Class: Relp::RelpProtocol

Inherits:
Object
  • Object
show all
Defined in:
lib/relp/relp_protocol.rb

Direct Known Subclasses

RelpServer

Constant Summary collapse

@@relp_version = 
'0'
@@relp_software =

TODO: check whether this exact line is needed or if we can put in something custom to help debugging

'librelp,1.2.13,http://librelp.adiscon.com'

Instance Method Summary collapse

Instance Method Details

#create_frame(txnr, command, message) ⇒ Object 



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# File 'lib/relp/relp_protocol.rb', line 12

def create_frame(txnr, command, message)
  frame = {:txnr => txnr,
           :command => command,
           :message => message
  }
end

#frame_read(socket) ⇒ Object

Read socket and return Relp frame information in hash



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# File 'lib/relp/relp_protocol.rb', line 33

def frame_read(socket)
  begin
    socket_content = socket.read_nonblock(4096)
    frame = Hash.new
    if match = socket_content.match(/(^[0-9]+) ([\S]*) (\d+)([\s\S]*)/)
      frame[:txnr], frame[:command], frame[:data_length], frame[:message] = match.captures
      # check_message_length(frame) - currently unstable, needs some more work
      frame[:message].lstrip! #message could be empty
    else
      raise Relp::FrameReadException.new('Problem with reading RELP frame')
    end
    @logger.debug "Reading Frame #{frame.inspect}"
  rescue IOError
    @logger.error 'Problem with reading RELP frame'
    raise Relp::FrameReadException.new 'Problem with reading RELP frame'
  rescue Errno::ECONNRESET
    @logger.error 'Connection reset'
    raise Relp::ConnectionClosed.new 'Connection closed'
  end
  is_valid_command(frame[:command])

  return frame
end

#frame_write(socket, frame) ⇒ Object 



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# File 'lib/relp/relp_protocol.rb', line 19

def frame_write(socket, frame)
  raw_data=[
      frame[:txnr],
      frame[:command],
      frame[:message]
  ].join(' ')
  @logger.debug "Writing Frame #{frame.inspect}"
  begin
    socket.write(raw_data)
  rescue Errno::EPIPE,IOError,Errno::ECONNRESET
    raise Relp::ConnectionClosed
  end
end