Class: A4Tools::WebSocketTransporter

Inherits:
Transporter show all
Defined in:
lib/acres_client.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from EventGenerator

#on, #passthrough, #signal

Constructor Details

#initialize(uri) ⇒ WebSocketTransporter

Returns a new instance of WebSocketTransporter.



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# File 'lib/acres_client.rb', line 85

def initialize(uri)
  super()
  @uri = uri
  @queue = []
  @ready = false
  @mutex = Mutex.new
  @condition = ConditionVariable.new
end

Instance Attribute Details

#ready ⇒ Object (readonly)

Returns the value of attribute ready.



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# File 'lib/acres_client.rb', line 83

def ready
  @ready
end

Instance Method Details

#connect(timeout = 5) ⇒ Object 



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# File 'lib/acres_client.rb', line 94

def connect(timeout=5)
  return true if @ready
  start_socket
  @mutex.synchronize { @condition.wait(@mutex, timeout) }
  @ready
end

#disconnect ⇒ Object 



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# File 'lib/acres_client.rb', line 101

def disconnect
  @client.kill unless @client.nil?
  @client = nil
  @ws = nil
  true
end

#empty_queue ⇒ Object 



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# File 'lib/acres_client.rb', line 140

def empty_queue
  @queue.each { |msg| send_message(msg) }
  @queue = []
end

#send_message(msg) ⇒ Object 



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# File 'lib/acres_client.rb', line 145

def send_message(msg)
  unless @ready then
    @queue.push msg
    return
  end

  signal(:sent, msg)
  @ws.send(msg)
end

#start_socket ⇒ Object 



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# File 'lib/acres_client.rb', line 108

def start_socket
  @client = Thread.new do
    EM.run do
      @ws = Faye::WebSocket::Client.new(@uri.to_s)

      @ws.on :open do |event|
        @mutex.synchronize do
          @ready = true
          @condition.signal
        end
        
        signal(:connect)
        empty_queue
      end

      @ws.on :error do |event|
        @mutex.synchronize { @condition.signal }
      end

      @ws.on :message do |event|
        signal(:message, event.data)
      end

      @ws.on :close do |event|
        @ready = false
        @ws = nil
        signal(:disconnect)
      end
    end
  end
end