CMR problem

Hi friends
I am using weblogic,ejb ,XDoclet...Doing one CMR relation program
I have tow tables
1.Order_detail
2.Order_header
In order_detail table i have PK serial number and FK po_no
In order_header table i have PK po_no
It is like order has many items program
Im CMR relation i gave
bold/**
     * 
     * CMR Field items
     * Returns the items
     * @return the items
     * 
     * 
     * @ejb.interface-method
     * view-type="local"
     * @ejb.relation
     * name="order_header"
     * role-name="Order-contains-Items"
     * target-ejb="OrderDetail"
     * target-role-name="item-contained-in-order"
     * target-cascade-delete="yes"
     * @weblogic.target-column-map
     * foreign-key-column="po_no"
     * key-column="po_no"
     * 
     * @generated
public abstract java.util.Collection getItems();
* 
* Sets the Items
* @param java.util.Collection the new items value
* 
* 
* @ejb.interface-method
*           view-type="local"
* 
* @generated
public abstract void setItems(java.util.Collection items);*bold*
I am getting the error of
When a cmp-field and a cmr-field (relationship) are mapped to the same column, the setXXX method for the cmp-field may not be called. The cmp-field is read-only.
Please help me to sort out this.
thanks in advance

i had this same problem of recent. i never included the cmp(setter and getter of fk). i worked with the cmr
setter and getter. it worked but do not know if this was a standard.
Sumelong

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I copied and pasted your code as well as made c08 and c09 directories. I had no errors compiling. I am using NT, but it appears that your problem is Classpath related. You can try to CD to the C:\Java directory and compile using "javac c09\Test.java" That's the command I used.

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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" "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>

Ok, I found out something strange. If I do the addPet operation twice in the client the new relationship is created, too.
p = home.create("Violetta");
p.addNewPet("Jenny");
p = home.create("Frank");
p.addPet("Jenny");
p.addPet("Jenny");
May this be a timing problem? Or is there a command I could execute to ensure all data manipulation is populated to the DB. (Like close() in JDBC)
TIA
Frank

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I have to create Category EJB in my project. Which is recursive object because it may be root category or branch category.
In my Bean Class, I declared:
// CMP Fields
//CMR Fields
public abstract Collection getSubCategories();
public abstract void setSubCategories(Collection categories);
And in deployment descriptor, I declare recursive relationship for this bean:
<ejb-relation>
<ejb-relation-name>Category-Category</ejb-relation-name>
<ejb-relationship-role>
<ejb-relationship-role-name>Category</ejb-relationship-role-name>
<multiplicity>One</multiplicity>
<relationship-role-source>
<ejb-name>Category</ejb-name>
</relationship-role-source>
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Hi,
I have been trying to solve the very same problem for some time, could you let me know the answer to this. If you are feeling extremely generous, could you post/email the source code for the category EJB to me.
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Anthony Miller
[email protected]

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[import java.util.Collection;]
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Hello,
I have two ejbs, one called EstablishmentEJB and another called VisitorCommentsEJB. The relationship is of one EstablishmentEJB instance to many VisitorCommentsEJB instances.
Here are the definitions for the tables:
CREATE TABLE establishments (
DB_ESTABLISHMENT_ID int(11) NOT NULL default '0',
DB_POSTCODE varchar(100) NOT NULL default '',
DB_ESTABLISHMENT_NAME varchar(255) NOT NULL default '',
PRIMARY KEY (DB_ESTABLISHMENT_ID)
) TYPE=InnoDB;
CREATE TABLE visitors_comments (
DB_VISITOR_COMMENT_ID int(11) NOT NULL auto_increment,
DB_ESTABLISHMENT_ID int(11) NOT NULL default '0',
DB_COMMENT varchar(255) NOT NULL default '',
PRIMARY KEY (DB_VISITOR_COMMENT_ID)
) TYPE=InnoDB;Here are the xml DDs:
<?xml version="1.0" encoding="ISO-8859-1"?>

<ejb-jar xmlns="http://java.sun.com/xml/ns/j2ee"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
           http://java.sun.com/xml/ns/j2ee/ejb-jar_2_1.xsd"
           version="2.1">
     <description>test guide</description>
     <display-name>test guide</display-name>
     <enterprise-beans>
          
          <entity>
               <ejb-name>EstablishmentEJB</ejb-name>
               <home>com.softwareag.test_guide.establishmentEJB.PGEstablishmentHome</home>
               <remote>com.softwareag.test_guide.establishmentEJB.PGEstablishment</remote>
               <local-home>com.softwareag.test_guide.establishmentEJB.PGEstablishmentLocalHome</local-home>
               <local>com.softwareag.test_guide.establishmentEJB.PGEstablishmentLocal</local>
               <ejb-class>com.softwareag.test_guide.establishmentEJB.PGEstablishmentBean</ejb-class>
               <persistence-type>Container</persistence-type>
               <prim-key-class>java.lang.Integer</prim-key-class>
               <reentrant>false</reentrant>
               <cmp-version>2.x</cmp-version>
               <abstract-schema-name>Establishment</abstract-schema-name>
               <cmp-field>
                    <field-name>id</field-name>
               </cmp-field>
               <cmp-field>
                    <field-name>name</field-name>
               </cmp-field>
               <primkey-field>id</primkey-field>
          </entity>
          
          <entity>
               <ejb-name>GradeEJB</ejb-name>
               <home>com.softwareag.test_guide.gradeEJB.PGGradeHome</home>
               <remote>com.softwareag.test_guide.gradeEJB.PGGrade</remote>
               <local-home>com.softwareag.test_guide.gradeEJB.PGGradeLocalHome</local-home>
               <local>com.softwareag.test_guide.gradeEJB.PGGradeLocal</local>
               <ejb-class>com.softwareag.test_guide.gradeEJB.PGGradeBean</ejb-class>
               <persistence-type>Container</persistence-type>
               <prim-key-class>java.lang.Integer</prim-key-class>
               <reentrant>false</reentrant>
               <cmp-version>2.x</cmp-version>
               <abstract-schema-name>Grade</abstract-schema-name>
               <cmp-field>
                    <field-name>id</field-name>
               </cmp-field>
               <cmp-field>
                    <field-name>grade</field-name>
               </cmp-field>
               <primkey-field>id</primkey-field>
          </entity>
          
