I have problems with step-by-step tutorial for ejb3.0

Question

I have seen the step-by-step tutorial for ejb3.0 using Jdeveloper and Oracle Application Server following the link: http://www.oracle.com/technology/products/jdev/101/tutorials/ejb_30/ejb_30.htm
The tutorial uses an Oracle database.
I tried to use a MSSQLServer 2000 database instead of the Oracle database an i got the folowing error:
javax.naming.NamingException: Lookup error: java.net.ConnectException: Connection refused: connect; nested exception is:
     java.net.ConnectException: Connection refused: connect [Root exception is java.net.ConnectException: Connection refused: connect]
     at com.evermind.server.rmi.RMIClientContext.lookup(RMIClientContext.java:68)
     at javax.naming.InitialContext.lookup(InitialContext.java:351)
     at buslogic.HRAppFacadeClient.main(HRAppFacadeClient.java:11)
Caused by: java.net.ConnectException: Connection refused: connect
     at java.net.PlainSocketImpl.socketConnect(Native Method)
     at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
     at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
     at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:364)
     at java.net.Socket.connect(Socket.java:507)
     at java.net.Socket.connect(Socket.java:457)
     at java.net.Socket.<init>(Socket.java:365)
     at java.net.Socket.<init>(Socket.java:207)
     at com.evermind.server.rmi.RMIClientConnection.createSocket(RMIClientConnection.java:641)
     at oracle.oc4j.rmi.ClientSocketRmiTransport.createNetworkConnection(ClientSocketRmiTransport.java:46)
     at oracle.oc4j.rmi.ClientRmiTransport.connectToServer(ClientRmiTransport.java:86)
     at com.evermind.server.rmi.RMIClientConnection.connect(RMIClientConnection.java:609)
     at com.evermind.server.rmi.RMIClientConnection.lookup(RMIClientConnection.java:151)
     at com.evermind.server.rmi.RMIClient.lookup(RMIClient.java:235)
     at com.evermind.server.rmi.RMIClientContext.lookup(RMIClientContext.java:55)
     ... 2 more
What should i change to make it work with the MSSQLServer 2000 database?
Could anyone help me with this problem?
Thanx!!

Answer 1

Hi,
I don't know the example but maybe I can give you some hints though. Your stacktrace doesn't look to be related to a datasource issue. So I see two questions:
1) What's about the error?
2) How to change the datasource from Oracle to MS SQLServer 2000?
Hope you didn't start at the end of the tutorial! ;-)
1)
The client tries to connect to the RMI-port of an OC4J instance to do some JNDI lookups, but cannot connect to the server socket.
Some questions:
Is your OC4J instance up and running BEFORE you start the client?
If you answer with yes:
Which port does the RMI server listen on? (netstat -a)
Is this port the same the client tries to use?
If you answer with yes:
Do you connect locally or via a network (do you use a firewall)?
2) The steps should include:
a) Create the database schema in SQLServer (this might include a conversion of ORACLE specific SQL to SQLServer specific syntax, Sequences and stuff like that)
b) Add the correct JDBC.Driver to your project
c) Create and test the datasource (try to use JDev)
d) Make sure that the EJB3 persistence implementation of OC4J (toplink) does support all necessary features of the MS Database. For example I'm not sure if native db sequences are supported for other RDBMS than Oracle. Don't know if you need them for your example
In theory this should all be quite simple and you don't have to write db specific code. ;-)
Hope this helps. If not, please ask more specifically!
Regards,
Eric