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.
No. An interceptor in Struts 2 makes it possible to call code before an Action is invoked. See here.
The class in Struts 2 that has the same function as RequestProcessor is org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter