private TAggregator?GetAggregatorSlow(ReadOnlySpan <KeyValuePair <string, object?> > labels)
{
AggregatorLookupFunc <TAggregator> lookupFunc = LabelInstructionCompiler.Create(ref this, _createAggregatorFunc, labels);
_cachedLookupFunc = lookupFunc;
bool match = lookupFunc(labels, out TAggregator? aggregator);
Debug.Assert(match);
return(aggregator);
}
public TAggregator?GetAggregator(ReadOnlySpan <KeyValuePair <string, object?> > labels)
{
AggregatorLookupFunc <TAggregator>?lookupFunc = _cachedLookupFunc;
if (lookupFunc != null)
{
if (lookupFunc(labels, out TAggregator? aggregator))
{
return(aggregator);
}
}
// slow path, label names have changed from what the lookupFunc cached so we need to
// rebuild it
return(GetAggregatorSlow(labels));
}
public AggregatorStore(Func <TAggregator?> createAggregator)
{
_stateUnion = null;
_cachedLookupFunc = null;
_createAggregatorFunc = createAggregator;
}