question Re: nifi Json data using routeonattributeto to split attribute or attribute value in Support Questions

nifi Json data using routeonattributeto to split attribute or attribute value

Deenag — Tue, 15 Oct 2019 21:16:00 GMT

nifi Json data using routeonattributeto to split a...

I am currently working to consume data using Nifi related to tealium event stream and load into HDFS. Need help in filtering the data when source misses to send data for json attribute.

{"account":"newt","twitter:description":"Discover when your favorite New TV shows and hosts are being shown. ","og:locale":"en_US","dcterms:publisher":"New TV","original-source":"www.newtv.com/","og:url":"www.newtv.com/show/program-guide"}},"post_time":"2019-10-09 11:27:46","useragent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.90 Safari/537.36","event_id":"12345"}

Sample above message. I am currently stuck with filtering the data when source misses to send data for event_id attribute.

Current Nifi flow, Consume Kafka -> Evaluate Json Path -> Jolttransform Json -> Evaluate Json Path-> RouteOnAttribute -> Merge Content -> Evaluate Json Path -> Update attribute -> PutHDFS ->MoveHDFS

Need help how to split data using RouteOnAttribute to split missing event_id or event_id value to two different flows.

Flow 1 - To split available event_id attribute.

Flow 2 - Missing Event_ID or Event_ID attribute values to treat as error and load into different flow.

Re: nifi Json data using routeonattributeto to split attribute or attribute value

Shu_ashu — Wed, 16 Oct 2019 03:12:26 GMT

In EvaluateJsonPath processor add new property to extract event_id value from the flowfile.

if flowfile is not having event_id then nifi adds empty value to the attribute.

EvaluateJsonPath Configs:

Then by using RouteOnAttribute processor we can check the attribute value and route the flowfile accordingly.

RouteOnAttribute Configs:

not null value

${event_id:isEmpty():not()}

null value

${event_id:isEmpty()}

Then use null value and not null value relationships for further processing..!!

Re: nifi Json data using routeonattributeto to split attribute or attribute value

Deenag — Wed, 16 Oct 2019 12:07:12 GMT

@Shu_ashu Thank you for the solution.

I have got the issue resolved as it is working as expected.