write_serialized_entry

# File activesupport/lib/active_support/cache/redis_cache_store.rb, line 369
        def write_serialized_entry(key, payload, raw: false, unless_exist: false, expires_in: nil, race_condition_ttl: nil, **options)
          # If race condition TTL is in use, ensure that cache entries
          # stick around a bit longer after they would have expired
          # so we can purposefully serve stale entries.
          if race_condition_ttl && expires_in && expires_in > 0 && !raw
            expires_in += 5.minutes
          end

          modifiers = {}
          if unless_exist || expires_in
            modifiers[:nx] = unless_exist
            modifiers[:px] = (1000 * expires_in.to_f).ceil if expires_in
          end

          failsafe :write_entry, returning: false do
            redis.with { |c| c.set key, payload, **modifiers }
          end
        end