如何处理使用数据库的WCF服务中的并发性

Question

Hello :) I am quite new to WCF and this is my first time dealing with concurrency of any kind, so please bear with me.

What I want to do is to have a single instance of a service, which will be consumed by multiple clients (no more than 10 or 11). I want the clients to wait for each other when they consume the service operations. This way I should avoid incorrect updates of an entry in the data base. The operations are fast enough so that performance should not be affected too much. Now Im not sure, but to my understanding, to achieve that I should use a singleton service with ConcurrencyMode.Single, is that right ? Any comprehensive read on how to achieve that goal is welcome.

Also Im aware that there may be better and more elegant ways of handling concurrency, but Im very very short on time, and this method seems the simplest and fastest one to implement, if I have understood it correctly that is.

Answer 1

The worst you can do here is a singleton service.

Database engines (well, most of them) are well-suited for concurrent calls. What do you want to restrict their concurrent features for?

The best way for you is a per-call, stateless WCF service.
For data consistency, use optimistic concurrency . To simplify this you can use any ORM, like Entity Framework .