Github user kanakb commented on the pull request:
https://github.com/apache/helix/pull/6#issuecomment-57730714
Why not have an abstract ProgressReportingTask that implements task and
includes all the JMX persistence, and then have tasks extends from that and
implement getProgress()? That avoids the interface change, but also allows
"smarter" tasks to let their progress be known.
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