String interpolation in Apache NiFi

  • 22 April, 2024
  • By Dave Cassel
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In one of my recent posts, I talked about ExecuteScriptMarkLogic, a handy processor for getting Apache NiFi to talk to Progress MarkLogic. I’d like to share a couple little “gotchas” that we’ve run into before. I’m using ExecuteScriptMarkLogic to illustrate the point, but it applies to any processor where we use JavaScript code in the […]

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Apache NiFi and Progress MarkLogic

  • 10 April, 2024
  • By Dave Cassel
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For years, I’ve used Apache NiFi as a data orchestration tool. Based on NiFi’s built-in scheduler, we pull data from upstream sources, send it to Progress MarkLogic, and trigger MarkLogic to take certain actions on that data. We also use NiFi to ask MarkLogic for information that is ready to process and take action based […]

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Setting an attribute with a dynamic property name

  • 28 April, 2021
  • By Dave Cassel
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The NiFi EvaluateJsonPath processor lets you specify a JSON path, which will be applied to the content of a flow file. For most situations that works great, but what if you want to retrieve a value where the property you want to read depends on a flow file attribute? EvaluateJsonPath doesn’t support the expression language […]

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