Session handling in NuGram Hosted Server

Some time ago, I wrote a description of how session handling works in NuGram Hosted Server, which is implemented in Erlang. It's also briefly described on slide 15 of my talk at the Erlang Montreal meetup. Over on the Nu Echo blog, I wrote a short post explaining how the session timeout mechanism can be implemented using a plain Erlang/OTP gen_server behaviour. It's not a very profound post, but it's one of those areas where OTP shines (a very simple solution to a very common problem, and no need to reinvent the wheel).