[jira] [Created] (NIFI-5854) Enhance time unit features

["Andy LoPresto (JIRA)" <ji...@apache.org>]

Andy LoPresto created NIFI-5854:
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             Summary: Enhance time unit features
                 Key: NIFI-5854
                 URL: https://issues.apache.org/jira/browse/NIFI-5854
             Project: Apache NiFi
          Issue Type: Improvement
          Components: Core Framework
    Affects Versions: 1.8.0
            Reporter: Andy LoPresto
            Assignee: Andy LoPresto


There is some ambiguity with time units (specifically around processor properties). Two features which I think should be added:

* Currently only whole numbers are parsed correctly. For example, {{10 milliseconds}} and {{0.010 seconds}} are functionally equivalent, but only the former will be parsed. This is due to the regex used in {{StandardValidators.TIME_PERIOD_VALIDATOR}} which relies on {{FormatUtils.TIME_DURATION_REGEX}} (see below). Decimal amounts should be parsed
* The enumerated time units are *nanoseconds, milliseconds, seconds, minutes, hours, days, weeks*. While I don't intend to extend this to "millennia", etc. as every unit including and above *months* would be ambiguous, *microseconds* seems like a valid and missing unit

*Definition of {{FormatUtils.TIME_DURATION_REGEX}}:*
{code}
    public static final String TIME_DURATION_REGEX = "(\\d+)\\s*(" + VALID_TIME_UNITS + ")";
    public static final Pattern TIME_DURATION_PATTERN = Pattern.compile(TIME_DURATION_REGEX);
{code}



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