Add latest changes from gitlab-org/gitlab@master

1 files changed, 40 insertions, 0 deletions

diff --git a/lib/gitlab/repository_cache/preloader.rb b/lib/gitlab/repository_cache/preloader.rb
new file mode 100644
index 00000000000..726dde4e0ca
--- /dev/null
+++ b/lib/gitlab/repository_cache/preloader.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+module Gitlab
+  class RepositoryCache
+    class Preloader
+      def initialize(repositories)
+        @repositories = repositories
+      end
+
+      def preload(methods)
+        return if @repositories.empty?
+
+        cache_keys = []
+
+        sources_by_cache_key = @repositories.each_with_object({}) do |repository, hash|
+          methods.each do |method|
+            cache_key = repository.cache.cache_key(method)
+
+            hash[cache_key] = { repository: repository, method: method }
+            cache_keys << cache_key
+          end
+        end
+
+        Gitlab::Instrumentation::RedisClusterValidator.allow_cross_slot_commands do
+          backend.read_multi(*cache_keys).each do |cache_key, value|
+            source = sources_by_cache_key[cache_key]
+
+            source[:repository].memoize_method_cache_value(source[:method], value)
+          end
+        end
+      end
+
+      private
+
+      def backend
+        @repositories.first.cache.backend
+      end
+    end
+  end
+end