Add latest changes from gitlab-org/gitlab@master

2 files changed, 80 insertions, 0 deletions

diff --git a/lib/gitlab/database/connection_timer.rb b/lib/gitlab/database/connection_timer.rb
new file mode 100644
index 00000000000..ef8d52ba71c
--- /dev/null
+++ b/lib/gitlab/database/connection_timer.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Database
+    class ConnectionTimer
+      DEFAULT_INTERVAL = 3600
+      RANDOMIZATION_INTERVAL = 600
+
+      class << self
+        def configure
+          yield self
+        end
+
+        def starting_now
+          # add a small amount of randomization to the interval, so reconnects don't all occur at once
+          new(interval_with_randomization, current_clock_value)
+        end
+
+        attr_writer :interval
+
+        def interval
+          @interval ||= DEFAULT_INTERVAL
+        end
+
+        def interval_with_randomization
+          interval + rand(RANDOMIZATION_INTERVAL) if interval.positive?
+        end
+
+        def current_clock_value
+          Concurrent.monotonic_time
+        end
+      end
+
+      attr_reader :interval, :starting_clock_value
+
+      def initialize(interval, starting_clock_value)
+        @interval = interval
+        @starting_clock_value = starting_clock_value
+      end
+
+      def expired?
+        interval&.positive? && self.class.current_clock_value > (starting_clock_value + interval)
+      end
+
+      def reset!
+        @starting_clock_value = self.class.current_clock_value
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/database/postgresql_adapter/force_disconnectable_mixin.rb b/lib/gitlab/database/postgresql_adapter/force_disconnectable_mixin.rb
new file mode 100644
index 00000000000..9f664fa2137
--- /dev/null
+++ b/lib/gitlab/database/postgresql_adapter/force_disconnectable_mixin.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Database
+    module PostgresqlAdapter
+      module ForceDisconnectableMixin
+        extend ActiveSupport::Concern
+
+        prepended do
+          set_callback :checkin, :after, :force_disconnect_if_old!
+        end
+
+        def force_disconnect_if_old!
+          if force_disconnect_timer.expired?
+            disconnect!
+            reset_force_disconnect_timer!
+          end
+        end
+
+        def reset_force_disconnect_timer!
+          force_disconnect_timer.reset!
+        end
+
+        def force_disconnect_timer
+          @force_disconnect_timer ||= ConnectionTimer.starting_now
+        end
+      end
+    end
+  end
+end