func createNamedIterator(
theStore *store.Store,
endpointId interface{},
iteratorName string,
rollUpSpan time.Duration) (store.NamedIterator, float64) {
if rollUpSpan == 0 {
return theStore.NamedIteratorForEndpoint(
iteratorName,
endpointId,
kLookAheadWritingToPStore,
)
}
// TODO: Strategy hard coded for now, but really the pstore writer
// in use should dictate the grouping strategy. For now, all our
// pstore writers convert numeric metrics to float64 which is why
// the store.GroupByPathAndNumeric strategy works for now.
return theStore.NamedIteratorForEndpointRollUp(
iteratorName,
endpointId,
rollUpSpan,
kLookAheadWritingToPStore,
store.GroupMetricByPathAndNumeric,
)
}
