Class: Baykit::BayServer::Docker::Cgi::CgiReqContentHandler

Inherits:
Object
  • Object
show all
Includes:
Agent, Agent::Multiplexer, Common, Common::Postpone, Rudders, Tours, Tours::ReqContentHandler, Train, Util
Defined in:
lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb

Constant Summary collapse

READ_CHUNK_SIZE = 
8192

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cgi_docker, tur, env) ⇒ CgiReqContentHandler

Returns a new instance of CgiReqContentHandler.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 45

def initialize(cgi_docker, tur, env)
  @cgi_docker = cgi_docker
  @tour = tur
  @tour_id = tur.tour_id
  @env = env
  @pid = 0
  @std_in_rd = nil
  @std_out_rd = nil
  @std_err_rd = nil
  @std_out_closed = true
  @std_err_closed = true
  @buffers = []
end

Instance Attribute Details

#available ⇒ Object (readonly)

Returns the value of attribute available.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 33

def available
  @available
end

#buffers ⇒ Object (readonly)

Returns the value of attribute buffers.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 43

def buffers
  @buffers
end

#cgi_docker ⇒ Object (readonly)

Returns the value of attribute cgi_docker.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 30

def cgi_docker
  @cgi_docker
end

#env ⇒ Object (readonly)

Returns the value of attribute env.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 42

def env
  @env
end

#last_access ⇒ Object (readonly)

Returns the value of attribute last_access.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 40

def last_access
  @last_access
end

#multiplexer ⇒ Object

Returns the value of attribute multiplexer.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 41

def multiplexer
  @multiplexer
end

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 34

def pid
  @pid
end

#std_err_closed ⇒ Object (readonly)

Returns the value of attribute std_err_closed.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 39

def std_err_closed
  @std_err_closed
end

#std_err_rd ⇒ Object (readonly)

Returns the value of attribute std_err_rd.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 37

def std_err_rd
  @std_err_rd
end

#std_in_rd ⇒ Object (readonly)

Returns the value of attribute std_in_rd.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 35

def std_in_rd
  @std_in_rd
end

#std_out_closed ⇒ Object (readonly)

Returns the value of attribute std_out_closed.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 38

def std_out_closed
  @std_out_closed
end

#std_out_rd ⇒ Object (readonly)

Returns the value of attribute std_out_rd.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 36

def std_out_rd
  @std_out_rd
end

#tour ⇒ Object (readonly)

Returns the value of attribute tour.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 31

def tour
  @tour
end

#tour_id ⇒ Object (readonly)

Returns the value of attribute tour_id.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 32

def tour_id
  @tour_id
end

Instance Method Details

#access ⇒ Object 



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 237

def access()
  @last_access = Time.now.tv_sec
end

#on_abort_req(tur) ⇒ Object 



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 89

def on_abort_req(tur)
  BayLog.debug("%s CGI:abortReq", tur)

  if !@std_out_closed
    @multiplexer.req_close(@std_out_rd)
  end
  if !@std_err_closed
    @multiplexer.req_close(@std_err_rd)
  end

  if @pid == nil
    BayLog.warn("%s Cannot kill process (pid is null)", tur)
  else
    BayLog.debug("%s KILL PROCESS!: %d", tur, @pid)
    Process.kill('KILL', @pid)
  end

  return false  # not aborted immediately
end

#on_end_req_content(tur) ⇒ Object 



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 84

def on_end_req_content(tur)
  BayLog.trace("%s CGI:endReqContent", tur)
  access()
end

#on_read_req_content(tur, buf, start, len, &callback) ⇒ Object

Implements ReqContentHandler



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 72

def on_read_req_content(tur, buf, start, len, &callback)
  BayLog.debug("%s CGI:onReadReqContent: len=%d", tur, len)

  if @pid != 0
    write_to_std_in(tur, buf, start, len, &callback)
  else
    # postponed
    @buffers << [buf[start, len].dup, callback]
  end
  access()
end

#process_finished ⇒ Object 



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 257

def process_finished()
  BayLog.debug("%s CGI Process finished: pid=%s", @tour, @pid)

  pid, stat = Process.wait2(@pid)
  BayLog.debug("%s CGI Process finished: pid=%s code=%s", @tour, pid, stat.exitstatus)
  agt_id = @tour.ship.agent_id

  begin
    if stat.exitstatus != 0
      # Exec failed
      BayLog.error("%s CGI Invalid exit status pid=%d code=%s", @tour, @pid, stat.exitstatus)
      @tour.res.send_error(@tour_id, HttpStatus::INTERNAL_SERVER_ERROR, "Invalid exit Status")
    else
      @tour.res.end_res_content(@tour_id)
    end
  rescue IOError => e
    BayLog.error_e(e)
  end

  @cgi_docker.sub_process_count
  if @cgi_docker.get_wait_count > 0
    BayLog.warn("agt#%d Catch up postponed process: process wait count=%d", agt_id, @cgi_docker.get_wait_count)
    agt = GrandAgent.get(agt_id)
    agt.req_catch_up
  end
end

