Three of the Metric in the yammer library are based on data that is
pushed to them: Counter, Histogram and Meter.
This patch modify the specific functionality by inherit the original
Meter, keeping its functionality and API, and modify the way the data is
collected.
For Counter: A call to count will be implementing by calling the API to
retreive a value.
For Meter: A call to count will be implementing by calling the API to
retreive a value, similiar to count, but the timer aspect of the Meter
remains the same.
For histogram: Histogram uses an internal sample container. To mimic the
behaviour, a call to any of the historgram get functionality will update
the sample container first. A timestamp of the last update limits the
number of updates that will be done by the histogram.
Signed-off-by: Amnon Heiman <amnon@cloudius-systems.com>
