13.2 Executable J2EE application formats

The applications that can be executed on J2EE servers are called J2EE applications. To execute the WAR format Web applications or the EJB-JAR format EJB applications on a J2EE server, you must deploy the applications as J2EE applications. The two types of J2EE applications that can be executed on J2EE servers are as follows:

Note that you can specify and import WAR files or WAR directories with a J2EE server. The imported application is called a WAR application, and can be deployed as a J2EE application. For details on the WAR applications, see 13.9 WAR applications.

The section 13.3 and subsequent sections describe the deployment of J2EE applications in each format. As the execution functionality of J2EE applications, the sections also describe the redeployment, update detection, and reloading of J2EE applications.

Note
In UNIX, if different values are specified for the LANG environment variable in the development and execution environments of the J2EE application, the java.text.ParseException:Unparseable date exception might be thrown when the J2EE server starts. However, the subsequent J2EE server operations are not affected.

For details on the functionality to be used during the operations of J2EE applications after the system operations are started, see 5. Operations of J2EE Applications in the uCosminexus Application Server Operation, Monitoring, and Linkage Guide.