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From Neil Conway <>
Subject Review Request 59483: Replaced the sorter's notion of "activation" with a three-valued enum.
Date Tue, 23 May 2017 06:27:48 GMT

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Review request for mesos, Benjamin Mahler, James Peach, Michael Park, and Jiang Yan Xu.

Repository: mesos


Conceptually, a node in the sorter tree can either be an internal node
or a leaf node. Furthermore, leaf nodes can either be active or inactive
(internal nodes do not have a concept of "activation").

We previously represented this situation with a single boolean,
`active`. The boolean was true for active leaves, and false for inactive
leaves and internal nodes. Whether a node was an internal node was
determined by checking the number of children it has.

This commit replaces `active` with a three-valued enum named `kind`,
which can take on the values `ACTIVE_LEAF`, `INACTIVE_LEAF`, or
`INTERNAL`. This enforces the idea that internal nodes do not have a
notion of "activation", and more explicitly distinguishes between leaf
and internal nodes.


  src/master/allocator/sorter/drf/sorter.hpp fee58d6d1f08163e2a06a4a20c891fe535c3dcff 
  src/master/allocator/sorter/drf/sorter.cpp 26b77f578f3235a8792c72d4575d607cdb2c7de7 



`make check`


Neil Conway

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