          <entity>
               <ejb-name>VisitorCommentEJB</ejb-name>
               <home>com.softwareag.test_guide.visitorCommentEJB.PGVisitorCommentHome</home>
               <remote>com.softwareag.test_guide.visitorCommentEJB.PGVisitorComment</remote>
               <local-home>com.softwareag.test_guide.visitorCommentEJB.PGVisitorCommentLocalHome</local-home>
               <local>com.softwareag.test_guide.visitorCommentEJB.PGVisitorCommentLocal</local>
               <ejb-class>com.softwareag.test_guide.visitorCommentEJB.PGVisitorCommentBean</ejb-class>
               <persistence-type>Container</persistence-type>
               <prim-key-class>java.lang.Integer</prim-key-class>
               <reentrant>false</reentrant>
               <cmp-version>2.x</cmp-version>
               <abstract-schema-name>VisitorsComment</abstract-schema-name>
               <cmp-field>
                    <field-name>id</field-name>
               </cmp-field>
               <cmp-field>
                    <field-name>comment</field-name>
               </cmp-field>
               <primkey-field>id</primkey-field>
          </entity>
          
          <entity>
               <ejb-name>CountryEJB</ejb-name>
               <home>com.softwareag.test_guide.countryEJB.PGCountryHome</home>
               <remote>com.softwareag.test_guide.countryEJB.PGCountry</remote>
               <local-home>com.softwareag.test_guide.countryEJB.PGCountryLocalHome</local-home>
               <local>com.softwareag.test_guide.countryEJB.PGCountryLocal</local>
               <ejb-class>com.softwareag.test_guide.countryEJB.PGCountryBean</ejb-class>
               <persistence-type>Container</persistence-type>
               <prim-key-class>java.lang.Integer</prim-key-class>
               <reentrant>false</reentrant>
               <cmp-version>2.x</cmp-version>
               <abstract-schema-name>Country</abstract-schema-name>
               <cmp-field>
                    <field-name>id</field-name>
               </cmp-field>
               <cmp-field>
                    <field-name>countryName</field-name>
               </cmp-field>
               <primkey-field>id</primkey-field>
          </entity>
          
          <entity>
               <ejb-name>CategoryEJB</ejb-name>
               <home>com.softwareag.test_guide.categoryEJB.PGCategoryHome</home>
               <remote>com.softwareag.test_guide.categoryEJB.PGCategory</remote>
               <local-home>com.softwareag.test_guide.categoryEJB.PGCategoryLocalHome</local-home>
               <local>com.softwareag.test_guide.categoryEJB.PGCategoryLocal</local>
               <ejb-class>com.softwareag.test_guide.categoryEJB.PGCategoryBean</ejb-class>
               <persistence-type>Container</persistence-type>
               <prim-key-class>java.lang.Integer</prim-key-class>
               <reentrant>false</reentrant>
               <cmp-version>2.x</cmp-version>
               <abstract-schema-name>Category</abstract-schema-name>
               <cmp-field>
                    <field-name>id</field-name>
               </cmp-field>
               <cmp-field>
                    <field-name>category</field-name>
               </cmp-field>
               <primkey-field>id</primkey-field>
          </entity>
          
          <session>
               <ejb-name>PGSearchEngineValueListHandlerEJB</ejb-name>
               <home>com.softwareag.test_guide.searchEngineEJB.PGSearchEngineValueListHandlerHome</home>
               <remote>com.softwareag.test_guide.searchEngineEJB.PGSearchEngineValueListHandler</remote>
               <local-home>com.softwareag.test_guide.searchEngineEJB.PGSearchEngineValueListHandlerLocalHome</local-home>
               <local>com.softwareag.test_guide.searchEngineEJB.PGSearchEngineValueListHandlerLocal</local>
               <ejb-class>com.softwareag.test_guide.searchEngineEJB.PGSearchEngineValueListHandlerBean</ejb-class>
               <session-type>Stateful</session-type>
               <transaction-type>Container</transaction-type>
                <resource-ref>
               <res-ref-name>jdbc/test_guia</res-ref-name>
               <res-type>javax.sql.DataSource</res-type>
               <res-auth>Application</res-auth>
               </resource-ref>
          </session>
          
          <session>
               <ejb-name>PGSessionFacadeEJB</ejb-name>
               <home>com.softwareag.test_guide.sessionFacadeEJB.PGSessionFacadeHome</home>
               <remote>com.softwareag.test_guide.sessionFacadeEJB.PGSessionFacade</remote>
               <local-home>com.softwareag.test_guide.sessionFacadeEJB.PGSessionFacadeLocalHome</local-home>
               <local>com.softwareag.test_guide.sessionFacadeEJB.PGSessionFacadeLocal</local>
               <ejb-class>com.softwareag.test_guide.sessionFacadeEJB.PGSessionFacadeBean</ejb-class>
               <session-type>Stateless</session-type>
               <transaction-type>Container</transaction-type>
               <resource-ref>
               <res-ref-name>jdbc/test_guia</res-ref-name>
               <res-type>javax.sql.DataSource</res-type>
               <res-auth>Application</res-auth>
               </resource-ref>
          </session>
     </enterprise-beans>
     <relationships>
          
          <ejb-relation>
               <ejb-relation-name>Establishment-VisitorComment</ejb-relation-name>
               <ejb-relationship-role>
                    <ejb-relationship-role-name>Establishment-has-many-comments</ejb-relationship-role-name>
                    <multiplicity>One</multiplicity>
                    <relationship-role-source>
                         <ejb-name>EstablishmentEJB</ejb-name>
                    </relationship-role-source>
                    <cmr-field>
                         <cmr-field-name>visitorComments</cmr-field-name>
                         <cmr-field-type>java.util.Collection</cmr-field-type>
                    </cmr-field>
               </ejb-relationship-role>
               <ejb-relationship-role>
                    <ejb-relationship-role-name>Comment-belongs-to-Establishment</ejb-relationship-role-name>
                    <multiplicity>Many</multiplicity>
                    <relationship-role-source>
                         <ejb-name>VisitorCommentEJB</ejb-name>
                    </relationship-role-source>
               </ejb-relationship-role>
          </ejb-relation>
          
          <ejb-relation>
               <ejb-relation-name>Establishment-Grade</ejb-relation-name>
               <ejb-relationship-role>
                    <ejb-relationship-role-name>Establishment-has-many-grades</ejb-relationship-role-name>
                    <multiplicity>One</multiplicity>
                    <relationship-role-source>
                         <ejb-name>EstablishmentEJB</ejb-name>
                    </relationship-role-source>
                    <cmr-field>
                         <cmr-field-name>grades</cmr-field-name>
                         <cmr-field-type>java.util.Collection</cmr-field-type>
                    </cmr-field>
               </ejb-relationship-role>
               <ejb-relationship-role>
                    <ejb-relationship-role-name>Grade-belongs-to-Establishment</ejb-relationship-role-name>
                    <multiplicity>Many</multiplicity>
                    <relationship-role-source>
                         <ejb-name>GradeEJB</ejb-name>
                    </relationship-role-source>
               </ejb-relationship-role>
          </ejb-relation>
          
