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# frozen_string_literal: true
# Worker for updating any project specific caches.
class ProjectCacheWorker
include ApplicationWorker
LEASE_TIMEOUT = 15.minutes.to_i
# project_id - The ID of the project for which to flush the cache.
# files - An Array containing extra types of files to refresh such as
# `:readme` to flush the README and `:changelog` to flush the
# CHANGELOG.
# statistics - An Array containing columns from ProjectStatistics to
# refresh, if empty all columns will be refreshed
# rubocop: disable CodeReuse/ActiveRecord
def perform(project_id, files = [], statistics = [])
project = Project.find_by(id: project_id)
return unless project && project.repository.exists?
update_statistics(project, statistics)
project.repository.refresh_method_caches(files.map(&:to_sym))
project.cleanup
end
# rubocop: enable CodeReuse/ActiveRecord
# NOTE: triggering both an immediate update and one in 15 minutes if we
# successfully obtain the lease. That way, we only need to wait for the
# statistics to become accurate if they were already updated once in the
# last 15 minutes.
def update_statistics(project, statistics = [])
return if Gitlab::Database.read_only?
return unless try_obtain_lease_for(project.id, statistics)
Projects::UpdateStatisticsService.new(project, nil, statistics: statistics).execute
UpdateProjectStatisticsWorker.perform_in(LEASE_TIMEOUT, project.id, statistics)
end
private
def try_obtain_lease_for(project_id, statistics)
Gitlab::ExclusiveLease
.new(project_cache_worker_key(project_id, statistics), timeout: LEASE_TIMEOUT)
.try_obtain
end
def project_cache_worker_key(project_id, statistics)
["project_cache_worker", project_id, *statistics.sort].join(":")
end
end
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