1 files changed, 34 insertions, 0 deletions
diff --git a/actioncable/lib/action_cable/server/connections.rb b/actioncable/lib/action_cable/server/connections.rb
new file mode 100644
index 0000000000..4dc8934b25
--- /dev/null
+++ b/actioncable/lib/action_cable/server/connections.rb
@@ -0,0 +1,34 @@
+module ActionCable
+  module Server
+    # Collection class for all the connections that have been established on this specific server. Remember, usually you'll run many Action Cable servers, so
+    # you can't use this collection as a full list of all of the connections established against your application. Instead, use RemoteConnections for that.
+    module Connections # :nodoc:
+      BEAT_INTERVAL = 3
+
+      def connections
+        @connections ||= []
+      end
+
+      def add_connection(connection)
+        connections << connection
+      end
+
+      def remove_connection(connection)
+        connections.delete connection
+      end
+
+      # WebSocket connection implementations differ on when they'll mark a connection as stale. We basically never want a connection to go stale, as you
+      # then can't rely on being able to communicate with the connection. To solve this, a 3 second heartbeat runs on all connections. If the beat fails, we automatically
+      # disconnect.
+      def setup_heartbeat_timer
+        @heartbeat_timer ||= Concurrent::TimerTask.new(execution_interval: BEAT_INTERVAL) do
+          Concurrent.global_io_executor.post { connections.map(&:beat) }
+        end.tap(&:execute)
+      end
+
+      def open_connections_statistics
+        connections.map(&:statistics)
+      end
+    end
+  end
+end