Transaction Model Patterns

Updating views at transaction boundaries

Pattern Name Problem Solution
Push Domain Model Changes When one user commits a transaction that updates the domain model on the server, how can a client application display these changes to a different user? The client registers as an observer of specific model components and the server notifies observers when changes occur.
Pull Domain Model Changes When one user commits a transaction that updates the domain model on the server, how can a client application display these changes to a different user? The client aborts its transaction periodically, in order to refresh its view of the repository.

Transaction Model Patterns