Mark Payne created NIFI-3863:
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Summary: Create a LookupRecord Processor
Key: NIFI-3863
URL: https://issues.apache.org/jira/browse/NIFI-3863
Project: Apache NiFi
Issue Type: New Feature
Components: Extensions
Reporter: Mark Payne
Assignee: Mark Payne
We should provide a mechanism to fetch a value from a Record, and then lookup
that value in a "lookup table." If we get a match, we should add the result
back into a field in the Record.
The Processor would be configured with a Record Reader and a Record Writer. It
would also take a RecordPath as a 'Lookup Path' that indicates where in the
Record the desired value should be pulled from. We then lookup the value from
that field. There should also be a 'Destination Path' property that indicates
where the value should be added back to the record. The record should then be
routed to either a 'matched' relationship if there was a value in the lookup
table, or an 'unmatched' relationship if there was no value in the lookup table.
The 'Destination Path' property should be optional. This way, if it is set,
this Processor would function as an 'enrichment processor.' If the property is
not set, this Processor would function as a 'routing processor', by routing to
either 'matched' or 'unmatched' depending on whether or not its value is found
in the Lookup Table.
This means that we also need to build a Lookup Table type of Controller
Service. It would be best to provide two implementations: a Properties
File-based lookup service and a Simple Key-Value Lookup Service. The Simple
Key-Value service would just allow the user to add properties where the
Property Name is the Key and the Property Value is the value.
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