Summary

In this chapter we identified the architecture of J2EE applications including client tier, web tier, business tier , and Enterprise Information Systems (EIS), which usually exists as a database. You learned about the components available within J2EE applications and the purpose of each. Specifically, we discussed client applications, web applications, and EJBs. Then you saw how they exist within JAR, WAR, and EAR files. Next, you learned about the configuration options available for each of these file types. Finally, we covered how to deploy an application to a standalone OC4J container, what actually occurs during deployment, and how to force a redeployment.