Not able to create Container-Managed Bean

[pkrishnaswami]

I am trying to run the example in enterprise techtips (dec2002). THis involves a simple personBean along with 2 other beans -phoneBean and AddressBean. All three are entity beans and there is container managed relationship between them. I initially did not change the ejb-jar.xml which came with the example. I had create to jbosscmp-jdbc.xml and the contents are as below:

<jbosscmp-jdbc>


java:/dec2002
<datasource-mapping>Firebird</datasource-mapping>
<create-table>true</create-table>
<remove-table>true</remove-table>
<!-- <read-only>false</read-only>-->
<pk-constraint>true</pk-constraint>
<relation-mapping-style>foreign-key</relation-mapping-style>

<read-ahead>
on-load
<page-size>1000</page-size>
<eager-load-group>*</eager-load-group>
</read-ahead>
<list-cache-max>1000</list-cache-max>




<ejb-name>AddressBean</ejb-name>
<table-name>ADDRESSBEAN</table-name>
<cmp-field>
<field-name>postalcode</field-name>
<column-name>CODE</column-name>
</cmp-field>
<cmp-field>
<field-name>street2</field-name>
<column-name>STREET2</column-name>
</cmp-field>
<cmp-field>
<field-name>street1</field-name>
<column-name>STREET1</column-name>
</cmp-field>
<cmp-field>
<field-name>region</field-name>
<column-name>REGION</column-name>
</cmp-field>
<cmp-field>
<field-name>city</field-name>
<column-name>CITY</column-name>
</cmp-field>
<!-- <cmp-field>-->
<!-- <field-name>id</field-name>-->
<!-- <column-name>ID</column-name>-->
<!-- </cmp-field>-->





<ejb-name>PersonBean</ejb-name>
<table-name>PERSONBEAN</table-name>
<cmp-field>
<field-name>birthdate</field-name>
<column-name>BIRTHDATE</column-name>
</cmp-field>
<cmp-field>
<field-name>gender</field-name>
<column-name>GENDER</column-name>
</cmp-field>
<cmp-field>
<field-name>lastname</field-name>
<column-name>LASTNAME</column-name>
</cmp-field>
<cmp-field>
<field-name>middlename</field-name>
<column-name>MIDDLENAME</column-name>
</cmp-field>
<cmp-field>
<field-name>firstname</field-name>
<column-name>FIRSTNAME</column-name>
</cmp-field>
<cmp-field>
<field-name>id</field-name>
<column-name>ID</column-name>
</cmp-field>



<ejb-name>PhoneBean</ejb-name>
<table-name>PHONEBEAN</table-name>
<cmp-field>
<field-name>phonetype</field-name>
<column-name>PHONETYPE</column-name>
</cmp-field>
<cmp-field>
<field-name>areacode</field-name>
<column-name>AREACODE</column-name>
</cmp-field>
<cmp-field>
<field-name>number</field-name>
<column-name>NUMBER</column-name>
</cmp-field>
<cmp-field>
<field-name>extension</field-name>
<column-name>EXTENSION</column-name>
</cmp-field>
<!-- <cmp-field>-->
<!-- <field-name>id</field-name>-->
<!-- <column-name>ID</column-name>-->
<!-- </cmp-field>-->









<ejb-relation>
<ejb-relation-name>Person-Phone</ejb-relation-name>
<foreign-key-mapping />
<read-only>false</read-only>
<read-time-out>300</read-time-out>

<ejb-relationship-role>
<ejb-relationship-role-name>Person-has-phones</ejb-relationship-role-name>
<!-- <fk-constraint>true</fk-constraint>-->
<key-fields>
<key-field>
<field-name>id</field-name>
<column-name>phones</column-name>
</key-field>
</key-fields>
</ejb-relationship-role>


<ejb-relationship-role>
<ejb-relationship-role-name>Phone-belongs-to-Person</ejb-relationship-role-name>
<!-- <fk-constraint>true</fk-constraint>-->
<key-fields/>
</ejb-relationship-role>


</ejb-relation>

<ejb-relation>
<ejb-relation-name>Person-WorkAddress</ejb-relation-name>
<foreign-key-mapping />
<read-only>false</read-only>
<read-time-out>300</read-time-out>

<ejb-relationship-role>
<ejb-relationship-role-name>Person-has-workAddress</ejb-relationship-role-name>
<!-- <fk-constraint>true</fk-constraint>-->
<key-fields>
<key-field>
<field-name>id</field-name>
<column-name>workAddress</column-name>
</key-field>
</key-fields>
</ejb-relationship-role>


<ejb-relationship-role>
<ejb-relationship-role-name>workAddress-belongs-to-Person</ejb-relationship-role-name>
<!-- <fk-constraint>true</fk-constraint>-->
<key-fields/>
</ejb-relationship-role>


</ejb-relation>

<ejb-relation>
<ejb-relation-name>Person-HomeAddress</ejb-relation-name>
<foreign-key-mapping/>
<read-only>false</read-only>
<read-time-out>300</read-time-out>

<ejb-relationship-role>
<ejb-relationship-role-name>Person-has-homeAddress</ejb-relationship-role-name>
<!-- <fk-constraint>true</fk-constraint>-->
<key-fields>
<key-field>
<field-name>id</field-name>
<column-name>homeAddress</column-name>
</key-field>
</key-fields>
</ejb-relationship-role>


<ejb-relationship-role>
<ejb-relationship-role-name>homeAddress-belongs-to-Person</ejb-relationship-role-name>
<!-- <fk-constraint>true</fk-constraint>-->
<key-fields/>
</ejb-relationship-role>


</ejb-relation>




</jbosscmp-jdbc>


When I run the example, the PersonBean is created fine but creating the AddressBean returns a null reference.

I then modified the ejb-jar.xml so that both AddressBean and phoneBean has a primary key, modified the ejbs and jbosscmp-jdbc.xml accordingly. Now everything worked fine.

The example did not require that either PhoneBean or AddressBean have a seperate column ID as its primary key.

I have browsed the web and read that it is possible to create CMP beans without primary keys.

Is my jbsscmp-jdbc.xml wrong? Can somebody help me out?