I need to collect usage information on my on-demand application. This should include things like forms opened, time on form, buttons clicked etc. Data collected should be kept in a database (MongoDB) or file system. Is there a standard way to do so and/or an open source project for this?
It depends on amount of details you planing to collect, first of all, I would suggest you to check with Google Analytics, pretty much what they done is possible to replicate. If you just need to know which button/link on page people clicking more, you can use something like a ClickHeat