We have released an article "Response cache". In it, we present how to solve a widely discussed problem of preventing the double clicking in the web applications at server-side.
The described solution handles this problem in a very universal and transparent way - it takes care of displaying only the first meaningful response, just like in situations where no double clicking is performed by the user.
The business logic gets only one request and every action is executed only once. It can be applied to any existing java-based web application with almost no additional work.