JAR Configuration
You can configure EJB JARs by using the ejb-jar.xml and ejb-j2ee-engine.xml deployment descriptors.
Configuration consists of providing the information required for deployment. The ejb-jar.xmlis the J2EE-specified deployment descriptor. The deployment descriptors ejb-j2ee-engine.xml and persistent.xml contain additional entries specific to the J2EE engine. The DTDs for these descriptors are ejb-j2ee-engine.dtd and persistent.dtd respectively.
Configuration is extensively covered under Developing Enterprise Beans.
Process Flow
Both ejb-jar.xmland ejb-j2ee-engine.xml are automatically generated when you create an EJB project. For more information, see Creating EJB Projects.
You can further edit the deployment descriptors using the multipage editor. See: