> Where is the class? I can see that there's a JCA structure, but I
> don't know how to make that fit what I need. Does JayBird support XA?

XADataSource is not yet implemented. You can try to do this yourself,
there's almost everything ready there:

client-java/src/pool/org/firebirdsql/pool/*.java

You would have to implement XADataSource interface in the
FBConnectionPoolDataSource.java (note, FBPooledConnection already
implements XAConnection interface).

If you do not want to do this, you have to figure out how to use JCA
with ATG Dynamo.

Best regards,
Roman Rokyskyy