C M P   2 . 0  

org.jboss.docs.cmp2.crimeportal.Gangster

         org.jboss.docs.cmp2.crimeportal.GangsterBean 

         Container 

         java.lang.Integer 

         False  

2.x

gangster

         gangsterId 

         name 

         nickName 

         gangsterId 

Listing 9 4, The ejb jar.xml Entity Declaration 

The most important part of the ejb jar.xml file is the DOCTYPE declaration. When JBoss 

deploys an EJB jar file, the DOCTYPE of the ejb jar.xml deployment descriptor is used to 

determine the version of the EJB jar. If the public identifier of the DOCTYPE is " //Sun 

Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN", JBoss will use the JBossCMP 

persistence engine, otherwise the old JAWS CMP 1.1 persistence engine will be used. The 

new local home and local elements are equivalent to the home and remote elements. The 

cmp version element is new and can be either 1.x or the default 2.x. This element was added 

so 1.x and 2.x entities could be mixed in the same application. The abstract schema name 

element is also new and is used to identify this entity type in EJB QL queries. 

Entity Mapping 

The optional JBossCMP configuration is declared in the jbosscmp jdbc.xml file, which is 

located in the META INF directory of the ejb jar file. This file has the same overall structure 

as the ejb jar.xml file, except the root element is jbosscmp jdbc instead of ejb jar. The 

optional configuration of the GangsterEJB follows: