Class: EventedBluepill::Controller

Inherits:
Object
  • Object
show all
Defined in:
lib/evented_bluepill/controller.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Controller

Returns a new instance of Controller.



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# File 'lib/evented_bluepill/controller.rb', line 14

def initialize()
  self.log_file = EventedBluepill::Options[:log_file]
  self.base_dir = EventedBluepill::Options[:base_dir]

  setup_dir_structure
  cleanup_bluepill_directory
end

Instance Attribute Details

#base_dir ⇒ Object

Returns the value of attribute base_dir.



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# File 'lib/evented_bluepill/controller.rb', line 12

def base_dir
  @base_dir
end

#log_file ⇒ Object

Returns the value of attribute log_file.



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# File 'lib/evented_bluepill/controller.rb', line 12

def log_file
  @log_file
end

Instance Method Details

#grep_pattern(application, query = nil) ⇒ Object 



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# File 'lib/evented_bluepill/controller.rb', line 94

def grep_pattern(application, query = nil)
  pattern = [application, query].compact.join(':')
  ['\[.*', Regexp.escape(pattern), '.*'].compact.join
end

#handle_command(application, command, *args) ⇒ Object 



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# File 'lib/evented_bluepill/controller.rb', line 22

def handle_command(application, command, *args)
  case command.to_sym
  when :load
    file = args.first
    if File.exists?(file)
      # Restart the ruby interpreter for the config file so that anything loaded here
      # does not stay in memory for the daemon
      ruby = File.join(Config::CONFIG['bindir'], Config::CONFIG['ruby_install_name'])
      load_path = File.expand_path("#{File.dirname(__FILE__)}/../")
      file_path = File.expand_path(file)

      exec(ruby, "-I#{load_path}", '-revented_bluepill', file_path)
    else
      $stderr.puts "Can't find file: #{file}"
    end
  when :status
    puts self.send_to_daemon(application, :status, *args)
  when *EventedBluepill::Application::PROCESS_COMMANDS
    # these need to be sent to the daemon and the results printed out
    affected = self.send_to_daemon(application, command, *args)
    if affected.empty?
      puts "No processes effected"
    else
      puts "Sent #{command} to:"
      affected.each do |process|
        puts "  #{process}"
      end
    end
  when :quit
    pid = pid_for(application)
    if System.pid_alive?(pid)
      ::Process.kill("TERM", pid)
      puts "Killing evented_bluepilld[#{pid}]"
    else
      puts "evented_bluepilld[#{pid}] not running"
    end
  when :log
    log_file_location = self.send_to_daemon(application, :log_file)
    log_file_location = self.log_file if log_file_location.to_s.strip.empty?

    requested_pattern = args.first
    grep_pattern = self.grep_pattern(application, requested_pattern)

    tail = "tail -n 100 -f #{log_file_location} | grep -E '#{grep_pattern}'"
    puts "Tailing log for #{requested_pattern}..."
    Kernel.exec(tail)
  else
    $stderr.puts "Unknown command `%s` (or application `%s` has not been loaded yet)" % [command, command]
    exit(1)
  end
end

#send_to_daemon(application, command, *args) ⇒ Object 



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# File 'lib/evented_bluepill/controller.rb', line 74

def send_to_daemon(application, command, *args)
  begin
    verify_version!(application)

    command = ([command, *args]).join(":")
    response = Socket.client_command(base_dir, application, command)
    if response.is_a?(Exception)
      $stderr.puts "Received error from server:"
      $stderr.puts response.inspect
      $stderr.puts response.backtrace.join("\n")
      exit(8)
    else
      response
    end

  rescue Errno::ECONNREFUSED
    abort("Connection Refused: Server is not running")
  end
end