This week's book giveaway is in the General Computing forum. We're giving away four copies of Arduino in Action and have Martin Evans, Joshua Noble, and Jordan Hochenbaum on-line! See this thread for details.
We need to do logical data validation for our published web services and we're not exactly sure where to put this logic.
For example we have a web service that will add new users to our system, but each user must have a unique username. So when adding a new user we must check to see if the new username is available (requiring a database hit). If not, we need to send be an error or a fault.
I was thinking of using an Axis2 Handler for the job, but I don't seem to be able to return an error or a fault inside of the Handlers.
Any friendly help or a push in the right direction is appreciated.