Getting Started With Custom Processor for Apache NiFi

Writing Custom Processors for Apache NiFi is easy.   I recommend you start with Apache NiFi 1.9.

You can download from Cloudera or the Apache NiFi site.

You will also need JDK 8 and Maven.   And IDE like Eclipse or IntelliJ IDEA is helpful as well.  I recommend a Linux or OSX machine to develop from.

Just build a new processor shell using:  https://cwiki.apache.org/confluence/display/NIFI/Maven+Projects+for+Extensions


I have written a few Custom Processors for Apache NiFi, you can look at the source code:

https://community.hortonworks.com/content/kbentry/229215/apache-nifi-processor-for-apache-mxnet-ssd-single.html

https://community.hortonworks.com/content/kbentry/116803/building-a-custom-processor-in-apache-nifi-12-for.html

https://github.com/tspannhw/nifi-mxnetinference-processor

https://github.com/tspannhw/nifi-extracttext-processor

https://github.com/tspannhw/nifi-langdetect-processor

https://github.com/tspannhw/nifi-attributecleaner-processor

https://github.com/tspannhw/nifi-convertjsontoddl-processor

https://github.com/tspannhw/nifi-postimage-processor

https://github.com/tspannhw/GetWebCamera

https://github.com/tspannhw/nifi-imageextractor-processor

https://github.com/tspannhw/nifi-puttwitter-processor

https://github.com/tspannhw/nifi-tensorflow-processor

Good Articles:

https://medium.com/hashmapinc/creating-custom-processors-and-controllers-in-apache-nifi-e14148740ea

https://www.nifi.rocks/developing-a-custom-apache-nifi-processor-json/


References:

Apache NiFi Developers Guide
http://nifi.apache.org/docs.html