tree 01dbee16ba3a95130df2ddc13870eb770bc2900a
parent a3e2e873e08c7c288bd57b7edcb87354060b0f59
author Victor Silva <victor@waltznetworks.com> 1474401659 -0300
committer Yuta HIGUCHI <y-higuchi@onlab.us> 1475176804 +0000

MastershipLoadBalancer: listen to RegionEvents

Simplify logic around scheduling a balancing task and listen
to RegionEvents. Region Membership updates and Region Updates
should also trigger a rebalance.

Now, it is possible to queue up another balancing task even
if there is one running. They'll still never run in parallel
and will still run with at least a few seconds in between (30),
but this way we don't ever risk missing an event that makes it
necessary to rebalance - not even if we were rebalancing exactly
when that event fired.

Change-Id: I64e1c6fc5e87f2b1fffbefb54c96303dac55d1d1