public static async Task RunNormal(string[] wordlist)
{
//for (int i = 0; i < wordlist.Length; i++)
//{
// await GetDirectory(url, wordlist[i]);
//}
await ParallelAsync.ForeachAsync(wordlist, ExecutionOptions.threadCount, async directory =>
{
await GetDirectory(directory);
});
}
public static async Task RunExt(string[] wordlist)
{
await ParallelAsync.ForeachAsync(wordlist, ExecutionOptions.threadCount, async directory =>
{
await GetDirectory(directory);
for (int j = 0; j < ExecutionOptions.extensions.Length; j++)
{
await GetDirectory(directory + "." + ExecutionOptions.extensions[j]);
}
});
}
private void ReadDataBackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
//Parquet.NET doesn't have any async methods or readers that allow sequential records reading so we need to use the ThreadPool to support cancellation.
Task task = null;
var results = new ConcurrentDictionary <int, ParquetReadResult>();
var cancellationToken = new System.Threading.CancellationTokenSource();
if (AppSettings.ReadingEngine == ParquetEngine.Default)
{
task = Task.Run(() =>
{
using (var parquetReader = ParquetReader.OpenFromFile(this.OpenFilePath, new ParquetOptions()
{
TreatByteArrayAsString = true
}))
{
DataTable result = UtilityMethods.ParquetReaderToDataTable(parquetReader, this.SelectedFields, this.CurrentOffset, this.CurrentMaxRowCount, cancellationToken.Token);
results.TryAdd(1, new ParquetReadResult(result, parquetReader.ThriftMetadata.Num_rows));
}
});
}
else
{
int i = 0;
var fieldGroups = new List <(int, List <string>)>();
foreach (List <string> fields in UtilityMethods.Split(this.SelectedFields, (int)(this.selectedFields.Count / Environment.ProcessorCount)))
{
fieldGroups.Add((i++, fields));
}
task = ParallelAsync.ForeachAsync(fieldGroups, Environment.ProcessorCount,
async fieldGroup =>
{
await Task.Run(() =>
{
using (Stream parquetStream = new FileStream(this.OpenFilePath, FileMode.Open, FileAccess.Read))
using (var parquetReader = new ParquetReader(parquetStream, new ParquetOptions()
{
TreatByteArrayAsString = true
}))
{
DataTable result = UtilityMethods.ParquetReaderToDataTable(parquetReader, fieldGroup.Item2, this.CurrentOffset, this.CurrentMaxRowCount, cancellationToken.Token);
results.TryAdd(fieldGroup.Item1, new ParquetReadResult(result, parquetReader.ThriftMetadata.Num_rows));
}
});
});
}
while (!task.IsCompleted && !((BackgroundWorker)sender).CancellationPending)
{
task.Wait(1000);
}
if (((BackgroundWorker)sender).CancellationPending)
{
cancellationToken.Cancel();
e.Cancel = true;
}
if (task.IsCompleted)
{
if (results.Count > 0)
{
DataTable mergedDataTables = UtilityMethods.MergeTables(results.OrderBy(f => f.Key).Select(f => f.Value.Result).AsEnumerable());
ParquetReadResult finalResult = new ParquetReadResult(mergedDataTables, results.First().Value.TotalNumberOfRecordsInFile);
e.Result = finalResult;
}
else
{
//The code should never reach here
e.Result = new ParquetReadResult(new DataTable(), 0);
}
}
}
