Matt Burgess created NIFI-5547:
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             Summary: Allow ScriptedLookupService to retrieve scripted 
Properties before service is enabled
                 Key: NIFI-5547
                 URL: https://issues.apache.org/jira/browse/NIFI-5547
             Project: Apache NiFi
          Issue Type: Improvement
          Components: Extensions
            Reporter: Matt Burgess


Currently, any properties defined in a script for ScriptedLookupService do not 
get added to the ScriptedLookupService dialog until the service is enabled. 
This defeats the purpose of scripted properties as some may be required, and 
enabling the service can instantly render it invalid.

It would be better if ScriptedLookupService worked like InvokeScriptedProcessor 
in the sense that the properties are queried when the ScriptedLookupService 
dialog is "saved"/"applied" by hitting the Apply button on the dialog. Then the 
properties will be added the next time the dialog is opened, and the correct 
validation can be performed.



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