IEnumerable <LogEvent> ReadUsing(StreamReader reader, string filePath, CancellationToken cancellationToken, bool throwWhenCancelled)
{
var fileNumber = FileSnap.Create(filePath).FileNumber;
var lineCounter = 0;
try
{
using (reader)
{
string line;
var firstIteration = true;
while ((line = reader.ReadLine()) != null)
{
if (throwWhenCancelled)
{
cancellationToken.ThrowIfCancellationRequested();
}
else if (cancellationToken.IsCancellationRequested)
{
yield break;
}
if (!line.EndsWith("#"))
{
_logger.Verbose($"Line {line} did not end with #");
yield break;
}
lineCounter++;
if (firstIteration)
{
_logger.Verbose($"Successfully initiated read operation from file {filePath}");
firstIteration = false;
}
var position = reader.GetBytePosition();
var data = Convert.FromBase64String(line.Substring(0, line.Length - 1));
yield return(new LogEvent(data, fileNumber, position));
}
}
}
finally
{
if (lineCounter > 0)
{
_logger.Verbose($"Successfully read {lineCounter} lines from file {filePath}");
}
}
}
async Task DeleteFile(FileSnap file, CancellationToken cancellationToken)
{
var filePath = file.FilePath;
try
{
File.Delete(filePath);
_logger.Verbose($"Deleted file {filePath}");
}
catch (Exception exception)
{
throw new IOException($"Could not delete file {filePath}", exception);
}
}
