async Task Worker()
{
await startEvent.Task;
long startPosition = 0;
bool startPositionValid = false;
if (options.StartPositions != null)
{
startPositionValid = options.StartPositions.TryGetValue(logSource, out startPosition);
}
using (var cancellation = CancellationTokenSource.CreateLinkedTokenSource(cancellations.ToArray()))
using (var progressSink = new Progress.MultiplexingProgressEventsSink(progressSinks))
{
await logSource.Provider.Search(
new SearchAllOccurencesParams(options.Filters, options.SearchInRawText,
startPositionValid ? startPosition : new long?()),
(msg) =>
{
Func <SearchResultMessage, bool> callback;
var callbackKey = new NullableDictionaryKey <IFilter>(msg.FilteringResult.Filter);
if (callbacks.TryGetValue(callbackKey, out callback) && !callback(msg))
{
callbacks.Remove(callbackKey);
}
return(callbacks.Count > 0);
},
cancellation.Token,
progress : progressSink
);
}
}
int IEqualityComparer <NullableDictionaryKey <T> > .GetHashCode(NullableDictionaryKey <T> obj)
{
return(obj.Value?.GetHashCode() ?? 0);
}
bool IEqualityComparer <NullableDictionaryKey <T> > .Equals(NullableDictionaryKey <T> x, NullableDictionaryKey <T> y)
{
return(x.Value == y.Value);
}