Creating the OnEndSession Method

We can add a new class method named OnEndSession to the Cinema.UtilsOpens in a new tab class by simply adding the following text to its class definition within the class editor window. Alternatively, you can use the New Method wizard.

Utils.OnEndSession

ClassMethod OnEndSession()
{
     If $data(%session.Data("Order")) {
        // Delete the incomplete order
        Do ##class(Cinema.TicketOrder).%DeleteId(%session.Data("Order"))
         Kill %session.Data("Order")
    }
    Quit
}

The main thing this code does is to delete the incomplete TicketOrder object from the database. (The related TicketItem objects are deleted automatically when their TicketOrder object is deleted.)