debian-mirror-gitlab/app/services/projects/batch_forks_count_service.rb
2020-08-09 17:44:08 +05:30

45 lines
1.6 KiB
Ruby

# frozen_string_literal: true
# Service class for getting and caching the number of forks of several projects
# Warning: do not user this service with a really large set of projects
# because the service use maps to retrieve the project ids
module Projects
class BatchForksCountService < Projects::BatchCountService
def refresh_cache_and_retrieve_data
count_services = @projects.map { |project| count_service.new(project) }
values = Gitlab::Instrumentation::RedisClusterValidator.allow_cross_slot_commands do
Rails.cache.fetch_multi(*(count_services.map { |ser| ser.cache_key } )) { |key| nil }
end
results_per_service = Hash[count_services.zip(values.values)]
projects_to_refresh = results_per_service.select { |_k, value| value.nil? }
projects_to_refresh = recreate_cache(projects_to_refresh)
results_per_service.update(projects_to_refresh)
results_per_service.transform_keys { |k| k.project }
end
# rubocop: disable CodeReuse/ActiveRecord
def global_count
@global_count ||= begin
count_service.query(project_ids)
.group(:forked_from_project_id)
.count
end
end
# rubocop: enable CodeReuse/ActiveRecord
def count_service
::Projects::ForksCountService
end
def recreate_cache(projects_to_refresh)
projects_to_refresh.each_with_object({}) do |(service, _v), hash|
count = global_count[service.project.id].to_i
service.refresh_cache { count }
hash[service] = count
end
end
end
end