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I am trying to get Container Managed Relationships working with Oracle
Application Server. I am sure that the problem it quite obvious to
anyone who has got this working before, but after carefully following
numerous examples, I still can't get them to work. I have various
issues including the application server blocking when it calls the
getB() method in "A" to populate the items from table "B", even though
the generated SQL looks okay e.g., "select B_PK from B where (b_fk =
1)".
I would be extremely grateful if you could point out my (hopefully obvious) mistake as I wrestled with it for the past couple of weeks.
Any ideas?
Cheers,
Jonathan
I have two tables A and B; A has a one-to-many relationship with B:
Table A:
A_PK (primary key)
A_NAME
Table B:
B_PK (primary key) B_NAME B_FK (foreign key to table A)
My ejb-jar.xml file is:
<ejb-jar>
<enterprise-beans>
<entity>
<description>Entity Bean ( CMP )</description>
<display-name>A</display-name>
<ejb-name>A</ejb-name>
<home>mypackage1.AHome</home>
<remote>mypackage1.A</remote>
<local-home>mypackage1.ALocalHome</local-home>
<local>mypackage1.ALocal</local>
<ejb-class>mypackage1.impl.ABean</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.Long</prim-key-class>
<reentrant>False</reentrant>
<cmp-version>2.x</cmp-version>
<abstract-schema-name>A</abstract-schema-name>
<cmp-field><field-name>a_pk</field-name></cmp-field>
<cmp-field><field-name>a_name</field-name></cmp-field>
<primkey-field>a_pk</primkey-field>
</entity>
<entity>
<description>Entity Bean ( CMP )</description>
<display-name>B</display-name>
<ejb-name>B</ejb-name>
<home>mypackage1.BHome</home>
<remote>mypackage1.B</remote>
<local-home>mypackage1.BLocalHome</local-home>
<local>mypackage1.BLocal</local>
<ejb-class>mypackage1.impl.BBean</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.Long</prim-key-class>
<reentrant>False</reentrant>
<cmp-version>2.x</cmp-version>
<abstract-schema-name>B</abstract-schema-name>
<cmp-field><field-name>b_pk</field-name></cmp-field>
<cmp-field><field-name>b_name</field-name></cmp-field>
<cmp-field><field-name>b_fk</field-name></cmp-field>
<primkey-field>b_pk</primkey-field>
</entity>
</enterprise-beans>
<relationships>
<ejb-relation>
<ejb-relation-name>A-B</ejb-relation-name>
<ejb-relationship-role>
<multiplicity>One</multiplicity>
<cascade-delete/>
<relationship-role-source>
<ejb-name>A</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>b</cmr-field-name>
<cmr-field-type>java.util.Collection</cmr-field-type>
</cmr-field>
</ejb-relationship-role>
<ejb-relationship-role>
<multiplicity>Many</multiplicity>
<relationship-role-source>
<ejb-name>B</ejb-name>
</relationship-role-source>
</ejb-relationship-role>
</ejb-relation>
</relationships>
</ejb-jar>
And my orion-ejb-jar.xml file is:
<?xml version = '1.0' encoding = 'windows-1252'?>
<!DOCTYPE orion-ejb-jar PUBLIC "-//Evermind//DTD Enterprise JavaBeans
1.1 runtime//EN" " "
target="_new">http://xmlns.oracle.com/ias/dtds/orion-ejb-jar.dtd">
<orion-ejb-jar>
<enterprise-beans>
<entity-deployment name="A" copy-by-value="false"
data-source="jdbc/Connection1DS" exclusive-write-access="false"
table="a">
<primkey-mapping>
<cmp-field-mapping name="a_pk" persistence-name="a_pk"
persistence-type="int(11)"/>
</primkey-mapping>
<cmp-field-mapping name="a_pk" persistence-name="a_pk"
persistence-type="int(11)"/>
<cmp-field-mapping name="a_name" persistence-name="a_name"
persistence-type="varchar(100)"/>
<cmp-field-mapping name="b">
<collection-mapping table="B">
<primkey-mapping>
<cmp-field-mapping name="b_fk" persistence-name="B_FK"/>
</primkey-mapping>
<value-mapping type="mypackage1.BLocal">
<cmp-field-mapping>
<entity-ref home="B">
<cmp-field-mapping name="b_pk" persistence-name="B_PK"/>
</entity-ref>
</cmp-field-mapping>
</value-mapping>
</collection-mapping>
</cmp-field-mapping>
</entity-deployment>
<entity-deployment name="B" copy-by-value="false"
data-source="jdbc/Connection1DS" exclusive-write-access="false"
table="b">
<primkey-mapping>
<cmp-field-mapping name="b_pk" persistence-name="b_pk"
persistence-type="int(11)"/>
</primkey-mapping>
<cmp-field-mapping name="b_pk"
persistence-name="b_pk" persistence-type="int(11)"/>
<cmp-field-mapping name="b_fk" persistence-name="b_fk"
persistence-type="int(11)"/>
</entity-deployment>
</enterprise-beans>
<assembly-descriptor>
<default-method-access>
<security-role-mapping impliesAll="true"
name="<default-ejb-caller-role>"/>
</default-method-access>
</assembly-descriptor>
</orion-ejb-jar>
Received on Tue Dec 10 2002 - 08:25:30 CST