----- Original Message -----
Sent: Friday, June 28, 2002 5:14
AM
Subject: [JBoss-user] [JBossCMP2.0]
Compound Primary Keys and CMR fields
I have an entity bean with
a compound primary key, where one of the fields is a cmr field. The
entity bean works perfectly after the first deployment. I can set primary
key, as well as do lookups and such. But after I redeploy (or restart) I get
the following error, whenever i attempt to findByPrimaryKey for a valid
record:
13:45:34,612 ERROR [STDERR] javax.ejb.FinderException:
Find failed: javax.ejb.EJBException: Internal
error getting results
for field member key
Embedded Exception
Unable to load a ResultSet
column into a variable of type '....MyKey'
13:45:34,675 ERROR
[STDERR] at
org.jboss.ejb.plugins.cmp.jdbc.JDBCAbstractQueryCommand.execute(J
DBCAbstractQueryCommand.java:143)
13:45:34,690
ERROR [STDERR] at
org.jboss.ejb.plugins.cmp.jdbc.JDBCFindEntityCommand.execute(JDBC
FindEntityCommand.java:44)
...
My question is, should what
I am doing work? If so then this is a bug (or some other problem). If not,
the beanvalidation should detect this senerio and not allow the beans
deployment.
Here's some more details on
what I am doing:
<entity>
<ejb-name>MyBean</ejb-name>
<prim-key-class>....MyKey</prim-key-class>
...
<cmp-field><field-name>key</field-name></cmp-field>
<cmp-field><field-name>year</field-name></cmp-field>
<cmp-field><field-name>month</field-name></cmp-field>
<primkey-field>key</primkey-field>
...
</entity>
<ejb-relation>
<ejb-relation-name>....</ejb-relation-name>
<ejb-relationship-role>
<ejb-relationship-role-name>.....</ejb-relationship-role-name>
<multiplicity>One</multiplicity>
<relationship-role-source>
<ejb-name>...some other
bean....</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>allMyBeans</cmr-field-name>
<cmr-field-type>java.util.Collection</cmr-field-type>
</cmr-field>
</ejb-relationship-role>
<ejb-relationship-role>
<ejb-relationship-role-name>.....</ejb-relationship-role-name>
<multiplicity>Many</multiplicity>
<relationship-role-source>
<ejb-name>MyBean</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>related</cmr-field-name>
</cmr-field>
</ejb-relationship-role>
</ejb-relation>
public class MyKey
implements Serializable{
private
String name;
private Integer
month;
private Integer year;
public
MyKey(){
}
public
MyKey(Integer year, Integer month, String
name){
this.name=
name;
this.month =
month;
this.year =
year;
}
public
String getName(){
return
name;
}
public
Integer getMonth(){
return
month;
}
public
Integer getYear(){
return
year;
}
public
boolean equals(Object obj){
}
public
int hashCode(){
return
getName().hashCode() ^ getYear().hashCode() ^
getMonth().hashCode();
}
}
public abstract class
MyBeanimplements EntityBean {
public
abstract MyKey getKey();
public abstract Integer
getYear();
public abstract Integer
getMonth();
public
abstract void setKey(MyKey key);
public abstract void
setYear(Integer year);
public abstract void
setMonth(Integer month);
public
abstract RelatedLocal getRelated();
public
abstract void setRelated(RelatedLocal related);
public
MyKey ejbCreate(Integer year, Integer month, String
name)
throws CreateException {
MyKey key = new MyKey(year, month,
name);
setKey(key);
setYear(year);
setMonth(month);
return
null;
}
public
void ejbPostCreate(Integer year, Integer month, String name)
{
RelatedHomeLocal home
=
RelatedLocal
related =
home.findByPrimaryKey(name);
setRelated(related);
}
.....
}
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