Hi Jorg, transform(), transformValues, and process() are not stateful if you do not add any state store to them. You only need to leave the variable-length argument empty.
Within those methods you can implement your desired filter operation. Best, Bruno On Thu, Jul 4, 2019 at 11:51 AM Jorg Heymans <jheym...@apache.org> wrote: > > Hi, > > I understand that it's currently not possible to access message headers from > the filter() DSL operation, is there a semantically equivalent (stateless) > operation that can achieve the same result ? I understand that transform(), > transformValues() and process() could achieve the same result but they are > stateful. > > Thanks, > Jorg > >