Class: RubyPitaya::NatsConnector

Inherits:
Object
  • Object
show all
Defined in:
lib/rubypitaya/core/nats_connector.rb

Constant Summary collapse

REQUEST_TYPE_SYS = 
0
REQUEST_TYPE_USER = 
1
MESSAGE_TYPE_REQUEST = 
0
MESSAGE_TYPE_NOTIFY = 
1
MESSAGE_TYPE_RESPONSE = 
2
MESSAGE_TYPE_PUSH = 
3

Instance Method Summary collapse

Constructor Details

#initialize(nats_address, server_uuid, server_name) ⇒ NatsConnector

Returns a new instance of NatsConnector.



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# File 'lib/rubypitaya/core/nats_connector.rb', line 18

def initialize(nats_address, server_uuid, server_name)
  @server_uuid = server_uuid
  @server_name = server_name
  @nats_address = nats_address
  @nats = nil
  @subscribe = nil
end

Instance Method Details

#connect ⇒ Object 



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# File 'lib/rubypitaya/core/nats_connector.rb', line 26

def connect
  self.disconnect

  @nats = NATS.connect(servers: [@nats_address])
  @subscribe = @nats.subscribe(subscribe_topic)

  loop do
    message = @subscribe.pending_queue.pop
    @subscribe.synchronize do
      @subscribe.pending_size -= message.data.size
    end

    request = NatsRequest.decode(message.data).to_h

    response = yield request

    nats_response = NatsResponse.new(data: response.to_json)
    response = NatsResponse.encode(nats_response)

    @nats.publish(message.reply, response)
  end
end

#disconnect ⇒ Object 



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# File 'lib/rubypitaya/core/nats_connector.rb', line 49

def disconnect
  @subscribe.unsubscribe unless @subscribe.nil?
  @nats.close unless @nats.nil?

  @nats = nil
  @subscribe = nil
end

#get_frontend_topic(frontend_id) ⇒ Object 



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# File 'lib/rubypitaya/core/nats_connector.rb', line 108

def get_frontend_topic(frontend_id)
  "pitaya/servers/connector/#{frontend_id}"
end

#get_user_message_topic(uid) ⇒ Object 



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# File 'lib/rubypitaya/core/nats_connector.rb', line 112

def get_user_message_topic(uid)
  "pitaya/connector/user/#{uid}/push"
end

#push_to_frontend(session, message_route, payload) ⇒ Object 



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# File 'lib/rubypitaya/core/nats_connector.rb', line 57

def push_to_frontend(session, message_route, payload)
  frontend_topic = get_frontend_topic(session.frontend_id)

  nats_message = NatsMessage.new(
    route: message_route,
    data: payload,
    reply: @server_uuid,
    type: MESSAGE_TYPE_REQUEST,
  )

  nats_session = NatsSession.new(
    id: session.id,
    uid: session.uid,
    data: session.data.to_json,
  )

  nats_request = NatsRequest.new(
    type: REQUEST_TYPE_USER,
    session: nats_session,
    msg: nats_message,
    frontendID: session.frontend_id,
    metadata: session.metadata.to_json,
  )

  request = NatsRequest.encode(nats_request)

  nats_response = @nats.request(frontend_topic, request)

  response = NatsResponse.decode(nats_response.data).to_h

  response
end

#push_to_user(uid, message_route, payload) ⇒ Object 



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# File 'lib/rubypitaya/core/nats_connector.rb', line 90

def push_to_user(uid, message_route, payload)
  user_topic = get_user_message_topic(uid)

  nats_push = NatsPush.new(
    route: message_route,
    uid: uid,
    data: payload.to_json,
  )

  @nats.publish(user_topic, nats_push)

  0
end

#subscribe_topic ⇒ Object 



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# File 'lib/rubypitaya/core/nats_connector.rb', line 104

def subscribe_topic
  "pitaya/servers/#{@server_name}/#{@server_uuid}"
end