Modify XML Deployment Descriptors

In addition to the configuration described in "Creating Entity Beans", you must modify and add the following to your ejb-jar.xml deployment descriptor:

1. Configure the persistence type to be "Bean" in the <persistence-type> element.

2. Configure a resource reference for the database persistence storage in the <resource-ref> element.

   The employee example used the database environment element of "jdbc/OracleDS". This is configured in the <resource-ref> element as follows:

   <resource-ref>
    <res-ref-name>jdbc/OracleDS</res-ref-name>
    <res-type>javax.sql.DataSource</res-type>
    <res-auth>Application</res-auth>
   </resource-ref>
   

The database specified in the <res-ref-name> element maps to a <ejb-location> element in the data-sources.xml file. Our "jdbc/OracleDS" database is configured in the data-sources.xml file, as shown below:

<data-source
  class="com.evermind.sql.DriverManagerDataSource"
  name="Oracle"
  location="jdbc/OracleCoreDS"
  pooled-location="jdbc/pool/OraclePoolDS"
  ejb-location="jdbc/OracleDS"
  xa-location="jdbc/xa/OracleXADS"
  connection-driver="oracle.jdbc.driver.OracleDriver"
  url="jdbc:oracle:thin:@myhost:1521:orcl"
  username="scott"
  password="tiger"
  max-connections="300"
  min-connections="5"
  max-connect-attempts="10"
  connection-retry-interval="1"
  inactivity-timeout="30"
  wait-timeout="30"
/>

Note: The entire BMP entity bean example is available on OTN from the OC4J sample code page at http://www.oracle.com/technology/tech/java/oc4j/demos/ on the OTN Web site.