<datasource jta="true" jndi-name="java:/mydb" pool-name="my_pool"
enabled="true" use-java-context="true" use-ccm="true">
 <connection-url>jdbc:mysql://localhost:3306/calculette</connection-url>
 <driver>mysql</driver>
 <security>
 <user-name>root</user-name>
 <password>mdpadmin</password>
 </security>
 <statement>
 <prepared-statement-cache-size>100</prepared-statement-cache-size>
 <share-prepared-statements>true</share-prepared-statements>
 </statement>
</datasource>