@mburgess wrote: This article describes various "recipes" on how to accomplish certain tasks with the NiFi processor ExecuteScript, with examples given in Groovy, Jython, Javascript (Nashorn), and JRuby. Recipes in this article of House Music series include: Part 1 - Introduction to the NiFi API and FlowFiles Getting a flow file from an incoming queue Creating new flow files Working with flow file attributes Transferring a flow file Logging Part 2 - FlowFile I/O and Error Handling Reading from a flow file Writing to a flow file Reading and writing to/from a flow file Error Handling Part 3 - Advanced Features Using Dynamic Properties Adding Modules State Management Accessing Controller Services Hopefully these snippets are helpful to illustrate bits of the NiFi API in the context of various scripting languages and flow file operations. I'll put some of these recipes together in a future article, to show some examples of end-to-end scripts. For more examples, use cases, and explanations, please check out my blog. In the next article in this series, I'll talk about reading from and writing to the contents of flow files, as well as discuss error handling techniques. Cheers! Is it going to be paid in future? As you mention term for free for now? ... View more