Include the clearing of database connections configuration by default

2 files changed, 24 insertions, 0 deletions

diff --git a/lib/action_cable/server.rb b/lib/action_cable/server.rb
index e7cc70b68d..919ebd94de 100644
--- a/lib/action_cable/server.rb
+++ b/lib/action_cable/server.rb
@@ -4,6 +4,8 @@ module ActionCable
     autoload :Broadcasting, 'action_cable/server/broadcasting'
     autoload :Connections, 'action_cable/server/connections'
     autoload :Configuration, 'action_cable/server/configuration'
+
     autoload :Worker, 'action_cable/server/worker'
+    autoload :ClearDatabaseConnections, 'action_cable/server/worker/clear_database_connections'
   end
 end
diff --git a/lib/action_cable/server/worker/clear_database_connections.rb b/lib/action_cable/server/worker/clear_database_connections.rb
new file mode 100644
index 0000000000..722d363a41
--- /dev/null
+++ b/lib/action_cable/server/worker/clear_database_connections.rb
@@ -0,0 +1,22 @@
+module ActionCable
+  module Server
+    class Worker
+      # Clear active connections between units of work so the long-running channel or connection processes do not hoard connections.
+      module ClearDatabaseConnections
+        extend ActiveSupport::Concern
+
+        included do
+          if defined?(ActiveRecord::Base)
+            set_callback :work, :around, :with_database_connections
+          end
+        end
+
+        def with_database_connections
+          yield
+        ensure
+          ActiveRecord::Base.clear_active_connections!
+        end
+      end
+    end
+  end
+end
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