Class: RBus::Message::Writer

Inherits:
Object
  • Object
show all
Defined in:
lib/rbus/message/writer.rb

Overview

Writes messages to the Bus via a Transport

Instance Method Summary collapse

Constructor Details

#initialize(transport) ⇒ Writer

Returns a new instance of Writer.



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# File 'lib/rbus/message/writer.rb', line 29

def initialize(transport)
  @transport = transport
end

Instance Method Details

#send_message(message) ⇒ Object

Marshal and write message



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# File 'lib/rbus/message/writer.rb', line 34

def send_message(message)

  # The marshaling always uses native encoding, so
  # let's find it.
  endian = ([1].pack('I') == "\1\0\0\0") ? ?l : ?B
  
  body = ''
  args = message.arguments

  # Got arguments for the body? Marshal.
  unless args.nil? || args.empty?
    args.extend(MarshalMixin)
    body = args.dbus_marshal(message.signature)
  end
  
  hf = message.header_fields
  
  # Put together the header
  h_array = [endian, message.type, message.flags] + 
            [VERSION::PROTOCOL, body.length, message.serial, hf]
  
  # Marshal
  h_array.extend(MarshalMixin)        
  header = h_array.dbus_marshal('yyyyuua(yv)')
  
  # Pad
  header += "\0" * (-header.length & 7)
  
  Log.debug(header + body)

  # Send
  @transport.send(header + body)
end