@mayki wogno user defined arguments aren't really sent to ExecuteScript. If the value of the `filename` attribute is needed, it can be retrieved from the flow file itself. Below is an example of how to retrieve the `filename` attribute, update the attribute, and send the flow file to a `success` relationship. flowFile = session.get()
if (flowFile != None):
filename = flowFile.getAttribute("filename")
flowFile = session.putAttribute(flowFile, "filename", filename + "new_name")
session.transfer(flowFile, REL_SUCCESS)
For an example that is a little more in depth, you can download a template from this gist. For a deeper look into developing with NiFi, please see the developer's guide.
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