#req_start_tour ⇒ Object

Other methods



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 113

def req_start_tour
  if @cgi_docker.add_process_count
    BayLog.info("%s start tour: wait count=%d", @tour, @cgi_docker.get_wait_count)
    start_tour
  else
    BayLog.warn("%s Cannot start tour: wait count=%d", @tour, @cgi_docker.get_wait_count)
    agt = GrandAgent.get(@tour.ship.agent_id)
    agt.add_postpone(self)
  end
  access()
end

#run ⇒ Object

Implements Postpone



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 62

def run
  @cgi_docker.sub_wait_count
  BayLog.info("%s challenge postponed tour", @tour, @cgi_docker.get_wait_count)
  req_start_tour
end

#start_tour ⇒ Object 



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 125

def start_tour
  @available = false

  std_in = IO.pipe()
  std_out = IO.pipe()
  std_err = IO.pipe()
  std_in[1].set_encoding("ASCII-8BIT")
  std_out[0].set_encoding("ASCII-8BIT")
  std_err[0].set_encoding("ASCII-8BIT")

  command = @cgi_docker.create_command(@env)
  BayLog.debug("%s Spawn: %s", @tour, command)
  @pid = Process.spawn(env, command, :in => std_in[0], :out => std_out[1], :err => std_err[1])
  BayLog.debug("%s created process; %s", @tour, @pid)

  std_in[0].close()
  std_out[1].close()
  std_err[1].close()

  @std_in_rd = IORudder.new(std_in[1])
  @std_out_rd = IORudder.new(std_out[0])
  @std_err_rd = IORudder.new(std_err[0])
  BayLog.debug("#{@tour} PID: #{pid}")

  @buffers.each do |pair|
    BayLog.debug("%s write postponed data: len=%d", @tour, pair[0].length)
    write_to_std_in(@tour, pair[0], 0, pair[0].length, &pair[1])
  end

  @std_out_closed = false
  @std_err_closed = false

  bufsize = 8192

  agt = GrandAgent.get(@tour.ship.agent_id)

  case(BayServer.harbor.cgi_multiplexer)
  when Harbor::MULTIPLEXER_TYPE_SPIDER
    mpx = agt.spider_multiplexer
    @std_out_rd.set_non_blocking
    @std_err_rd.set_non_blocking

  when Harbor::MULTIPLEXER_TYPE_SPIN

    def eof_checker()
      begin
        pid = Process.wait(handler.pid,  Process::WNOHANG)
        return pid != nil
      rescue Errno::ECHILD => e
        BayLog.error_e(e)
        return true
      end
    end
    mpx = agt.spin_multiplexer
    @std_out_rd.set_non_blocking
    @std_err_rd.set_non_blocking

  when Harbor::MULTIPLEXER_TYPE_TAXI
    mpx = agt.taxi_multiplexer

  when Harbor::MULTIPLEXER_TYPE_JOB
    mpx = agt.job_multiplexer

  else
    raise Sink.new();
  end

  if mpx != nil
    @multiplexer = mpx
    out_ship = CgiStdOutShip.new
    out_tp = PlainTransporter.new(agt.net_multiplexer, out_ship, false, bufsize, false)

    out_ship.init_std_out(@std_out_rd, @tour.ship.agent_id, @tour, out_tp, self)

    out_st = RudderStateStore.get_store(agt.agent_id).rent()
    out_st.init(@std_out_rd, out_tp)
    mpx.add_rudder_state(@std_out_rd, out_st)

    ship_id = out_ship.ship_id
    @tour.res.set_consume_listener do |len, resume|
      if resume
        out_ship.resume_read(ship_id)
      end
    end

    err_ship = CgiStdErrShip.new
    err_tp = PlainTransporter.new(agt.net_multiplexer, err_ship, false, bufsize, false)
    err_ship.init_std_err(@std_err_rd, @tour.ship.agent_id, self)

    err_st = RudderStateStore.get_store(agt.agent_id).rent()
    err_st.init(@std_err_rd, err_tp)
    mpx.add_rudder_state(@std_err_rd, err_st)

    mpx.req_read(@std_out_rd)
    mpx.req_read(@std_err_rd)
  end
end

#timed_out ⇒ Object 



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 241

def timed_out()
  if @cgi_docker.timeout_sec <= 0
    return false
  end

  duration_sec = Time.now.tv_sec - @last_access
  BayLog.debug("%s Check CGI timeout: dur=%d, timeout=%d", @tour, duration_sec, @cgi_docker.timeout_sec)
  return duration_sec > @cgi_docker.timeout_sec
end

#write_to_std_in(tur, buf, start, len, &callback) ⇒ Object 



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# File 'lib/baykit/bayserver/docker/cgi/cgi_req_content_handler.rb', line 251

def write_to_std_in(tur, buf, start, len, &callback)
  wrote_len = @std_in_rd.write(buf[start, len])
  BayLog.debug("%s CGI:onReadReqContent: wrote=%d", tur, wrote_len)
  tur.req.consumed(Tour::TOUR_ID_NOCHECK, len, &callback)
end