Class: MessageBus::Diagnostics

Inherits:
Object
  • Object
show all
Defined in:
lib/message_bus/diagnostics.rb

Class Method Summary collapse

Class Method Details

.enable(bus = MessageBus) ⇒ Object 



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# File 'lib/message_bus/diagnostics.rb', line 26

def self.enable(bus = MessageBus)
  full_path = full_process_path
  start_time = Time.now.to_f
  hostname = self.hostname

  # it may make sense to add a channel per machine/host to streamline
  #  process to process comms
  bus.subscribe('/_diagnostics/hup') do |msg|
    if Process.pid == msg.data["pid"] && hostname == msg.data["hostname"]
      $shutdown = true
      sleep 4
      Process.kill("HUP", $$)
    end
  end

  bus.subscribe('/_diagnostics/discover') do |msg|
    bus.on_connect.call msg.site_id if bus.on_connect
    bus.publish '/_diagnostics/process-discovery', {
      pid: Process.pid,
      process_name: $0,
      full_path: full_path,
      uptime: (Time.now.to_f - start_time).to_i,
      hostname: hostname
    }, user_ids: [msg.data["user_id"]]
    bus.on_disconnect.call msg.site_id if bus.on_disconnect
  end
end

.full_process_path ⇒ Object 



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# File 'lib/message_bus/diagnostics.rb', line 2

def self.full_process_path
  begin
    system = `uname`.strip
    if system == "Darwin"
      `ps -o "comm=" -p #{Process.pid}`
    elsif system == "FreeBSD"
      `ps -o command -p #{Process.pid}`.split("\n",2)[1].strip()
    else
      info = `ps -eo "%p|$|%a" | grep '^\\s*#{Process.pid}'`
      info.strip.split('|$|')[1]
    end
  rescue
    # skip it ... not linux or something weird
  end
end

.hostname ⇒ Object 



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# File 'lib/message_bus/diagnostics.rb', line 18

def self.hostname
  begin
    `hostname`.strip
  rescue
    # skip it
  end
end