How is it possible to send a connection handle established in one app to a custom class method in another app that it can use to do a SPT call?

Birds eye view. I have two apps that use common code to access AS400 table data that holds status information the app require to function. I have a third app that controls the AS400 table data.

I realize that a solution is have the app that contains the custom class to establish a static connection when it is active or the class could make the connection itself. The problem with the first solution is the app may not be running all the time, and the second solution is, I have approx 100 users that will be accessing the class method every few seconds, this many connects/disconnects would not be efficent. I need the connection running static on each users instance and use that connection in the class.