JDeveloper 10.1.3.3 and Embedded OC4J server

Question

This is the Embedded OC4J server on JDeveloper 10.1.3.3 I have pointed it to compile in Java SDK 1.4.2_14
I have set up the projects datasources to use the JDBC driver ojdbc14.jar
[Starting OC4J using the following ports: HTTP=8988, RMI=23891, JMS=9227.]
**** Unable to obtain password from principals.xml. Using default.
C:\jdev\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\config>
C:\j2sdk1.4.2_14\bin\javaw.exe -ojvm -classpath C:\jdev\j2ee\home\oc4j.jar;C:\jdev\jdev\lib\jdev-oc4j-embedded.jar -Xverify:none -DcheckForUpdates=adminClientOnly -Doracle.application.environment=development -Doracle.j2ee.http.socket.timeout=500 -Doc4j.jms.usePersistenceLockFiles=false oracle.oc4j.loader.boot.BootStrap -config C:\jdev\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\config\server.xml
[waiting for the server to complete its initialization...]
*WARNING: Code-source C:\jdev\jdbc\lib\ojdbc14.jar (from <library> in /C:/jdev/jdev/mywork/NJTransit/NJTransit-oc4j-app.xml) has the same filename but is not identical to /C:/jdev/jdbc/lib/ojdbc14dms.jar (from <code-source> (ignore manifest Class-Path) in META-INF/boot.xml in C:\jdev\j2ee\home\oc4j.jar). If it contains different versions of the same classes, it will be masked as the latter is already visible in the search path of loader current-workspace-app.root:0.0.0.
*Ready message received from Oc4jNotifier.
Embedded OC4J startup time: 4421 ms.
Target URL -- http://207.200.160.250:8988/NJTransit-NJTransit-context-root/index.jsp
12/03/08 14:58:05 Oracle Containers for J2EE 10g (10.1.3.0.0) initialized
My question is why is it having trouble distinguishing between ojdbc14.jar and ojdbc14dms.jar
as a result I am getting unexpected behavior from the Application
Declaration in my code
int mypidm;
String sql1 = "SELECT SPRIDEN_PIDM FROM SPRIDEN WHERE SPRIDEN_ID = UPPER(?)";
try{
PreparedStatement pstmt = conn.prepareStatement(sql1);
pstmt.setString(1, studid);
ResultSet rs;
rs = pstmt.executeQuery();
//mypidm = rs.getInt("SPRIDEN_PIDM");
This part of the code drops through i.e. rs.next() always gets a false result
while (rs.next()) //evaluates to false so mypidm is always zero.
mypidm = rs.getInt("SPRIDEN_PIDM");
I am thinking that these two things are related.
Any Thoughts.

Answer 1

The tables are not created by default. You can configure your persistence.xml to define how you want tables to be created. The persistence.xml properties are defined in the TopLink class, EntityManagerFactoryProvider (oracle.toplink.<essentials>.ejb.cmp3).
Set the property, "toplink.ddl-generation" to "drop-and-create-tables" if you want them recreated every time your redeploy. Note this will delete all previous data in the tables, so make sure you do not leave this setting on when you go into production.