Class: MailyHerald::CLI

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/maily_herald/cli.rb

Instance Method Summary collapse

Instance Method Details

#daemon_running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/maily_herald/cli.rb', line 253

def daemon_running?
  read_pid > 0 && Process.kill(0, read_pid)
rescue
  return false
end

#daemonize ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/maily_herald/cli.rb', line 197

def daemonize
  return unless options[:daemon]

  raise ArgumentError, "You really should set a logfile if you're going to daemonize" unless options[:logfile]
  files_to_reopen = []
  ObjectSpace.each_object(File) do |file|
    files_to_reopen << file unless file.closed?
  end

  Process.daemon(true, true)

  files_to_reopen.each do |file|
    begin
      file.reopen file.path, "a+"
      file.sync = true
    rescue ::Exception
    end
  end

  [$stdout, $stderr].each do |io|
    File.open(options[:logfile], 'ab') do |f|
      io.reopen(f)
    end
    io.sync = true
  end
  $stdin.reopen('/dev/null')

  initialize_logger
end

#initialize_logger ⇒ Object 



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# File 'lib/maily_herald/cli.rb', line 102

def initialize_logger
  opts = {
    level: options[:verbose] ? Logger::DEBUG : Logger::INFO,
    progname: "cli",
  }
  opts[:target] = options[:logfile] if options[:logfile]

  MailyHerald::Logging.initialize(opts)
  MailyHerald.logger.info "Started with options: #{options}"
end

#kill_daemon ⇒ Object 



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# File 'lib/maily_herald/cli.rb', line 259

def kill_daemon
  Process.kill("INT", read_pid) if read_pid > 0
  return true
rescue
  return false
end

#options ⇒ Object 



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# File 'lib/maily_herald/cli.rb', line 193

def options
  MailyHerald.options
end

#paperboy ⇒ Object 



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# File 'lib/maily_herald/cli.rb', line 19

def paperboy
  if options[:action] == :stop
    kill_daemon || exit(0)
  elsif options[:action] == :ping
    if daemon_running?
      puts "PONG"
      exit(0)
    else
      puts "No response..."
      exit(1)
    end
  else
    if options[:action] == :restart 
      kill_daemon 
      5.times do
        if daemon_running?
          sleep 2
        else
          break
        end

        exit(0) if daemon_running?
      end
    end
    exit(0) if options[:action] == :start && daemon_running?

    daemonize
    write_pid

    self_read, self_write = IO.pipe

    %w(INT TERM USR1 USR2).each do |sig|
      trap sig do
        self_write.puts(sig)
      end
    end

    # We don't want to load whole app and its initializers just to set up Sidekiq client
    # so let's just do that instead:
    Sidekiq.redis = {url: options[:redis_url], namespace: options[:redis_namespace]}

    redis = MailyHerald.redis
    MailyHerald.logger.info "MailyHerald running in #{RUBY_DESCRIPTION}"

    if !options[:daemon]
      MailyHerald.logger.info 'Starting processing, hit Ctrl-C to stop'
    end

    begin
      worker = Thread.new do
        while true
          unless MailyHerald::Manager.job_enqueued?
            MailyHerald.run_all 
          else
            # TODO: this is not logged
            #MailyHerald.logger.error 'Unable to queue job'
          end

          sleep 20
        end
      end

      while readable_io = IO.select([self_read])
        signal = readable_io.first[0].gets.strip
        handle_signal(signal)
      end
    rescue Interrupt
      MailyHerald.logger.info 'Shutting down'
      worker.exit
      reset_pid
      exit(0)
    end
  end
end

#parse(args = ARGV) ⇒ Object 



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# File 'lib/maily_herald/cli.rb', line 14

def parse(args=ARGV)
  setup_options(args)
  initialize_logger
end

#parse_config(cfile) ⇒ Object 



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# File 'lib/maily_herald/cli.rb', line 184

def parse_config(cfile)
  opts = {}
  if File.exist?(cfile)
    opts = YAML.load(ERB.new(IO.read(cfile)).result)
    opts = opts.merge(opts.delete(@environment) || {})
  end
  opts
end

#parse_options(argv) ⇒ Object 



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# File 'lib/maily_herald/cli.rb', line 113

def parse_options(argv)
  opts = {}
  @parsers = {}

  @parsers[:paperboy] = OptionParser.new do |o|
    o.banner = "maily_herald paperboy [options]"

    o.on "--start", "Start Paperboy daemon" do |arg|
      opts[:action] = :start
      opts[:daemon] = true
    end

    o.on "--stop", "Stop Paperboy daemon" do |arg|
      opts[:action] = :stop
      opts[:daemon] = true
    end

    o.on "--restart", "Restart Paperboy daemon" do |arg|
      opts[:action] = :restart
      opts[:daemon] = true
    end

    o.on "--ping", "Check if Paperboy daemon is running" do |arg|
      opts[:action] = :ping
      opts[:daemon] = true
    end

    o.on '-L', '--logfile PATH', "path to writable logfile" do |arg|
      opts[:logfile] = arg
    end

    o.on '-P', '--pidfile PATH', "path to pidfile" do |arg|
      opts[:pidfile] = arg
    end
  end

  @parsers[:generic] = OptionParser.new do |o|
    o.banner = "maily_herald [paperboy] [options]"

    o.separator ""
    o.separator "Common options:"

    o.on '-c', '--config PATH', "path to YAML config file" do |arg|
      opts[:config_file] = arg
    end

    o.on '-e', '--environment ENV', "Application environment" do |arg|
      opts[:environment] = arg
    end

    o.on "-v", "--verbose", "Print more verbose output" do |arg|
      opts[:verbose] = arg
    end

    o.on_tail "-h", "--help", "Show help" do
      puts @parsers[:generic]
      puts
      puts @paperboy_parser
      exit 1
    end
  end

  if %w{paperboy}.include?(argv.first)
    opts[:mode] = argv.first.to_sym
    @parsers[argv.first.to_sym].parse!(argv)
  end
  @parsers[:generic].parse!(argv)

  opts
end

#read_pid ⇒ Object 



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# File 'lib/maily_herald/cli.rb', line 237

def read_pid
  if path = options[:pidfile]
    File.read(path).to_i
  end
end

#reset_pid ⇒ Object 



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# File 'lib/maily_herald/cli.rb', line 243

def reset_pid
  return unless options[:daemon]

  if path = options[:pidfile]
    File.open(path, 'w') do |f|
      f.puts nil
    end
  end
end

#setup_options(args) ⇒ Object 



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# File 'lib/maily_herald/cli.rb', line 94

def setup_options(args)
  cli = parse_options(args)

  set_environment cli[:environment]

  MailyHerald.options = MailyHerald.read_options(cli[:config_file] || "config/maily_herald.yml").merge(cli)
end

#write_pid ⇒ Object 



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# File 'lib/maily_herald/cli.rb', line 227

def write_pid
  return unless options[:daemon]

  if path = options[:pidfile]
    File.open(path, 'w') do |f|
      f.puts Process.pid
    end
  end
end