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  1. Apache NiFi
  2. NIFI-6782

Create EL function for repeating a string

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      Description

      As per a discussion with Matt Burgess, an Expression Language function which allowed for a number of repetitions of a string would be useful for generating arbitrary random text in a GenerateFlowFile processor. The usage would be:

      ${"some string here":repeat(4)} # repeats the literal string 4 times
      ${literal("this_is_also_an_attribute_name"):repeat(3)} # repeats the literal string 3 times
      ${my_string_attr:repeat(5)} # repeats the value in the attribute 5 times
      ${"explicit string":repeat(random():mod(10):plus(1))} # repeats the string between 1 and 10 times
      

      If it's easy to implement, I think a multiple parameter option would also be convenient, but it is not a requirement:

      ${"explicit string":repeat(random():mod(10):plus(1))} # repeats the string between 1 and 10 times
      ${"explicit string":repeat(1, 10)} # identical behavior to above
      

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              • Assignee:
                mattyb149 Matt Burgess
                Reporter:
                alopresto Andy LoPresto
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