Module: Fraggle::Connection

Defined in:
lib/fraggle/connection.rb

Defined Under Namespace

Classes: DisconnectedError, ResponseError, SendError

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#addr ⇒ Object (readonly)

Returns the value of attribute addr.



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# File 'lib/fraggle/connection.rb', line 39

def addr
  @addr
end

Instance Method Details

#err? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fraggle/connection.rb', line 110

def err?
  !!@err
end

#initialize(addr) ⇒ Object 



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# File 'lib/fraggle/connection.rb', line 41

def initialize(addr)
  @addr, @cb = addr, {}
end

#next_tick(&blk) ⇒ Object 



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# File 'lib/fraggle/connection.rb', line 118

def next_tick(&blk)
  EM.next_tick(&blk)
end

#receive_data(data) ⇒ Object 



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# File 'lib/fraggle/connection.rb', line 45

def receive_data(data)
  (@buf ||= "") << data

  while @buf.length > 0
    if @len && @buf.length >= @len
      bytes = @buf.slice!(0, @len)
      @len = nil
      res = Response.decode(bytes)
      receive_response(res)
    elsif @buf.length >= 4
      bytes = @buf.slice!(0, 4)
      @len = bytes.unpack("N")[0]
    else
      break
    end
  end
end

#receive_response(res) ⇒ Object

The default receive_response



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# File 'lib/fraggle/connection.rb', line 64

def receive_response(res)
  return if err?
  req, blk = @cb.delete(res.tag)
  return if ! blk
  if res.err_code
    blk.call(nil, ResponseError.new(res))
  else
    blk.call(res, nil)
  end
end

#send_request(req, blk) ⇒ Object 



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# File 'lib/fraggle/connection.rb', line 75

def send_request(req, blk)
  if req.tag
    raise SendError, "Already sent #{req.inspect}"
  end

  if err?
    next_tick { blk.call(nil, DisconnectedError.new(self.addr)) }
    return req
  end

  req.tag = 0
  while @cb.has_key?(req.tag)
    req.tag += 1

    req.tag %= 2**31
  end

  # TODO: remove this!
  @cb[req.tag] = [req, blk]

  data = req.encode
  head = [data.length].pack("N")

  send_data("#{head}#{data}")

  req
end

#timer(n, &blk) ⇒ Object 



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# File 'lib/fraggle/connection.rb', line 114

def timer(n, &blk)
  EM.add_timer(n, &blk)
end

#unbind ⇒ Object 



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# File 'lib/fraggle/connection.rb', line 103

def unbind
  @err = true
  @cb.values.each do |_, blk|
    blk.call(nil, DisconnectedError.new(self.addr))
  end
end