Class: MCollective::Application::Ping

Inherits:
MCollective::Application show all
Defined in:
lib/mcollective/application/ping.rb

Instance Method Summary collapse

Methods inherited from MCollective::Application

[], []=, #application_cli_arguments, #application_description, #application_failure, #application_options, application_options, #application_parse_options, #application_usage, #clioptions, #configuration, description, #disconnect, exclude_argument_sections, #halt, #halt_code, #help, intialize_application_options, option, #options, #rpcclient, #run, usage, #validate_cli_options, #validate_option

Methods included from RPC

const_missing, discovered, #empty_filter?, #printrpc, #printrpcstats, #rpcclient, #rpcoptions, stats

Instance Method Details

#main ⇒ Object 



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# File 'lib/mcollective/application/ping.rb', line 51

def main
  # If the user did not override the default timeout include the discovery timeout
  if options[:timeout] == 5
    discovery_timeout = options[:disctimeout] || Config.instance.discovery_timeout || 0
    options[:timeout] = options[:timeout] + discovery_timeout
  end
  client = MCollective::Client.new(options)

  start = Time.now.to_f
  times = []

  client.req("ping", "discovery") do |resp|
    times << (Time.now.to_f - start) * 1000

    puts "%-40s time=%.2f ms" % [resp[:senderid], times.last]
  end

  puts("\n\n---- ping statistics ----")

  if times.size > 0
    sum = times.inject(0){|acc,i|acc +i}
    avg = sum / times.length.to_f

    puts "%d replies max: %.2f min: %.2f avg: %.2f %s" % [times.size, times.max, times.min, avg, spark(times)]
  else
    puts("No responses received")
  end

  halt client.stats
end

#spark(resp_times) ⇒ Object

Convert the times structure into a array representing buckets of responses in 50 ms intervals. Return a small sparkline graph using UTF8 characters



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# File 'lib/mcollective/application/ping.rb', line 15

def spark(resp_times)
  return "" unless configuration[:graph] || Config.instance.pluginconf["rpc.graph"]

  ticks=%w[▁ ▂ ▃ ▄ ▅ ▆ ▇]

  histo = {}

  # round each time to its nearest 50ms
  # and keep a count for each 50ms
  resp_times.each do |time|
    time = Integer(time + 50 - (time % 50))
    histo[time] ||= 0
    histo[time] += 1
  end

  # set the 50ms intervals that saw no traffic to 0
  ((histo.keys.max - histo.keys.min) / 50).times do |i|
    time = (i * 50) + histo.keys.min
    histo[time] = 0 unless histo[time]
  end

  # get a numerically sorted list of times
  histo = histo.keys.sort.map{|k| histo[k]}

  range = histo.max - histo.min
  scale = ticks.size - 1
  distance = histo.max.to_f / scale

  histo.map do |val|
    tick = (val / distance).round
    tick = 0 if tick < 0

    ticks[tick]
  end.join
end