I found a section in the nifi expression language documentation of Subjectless Functions. Could/should this feature be added as one of those?
On Mon, Jan 16, 2017 at 11:53 AM, Nick Carenza < [email protected]> wrote: > Thanks Bryan, that is what I ended up doing. PutEmail works the same was > as PutSlack in this regard. It expects you to specify a message as a > property that supports expression language and doesn't give you an option > to use the flowfile's content in the message but _does_ allow you to attach > the flowfile. > > If expression language was capable of retrieving flowfile content > directly, I could reduce the number of processors significantly. > > A major problem with this might be the need to introduce a reserved > attribute which would have the potential to cause compatibility problems in > some flows. Or perhaps a function that could serve as the root of an > expression `${content()}`. > > On Mon, Jan 16, 2017 at 11:26 AM, Bryan Bende <[email protected]> wrote: > >> Nick, >> >> The current approach is to use ExtractText to extract the entire flow >> file content to an attribute which can then be referenced in expression >> language. >> >> Keep in mind this means the entire content will be read into memory which >> in some cases may not be a good idea. >> >> I would think that PutSlack should have a strategy to decide where the >> message should come from (attribute vs content), but I am not familiar with >> that processor to really say if it is a good idea. >> >> -Bryan >> >> >> On Mon, Jan 16, 2017 at 1:40 PM, Nick Carenza < >> [email protected]> wrote: >> >>> Is there any way to access flowfile content with expression language? >>> >>> I am trying to use monitor activity with putslack but monitor activity >>> creates flowfiles with confiugrable content but putslack requires you to >>> supply a message property using expression language which as far as i can >>> tell doesn't have access to that flowfile content. >>> >>> Without having to put another processor in between monitor activity and >>> put slack, is there a way to use the flowfile content directly from >>> expression language? >>> >>> If not does anyone else think this would be really useful to make >>> processors like these more compatible? >>> >> >> >
