Commons Accumulator Implementations for Sum #119
Description
The ArpNetworking/Commons library now has implementations of different Accumulator patterns to sum Double values with different cost (memory/cpu) and precision. We already support these on the read side in the ISM KairosDb-Extensions. This issue is to support these in CAGG; unfortunately, it's not as straight forward as CAGG's Statistic and Calculator pattern were never intended to be parameterized. Since MAD and CAGG shared a data model at one point, the the design constraints and implementation options are similar. Please see the corresponding issue in MAD for details: