read_entry

# File activesupport/lib/active_support/cache/file_store.rb, line 75
        def read_entry(key, **options)
          if File.exist?(key)
            entry = File.open(key) { |f| deserialize_entry(f.read) }
            entry if entry.is_a?(Cache::Entry)
          end
        rescue => e
          logger.error("FileStoreError (#{e}): #{e.message}") if logger
          nil
        end