Class: Alphapoint::WebSocket

Inherits:
Object
  • Object
show all
Defined in:
lib/alphapoint/web_socket.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(address = nil, &block) ⇒ WebSocket

Returns a new instance of WebSocket.



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# File 'lib/alphapoint/web_socket.rb', line 9

def initialize(address = nil, &block)
	if (Alphapoint.configuration.nil? ||
		Alphapoint.configuration.address.nil? ||
		Alphapoint.configuration.address.empty?) &&
		address.nil?
		raise AlphapointError, "Pass or configure an address to conect on WebSocket"
	end

	@ws = nil
	@address = address || Alphapoint.configuration.address
	@nextIValue = 2
	@avaliable_functions = [
		"GetInstrument",
		"GetInstruments",
		"GetProduct",
		"GetProducts",
		"SendOrder",
		"SubscribeLevel1",
		"WebAuthenticateUser",
		"GetOrderFee"
	]
	@response = {}

	@unsub_actions = []

	alpha_self = self

	@thread = Thread.new do
				EM.run do
					@ws = Faye::WebSocket::Client.new(@address)
					@ws.on :open do |event|
						p [:open, "Websocket connected to #{@address}"]
					end

					@ws.on :message do |event|
						alpha_self.delegate_message(JSON.parse(event.data).with_indifferent_access)
					end

					@ws.on :error do |event|
							p [:error, event.inspect]
					end

					@ws.on :close do |event|
						p [:close, event.code, event.reason]
					end
				end
	end

	trap(:INT) { EM.stop }
	trap(:TERM){ EM.stop }

	while not EM.reactor_running?; end
	while not EM.defers_finished?; end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(m, *args, &block) ⇒ Object 



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# File 'lib/alphapoint/web_socket.rb', line 99

def method_missing(m, *args, &block)
	wait_handshake

	function_name = m.to_s.camelcase
	respond_action = @avaliable_functions.select{ |func| func ==  function_name }
	if respond_action.size > 0
		puts "Delegating to action: #{m}"

		payload = args[0] || {}
		type = args[1].to_i || 0

		build_request(function_name, payload, type) do |response|
			block.call(response)
		end
	else
		raise "Method #{m} not implemented yet"
	end
end

Instance Attribute Details

#address ⇒ Object

Returns the value of attribute address.



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# File 'lib/alphapoint/web_socket.rb', line 7

def address
  @address
end

Instance Method Details

#build_request(function_name, payload, type = 0, &block) ⇒ Object 



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# File 'lib/alphapoint/web_socket.rb', line 64

def build_request(function_name, payload,type = 0, &block)
	frame = {
	  'm': type,
	  'i': @nextIValue,
	  'n': function_name,
	  'o': JSON.generate(payload)
	}

	@response[@nextIValue] = block
	@nextIValue += 2
	@ws.send(JSON.generate(frame))
end

#delegate_message(data) ⇒ Object

Finds the action responsible for the received message



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# File 'lib/alphapoint/web_socket.rb', line 78

def delegate_message(data)
	received_action = @response[data['i']]

	if !received_action.nil? && received_action.is_a?(Proc)
		received_action.call(JSON.parse(data['o']))
		@response[data['i']] = nil
	else
		raise "Error: Received message has no correspondent id"
	end
end

#get_quotes(payload = { OMSId: 1 }, &block) ⇒ Object 



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# File 'lib/alphapoint/web_socket.rb', line 89

def get_quotes(payload = { OMSId: 1 }, &block)
	wait_handshake

	quotes = Alphapoint::GetQuotes.new(self)

	quotes.execute(payload) do |res|
		block.call(res)
	end
end