Class: Roundhouse::CLI

Inherits:
Object
  • Object
show all
Includes:
Util, Singleton
Defined in:
lib/roundhouse/cli.rb

Constant Summary

Constants included from Util

Util::EXPIRY

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Util

#fire_event, #hostname, #identity, #logger, #process_nonce, #redis, #want_a_hertz_donut?, #watchdog

Methods included from ExceptionHandler

#handle_exception

Constructor Details

#initialize ⇒ CLI

Returns a new instance of CLI.



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# File 'lib/roundhouse/cli.rb', line 31

def initialize
  @code = nil
end

Instance Attribute Details

#code ⇒ Object

Used for CLI testing



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# File 'lib/roundhouse/cli.rb', line 27

def code
  @code
end

#environment ⇒ Object

Returns the value of attribute environment.



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# File 'lib/roundhouse/cli.rb', line 29

def environment
  @environment
end

#launcher ⇒ Object

Returns the value of attribute launcher.



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# File 'lib/roundhouse/cli.rb', line 28

def launcher
  @launcher
end

Class Method Details



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# File 'lib/roundhouse/cli.rb', line 103

def self.banner
%q{
______                      _ _                          
| ___ \                    | | |                         
| |_/ /___  _   _ _ __   __| | |__   ___  _   _ ___  ___ 
|    // _ \| | | | '_ \ / _` | '_ \ / _ \| | | / __|/ _ \
| |\ \ (_) | |_| | | | | (_| | | | | (_) | |_| \__ \  __/
\_| \_\___/ \__,_|_| |_|\__,_|_| |_|\___/ \__,_|___/\___|
                                                     
                                                     
}
end

Instance Method Details

#handle_signal(sig) ⇒ Object 



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# File 'lib/roundhouse/cli.rb', line 116

def handle_signal(sig)
  Roundhouse.logger.debug "Got #{sig} signal"
  case sig
  when 'INT'
    # Handle Ctrl-C in JRuby like MRI
    # http://jira.codehaus.org/browse/JRUBY-4637
    raise Interrupt
  when 'TERM'
    # Heroku sends TERM and then waits 10 seconds for process to exit.
    raise Interrupt
  when 'USR1'
    Roundhouse.logger.info "Received USR1, no longer accepting new work"
    launcher.manager.async.stop
    fire_event(:quiet, true)
  when 'USR2'
    if Roundhouse.options[:logfile]
      Roundhouse.logger.info "Received USR2, reopening log file"
      Roundhouse::Logging.reopen_logs
    end
  when 'TTIN'
    Thread.list.each do |thread|
      Roundhouse.logger.warn "Thread TID-#{thread.object_id.to_s(36)} #{thread['label']}"
      if thread.backtrace
        Roundhouse.logger.warn thread.backtrace.join("\n")
      else
        Roundhouse.logger.warn "<no backtrace available>"
      end
    end
  end
end

#parse(args = ARGV) ⇒ Object 



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# File 'lib/roundhouse/cli.rb', line 35

def parse(args=ARGV)
  @code = nil

  setup_options(args)
  initialize_logger
  validate!
  daemonize
  write_pid
  load_celluloid
end

#run ⇒ Object

Code within this method is not tested because it alters global process state irreversibly. PRs which improve the test coverage of Roundhouse::CLI are welcomed.



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# File 'lib/roundhouse/cli.rb', line 49

def run
  boot_system
  print_banner

  self_read, self_write = IO.pipe

  %w(INT TERM USR1 USR2 TTIN).each do |sig|
    begin
      trap sig do
        self_write.puts(sig)
      end
    rescue ArgumentError
      puts "Signal #{sig} not supported"
    end
  end

  logger.info "Running in #{RUBY_DESCRIPTION}"
  logger.info Roundhouse::LICENSE

  fire_event(:startup)

  logger.debug {
    "Middleware: #{Roundhouse.server_middleware.map(&:klass).join(', ')}"
  }

  Roundhouse.redis do |conn|
    # touch the connection pool so it is created before we
    # launch the actors.
  end

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

  require 'roundhouse/launcher'
  @launcher = Roundhouse::Launcher.new(options)

  begin
    launcher.run

    while readable_io = IO.select([self_read])
      signal = readable_io.first[0].gets.strip
      handle_signal(signal)
    end
  rescue Interrupt
    logger.info 'Shutting down'
    launcher.stop
    fire_event(:shutdown, true)
    # Explicitly exit so busy Processor threads can't block
    # process shutdown.
    exit(0)
  end
end