COM+ Unleashed

Design Considerations

Okay, so that's a look at COM+ transactions. To wrap it up, consider some of the critical design issues involved with COM+ transactional component construction.

Prefer Fine-Grained Components

Don't maintain transactions across method calls. Objects operating at a granularity of one transaction per method call perform much better than coarser-grained components. Requiring several client method calls to complete an operation produces objects that scale poorly because transaction resources (DTC Transaction objects, database connections, COM+ object state, and so on) have to be maintained by COM+ during the interim.

Fine-grained solutions are not only highly scalable but also much easier to debug. If each method call stands ...