1. Customer
Events
Manager
(Procedure A)
Insert, Update & Delete Events
With pre & post data
(event set E) R
Status
Report
Trip
Report
Thick lines are method invocations or updates
Thin lines are event announcements
Deleted_Customer
R.DeleteStatusReports(CustomerId)
R.DeleteTripReports(CustomerID)
Updated_Customer_CustomerID
R.UpdateCustomerID(CustomerId)
Inserted_TripReport
R.ValidateExists(CustomerID)
Inserted_StatusReport EM
A mediators based design for maintaining a one to many relationship from Customers to StatusReports & TripReports

2. C R' L EM Customer Insert, Update & Delete Events Events Manager
(Procedure A) R'
Insert, Update & Delete Events
With pre & post data
(event set E)
Status
Report
Trip
Report L
Thick lines are method invocations or updates
Thin lines are event announcements
Deleted_Customer
R’.TxDeleteTripAndStatus
Updated_Customer_CustomerID
R’.TxUpdateCustomerID(CustomerId)
Inserted_TripReport
R’.ValidateExists(CustomerID)
Inserted_StatusReport EM