1 files changed, 19 insertions, 0 deletions
diff --git a/lib/gitlab/optimistic_locking.rb b/lib/gitlab/optimistic_locking.rb
new file mode 100644
index 00000000000..879d46446b3
--- /dev/null
+++ b/lib/gitlab/optimistic_locking.rb
@@ -0,0 +1,19 @@
+module Gitlab
+  module OptimisticLocking
+    extend self
+
+    def retry_lock(subject, retries = 100, &block)
+      loop do
+        begin
+          ActiveRecord::Base.transaction do
+            return block.call(subject)
+          end
+        rescue ActiveRecord::StaleObjectError
+          retries -= 1
+          raise unless retries >= 0
+          subject.reload
+        end
+      end
+    end
+  end
+end