          <ejb-relation>
               <ejb-relation-name>Country-Establishment</ejb-relation-name>
               <ejb-relationship-role>
                    <ejb-relationship-role-name>Country-has-many-establishments</ejb-relationship-role-name>
                    
                    <multiplicity>Many</multiplicity>
                    <relationship-role-source>
                         <ejb-name>CountryEJB</ejb-name>
                    </relationship-role-source>
               </ejb-relationship-role>
               <ejb-relationship-role>
                    <ejb-relationship-role-name>Establishment-has-many-countries</ejb-relationship-role-name>
                    <multiplicity>Many</multiplicity>
                    <relationship-role-source>
                         <ejb-name>EstablishmentEJB</ejb-name>
                    </relationship-role-source>
                    <cmr-field>
                         <cmr-field-name>countries</cmr-field-name>
                         <cmr-field-type>java.util.Collection</cmr-field-type>
                    </cmr-field>
               </ejb-relationship-role>
          </ejb-relation>
          
          <ejb-relation>
               <ejb-relation-name>Establishment-Category</ejb-relation-name>
               <ejb-relationship-role>
                    <ejb-relationship-role-name>Establishment-has-many-categories</ejb-relationship-role-name>
                    <multiplicity>Many</multiplicity>
                    <relationship-role-source>
                         <ejb-name>EstablishmentEJB</ejb-name>
                    </relationship-role-source>
                    <cmr-field>
                         <cmr-field-name>categories</cmr-field-name>
                         <cmr-field-type>java.util.Collection</cmr-field-type>
                    </cmr-field>
               </ejb-relationship-role>
               <ejb-relationship-role>
                    <ejb-relationship-role-name>Category-has-many-establishments</ejb-relationship-role-name>
                    <multiplicity>Many</multiplicity>
                    <relationship-role-source>
                         <ejb-name>CategoryEJB</ejb-name>
                    </relationship-role-source>
               </ejb-relationship-role>
          </ejb-relation>
     </relationships>
</ejb-jar>
<?xml version="1.0" encoding="ISO-8859-1"?>
<jonas-ejb-jar xmlns="http://www.objectweb.org/jonas/ns"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="http://www.objectweb.org/jonas/ns
            http://www.objectweb.org/jonas/ns/jonas-ejb-jar_4_0.xsd" >


<jonas-session>
    <ejb-name>PGSearchEngineValueListHandlerEJB</ejb-name>
    <jndi-name>PGSearchEngineValueListHandlerEJBHome</jndi-name>
    <jonas-resource>
      <res-ref-name>jdbc/test_guia</res-ref-name>
      <jndi-name>test_guia</jndi-name>
    </jonas-resource>
</jonas-session>

<jonas-session>
    <ejb-name>PGSessionFacadeEJB</ejb-name>
    <jndi-name>PGSessionFacadeEJBHome</jndi-name>
     <jonas-resource>
      <res-ref-name>jdbc/test_guia</res-ref-name>
      <jndi-name>test_guia</jndi-name>
    </jonas-resource>
</jonas-session>

<jonas-entity>
    <ejb-name>EstablishmentEJB</ejb-name>
    <jndi-name>PGEstablishmentHome</jndi-name>
         <cleanup>none</cleanup>
     <jdbc-mapping>
      <jndi-name>test_guia</jndi-name>
      <jdbc-table-name>ESTABLISHMENTS</jdbc-table-name>
      <cmp-field-jdbc-mapping>
     <field-name>id</field-name>
     <jdbc-field-name>DB_ESTABLISHMENT_ID</jdbc-field-name>
      </cmp-field-jdbc-mapping>
      <cmp-field-jdbc-mapping>
     <field-name>name</field-name>
<jdbc-field-name>DB_ESTABLISHMENT_NAME</jdbc-field-name>
      </cmp-field-jdbc-mapping>
    </jdbc-mapping>
</jonas-entity>

    <jonas-entity>
    <ejb-name>GradeEJB</ejb-name>
    <jndi-name>PGgradeHome</jndi-name>
     <cleanup>none</cleanup>
     <jdbc-mapping>
      <jndi-name>test_guia</jndi-name>
      <jdbc-table-name>GRADES</jdbc-table-name>
      <cmp-field-jdbc-mapping>
     <field-name>id</field-name>
     <jdbc-field-name>DB_GRADE_ID</jdbc-field-name>
      </cmp-field-jdbc-mapping>
      <cmp-field-jdbc-mapping>
     <field-name>grade</field-name>
     <jdbc-field-name>DB_GRADE</jdbc-field-name>
      </cmp-field-jdbc-mapping>
    
    </jdbc-mapping>
</jonas-entity>

    <jonas-entity>
    <ejb-name>VisitorCommentEJB</ejb-name>
    <jndi-name>PGVisitorCommentHome</jndi-name>
     <cleanup>none</cleanup>
     <jdbc-mapping>
      <jndi-name>test_guia</jndi-name>
      <jdbc-table-name>VISITORS_COMMENTS</jdbc-table-name>
      <cmp-field-jdbc-mapping>
     <field-name>id</field-name>
     <jdbc-field-name>DB_VISITOR_COMMENT_ID</jdbc-field-name>
      </cmp-field-jdbc-mapping>
      <cmp-field-jdbc-mapping>
     <field-name>comment</field-name>
     <jdbc-field-name>DB_COMMENT</jdbc-field-name>
      </cmp-field-jdbc-mapping>
        
    </jdbc-mapping>
</jonas-entity>
    
    <jonas-entity>
    <ejb-name>CountryEJB</ejb-name>
    <jndi-name>PGcountryHome</jndi-name>
          <cleanup>none</cleanup>
    <jdbc-mapping>
      <jndi-name>test_guia</jndi-name>
      <jdbc-table-name>COUNTRIES</jdbc-table-name>
      <cmp-field-jdbc-mapping>
     <field-name>id</field-name>
     <jdbc-field-name>DB_COUNTRY_ID</jdbc-field-name>
      </cmp-field-jdbc-mapping>
      <cmp-field-jdbc-mapping>
     <field-name>countryName</field-name>
     <jdbc-field-name>DB_COUNTRY_NAME_FR</jdbc-field-name>
      </cmp-field-jdbc-mapping>
    </jdbc-mapping>
</jonas-entity>

