RateTracker Improvements

[toffaletti]

I'd like to replace my firehose client with hbc, but I've hit a wall porting some existing functionality. Essentially my counter-part to RateTracker does persistence to ZooKeeper so backfill count can be calculated over process restarts.

My plan is to make RateTracker an interface, move the current functionality into an implementation BasicRateTracker, and allow RateTracker to be set with ClientBuilder. Does this seem feasible and something you'd like to merge?

[kevinoliver]

Sounds like a nice improvement to add

[caniszczyk]

@toffaletti feel free to issue a pull request when you're ready

[toffaletti]

Apologies, I was under the impression that mentioning the issue id in the commit message would turn this into a pull request.

[caniszczyk]

This is fixed now in a3e552c

[adityapooniya]

Clearly Define the issue in RateTracker. Which type of parameters based on this RateTracker tracking the result... Then we have solve the problem.