You can do this in Java 8 (but it might be a bit h...

# getting-started

[marstran]

You can do this in Java 8 (but it might be a bit hard to read):

return Optional.ofNullable(req.cookies)
               .flatmap(::extractFromCookie)
               .map(Optional::of)
               .orElseGet {
                    Optional.ofNullable(req.header)
                            .flatMap(::extractFromHeader)
               }