write_entry

# File activesupport/lib/active_support/cache/redis_cache_store.rb, line 386
        def write_entry(key, entry, unless_exist: false, raw: false, expires_in: nil, race_condition_ttl: nil, **options)
          serialized_entry = serialize_entry(entry, raw: raw)

          # 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

          failsafe :write_entry, returning: false do
            if unless_exist || expires_in
              modifiers = {}
              modifiers[:nx] = unless_exist
              modifiers[:px] = (1000 * expires_in.to_f).ceil if expires_in

              redis.with { |c| c.set key, serialized_entry, **modifiers }
            else
              redis.with { |c| c.set key, serialized_entry }
            end
          end
        end