Benjamin Mahler created MESOS-1162:
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Summary: Add a 'Percentage' abstraction.
Key: MESOS-1162
URL: https://issues.apache.org/jira/browse/MESOS-1162
Project: Mesos
Issue Type: Improvement
Components: stout
Reporter: Benjamin Mahler
It is currently difficult to add a percentage-based flag, if one desires it to
be specified in the "0%"-"100%" form. This requires creating a {{string}} flag
and doing all the parsing / validation manually.
An alternative is to use a {{double}} flag with 0.0-1.0 being the valid range,
however, this may not read as intuitively to operators.
Another alternative is to use a {{double}} flag with 0.0-100.0 as the valid
range, with the '%' being implicit.
However, these two alternative techniques can lead to confusion since it's not
clear how we're interpreting the value. Requiring the '%' symbol is nice
because it leaves no room for ambiguity.
I would propose adding a 'Percentage' abstraction in stout that provides the
parsing logic for use in flags. Percentages can basically be a wrapper around
the underlying {{double}}.
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