Class: Dokuen::Wrapper

Inherits:
Object
  • Object
show all
Defined in:
lib/dokuen/wrapper.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app, proc, index, portfile) ⇒ Wrapper

Returns a new instance of Wrapper.



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# File 'lib/dokuen/wrapper.rb', line 9

def initialize(app, proc, index, portfile)
  @release_dir = Dir.getwd
  @app = app
  @proc = proc
  @index = index
  @portfile = portfile
end

Instance Attribute Details

#app ⇒ Object (readonly)

Returns the value of attribute app.



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# File 'lib/dokuen/wrapper.rb', line 7

def app
  @app
end

#index ⇒ Object (readonly)

Returns the value of attribute index.



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# File 'lib/dokuen/wrapper.rb', line 7

def index
  @index
end

#portfile ⇒ Object (readonly)

Returns the value of attribute portfile.



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# File 'lib/dokuen/wrapper.rb', line 7

def portfile
  @portfile
end

#proc ⇒ Object (readonly)

Returns the value of attribute proc.



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# File 'lib/dokuen/wrapper.rb', line 7

def proc
  @proc
end

#release_dir ⇒ Object (readonly)

Returns the value of attribute release_dir.



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# File 'lib/dokuen/wrapper.rb', line 7

def release_dir
  @release_dir
end

Instance Method Details

#daemonize! ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 48

def daemonize!
  pf = File.join(pidfile)
  raise "Process already running!" if File.exists?(pf)

  return unless do_fork.nil?
  write_pidfile
  set_procname
  redirect
end

#do_fork ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 75

def do_fork
  raise 'first fork failed' if (pid = fork) == -1
  exit unless pid.nil?
  Process.setsid
  raise 'second fork failed' if (pid = fork) == -1
  exit unless pid.nil?
end

#errfile ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 40

def errfile
  File.join(procdir, "#{procname}.err")
end

#load_env ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 83

def load_env
  app.env.each do |key, val|
    ENV[key] = val
  end
end

#outfile ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 36

def outfile
  File.join(procdir, "#{procname}.out")
end

#pidfile ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 32

def pidfile
  File.join(procdir, "#{procname}.pid")
end

#port ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 44

def port
  File.basename(portfile).to_i
end

#procdir ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 28

def procdir
  File.join(release_dir, '.dokuen')
end

#procname ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 24

def procname
  "dokuen.#{app.name}.#{proc}.#{index}"
end

#redirect ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 58

def redirect
  $stdin.reopen("/dev/null")
  $stdout.sync = $stderr.sync = true
  $stdout.reopen(File.new(outfile, "a"))
  $stderr.reopen(File.new(errfile, "a"))
end

#run! ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 17

def run!
  return if daemonize! == nil
  loop do
    run_loop
  end
end

#run_loop ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 93

def run_loop
  load_env
  reader, writer = (IO.method(:pipe).arity == 0 ? IO.pipe : IO.pipe("BINARY"))
  procfile = Foreman::Procfile.new("Procfile")
  entry = procfile[proc]
  process = Foreman::Process.new(entry, index.to_i, port.to_i)
  log_path = "../../logs/#{procname}"
  log_file = File.open(log_path, 'a')

  Signal.trap("USR2") do
    process.kill(term_signal)
  end

  Signal.trap("TERM") do
    if not process.kill(term_signal)
      raise "Failed to kill process #{process.pid}"
    end

    File.delete(pidfile)
    File.delete("../../../../ports/#{port}")
    sleep 15

    if process.alive?
      process.kill("KILL")
    end

    exit! 0
  end

  process.run(writer, release_dir, {})
  thread = Thread.new do
    loop do
      data = reader.gets
      next unless data
      ps, message = data.split(",", 2)
      log_file.puts("[#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}][#{ps}] #{message}")
      log_file.flush
    end
  end
  Process.wait(process.pid)
  thread.exit
  reader.close
  writer.close
end

#set_procname ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 71

def set_procname
  $0 = procname
end

#term_signal ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 89

def term_signal
  app.config.stop_signal rescue 15
end

#write_pidfile ⇒ Object 



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# File 'lib/dokuen/wrapper.rb', line 65

def write_pidfile
  File.open(pidfile, "w+") do |f|
    f.write(YAML.dump({'pid' => Process.pid, 'port' => port}))
  end
end