New returns a *Controller configured with an aggregation selector and options.

WithCachePeriod sets the CachePeriod configuration option of a Config.

WithResource sets the Resource configuration option of a Config.

DefaultCachePeriod determines how long a recently-computed result will be returned without gathering metric data again.

Config contains configuration for a pull Controller.

Controller manages access to a *sdk.Accumulator and *basic.Processor.

Option is the interface that applies the value to a configuration option.