How do I create a session with the datasource set in code not sessions.xml

Question

I want to create a session where I specify the J2EE datasource name dynamically in code. Normally, I would hard-code a J2EE datasource name in sessions.xml e.g.
<login>
<datasource>jdbc/MyApplicationDS</datasource>
<platform-class>oracle.toplink.platform.database.oracle.Oracle10Platform</platform-class>
<uses-external-connection-pool>true</uses-external-connection-pool>
<uses-external-transaction-controller>true</uses-external-transaction-controller>
</login>
However, we don't want to use a hard-coded string "jdbc/MyApplicationDS". We want to be able to set this at runtime.
I found this in the App Developer's Guide:
Configuring an External Connection Pool in Java
To configure the use of an external connection pool in Java:
1. Configure the DataSource on the server.
2. Configure the Login to specify a DataSource and the use of an external connection pool:
login.setConnector(
new JNDIConnector(new InitialContext(), "jdbc/MyApplicationDS"));
login.setUsesExternalConnectionPooling(true);
and this:
Configuring Sessions with the sessions.xml File
OracleAS TopLink provides two ways to preconfigure your sessions: you can export and compile Java source code from the OracleAS TopLink Mapping Workbench, or use the OracleAS TopLink Sessions Editor to build a session configuration file, the sessions.xml file.
It seems like I should export and compile Java code that calls login.setConnector(), but I can't find out any information on how to do this. I looked at the MW user guide and I didn't see anything on this.
I also found this by searching this discussion forum:
To create a server session completely from code given a project you can use,
project.getLogin().setConnector(new JNDIConnector(new InitialContext(), "your-datasource-url"));
project.getLogin().setUserName("");
project.getLogin().setPassword("");
Server server = project.createServerSession();
server.login();
However, I don't know how to get the project.
Thanks,
Vicki

Answer 1

If you are using a sessions.xml file, you can get your project from your session. Ensure that when you access your session from the SessionManager, that you do not have it login.
Session session = SessionManager.getManager().getSession("my-session", false);
session.getProject().setConnector(...);
session.login();
If not using a sessions.xml, you can either read your Project from the XMLProjectReader, or instantiate your Project class directly.