First, let's define what a module is on the context at hand; apart from the usual Java EE modules deployed in WebLogic Server—our applications and shared libraries, for instance—there are modules that group server resources such as JDBC and JMS components.
When we create a data source using WebLogic's administration console, we're actually creating a module inside the domain's configuration folder. This structure is read at the server's startup procedure to configure it properly.
You can check the folder
/opt/packt/domains/tickets/config/jdbc to see the JDBC modules, Ticket and Theater, defined in our server.
There are two kinds of such modules, classified according to the way they are defined: globally-scoped ...