module Projects # Base class for the various service classes that count project data (e.g. # issues or forks). class CountService def initialize(project) @project = project end def relation_for_count raise( NotImplementedError, '"relation_for_count" must be implemented and return an ActiveRecord::Relation' ) end def count Rails.cache.fetch(cache_key) { uncached_count } end def refresh_cache Rails.cache.write(cache_key, uncached_count) end def uncached_count relation_for_count.count end def delete_cache Rails.cache.delete(cache_key) end def cache_key_name raise( NotImplementedError, '"cache_key_name" must be implemented and return a String' ) end def cache_key ['projects', @project.id, cache_key_name] end end end