1 files changed, 32 insertions, 0 deletions
diff --git a/lib/action_cable/channel/callbacks.rb b/lib/action_cable/channel/callbacks.rb
new file mode 100644
index 0000000000..cf0246a386
--- /dev/null
+++ b/lib/action_cable/channel/callbacks.rb
@@ -0,0 +1,32 @@
+module ActionCable
+  module Channel
+
+    module Callbacks
+      extend ActiveSupport::Concern
+
+      included do
+        class_attribute :on_subscribe_callbacks, :on_unsubscribe_callbacks, :periodic_timers, :instance_reader => false
+
+        self.on_subscribe_callbacks = []
+        self.on_unsubscribe_callbacks = []
+        self.periodic_timers = []
+      end
+
+      module ClassMethods
+        def on_subscribe(*methods)
+          self.on_subscribe_callbacks += methods
+        end
+
+        def on_unsubscribe(*methods)
+          self.on_unsubscribe_callbacks += methods
+        end
+
+        def periodic_timer(method, every:)
+          self.periodic_timers += [ [ method, every: every ] ]
+        end
+      end
+
+    end
+
+  end
+end
+\ No newline at end of file