    <jonas-entity>
    <ejb-name>CategoryEJB</ejb-name>
    <jndi-name>PGcategoryHome</jndi-name>
    <cleanup>none</cleanup>
     <jdbc-mapping>
      <jndi-name>test_guia</jndi-name>
      <jdbc-table-name>CATEGORIES</jdbc-table-name>
      <cmp-field-jdbc-mapping>
     <field-name>id</field-name>
     <jdbc-field-name>DB_CATEGORY_ID</jdbc-field-name>
      </cmp-field-jdbc-mapping>
      <cmp-field-jdbc-mapping>
     <field-name>category</field-name>
     <jdbc-field-name>DB_CATEGORY_NAME_FR</jdbc-field-name>
      </cmp-field-jdbc-mapping>
    </jdbc-mapping>
</jonas-entity>

<jonas-ejb-relation>
      <ejb-relation-name>Establishment-VisitorComment</ejb-relation-name>
      <jonas-ejb-relationship-role>
        <ejb-relationship-role-name>Comment-belongs-to-Establishment</ejb-relationship-role-name>
        <foreign-key-jdbc-mapping>
          <foreign-key-jdbc-name>DB_ESTABLISHMENT_ID</foreign-key-jdbc-name>
        </foreign-key-jdbc-mapping>
      </jonas-ejb-relationship-role>
    </jonas-ejb-relation>
     
       <jonas-ejb-relation>
      <ejb-relation-name>Establishment-Grade</ejb-relation-name>
      <jonas-ejb-relationship-role>
        <ejb-relationship-role-name>Grade-belongs-to-Establishment</ejb-relationship-role-name>
        <foreign-key-jdbc-mapping>
          <foreign-key-jdbc-name>DB_ESTABLISHMENT_ID</foreign-key-jdbc-name>
        </foreign-key-jdbc-mapping>
      </jonas-ejb-relationship-role>
    </jonas-ejb-relation>
     
      <jonas-ejb-relation>
      <ejb-relation-name>Country-Establishment</ejb-relation-name>
      <jdbc-table-name>COUNTRIES_ESTABLISHMENTS</jdbc-table-name>
      <jonas-ejb-relationship-role>
        <ejb-relationship-role-name>Country-has-many-establishments</ejb-relationship-role-name>
        <foreign-key-jdbc-mapping>
          <foreign-key-jdbc-name>DB_ESTABLISHMENT_ID</foreign-key-jdbc-name>
        </foreign-key-jdbc-mapping>
      </jonas-ejb-relationship-role>
      <jonas-ejb-relationship-role>
        <ejb-relationship-role-name>Establishment-has-many-countries</ejb-relationship-role-name>
        <foreign-key-jdbc-mapping>
          <foreign-key-jdbc-name>DB_COUNTRY_ID</foreign-key-jdbc-name>
        </foreign-key-jdbc-mapping>
      </jonas-ejb-relationship-role>
    </jonas-ejb-relation>
     
