This week's book giveaways are in the Scala and Android forums. We're giving away four copies each of Machine Learning Systems: Designs that scale and Xamarin in Action: Creating native cross-platform mobile apps and have the authors on-line! See this thread and this one for details.
My question is about the exception and error handling in web application. If I use oracle procedures and functions for all business logic, then all the requests regarding select, update, delete and insertion of records using servlets, there might be a chance of run time errors and exceptions from oracle procedures. What is the best way to handle these exceptions and errors? and on which layer i handled these exceptions regarding transactions etc?