Class: Racecar::Ctl

Inherits:
Object
  • Object
show all
Defined in:
lib/racecar/ctl.rb

Defined Under Namespace

Classes: ProduceMessage

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(command) ⇒ Ctl

Returns a new instance of Ctl.



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# File 'lib/racecar/ctl.rb', line 31

def initialize(command)
  @command = command
end

Class Method Details

.main(args) ⇒ Object 



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# File 'lib/racecar/ctl.rb', line 12

def self.main(args)
  command = args.shift

  if command.nil?
    puts "No command specified. Commands:"
    puts " - status"
    puts " - stop"
    puts " - produce"
  else
    ctl = new(command)

    if ctl.respond_to?(command)
      ctl.send(command, args)
    else
      raise Racecar::Error, "invalid command: #{command}"
    end
  end
end

Instance Method Details

#liveness_probe(args) ⇒ Object 



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# File 'lib/racecar/ctl.rb', line 35

def liveness_probe(args)
  require "racecar/liveness_probe"
  parse_options!(args)

  if ENV["RAILS_ENV"] && File.exist?("config/racecar.yml")
    Racecar.config.load_file("config/racecar.yml", ENV["RAILS_ENV"])
  end

  if File.exist?("config/racecar.rb")
    require "./config/racecar"
  end

  Racecar.config.liveness_probe.check_liveness_within_interval!
end

#produce(args) ⇒ Object 



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# File 'lib/racecar/ctl.rb', line 81

def produce(args)
  message = ProduceMessage.new

  parser = OptionParser.new do |opts|
    opts.banner = "Usage: racecarctl produce [options]"

    opts.on("-v", "--value VALUE", "Set the message value") do |value|
      message.value = value
    end

    opts.on("-k", "--key KEY", "Set the message key") do |key|
      message.key = key
    end

    opts.on("-t", "--topic TOPIC", "Set the message topic") do |topic|
      message.topic = topic
    end
  end

  parser.parse!(args)

  if message.topic.nil?
    raise Racecar::Error, "no topic specified"
  end

  if message.value.nil?
    raise Racecar::Error, "no message value specified"
  end

  RailsConfigFileLoader.load!

  Racecar.config.validate!

  producer = Rdkafka::Config.new({
    "bootstrap.servers":  Racecar.config.brokers.join(","),
    "client.id":          Racecar.config.client_id,
    "message.timeout.ms": Racecar.config.message_timeout * 1000,
  }.merge(Racecar.config.rdkafka_producer)).producer

  handle = producer.produce(payload: message.value, key: message.key, topic: message.topic)
  begin
    handle.wait(max_wait_timeout: Racecar.config.message_timeout)
  rescue Rdkafka::RdkafkaError => e
    raise MessageDeliveryError.new(e, handle)
  end

  $stderr.puts "=> Delivered message to Kafka cluster"
end

#status(args) ⇒ Object 



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# File 'lib/racecar/ctl.rb', line 50

def status(args)
  parse_options!(args)

  pidfile = Racecar.config.pidfile
  daemon = Daemon.new(pidfile)

  if daemon.running?
    puts "running (PID = #{daemon.pid})"
  else
    puts daemon.pid_status
  end
end

#stop(args) ⇒ Object 



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# File 'lib/racecar/ctl.rb', line 63

def stop(args)
  parse_options!(args)

  pidfile = Racecar.config.pidfile
  daemon = Daemon.new(pidfile)

  if daemon.running?
    daemon.stop!
    while daemon.running?
      puts "Waiting for Racecar process to stop..."
      sleep 5
    end
    puts "Racecar stopped"
  else
    puts "Racecar is not currently running"
  end
end