81 lines
1.9 KiB
Ruby
81 lines
1.9 KiB
Ruby
# frozen_string_literal: true
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module CacheableAttributes
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extend ActiveSupport::Concern
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included do
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after_commit { self.class.expire }
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end
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class_methods do
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def cache_key
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"#{name}:#{Gitlab::VERSION}:#{Rails.version}".freeze
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end
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# Can be overridden
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def current_without_cache
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last
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end
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# Can be overridden
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def defaults
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{}
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end
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def build_from_defaults(attributes = {})
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final_attributes = defaults
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.merge(attributes)
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.stringify_keys
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.slice(*column_names)
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new(final_attributes)
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end
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def cached
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Gitlab::SafeRequestStore[:"#{name}_cached_attributes"] ||= retrieve_from_cache
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end
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def retrieve_from_cache
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record = cache_backend.read(cache_key)
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ensure_cache_setup if record.present?
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record
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end
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def current
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cached_record = cached
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return cached_record if cached_record.present?
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current_without_cache.tap { |current_record| current_record&.cache! }
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rescue => e
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if Rails.env.production?
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Rails.logger.warn("Cached record for #{name} couldn't be loaded, falling back to uncached record: #{e}") # rubocop:disable Gitlab/RailsLogger
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else
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raise e
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end
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# Fall back to an uncached value if there are any problems (e.g. Redis down)
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current_without_cache
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end
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def expire
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cache_backend.delete(cache_key)
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rescue
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# Gracefully handle when Redis is not available. For example,
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# omnibus may fail here during gitlab:assets:compile.
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end
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def ensure_cache_setup
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# This is a workaround for a Rails bug that causes attribute methods not
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# to be loaded when read from cache: https://github.com/rails/rails/issues/27348
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define_attribute_methods
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end
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def cache_backend
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Rails.cache
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end
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end
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def cache!
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self.class.cache_backend.write(self.class.cache_key, self, expires_in: 1.minute)
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end
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end
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