Application Servers

Java EE

• Web modules are servlets and JavaServer Pages (JSP)
• Business logic is built into Enterprise JavaBeans (EJB)

• Java EE provides standards for containing the web components
• Tomcat and Jetty are examples of containers to put the modules into

JBoss

• Uses Tomcat or Jetty as a JSP / servlet container
• Licensed under the LGPL
• Red Hat (acquired JBoss, Inc.)
  

• Java EE version supported

• JBoss 4.0 (J2EE 1.4)

WebSphere

• Community Edition (based on Geronimo): free
• IBM
  

• Java EE version supported

• WebSphere 5 (J2EE 1.3)
• WebSphere 6 (J2EE 1.4)

JSAS

• Java System Application Server
• Platform Edition (GlassFish): free
  
• Standard Edition, Enterprise Edition: non-free
• Sun
  

GlassFish

• Uses Tomcat as a JSP / servlet container
• Licensed under the Community Development and Distribution License (CDDL) (FSF-approved; GPL-incompatible)

Geronimo

• Java EE application server
• Uses Tomcat or Jetty as a JSP / servlet container
• Uses OpenEJB as an EJB container
• Uses Apache Axis for SOAP
• Uses jUDDI for UDDI
  
• Optionally uses Apache Derby (Java-based RDBMS with native JDBC support)
• Part of the Apache Software Foundation
• Licensed under the Apache License v2.0 (FSF-approved; GPL-incompatible)

• Java SE version supported

• Geronimo 1.0 (J2SE 1.4) [1.4.2_08 or a later 1.4.2 version; IBM Java 1.4.2 SR3 or a later SR; J2SE 5 (1.5) not supported]
  

• Java EE version supported

• Geronimo 1.0 (J2EE 1.4)