Scout's Realtime metrics implementation via Pusher

gistfile1.rb

# Stream data for 20 minutes
while(streamer_start_time+MAX_DURATION > Time.now)
  data=[]
  # run each scout plugin (cpu usage, apache stats, etc)
  plugins.each do |plugin|
    plugin.run
    data << {
              # plugin.reports example data
	# [{"Idle %"=>95, "System %"=>1,"User %"=>4}]
               :fields=>plugin.reports.inject{|memo,hash|memo.merge(hash)},
               :name=> plugin['name']
               }
  end
  bundle={ :hostname=>hostname,
           :server_time=>Time.now.strftime("%I:%M:%S %p"),
           :data=>data }
  # stream the data via pusherapp
  Pusher[streaming_key].trigger!('server_data', bundle)
end