Class: JanusGateway::Transport::WebSocket

Inherits:
JanusGateway::Transport show all
Defined in:
lib/janus_gateway/transport/websocket.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from JanusGateway::Transport

#transaction_id_new

Constructor Details

#initialize(url, protocol = 'janus-protocol') ⇒ WebSocket

Returns a new instance of WebSocket.

Parameters:

  • url (String)
  • protocol (String) (defaults to: 'janus-protocol') 


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# File 'lib/janus_gateway/transport/websocket.rb', line 10

def initialize(url, protocol = 'janus-protocol')
  @url = url
  @protocol = protocol
  @client = nil
  @transaction_queue = {}
end

Instance Attribute Details

#client ⇒ Faye::WebSocket::Client, NilClass (readonly)

Returns:

  • (Faye::WebSocket::Client, NilClass) 


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# File 'lib/janus_gateway/transport/websocket.rb', line 110

def client
  @client
end

#transaction_queue ⇒ Object (readonly)

Returns the value of attribute transaction_queue.



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# File 'lib/janus_gateway/transport/websocket.rb', line 6

def transaction_queue
  @transaction_queue
end

Instance Method Details

#connect ⇒ Object 



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# File 'lib/janus_gateway/transport/websocket.rb', line 24

def connect
  raise('WebSocket client already exists!') unless @client.nil?

  @client = _create_client(@url, @protocol)

  client.on :open do
    emit :open
  end

  client.on :message do |event|
    data = JSON.parse(event.data)

    transaction_list = @transaction_queue.clone

    transaction_id = data['transaction']
    unless transaction_id.nil?
      promise = transaction_list[transaction_id]
      unless promise.nil?
        if %w(success ack).include?(data['janus'])
          promise.set(data).execute
        else
          error_data = data['error']
          error = JanusGateway::Error.new(error_data['code'], error_data['reason'])
          promise.fail(error).execute
        end
      end
    end

    emit :message, data
  end

  client.on :close do
    emit :close

    @transaction_queue.each do |transaction_id, promise|
      error = JanusGateway::Error.new(0, "Transaction id `#{transaction_id}` has failed due to websocket `close`!")
      promise.fail(error).execute
    end
  end
end

#connected? ⇒ TrueClass, FalseClass

Returns:

  • (TrueClass, FalseClass) 


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# File 'lib/janus_gateway/transport/websocket.rb', line 105

def connected?
  !client.nil? && (client.ready_state == Faye::WebSocket::API::OPEN)
end

#disconnect ⇒ Object 



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# File 'lib/janus_gateway/transport/websocket.rb', line 100

def disconnect
  client.close unless client.nil?
end

#run ⇒ Object 



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# File 'lib/janus_gateway/transport/websocket.rb', line 17

def run
  EventMachine.run do
    EM.error_handler { |e| raise(e) }
    connect
  end
end

#send(data) ⇒ Object

Parameters:

  • data (Hash) 


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# File 'lib/janus_gateway/transport/websocket.rb', line 66

def send(data)
  raise 'WebSocket transport not connected' unless connected?
  client.send(JSON.generate(data))
end

#send_transaction(data) ⇒ Concurrent::Promise

Parameters:

  • data (Hash)

Returns:

  • (Concurrent::Promise) 


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# File 'lib/janus_gateway/transport/websocket.rb', line 73

def send_transaction(data)
  promise = Concurrent::Promise.new
  transaction = transaction_id_new

  data[:transaction] = transaction
  send(data)

  @transaction_queue[transaction] = promise

  thread = Thread.new do
    sleep(_transaction_timeout)
    error = JanusGateway::Error.new(0, "Transaction id `#{transaction}` has failed due to `timeout`!")
    promise.fail(error).execute
  end

  promise.then do
    @transaction_queue.delete(transaction)
    thread.exit
  end
  promise.rescue do
    @transaction_queue.delete(transaction)
    thread.exit
  end

  promise
end