async Task <HashSet <string> > GetPatientSetAsync(IReadOnlyCollection <LeafQuery> queries, CancellationToken token)
{
var partials = new ConcurrentBag <PartialPatientCountContext>();
var tasks = new List <Task>();
using (var throttler = new SemaphoreSlim(clinDbOpts.Cohort.MaxParallelThreads))
{
foreach (var q in queries)
{
await throttler.WaitAsync();
tasks.Add(
Task.Run(async() =>
{
var result = await GetPartialContext(q, token);
throttler.Release();
partials.Add(result);
})
);
}
await Task.WhenAll(tasks);
}
token.ThrowIfCancellationRequested();
return(patientCountAggregator.Aggregate(partials));
}
async Task <HashSet <string> > GetPatientSetAsync(IReadOnlyCollection <LeafQuery> queries, CancellationToken token)
{
var all = queries.Select(q => GetPartialContext(q, token));
var partials = await Task.WhenAll(all);
token.ThrowIfCancellationRequested();
return(patientCountAggregator.Aggregate(partials));
}