      <jonas-ejb-relation>
      <ejb-relation-name>Establishment-Category</ejb-relation-name>
      <jdbc-table-name>ESTABLISHMENTS_CATEGORIES</jdbc-table-name>
      <jonas-ejb-relationship-role>
        <ejb-relationship-role-name>Establishment-has-many-categories</ejb-relationship-role-name>
        <foreign-key-jdbc-mapping>
          <foreign-key-jdbc-name>DB_CATEGORY_ID</foreign-key-jdbc-name>
        </foreign-key-jdbc-mapping>
      </jonas-ejb-relationship-role>
      <jonas-ejb-relationship-role>
        <ejb-relationship-role-name>Category-has-many-establishments</ejb-relationship-role-name>
        <foreign-key-jdbc-mapping>
          <foreign-key-jdbc-name>DB_ESTABLISHMENT_ID</foreign-key-jdbc-name>
        </foreign-key-jdbc-mapping>
      </jonas-ejb-relationship-role>
    </jonas-ejb-relation>
</jonas-ejb-jar>Here are the two classes for the beans
package com.softwareag.test_guide.establishmentEJB;
import java.util.Collection;
import java.util.Iterator;
import javax.ejb.CreateException;
import javax.ejb.EntityBean;
import javax.ejb.EntityContext;
import javax.ejb.RemoveException;
import com.softwareag.test_guide.ejb.util.PGServiceLocator;
import com.softwareag.test_guide.ejb.util.PGServiceLocatorException;
import com.softwareag.test_guide.gradeEJB.PGGradeLocal;
import com.softwareag.test_guide.visitorCommentEJB.PGVisitorCommentLocal;
import com.softwareag.test_guide.visitorCommentEJB.PGVisitorCommentLocalHome;
* @author Julien Martin
public abstract class PGEstablishmentBean implements EntityBean {
     public Integer ejbCreate(
          Integer id,
          String name,
          Collection visitorComments,
          Collection grades,
          Collection countries,
          Collection categories)
          throws CreateException {
          setId(id);
          setName(name);
          setVisitorComments(visitorComments);
          setGrades(grades);
          return null;
     public void ejbPostCreate(
          Integer id,
          String name,
          Collection visitorComments,
          Collection grades,
          Collection countries,
          Collection categories) {
          setCountries(countries);
          setCategories(categories);
     //Business methods
     public int getAverageGrade() {
          Collection grades = this.getGrades();
          if (grades.size() == 0) {
               return 0;
          } else {
               Iterator iterator = grades.iterator();
               int total = 0;
               while (iterator.hasNext()) {
                    PGGradeLocal pGGradeLocal = (PGGradeLocal) iterator.next();
                    Integer amount = pGGradeLocal.getGrade();
                    total = total + amount.intValue();
               float average = total / grades.size();
               int roundedAverage = Math.round(average);
               return roundedAverage;
     public void addComment(Integer id, String comment) {
          try {
               PGVisitorCommentLocalHome pGcommentHome =
                    (PGVisitorCommentLocalHome) PGServiceLocator.getInstance().getLocalHome("PGVisitorCommentHome_L");
               PGVisitorCommentLocal pGcomment = pGcommentHome.create(id, comment);
               Collection pGcomments = this.getVisitorComments();
               pGcomments.add(pGcomment);
          } catch (PGServiceLocatorException e) {
               e.printStackTrace();
          } catch (CreateException e) {
               e.printStackTrace();
     //Persistence fields
     public abstract Integer getId();
     public abstract void setId(Integer id);
     public abstract String getName();
     public abstract void setName(String name);
     //Relation fields
     public abstract Collection getVisitorComments();
     public abstract void setVisitorComments(Collection visitorComments);
     public abstract Collection getGrades();
     public abstract void setGrades(Collection grades);
     public abstract Collection getCountries();
     public abstract void setCountries(Collection countries);
     public abstract Collection getCategories();
     public abstract void setCategories(Collection categories);
     //Callback methods
     public void setEntityContext(EntityContext ec) {
     public void unsetEntityContext() {
     public void ejbLoad() {
     public void ejbStore() {
     public void ejbActivate() {
     public void ejbPassivate() {
     public void ejbRemove() throws RemoveException {
package com.softwareag.test_guide.visitorCommentEJB;
import javax.ejb.CreateException;
import javax.ejb.EntityBean;
import javax.ejb.EntityContext;
import javax.ejb.RemoveException;
* @author Julien Martin
public abstract class PGVisitorCommentBean implements EntityBean {
     public Integer ejbCreate(Integer id, String comment)throws CreateException {
          setId(id);
          setComment(comment);
          return null;
     public void ejbPostCreate(Integer id, String comment) {}
     //Persistence fields
     public abstract Integer getId();
     public abstract void setId(Integer id);
     public abstract String getComment();
     public abstract void setComment(String comment);
//     public abstract Integer getEstablishment_id();
//     public abstract void setEstablishment_id(Integer establishment_id);
     //Callback methods
     public void setEntityContext(EntityContext ec) {}
     public void unsetEntityContext() {}
     public void ejbLoad() {}
     public void ejbStore() {}
     public void ejbActivate() {}
     public void ejbPassivate() {}
     public void ejbRemove() throws RemoveException {}
}I get the following error from MYSQL:
22:57:10,203 : JOnASVisitorCommentEJBBean.ejbPostCreate : Failed to create bean:
java.sql.SQLException: General error, message from server: "Column 'DB_ESTABLISHMENT_ID' cannot be null"
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1626)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:886)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:945)
        at com.mysql.jdbc.Connection.execSQL(Connection.java:1844)
        at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1602)
        at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1488)
        at jorm.rdb.mysql.VisitorsCommentBinding.insertVISITORS_COMMENTSTable(VisitorsCommentBinding.java:558)
        at jorm.rdb.mysql.VisitorsCommentBinding.write(VisitorsCommentBinding.java:147)
        at com.softwareag.test_guide.visitorCommentEJB.JOnASVisitorCommentEJBBean.ejbPostCreate(JOnASVisitorCommentEJBBean.java:283)
        at com.softwareag.test_guide.visitorCommentEJB.JOnASVisitorCommentEJBLocalHome.create(JOnASVisitorCommentEJBLocalHome.java:76)
        at com.softwareag.test_guide.establishmentEJB.PGEstablishmentBean.addComment(PGEstablishmentBean.java:71)
        at com.softwareag.test_guide.establishmentEJB.JOnASEstablishmentEJBLocal.addComment(JOnASEstablishmentEJBLocal.java:170)
        at com.softwareag.test_guide.sessionFacadeEJB.PGSessionFacadeBean.addComment(PGSessionFacadeBean.java:80)
        at com.softwareag.test_guide.sessionFacadeEJB.JOnASPGSessionFacadeEJBLocal.addComment(JOnASPGSessionFacadeEJBLocal.java:168)
        at com.softwareag.test_guide.web.temp.PGBusinessDelegate.addComment(PGBusinessDelegate.java:93)
        at com.softwareag.test_guide.web.temp.PGCommentsManagedBean.addCommentAction(PGCommentsManagedBean.java:13)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:126)
        at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:72)
        at javax.faces.component.UICommand.broadcast(UICommand.java:312)
        at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:267)
        at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:381)
        at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:75)
        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:90)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
        at sun.reflect.GeneratedMethodAccessor208.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:241)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAsPrivileged(Subject.java:499)
        at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:263)
        at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:157)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
        at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:50)
        at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:140)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:136)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
        at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:793)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:702)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:571)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:644)
        at java.lang.Thread.run(Thread.java:536)
22:57:10,203 : JFactory.postInvoke : system exception in business method:
javax.ejb.EJBException: Failed to create bean: General error, message from server: "Column 'DB_ESTABLISHMENT_ID' cannot be null"
        at com.softwareag.test_guide.visitorCommentEJB.JOnASVisitorCommentEJBBean.ejbPostCreate(JOnASVisitorCommentEJBBean.java:288)
        at com.softwareag.test_guide.visitorCommentEJB.JOnASVisitorCommentEJBLocalHome.create(JOnASVisitorCommentEJBLocalHome.java:76)
        at com.softwareag.test_guide.establishmentEJB.PGEstablishmentBean.addComment(PGEstablishmentBean.java:71)
        at com.softwareag.test_guide.establishmentEJB.JOnASEstablishmentEJBLocal.addComment(JOnASEstablishmentEJBLocal.java:170)
        at com.softwareag.test_guide.sessionFacadeEJB.PGSessionFacadeBean.addComment(PGSessionFacadeBean.java:80)
        at com.softwareag.test_guide.sessionFacadeEJB.JOnASPGSessionFacadeEJBLocal.addComment(JOnASPGSessionFacadeEJBLocal.java:168)
        at com.softwareag.test_guide.web.temp.PGBusinessDelegate.addComment(PGBusinessDelegate.java:93)
        at com.softwareag.test_guide.web.temp.PGCommentsManagedBean.addCommentAction(PGComments

Thanks all for replying,
The error occurs when I run the client and not at deploy time. Here is the client code:
     public void addComment(Integer primaryKey, String comment) {
          System.out.println("primaryKey------>" + primaryKey);
          try {
               PGEstablishmentLocalHome establishmentHome = (PGEstablishmentLocalHome) PGServiceLocator.getInstance().getLocalHome("PGEstablishmentHome_L");
               PGEstablishmentLocal establishmentLocal = establishmentHome.findByPrimaryKey(primaryKey);
               establishmentLocal.addComment(primaryKey,comment);
          } catch (PGServiceLocatorException e) {
               e.printStackTrace();
          } catch (FinderException e) {
               e.printStackTrace();
u haven't defined the PK entry in the Establishment EJB Bean in DDYes look in the standard DD.
What's more I need both DD as I would with most ejb containers.
The field DB_ESTABLISHMENT_ID is required and I cannot set it to NULL.
Any other help greatly appreciated.
Julien Martin.

