Java Web Services: Up and Running, 2nd Edition

TomEE: Tomcat with Java EE Extensions

Apache TomEE can be downloaded in various ways, including as a standalone Java EE application server or as a bundled WAR file that can be published with Tomcat7. TomEE adds the OpenEJB container to Tomcat7 but also includes, for example, the Apache CXF implementation of the JAX-RS API and a JMS provider. TomEE, like Tomcat, can be installed anywhere on the filesystem, and the TomEE directory structure is almost identical to that of Tomcat7. TomEE is designed with simplicity in mind. The Java world is awash with options and, with respect to JASes, TomEE is one worth considering.

Managing the TomEE Web Server and EJB Container

In a TomEE installation, the web server can be started and stopped independently of the EJB components, which includes the EJB container. A typical startup scenario would be:

• In TomEE_HOME/bin, run the startup script:

  % shartup.sh  ;; startup.bat under Windows

• In the same directory, run the startup script for the EE components:

  % tomee.sh start

The TomEE web server would be stopped in the usual way:

% shutdown.sh ;; shutdown.bat under Windows

The TomEE EE components are stopped with this command:

% tomee.sh stop

The TomEE web server furnishes the usual Tomcat7 web console (localhost:8080), which also includes a TomEE web console (localhost:8080/tomee) for the distinctly EE components.

Porting the predictionsEJB Web Service to TomEE

The two .java files in the predictionsEJB service, Prediction.java (see Example 7-6) and PredictionEJB.java ...