public EventLogReader(EventLogReaderSettings settings)
{
_settings = settings;
_lgfReader = new LgfReader(Path.Combine(_settings.LogFolder, "1Cv8.lgf"));
_lgfReader.SetPosition(settings.LgfStartPosition);
if (settings.LgpFileName != string.Empty)
{
var file = Path.Combine(_settings.LogFolder, settings.LgpFileName);
_lgpReader = new LgpReader(file, settings.TimeZone, _lgfReader);
_lgpReader.SetPosition(settings.LgpStartPosition);
}
}
protected virtual void Dispose(bool disposing)
{
if (!_disposedValue)
{
_lgpFilesWatcher?.Dispose();
_lgpFilesWatcher = null;
_lgpChangedCreated?.Dispose();
_lgpChangedCreated = null;
_lgfReader?.Dispose();
_lgfReader = null;
_lgpReader?.Dispose();
_lgpReader = null;
_disposedValue = true;
}
}
private bool SetNextLgpReader()
{
var currentReaderLastWriteDateTime = DateTime.MinValue;
if (_lgpReader != null)
{
currentReaderLastWriteDateTime = new FileInfo(_lgpReader.LgpPath).LastWriteTime;
}
var filesDateTime = new List <(string, DateTime)>();
var files = Directory.GetFiles(_settings.LogFolder, "*.lgp");
foreach (var file in files)
{
if (_lgpReader != null)
{
if (_lgpReader.LgpPath != file)
{
filesDateTime.Add((file, new FileInfo(file).LastWriteTime));
}
}
else
{
filesDateTime.Add((file, new FileInfo(file).LastWriteTime));
}
}
var orderedFiles = filesDateTime.OrderBy(c => c.Item2).ToList();
var nextFile = orderedFiles.FirstOrDefault(c => c.Item2 > currentReaderLastWriteDateTime);
if (string.IsNullOrEmpty(nextFile.Item1))
{
return(false);
}
else
{
_lgpReader?.Dispose();
_lgpReader = null;
_lgpReader = new LgpReader(nextFile.Item1, _settings.TimeZone, _lgfReader);
return(true);
}
}
protected virtual void Dispose(bool disposing)
{
if (!_disposedValue)
{
if (disposing)
{
// TODO: освободить управляемое состояние (управляемые объекты)
}
_lgpFilesWatcher?.Dispose();
_lgpFilesWatcher = null;
_lgpChangedCreated?.Dispose();
_lgpChangedCreated = null;
_lgfReader?.Dispose();
_lgfReader = null;
_lgpReader?.Dispose();
_lgpReader = null;
_disposedValue = true;
}
}
/// <summary>
/// The behaviour of the method depends on the mode of the reader. In the "live" mode it'll be waiting for an appearing
/// of the new event item, otherwise It'll just return null
/// </summary>
/// <param name="cancellationToken">Token for interrupting of the reader</param>
/// <returns></returns>
public EventLogItem ReadNextEventLogItem(CancellationToken cancellationToken = default)
{
if (_lgpReader == null)
{
SetNextLgpReader();
}
if (_settings.LiveMode && _lgpFilesWatcher == null)
{
StartLgpFilesWatcher();
}
EventLogItem item = null;
while (!cancellationToken.IsCancellationRequested)
{
try
{
item = _lgpReader.ReadNextEventLogItem(cancellationToken);
}
catch (ObjectDisposedException)
{
item = null;
_lgpReader = null;
break;
}
if (item == null)
{
var newReader = SetNextLgpReader();
if (_settings.LiveMode)
{
if (!newReader)
{
_lgpChangedCreated.Reset();
var waitHandle = WaitHandle.WaitAny(
new[] { _lgpChangedCreated, cancellationToken.WaitHandle }, _settings.ReadingTimeout);
if (_settings.ReadingTimeout != Timeout.Infinite && waitHandle == WaitHandle.WaitTimeout)
{
throw new EventLogReaderTimeoutException();
}
_lgpChangedCreated.Reset();
}
}
else
{
if (!newReader)
{
break;
}
}
}
else
{
_settings.ItemId++;
item.Id = _settings.ItemId;
break;
}
}
return(item);
}