CMR setter problems

I am quite certain this is a bug either in JDeveloper or OC4J container.
Summary:
1). When foreign key field in the table is not null, using CMR setter give " Error creating EntityBean: ORA-01400: cannot insert NULL" errer".
2). Calling sessionBean that envolves a CMR setter in entityBean, a "Connection was not closed!" warning message is given.
Steps to reproduce:
1). Using JDeveloper 9.0.3.10.35
2). Create following two simple tables with 1-N relationship:
CREATE TABLE TASKS
TASK_ID      VARCHAR2(8) NOT NULL,
TASK_NAME VARCHAR2(2000) NOT NULL,
STATE_ID      VARCHAR2(20) NOT NULL
ALTER TABLE TASKS
ADD ( CONSTRAINT PK_TASKS PRIMARY KEY (TASK_ID) );
CREATE TABLE TASK_STATES
STATE_ID VARCHAR2(20) NOT NULL,
DESCRIPTION      VARCHAR2(120)      NULL
ALTER TABLE TASK_STATES
ADD ( CONSTRAINT PK_STATE PRIMARY KEY (STATE_ID) );
ALTER TABLE TASKS
ADD CONSTRAINT FK_TASK_STATE
FOREIGN KEY (STATE_ID)
REFERENCES TASK_STATES (STATE_ID);
COMMIT;
insert into TASK_STATES (STATE_ID, DESCRIPTION)
values ('ON','Task ON');
insert into TASK_STATES (STATE_ID, DESCRIPTION)
values ('OFF','Task OFF');
COMMIT;
3).Using JDeveloper to generate two CMP entityBeans. Look into ejbCreate and ejbPostCreate method. Notice CMR setter is in ejbCreate method. (this is a known bug to JDeveloper code generator).
4). Move CMR setter into jebPostCreate. Code would be like this:
public String ejbCreate(String task_id, String task_name, StatesLocal states_state_id)
setTask_id(task_id);
setTask_name(task_name);
//setStates_state_id(states_state_id);
return task_id;
public void ejbPostCreate(String task_id, String task_name, StatesLocal states_state_id)
setStates_state_id(states_state_id);
5). Generate SessionBean to create a method called addTask():
public void addTask(String task_id, String task_name, String state_id)
try
StatesLocal stateLocal = this.getStatesLocalHome().findByPrimaryKey(state_id);
this.getTasksLocalHome().create(task_id,task_name,stateLocal);
catch (... )
6). Generate Session Sample Client using JDeveloper to call addTask method:
mySessionEJB.addTask( "001", "first task", "OFF" );
7). Deploy project into JDeveloper Embedded OC4J, and run sample client.
Following exceptions occur:
avax.ejb.CreateException: Error creating EntityBean: ORA-01400: cannot insert NULL into ("HR8"."TASKS"."STATE_ID")
     mypackage1.TasksLocal TasksLocalHome_EntityHomeWrapper28.create(java.lang.String, java.lang.String, mypackage1.StatesLocal)
8). Try to runing client again, you will have following warning message:
DriverManagerConnectionPoolConnection not closed, check your code!(Use -Djdbc.connection.debug=true to find out where the leaked connection was created)DataSourceConnection was not closed!

You can define the not null column as deferred so that the constraint is enforced at the commit time and not while the record is inserted
create table test (
empno number(10) not null,
test varchar2(10) not null INITIALLY DEFERRED DEFERRABLE
regards
Debu

CMR module problems

I made some changes to a relationship between 2 CMP EJBs in a module that was generated by S1S4U1 for S1AS7; however, despite the EJB Relationship editor showing the right values, and the Bean class having the right type, when verifying with the S1Verifier, I get an error that the the field has in invalid type.
When I disasemble the class to view the signatures, sure enough, the included class file shows the old signature with the older types. Where is S1S4 picking up the old values - the source & all editors in S1S4 show the modified values. Thanks.
Arshad Noor
P.S. As an aside, how on earth does one crete a new module with Related CMP EJB's from a database, without overwriting exisitng interface and bean source files?
P.P.S. Any idea why, when deleting a .dbschema file and creating a new DB schema (after the schema has been changed in the DB), with the same .dbschema filename, S1S4 does not see the changed schema in the DB?

What is the error you are getting? Are you able to deploy the application without running the verifier? What version of studio are you using? If the studio is not updating, then you can post the same question in studio forum, Create the dbschema using the command line utility (appserv install>bin/dbschema).In previos version of studio, there was a bug with the db schema utility. If you have problem with studio, then post it at studio forum.
http://forte.sun.com/ffj/forums/index.html

Problem CMR ejb 3.0 with JDeveloper Preview 3

I created 2 entity beans (using drag and drop from JDeveloper 10.1.3 preview 3)
for 2 tables INCIDENTS and ENVINCIDENTS ENVINCIDENTS has a foreign key INCIDENTS_ID referring INCIDENTS.ID.I get the following error when I created ejb 3.0 beans and deployed them.
Exception Description: Multiple writable mappings exist for the field [ENVINCIDE
NTS.INCIDENTS_ID]. Only one may be defined as writable, all others must be spec
ified read-only.
If i remove the relationships they work fine. Also they work fine if I create ejb 2.1
the culprit bean is below:
@Id
@Column(name="INCIDENTS_ID", primaryKey=true, nullable=false)
public Long getIncidentsId() {
return incidentsId;
public void setIncidentsId(Long incidentsId) {
this.incidentsId = incidentsId;
@Id
@ManyToOne(targetEntity="model.Incidents")
@JoinColumn(name="ENVINCIDENTS.INCIDENTS_ID", referencedColumnName="INCIDENTS.ID",insertable=false, updatable=false)
public Incidents getIncidents() {
return incidents;
public void setIncidents(Incidents incidents) {
this.incidents = incidents;

Hi HERBOLY ,
To be able to run the clien you must run first the facade bean then try to run your client.
Hope this will help you .
Regards
Lutchumaya

EJB Finder View Links and CMR

Hi,
Can someone please give me some input on the following warning in the JDeveloper online help!
"Warning: You cannot create an EJB finder view link that expresses the same relationship as a CMR."
I'm new to EJB, BC4J and JDeveloper. I created container managed entity beans with local interfaces only to represent my data and relationships. No problems with the mapping so far.
To test the beans I used Session Facades with remote interfaces and build a sample test client.
Now I thought I could create EJB Entity Facades, EJB Finder View Objects, EJB Finder View Links and EJB Application Modules to make use of the BC4J framework in order to speed up programming clients (JSP and JClient).
So I've started studying the JDeveloper online help (which seems to be very useful) and found the above mentioned warning.
Well, better a warning than nothing at all, but some more explanations would have been even better.
Is there no need to use view links with CMR?
How to achieve the same functionality (synchronizing two view objects in a master-detail-relationship) with CMR?
Do you know any examples? I couldn't find any examples using EJB entity facades in the "sample code" area on OTN.
Any comments about other (better) architectures are also welcome. Would it be better to use BMP entity beans in conjunction with BC4J?
Many thanks for your help!
Regards,
Eric

