feature B - create and read messages box

Data Source Layer

1.7 return messages box records

1.3 select messages box records

User

1.5 select user records

1.2 Select messages object and call findObject()

1.6 return user records

1.1 Invoke the create new events method

1.8 Create message object

1. Create a new event

1.9 Add new message record

1.4 Add new event record

1.3 Select user object and call findObject()

Business Logic Layer

1.2 Create event object

Presentation Layer

1.6 return messages box records

1.5 return messages box records

1.1 Invoke the show messages box method

1.7 return user records

Administrator

1.4 return messages box records

1. Read messages box

Database