Class: Baykit::BayServer::Docker::Cgi::CgiTrain

Inherits:
Train::Train
  • Object
show all
Includes:
Agent, Tours, Tours::ReqContentHandler, Train, Util
Defined in:
lib/baykit/bayserver/docker/cgi/cgi_train.rb

Constant Summary collapse

READ_CHUNK_SIZE = 
8192

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cgi_docker, tur) ⇒ CgiTrain

Returns a new instance of CgiTrain.



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

def initialize(cgi_docker, tur)
  super(tur)
  @cgi_docker = cgi_docker
end

Instance Attribute Details

#available ⇒ Object (readonly)

Returns the value of attribute available.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_train.rb', line 23

def available
  @available
end

#cgi_docker ⇒ Object (readonly)

Returns the value of attribute cgi_docker.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_train.rb', line 21

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_train.rb', line 22

def env
  @env
end

#lock ⇒ Object (readonly)

Returns the value of attribute lock.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_train.rb', line 24

def lock
  @lock
end

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_train.rb', line 25

def pid
  @pid
end

#std_err ⇒ Object (readonly)

Returns the value of attribute std_err.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_train.rb', line 28

def std_err
  @std_err
end

#std_in ⇒ Object (readonly)

Returns the value of attribute std_in.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_train.rb', line 26

def std_in
  @std_in
end

#std_out ⇒ Object (readonly)

Returns the value of attribute std_out.



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# File 'lib/baykit/bayserver/docker/cgi/cgi_train.rb', line 27

def std_out
  @std_out
end

Instance Method Details

#close_pipes ⇒ Object 



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# File 'lib/baykit/bayserver/docker/cgi/cgi_train.rb', line 173

def close_pipes()
  @std_in[1].close()
  @std_out[0].close()
  @std_err[0].close()
end

#depart ⇒ Object 



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# File 'lib/baykit/bayserver/docker/cgi/cgi_train.rb', line 59

def depart

  begin

    ###############
    # Handle StdOut
    HttpUtil.parse_message_headers(@std_out[0], @tour.res.headers)

    if BayServer.harbor.trace_header
      @tour.res.headers.names.each do |name|
        @tour.res.headers.values(name).each do |value|
          BayLog.info("%s CGI: resHeader: %s=%s", @tour, name, value)
        end
      end
    end

    status = @tour.res.headers.get("Status")
    #BayLog.debug "Headers: #{@tours.res.headers.headers}"
    #BayLog.debug "Status: #{status}"
    if !StringUtil.empty?(status)
      pos = status.index(" ")
      if pos
        code = status[0, pos].to_i
      else
        code = status.to_i
      end
      @tour.res.headers.status = code
    end

    @tour.res.set_consume_listener do |len, resume|
      if resume
        @available = true
      end
    end

    @tour.res.send_headers(@tour_id)

    #BayLog.info("Reading STDOUT")
    while true
      buf = StringUtil.alloc(READ_CHUNK_SIZE)
      c = std_out[0].read(READ_CHUNK_SIZE, buf)
      if !c
        break
      end

      BayLog.trace("%s CGITrain: read stdout bytes: len=%d", @tour, buf.length)
      @available = @tour.res.send_content(@tour_id, buf, 0, buf.length)
      while !@available
        sleep(0.1)
      end
    end

    #BayLog.info("Reading STDERR")
    ###############
    # Handle StdErr
    ###############
    while true
      buf = StringUtil.alloc(READ_CHUNK_SIZE)
      c = std_err[0].read(READ_CHUNK_SIZE, buf)
      if !c
        break
      end

      BayLog.warn("%s CGITrain: read stderr bytes: %d", @tour, buf.length)
      BayLog.warn(buf)
    end

    @tour.res.end_content @tour_id

  rescue HttpException => e
    raise e
  rescue => e
    BayLog.error("%s CGITrain: Catch error: %s", @tour, e)
    BayLog.error_e(e)
    raise HttpException.new(HttpStatus::INTERNAL_SERVER_ERROR, "CGI error")
  ensure
    begin
      BayLog.debug("%s CGITrain: waiting process end", @tour)
      Process.wait(@pid)
      close_pipes()

      BayLog.debug("%s CGITrain: process ended", @tour)
    rescue => e
      BayLog.error_e(e)
    end
  end
end

#on_abort(tur) ⇒ Object 



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# File 'lib/baykit/bayserver/docker/cgi/cgi_train.rb', line 163

def on_abort(tur)
  BayLog.debug("%s CGITrain:abort", tur)
  close_pipes()

  BayLog.debug("%s KILL PROCESS!: %d", tur, @pid)
  Process.kill('KILL', @pid)

  return false  # not aborted immediately
end

#on_end_content(tur) ⇒ Object 



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# File 'lib/baykit/bayserver/docker/cgi/cgi_train.rb', line 155

def on_end_content(tur)
  BayLog.trace("%s CGITrain:endContent", tur)

  if !TrainRunner.post(self)
    raise HttpException.new(HttpStatus::SERVICE_UNAVAILABLE, "TrainRunner is busy")
  end
end

#on_read_content(tur, buf, start, len) ⇒ Object 



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# File 'lib/baykit/bayserver/docker/cgi/cgi_train.rb', line 147

def on_read_content(tur, buf, start, len)
  BayLog.info("%s CGITrain:onReadContent: len=%d", tur, len)

  wrote_len = @std_in[1].write(buf[start, len])
  BayLog.info("%s CGITrain:onReadContent: wrote=%d", tur, wrote_len)
  tur.req.consumed(Tour::TOUR_ID_NOCHECK, len)
end

#start_tour(env) ⇒ Object 



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

def start_tour(env)
  @env = env
  @available = false
  @lock = Mutex.new()

  @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])
  @std_in[0].close()
  @std_out[1].close()
  @std_err[1].close()
  BayLog.debug("#{@tour} PID: #{pid}")

  @tour.req.set_content_handler(self)

end