Steven,
thank you for your reply and suggestions - I'll count on that. If I find time I'll read this book. It seems to be very interesting.
For educational purposes I'd like to look at both persistence implementation strategies. I agree that it looks definitly easier to use entity objects. Certainly it's also performancewise a better choice.
Anyhow, could you give me some useful tips for cmp entity beans and finder view objects?
Is there something which works completely different if I use BC4J on top of it?
How to implement a master-detail relationship in JClient (Swing) for example?
What about writing an ejbfinder which doesn't return all, but all data where the foreign key is equal to a parameter passed to the finder method and use this as the source for a detail view object. This could be the primary key of the selected master. Well, I don't know whether this is doable. But that's what comes to my mind spontaneously.
Would this be a solution? I'm still thinking about the aforementioned warning in the online help regarding view links.
I guess the problem is that the foreign key is not part of the entity bean as it's not a cmp-field. Instead you have accessor methods to retrieve a related object or a collection of objects.
I'm sure my questions are not too complicated to answer. It's only hard for a beginner to get an overview.
I'm quite confident that I'll manage this if I give my best and get some help from knowledgeable people like you Steven.
Regards,
Eric

Problem with 1-to-many relationship between entity beans

Hi All!
I have two tables TMP_GROUP and TMP_EMPLOYEE with following fields:
TMP_GROUP: ID, CAPTION, COMMENT, STATUS.
TMP_EMPLOYEE: ID, LOGIN, GROUP_ID.
For this tables i create two entity beans GROUP and EMPLOYEE respectively.
The relationship looks like this
descriptor ejb.xml:
<ejb-relation>
            <description>description</description>
            <ejb-relation-name>employeesOfGroup</ejb-relation-name>
            <ejb-relationship-role>
                <ejb-relationship-role-name>com.mypackage.GroupBean</ejb-relationship-role-name>
                <multiplicity>One</multiplicity>
                <relationship-role-source>
                    <ejb-name>GroupBean</ejb-name>
                </relationship-role-source>
                <cmr-field>
                    <cmr-field-name>employees</cmr-field-name>
                    <cmr-field-type>java.util.Collection</cmr-field-type>
                </cmr-field>
            </ejb-relationship-role>
            <ejb-relationship-role>
                <ejb-relationship-role-name>com.mypackage.EmployeeBean</ejb-relationship-role-name>
                <multiplicity>Many</multiplicity>
                <relationship-role-source>
                    <ejb-name>EmployeeBean</ejb-name>
                </relationship-role-source>
            </ejb-relationship-role>
        </ejb-relation>
descriptor persistent.xml:
<table-relation>
               <table-relationship-role
                    key-type="PrimaryKey">
                    <ejb-name>GroupBean</ejb-name>
                    <cmr-field>employees</cmr-field>
               </table-relationship-role>
               <table-relationship-role
                    key-type="NoKey">
                    <ejb-name>EmployeeBean</ejb-name>
                    <fk-column>
                         <column-name>GROUP_ID</column-name>
                         <pk-field-name>ejb_pk</pk-field-name>
                    </fk-column>
               </table-relationship-role>
          </table-relation>
Now i implement business method:
public Long addEmployee(String login, long groupId) {
          Long result;
          try {
               EmployeeLocal employee = employeeHome.create(login);
               GroupLocal group =
                    groupHome.findByPrimaryKey(new Long(groupId));
               Collection employees = group.getEmployees();
               employees.add(employee);
               result = (Long) employee.getPrimaryKey();
          } catch (CreateException ex) {
               result = new Long(0);
          } catch (FinderException ex) {
               result = new Long(0);
          return result;
When i call this method from web service, the following exception is raised:
com.sap.engine.services.ejb.exceptions.BaseTransactionRolledbackLocalException: Exception in method com.mypackage.GroupLocalHomeImpl0.findByPrimaryKey(java.lang.Object).
P.S.
1) I have transaction attribute set to "Required" for all methods of all beans
2) I have unique index for each table:
TMP_GROUP_I1: CAPTION
TMP_EMPLOYEE_I1: LOGIN (however i think GROUP_ID must be added here too)
3) I tried many:many relationship with this tables and it works fine
4) I try another implementation of addEmployee method with
EmployeeLocal employee = employeeHome.create(login, groupId);
without using GroupLocal cmr-field and GroupLocalHome findByPrimaryKey method, the result is same error.
Can somebody help me with this problem?
Thanks in advance.
Best regards, Abramov Andrey.

gimbal2 wrote:
1: The @JoinColumn on the listOfDepartments collection in Company is wrong. It should be something like this for a bidirectional relationship:
@OneToMany(mappedBy="company") // company is the matching property name in Department
private List <Department> listOfDepartment = new ArrayList<Department>();Note that I removed the fetch configuration; onetomany is fetched lazy by design. Saves some clutter eh.
2: use a Set in stead of a List (hibernate doesn't like lists much in entities and will break when you create slightly more complex entity relations)
3: don't just slap cascades on collections, especially of type ALL. Do it with care. In the many years I've been using JPA I've only had to cascade deletes in very specific situations, maybe once or twice. I never needed any of the other cascade types, they just invite sloppy code if you ask me. When working with persistence you should apply a little precision.I made all changes as you mentioned but still compID in department table shows null value...

Problem with 1:many relationship between entity beans.

