Ruby at_exit

Here is a easy way we can ask ruby to execute something when a process is terminated. This applies mostly (but not only) to command-line code and daemons. Just use ‘at_exit’ in our process.

for example:

def run
  at_exit do
    puts "I am terminated, save me quickly"
  end
  loop {}
end

When I execute run and for some reason the process is (ex: ctrl+c), it will execute the codes in the block of at_exit

This trick helped us to stop some sub-process when stopping our message queue consumer daemon :)

Ruby at_exit for clever process termination