Connections.xml usage in BC4J

Question

If i've defined a connection in my META-INF/connections.xml of the form:
<Reference name="ReposConn" credentialStoreKey="ReposConn" className="oracle.jdbc.pool.OracleDataSource">
<Factory className="oracle.jdbc.pool.OracleDataSource"/>
<RefAddresses>
<StringRefAddr addrType="sid">
<Contents>mysid</Contents>
</StringRefAddr>
<StringRefAddr addrType="subtype">
<Contents>oraJDBC</Contents>
</StringRefAddr>
<StringRefAddr addrType="user">
<Contents>user</Contents>
</StringRefAddr>
<StringRefAddr addrType="port">
<Contents>15041</Contents>
</StringRefAddr>
<StringRefAddr addrType="hostname">
<Contents>localhost</Contents>
</StringRefAddr>
<SecureRefAddr addrType="password"/>
<StringRefAddr addrType="DeployPassword">
<Contents>false</Contents>
</StringRefAddr>
<StringRefAddr addrType="oraDriverType">
<Contents>thin</Contents>
</StringRefAddr>
</RefAddresses>
and added the relevant chunk to the META-INF/credential-jazn-data.xml,
and added the following chunk to my META-INF/adf-config.xml:
<jndiC:adf-jndi-config xmlns="http://xmlns.oracle.com/adf/jndi/config"
initialContextFactoryClass="oracle.adf.share.jndi.InitialContextFactoryImpl"
backingStoreClass="oracle.adf.share.jndi.ResourceBackingStore"
backingStoreURL="/META-INF/connections.xml">
<contextEnv name="context1" value="JNDIContextValue" />
</jndiC:adf-jndi-config>
<sec:adf-config-child xmlns="http://xmlns.oracle.com/adf/security/config">
<CredentialStoreContext credentialStoreClass="oracle.adf.share.security.providers.jazn.JAZNCredentialStore"
credentialStoreDefaultUser="anonymous"
credentialStoreLocation="./credential-jazn-data.xml"/>
</sec:adf-config-child>
what do I have to do in my bc4j.xcfg to use this connection and is there anything about what's defined above which is incorrect?
thanks,
-Ian

Answer 1

Andrew:
Try the following steps:
1. Go to the IDE.
2. Select the EO (the one that will draw its data from a different
database).  Let's call this EO, MyEO.  Right-mouse click to edit the
EO.
3. Switch to the 'Java' panel.  Check the checkbox for 'Entity
collection Class'.  Apply the change.
4. You will see that MyEOCollImpl.java is generated.  This is the
custom Java class for the collection that manages instances of MyEO
rows (MyEOImpl instances).
In MyEOCollImpl.java add fields and methods to make connection to
the other database.  E.g.,
import oracle.jbo.server.EntityCache;
import java.sql.*;
public class MyEOCollImpl extends EntityCache
   Connection conn;
   public MyEOCollImpl()
      // Set up JDBC connection to the other database.
      DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
      conn = DriverManager.getConnection("jdbc:oracle:thin:scott/tiger@localhost:1521:ORCL");
5. Then, in MyEOImpl.java (not MyEOCollImpl.java), override the following methods:
   protected void doSelect(boolean lock)
   protected void doDML(int operation, TransactionEvent e)
The first is called to populate attriutes into the entity row.
The second is called to push edits back out to database.
In doSelect, use
   protected void populateAttribute(int index, Object value)
to populate attribute values.  'index' is the attr index.
Take a look at the following HOWTO doc:
   re:Certification
It will give you further info on these two methods.
Thanks.
Sung