Hi All!
I have two tables TMP_GROUP and TMP_EMPLOYEE with following fields:
TMP_GROUP: ID, CAPTION, COMMENT, STATUS.
TMP_EMPLOYEE: ID, LOGIN, GROUP_ID.
For this tables i create two entity beans GROUP and EMPLOYEE respectively.
The relationship looks like this
descriptor ejb.xml:
<ejb-relation>
            <description>description</description>
            <ejb-relation-name>employeesOfGroup</ejb-relation-name>
            <ejb-relationship-role>
                <ejb-relationship-role-name>com.mypackage.GroupBean</ejb-relationship-role-name>
                <multiplicity>One</multiplicity>
                <relationship-role-source>
                    <ejb-name>GroupBean</ejb-name>
                </relationship-role-source>
                <cmr-field>
                    <cmr-field-name>employees</cmr-field-name>
                    <cmr-field-type>java.util.Collection</cmr-field-type>
                </cmr-field>
            </ejb-relationship-role>
            <ejb-relationship-role>
                <ejb-relationship-role-name>com.mypackage.EmployeeBean</ejb-relationship-role-name>
                <multiplicity>Many</multiplicity>
                <relationship-role-source>
                    <ejb-name>EmployeeBean</ejb-name>
                </relationship-role-source>
            </ejb-relationship-role>
        </ejb-relation>
descriptor persistent.xml:
<table-relation>
               <table-relationship-role
                    key-type="PrimaryKey">
                    <ejb-name>GroupBean</ejb-name>
                    <cmr-field>employees</cmr-field>
               </table-relationship-role>
               <table-relationship-role
                    key-type="NoKey">
                    <ejb-name>EmployeeBean</ejb-name>
                    <fk-column>
                         <column-name>GROUP_ID</column-name>
                         <pk-field-name>ejb_pk</pk-field-name>
                    </fk-column>
               </table-relationship-role>
          </table-relation>
Now i implement business method:
public Long addEmployee(String login, long groupId) {
          Long result;
          try {
               EmployeeLocal employee = employeeHome.create(login);
               GroupLocal group =
                    groupHome.findByPrimaryKey(new Long(groupId));
               Collection employees = group.getEmployees();
               employees.add(employee);
               result = (Long) employee.getPrimaryKey();
          } catch (CreateException ex) {
               result = new Long(0);
          } catch (FinderException ex) {
               result = new Long(0);
          return result;
When i call this method from web service, the following exception is raised:
com.sap.engine.services.ejb.exceptions.BaseTransactionRolledbackLocalException: Exception in method com.mypackage.GroupLocalHomeImpl0.findByPrimaryKey(java.lang.Object).
P.S.
1) I have transaction attribute set to "Required" for all methods of all beans
2) I have unique index for each table:
TMP_GROUP_I1: CAPTION
TMP_EMPLOYEE_I1: LOGIN (however i think GROUP_ID must be added here too)
3) I tried many:many relationship with this tables and it works fine
4) I try another implementation of addEmployee method with
EmployeeLocal employee = employeeHome.create(login, groupId);
without using GroupLocal cmr-field and GroupLocalHome findByPrimaryKey method, the result is same error.
Can somebody help me with this problem?
Thanks in advance.
Best regards, Abramov Andrey.

I have posted excerpts from my orion-ejb-jar.xml file in this posting: Problem mapping a 1:M relationship between two entity EJBs w/ a compound PK
Sorry for the duplicate postings, but I was getting errors on the submission.
April

Unidirectional one-to-many CMR in OC4J 9.0.3.1699

Hi,
I have the following issue with the new (productiv) OC4J 9.0.3 build 020927.1699, with did not occur with
build 020725.1695. I would like to deploy local entity beans CMRDepartment -1--n-> CMREmployee with container managed relations. Here's the relation part of ejb-jar.xml
<ejb-relation>
<ejb-relation-name>theEmployees2theDepartment</ejb-relation-name>
<ejb-relationship-role>
<ejb-relationship-role-name>theEmployees</ejb-relationship-role-name>
<multiplicity>Many</multiplicity>
<relationship-role-source>
<ejb-name>CMREmployee</ejb-name>
</relationship-role-source>
</ejb-relationship-role>
<ejb-relationship-role>
<ejb-relationship-role-name>theDepartment</ejb-relationship-role-name>
<multiplicity>One</multiplicity>
<relationship-role-source>
<ejb-name>CMRDepartment</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>theEmployees</cmr-field-name>
<cmr-field-type>java.util.Collection</cmr-field-type>
</cmr-field>
</ejb-relationship-role>
</ejb-relation>
Now the problem is that the depoyment generates an database table CMREmployee_cmrtest_cmrtest for CMR with a foreign key column CMRDepartment_theEmployees referencing the CMRDepartment_cmrtest_cmrtest table for the CMRDepartment bean, even though the relation is not navigable from Emp to Dept. Is this a bug or a feature? Here's the CMREmployee part of the orion-ejb-jar.xml after deployment:
          <entity-deployment name="CMREmployee" location="CMREmployee" wrapper="CMREmployeeHome_EntityHomeWrapper27" local-wrapper="CMREmployeeLocalHome_EntityHomeWrapper16" table="CMREmployee_cmrtest_cmrtest" data-source="jdbc/OracleDS" exclusive-write-access="false" locking-mode="optimistic" update-changed-fields-only="true" delay-updates-until-commit="true" min-instances-per-pk="0" max-instances-per-pk="50" disable-wrapper-cache="true">
               <primkey-mapping>
                    <cmp-field-mapping name="id" persistence-name="id" />
               </primkey-mapping>
               <cmp-field-mapping name="name" persistence-name="name" />
               <cmp-field-mapping name="theAddress">
                    <entity-ref home="CMRAddress">
                         <cmp-field-mapping name="theAddress" persistence-name="theAddress" />
                    </entity-ref>
               </cmp-field-mapping>
               <cmp-field-mapping name="CMRDepartment_theEmployees">
                    <entity-ref home="CMRDepartment">
                         <cmp-field-mapping name="CMRDepartment_theEmployees" persistence-name="CMRDepartment_theEmployees" />
                    </entity-ref>
               </cmp-field-mapping>
               <cmp-field-mapping name="theProjects">
                    <collection-mapping table="CMRProject_CMREmployee__1ftrph">
                         <primkey-mapping>
                              <cmp-field-mapping name="CMREmployee_id">
                                   <entity-ref home="CMREmployee">
                                        <cmp-field-mapping name="CMREmployee_id" persistence-name="CMREmployee_id" />
                                   </entity-ref>
                              </cmp-field-mapping>
                         </primkey-mapping>
                         <value-mapping type="cmrtest.CMRProjectLocal">
                              <cmp-field-mapping name="CMRProject_id">
                                   <entity-ref home="CMRProject">
                                        <cmp-field-mapping name="CMRProject_id" persistence-name="CMRProject_id" />
                                   </entity-ref>
                              </cmp-field-mapping>
                         </value-mapping>
                    </collection-mapping>
               </cmp-field-mapping>
               <finder-method>
                    
                    <method>
                         <ejb-name>CMREmployee</ejb-name>
                         <method-name>findAllInstances</method-name>
                         <method-params>
                         </method-params>
                    </method>
               </finder-method>
               <ejb-ref-mapping name="ejb/references/theAddress/CMRAddressLocal" />
               <ejb-ref-mapping name="ejb/references/theProjects/CMRProjectLocal" />
               <resource-ref-mapping name="jdbc/EJBDataSource" />
               <resource-ref-mapping name="jms/EJBQueueConnectionFactory" />
               <resource-ref-mapping name="jms/EJBTopicConnectionFactory" />
               <resource-env-ref-mapping name="jms/EJBQueue" />
               <resource-env-ref-mapping name="jms/EJBTopic" />
          </entity-deployment>
Any hints would be very wellcome.
Regards
Stefan

Trond,
when ou deploy your application, you should not need to include the orion-ejb-jar.xml.
Also, if you have previously deployed the application, delete the application directory UNDER both applicatopn-deployments and applications. The directory will be your application's name.
Hope this helps,
Rob Cole
Oracle

CMR problem

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