Add Async and Inline adapters

Just like their ActiveJob equivalents, these only work within the
current process.

2 files changed, 44 insertions, 0 deletions

diff --git a/actioncable/lib/action_cable/subscription_adapter/async.rb b/actioncable/lib/action_cable/subscription_adapter/async.rb
new file mode 100644
index 0000000000..85d4892e4c
--- /dev/null
+++ b/actioncable/lib/action_cable/subscription_adapter/async.rb
@@ -0,0 +1,22 @@
+require 'action_cable/subscription_adapter/inline'
+
+module ActionCable
+  module SubscriptionAdapter
+    class Async < Inline # :nodoc:
+      private
+        def subscriber_map
+          @subscriber_map ||= AsyncSubscriberMap.new
+        end
+
+        class AsyncSubscriberMap < SubscriberMap
+          def add_subscriber(*)
+            ::EM.next_tick { super }
+          end
+
+          def invoke_callback(*)
+            ::EM.next_tick { super }
+          end
+        end
+    end
+  end
+end
diff --git a/actioncable/lib/action_cable/subscription_adapter/inline.rb b/actioncable/lib/action_cable/subscription_adapter/inline.rb
new file mode 100644
index 0000000000..19747601be
--- /dev/null
+++ b/actioncable/lib/action_cable/subscription_adapter/inline.rb
@@ -0,0 +1,22 @@
+module ActionCable
+  module SubscriptionAdapter
+    class Inline < Base # :nodoc:
+      def broadcast(channel, payload)
+        subscriber_map.broadcast(channel, payload)
+      end
+
+      def subscribe(channel, callback, success_callback = nil)
+        subscriber_map.add_subscriber(channel, callback, success_callback)
+      end
+
+      def unsubscribe(channel, callback)
+        subscriber_map.remove_subscriber(channel, callback)
+      end
+
+      private
+        def subscriber_map
+          @subscriber_map ||= SubscriberMap.new
+        end
+    end
+  end
+end