what is J2EE store??

[Slide Tao]

hi,

I have used JDBC Store and File Store, but don't know what is J2EE store. I 
have read the J2EEStore how-too, and still  have no idea of J2EEStore. Who 
can tell what it is???

and if I want to use J2EEStore, do I need set web.xml and server.xml as 
following?? Any reply would be appreciated.

web.xml
<resource-ref>
   <description>Testing Tomcat-wide datasource usage</description>
   <res-ref-name>jdbc/mtx</res-ref-name>
   <res-type>javax.sql.DataSource</res-type>
   <res-auth>Container</res-auth>
</resource-ref>
server.xml
<DefaultContext debug="99">
   <Resource name="jdbc/mtx" auth="Container" type="javax.sql.DataSource"/>
   <ResourceParams name="jdbc/mtx">
       <parameter>
           <name>user</name>
           <value>bar</value>
       </parameter>
       <parameter>
           <name>password</name>
           <value>foo</value>
       </parameter>
       <parameter>
           <name>driverClassName</name>
           <value>org.hsqldb.jdbcDriver</value>
       </parameter>
       <parameter>
           <name>driverName</name>
           <value>jdbc:hsqldb:slide</value>
       </parameter>
   </ResourceParams>
</DefaultContext>
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