Mark,
Thanks for the tip, I set up the RouteText processor like below and it worked beautifully. First I thought that each matched line will become its own flowfile but thats not the case. All lines that matched become part of a single new flow file. Vijay > On Dec 29, 2018, at 8:18 AM, Mark Payne <[email protected]> wrote: > > Vijay, > > I would recommend using RouteText for that use case. You can then use > Expression Language against line of text to do something like > ${line:startsWith(“{“)} > > It avoids the complexities of regex and is much more efficient. > > Thanks > -Mark > > Sent from my iPhone > > On Dec 29, 2018, at 7:56 AM, Vijay Chhipa <[email protected] > <mailto:[email protected]>> wrote: > >> Hi All, >> >> I have an output from a processor that contains lines that are JSON >> structured, i.e. each line is a JSON by itself. >> In certain cases there are lines that are not JSON and I want to remove >> them. >> >> I tried the ReplaceText processor with the following patterns. >> >> ((.|\n)*?)(?={) >> >> Contents of the input file: >> foobar >> sdkfskdl >> ksdfjlsdj >> {"key":"value"} >> {"key2":"value2"} >> >> Desired output file contents: >> {"key":"value"} >> {"key2":"value2"} >> >> >> In the https://www.regextester.com/ <https://www.regextester.com/> site >> above pattern gives me the following matched string: >> >> <PastedGraphic-1.png> >> >> >> When I put the above in the ReplaceText Processor like this >> <PastedGraphic-2.png> >> I get an error that this is not a valid Java regular expression: >> >> <PastedGraphic-3.png> >> >> Why is this not valid, and is there an online reg ex checked that I can >> validate with before putting it in NiFi? >> Also should I be using a different processor than the ReplaceText for this >> purpose? >> >> >> Thank you for your help and Happy New Year. >> >> Vijay >> >> >> >> > <PastedGraphic-2.png><PastedGraphic-3.png><PastedGraphic-1.png>
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