available to the execution of Java code on Web servers, which is developed in the context of the Jakarta project of the Apache software Foundation. This concerns a Servlet container written in Java, which can translate and implement assistance of the JSP compiler Jasper also JavaServer Pages into Servlets. In addition a complete HTTP server comes.

The HTTP server of the Tomcat is used particularly for development, while into production mostly a Apache Web server is used. In addition in Apache a Plugin is merged, which passes on only Requests for dynamic contents at Tomcat. The Plugin then normally addresses Tomcat via the Apache JServ Protocol.

Level of development

The first Tomcat version was version 3.0. Tomcat 5.5.x is the newest version from the year 2005. It implements the specifications Servlet 2,4 and JSP 2.0. Since version 4.x Tomcat uses the Catalina Servlet container.

Listing structure

The listing hierarchy of a Tomcatinstallation covers:

• are - startup, shutdown and other Skripte and executable files
• common - general classes, which can be used by Catalina and other Web applications
• conf - XML files and in addition due DTDs of the Tomcat configuration
• logs - Catalina and application Logs
• server - classes, which are used only by Catalina
• shared - classes, which are used by all Web applications
• webapps - listing of the Web applications
• work - temporary keeping of files and listings

Product properties

Tomcat 3.x

• the Servlet 2,2 and the JSP 1,1 specification follow
• again loading of Servlets, without restart

Tomcat 4.x

• the Servlet 2,3 and the JSP 1,2 specification follow
• the Servlet container was developed again and calls themselves Catalina now
• the JSP compiler was developed again and calls themselves Jasper now
• Java management Extensions (JMX), JSP and Struts was based administration

Tomcat 5.0.x

• the Servlet 2,4 and the JSP 2,0 specification follow
• improves integration into the platforms Windows and Unix

Tomcat 5.5.x

• the Servlet 2,4 and the JSP 2,0 specification follow
• needed normally J2SE 5,0, however version 1.4 can run with something configuration also under Java 2
• increased performance and stability
• many parts were revised

History

James Duncan Davidson, at that time with Sun Microsystems as developers busily, began to develop Tomcat as an implementation of the Servletspezifikationen. It helped to make thereby, from Tomcat an open SOURCE project and to hand it over to the Apache software Foundation.

Related links

• Tomcat homepage

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