public async Task <TimeSpan> RunQuery(string query, IDocumentProcessor processor, DicomReprocessorOptions options)
{
DateTime start;
_logger.Info($"Performing query on {_collNamespace}");
using (IAsyncCursor <BsonDocument> cursor = await MongoQueryParser.GetCursor(_collection, _findOptionsBase, query))
{
_logger.Info($"Using MaxDegreeOfParallelism: {_parallelOptions.MaxDegreeOfParallelism}");
_logger.Info($"Batch size is: {(_findOptionsBase.BatchSize.HasValue ? _findOptionsBase.BatchSize.ToString() : "unspecified")}");
_logger.Info($"Sleeping for {options.SleepTime.TotalMilliseconds}ms between batches");
if (!_autoRun)
{
LogManager.Flush();
Console.Write($"Confirm you want to reprocess documents using the above query in {_collNamespace} [y/N]: ");
// Anything other than y/Y cancels the operation
string key = Console.ReadLine();
if (key == null || !key.Equals("y", StringComparison.CurrentCultureIgnoreCase))
{
_logger.Warn("User cancelled reprocessing by not answering 'y', exiting");
return(default(TimeSpan));
}
_logger.Info("User chose to continue with query execution");
}
_logger.Info("Starting reprocess operation");
start = DateTime.Now;
var totalBatches = 0;
//Note: Can only check for the cancellation request every time we start to process a new batch
while (await cursor.MoveNextAsync() && !_tokenSource.IsCancellationRequested)
{
_logger.Debug("Received new batch");
IEnumerable <BsonDocument> batch = cursor.Current;
var batchCount = 0;
Parallel.ForEach(batch, _parallelOptions, document =>
{
processor.ProcessDocument(document);
Interlocked.Increment(ref batchCount);
});
_logger.Debug("Batch converted to messages, count was: " + batchCount);
processor.SendMessages();
if (++totalBatches % 100 == 0)
{
processor.LogProgress();
}
_logger.Debug($"Batch processed, sleeping for {options.SleepTime.TotalMilliseconds}ms");
Thread.Sleep(options.SleepTime);
}
}
TimeSpan queryTime = DateTime.Now - start;
_logger.Info("Reprocessing finished or cancelled, time elapsed: " + queryTime.ToString("g"));
return(queryTime);
}