From 354018bf9b5f5bf0fbbc6e6efddc719e7523b39d Mon Sep 17 00:00:00 2001
From: Pratik Naik <pratiknaik@gmail.com>
Date: Sat, 4 Apr 2015 00:26:14 -0500
Subject: Separate connection and server classes

---
 lib/action_cable/server.rb | 154 +++------------------------------------------
 1 file changed, 10 insertions(+), 144 deletions(-)

(limited to 'lib/action_cable/server.rb')

diff --git a/lib/action_cable/server.rb b/lib/action_cable/server.rb
index ebf98171c1..6e9265dc06 100644
--- a/lib/action_cable/server.rb
+++ b/lib/action_cable/server.rb
@@ -1,157 +1,23 @@
 module ActionCable
   class Server
-    class_attribute :registered_channels
-    self.registered_channels = Set.new
-
-    class_attribute :worker_pool_size
-    self.worker_pool_size = 100
-
     cattr_accessor(:logger, instance_reader: true) { Rails.logger }
 
-    PING_INTERVAL = 3
-
-    class << self
-      def register_channels(*channel_classes)
-        self.registered_channels += channel_classes
-      end
-
-      def call(env)
-        new(env).process
-      end
-
-      def worker_pool
-        @worker_pool ||= ActionCable::Worker.pool(size: worker_pool_size)
-      end
-    end
-
-    attr_reader :env
-
-    def initialize(env)
-      @env = env
-      @accept_messages = false
-      @pending_messages = []
-    end
-
-    def process
-      if Faye::WebSocket.websocket?(@env)
-        @subscriptions = {}
-
-        @websocket = Faye::WebSocket.new(@env)
-
-        @websocket.on(:open) do |event|
-          broadcast_ping_timestamp
-          @ping_timer = EventMachine.add_periodic_timer(PING_INTERVAL) { broadcast_ping_timestamp }
-          worker_pool.async.invoke(self, :initialize_client)
-        end
-
-        @websocket.on(:message) do |event|
-          message = event.data
-
-          if message.is_a?(String)
-            if @accept_messages
-              worker_pool.async.invoke(self, :received_data, message)
-            else
-              @pending_messages << message
-            end
-          end
-        end
+    attr_accessor :registered_channels, :worker_pool
 
-        @websocket.on(:close) do |event|
-          worker_pool.async.invoke(self, :cleanup_subscriptions)
-          worker_pool.async.invoke(self, :disconnect) if respond_to?(:disconnect)
-
-          EventMachine.cancel_timer(@ping_timer) if @ping_timer
-        end
-
-        @websocket.rack_response
-      else
-        invalid_request
-      end
+    def initialize(redis_config:, channels:, worker_pool_size: 100, connection: Connection)
+      @redis_config = redis_config
+      @registered_channels = Set.new(channels)
+      @worker_pool = ActionCable::Worker.pool(size: worker_pool_size)
+      @connection_class = connection
     end
 
-    def received_data(data)
-      return unless websocket_alive?
-
-      data = ActiveSupport::JSON.decode data
-
-      case data['action']
-      when 'subscribe'
-        subscribe_channel(data)
-      when 'unsubscribe'
-        unsubscribe_channel(data)
-      when 'message'
-        process_message(data)
-      end
+    def call(env)
+      @connection_class.new(self, env).process
     end
 
-    def cleanup_subscriptions
-      @subscriptions.each do |id, channel|
-        channel.unsubscribe
-      end
+    def pubsub
+      @pubsub ||= EM::Hiredis.connect(@redis_config['url']).pubsub
     end
 
-    def broadcast(data)
-      logger.info "Sending data: #{data}"
-      @websocket.send data
-    end
-
-    def worker_pool
-      self.class.worker_pool
-    end
-
-    def handle_exception
-      logger.error "[ActionCable] Closing connection"
-
-      @websocket.close
-    end
-
-    private
-      def initialize_client
-        connect if respond_to?(:connect)
-        @accept_messages = true
-
-        worker_pool.async.invoke(self, :received_data, @pending_messages.shift) until @pending_messages.empty?
-      end
-
-      def broadcast_ping_timestamp
-        broadcast({ identifier: '_ping', message: Time.now.to_i }.to_json)
-      end
-
-      def subscribe_channel(data)
-        id_key = data['identifier']
-        id_options = ActiveSupport::JSON.decode(id_key).with_indifferent_access
-
-        subscription_klass = registered_channels.detect { |channel_klass| channel_klass.find_name == id_options[:channel] }
-
-        if subscription_klass
-          logger.info "Subscribing to channel: #{id_key}"
-          @subscriptions[id_key] = subscription_klass.new(self, id_key, id_options)
-        else
-          logger.error "Unable to subscribe to channel: #{id_key}"
-        end
-      end
-
-      def process_message(message)
-        if @subscriptions[message['identifier']]
-          @subscriptions[message['identifier']].receive_data(ActiveSupport::JSON.decode message['data'])
-        else
-          logger.error "Unable to process message: #{message}"
-        end
-      end
-
-      def unsubscribe_channel(data)
-        logger.info "Unsubscribing from channel: #{data['identifier']}"
-        @subscriptions[data['identifier']].unsubscribe
-        @subscriptions.delete(data['identifier'])
-      end
-
-      def invalid_request
-        [404, {'Content-Type' => 'text/plain'}, ['Page not found']]
-      end
-
-      def websocket_alive?
-        @websocket && @websocket.ready_state == Faye::WebSocket::API::OPEN
-      end
-
   end
 end
-- 
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