Move the cleanup policies cache object

It's not really a service so it's better placed in the "lib" folder

app/services/projects/container_repository/cache_tags_created_at_service.rb

-# frozen_string_literal: true
-
-module Projects
-  module ContainerRepository
-    class CacheTagsCreatedAtService
-      def initialize(container_repository)
-        @container_repository = container_repository
-        @cached_tag_names = Set.new
-      end
-
-      def populate(tags)
-        return if tags.empty?
-
-        # This will load all tags in one Redis roundtrip
-        # the maximum number of tags is configurable and is set to 200 by default.
-        # https://gitlab.com/gitlab-org/gitlab/blob/master/doc/user/packages/container_registry/index.md#set-cleanup-limits-to-conserve-resources
-        keys = tags.map(&method(:cache_key))
-        cached_tags_count = 0
-
-        ::Gitlab::Redis::Cache.with do |redis|
-          tags.zip(redis.mget(keys)).each do |tag, created_at|
-            next unless created_at
-
-            tag.created_at = DateTime.rfc3339(created_at)
-            @cached_tag_names << tag.name
-            cached_tags_count += 1
-          end
-        end
-
-        cached_tags_count
-      end
-
-      def insert(tags, max_ttl_in_seconds)
-        return unless max_ttl_in_seconds
-        return if tags.empty?
-
-        # tags with nil created_at are not cacheable
-        # tags already cached don't need to be cached again
-        cacheable_tags = tags.select do |tag|
-          tag.created_at.present? && !tag.name.in?(@cached_tag_names)
-        end
-
-        return if cacheable_tags.empty?
-
-        now = Time.zone.now
-
-        ::Gitlab::Redis::Cache.with do |redis|
-          # we use a pipeline instead of a MSET because each tag has
-          # a specific ttl
-          redis.pipelined do
-            cacheable_tags.each do |tag|
-              created_at = tag.created_at
-              # ttl is the max_ttl_in_seconds reduced by the number
-              # of seconds that the tag has already existed
-              ttl = max_ttl_in_seconds - (now - created_at).seconds
-              ttl = ttl.to_i
-              redis.set(cache_key(tag), created_at.rfc3339, ex: ttl) if ttl > 0
-            end
-          end
-        end
-      end
-
-      private
-
-      def cache_key(tag)
-        "container_repository:{#{@container_repository.id}}:tag:#{tag.name}:created_at"
-      end
-    end
-  end
-end

app/services/projects/container_repository/cleanup_tags_service.rb

@@ -140,7 +140,7 @@ module Projects
 
       def cache
         strong_memoize(:cache) do
-          ::Projects::ContainerRepository::CacheTagsCreatedAtService.new(@container_repository)
+          ::Gitlab::ContainerRepository::Tags::Cache.new(@container_repository)
         end
       end
 

lib/gitlab/container_repository/tags/cache.rb

+# frozen_string_literal: true
+
+module Gitlab
+  module ContainerRepository
+    module Tags
+      class Cache
+        def initialize(container_repository)
+          @container_repository = container_repository
+          @cached_tag_names = Set.new
+        end
+
+        def populate(tags)
+          return if tags.empty?
+
+          # This will load all tags in one Redis roundtrip
+          # the maximum number of tags is configurable and is set to 200 by default.
+          # https://gitlab.com/gitlab-org/gitlab/blob/master/doc/user/packages/container_registry/index.md#set-cleanup-limits-to-conserve-resources
+          keys = tags.map(&method(:cache_key))
+          cached_tags_count = 0
+
+          ::Gitlab::Redis::Cache.with do |redis|
+            tags.zip(redis.mget(keys)).each do |tag, created_at|
+              next unless created_at
+
+              tag.created_at = DateTime.rfc3339(created_at)
+              @cached_tag_names << tag.name
+              cached_tags_count += 1
+            end
+          end
+
+          cached_tags_count
+        end
+
+        def insert(tags, max_ttl_in_seconds)
+          return unless max_ttl_in_seconds
+          return if tags.empty?
+
+          # tags with nil created_at are not cacheable
+          # tags already cached don't need to be cached again
+          cacheable_tags = tags.select do |tag|
+            tag.created_at.present? && !tag.name.in?(@cached_tag_names)
+          end
+
+          return if cacheable_tags.empty?
+
+          now = Time.zone.now
+
+          ::Gitlab::Redis::Cache.with do |redis|
+            # we use a pipeline instead of a MSET because each tag has
+            # a specific ttl
+            redis.pipelined do
+              cacheable_tags.each do |tag|
+                created_at = tag.created_at
+                # ttl is the max_ttl_in_seconds reduced by the number
+                # of seconds that the tag has already existed
+                ttl = max_ttl_in_seconds - (now - created_at).seconds
+                ttl = ttl.to_i
+                redis.set(cache_key(tag), created_at.rfc3339, ex: ttl) if ttl > 0
+              end
+            end
+          end
+        end
+
+        private
+
+        def cache_key(tag)
+          "container_repository:{#{@container_repository.id}}:tag:#{tag.name}:created_at"
+        end
+      end
+    end
+  end
+end

spec/services/projects/container_repository/cache_tags_created_at_service_spec.rb → spec/lib/gitlab/container_repository/tags/cache_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe ::Projects::ContainerRepository::CacheTagsCreatedAtService, :clean_gitlab_redis_cache do
+RSpec.describe ::Gitlab::ContainerRepository::Tags::Cache, :clean_gitlab_redis_cache do
   let_it_be(:dummy_tag_class) { Struct.new(:name, :created_at) }
   let_it_be(:repository) { create(:container_repository) }