The situation I have is the need to keep a NoSQL data store in sync with a legacy database with minimal intrusiveness on the operational legacy environment. Only selected entries in the legacy database need to be propagated to the NoSQL database with some data transformation/enrichment. I'm considering using NiFi for this scenario. My thought is to use TailFile processor to 'tail' the legacy database log file and have it act only on certain file entries. Conceptually, the filtering could be done via the Expression Language. Does NiFi TailFile Processor support Expression Language to filter the file entries of interest? If not, how else can this be done? Thanks for your help in advance!
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