ASA Programming Guide
Three-Tier Computing and Distributed Transactions
Three-tier computing architecture
Sybase EAServer and Microsoft Transaction Server are both component servers. The application logic is held in the form of components, and made available to client applications.
Each component has a transaction attribute that indicates how the component participates in transactions. The application developer building the component must program the work of the transaction into the component—the resource manager connections, the operations on the data for which each resource manager is responsible. However, the application developer does not need to add transaction management logic to the component. Once the transaction attribute is set, to indicate that the component needs transaction management, EAServer uses DTC to enlist the transaction and manage the two-phase commit process.