public void Reset()
{
if (_stream != null)
{
_stream?.Dispose();
_stream = null;
}
_indexCurrentFile = 0;
UpdateEventLogFilesFromDirectory();
_currentFileEventNumber = 0;
_currentRow = null;
}
private bool InitializeReadFileStream()
{
if (_stream == null)
{
if (_logFilesWithData.Length <= _indexCurrentFile)
{
_currentRow = null;
return(false);
}
string currentFile = _logFilesWithData[_indexCurrentFile];
if (!File.Exists(currentFile))
{
return(false);
}
InitializeStream(_indexCurrentFile);
_currentFileEventNumber = 0;
}
return(true);
}
public async Task StartReadEvents(CancellationToken cancellationToken)
{
while (CurrentFile != null)
{
if (!InitializeReadFileStream())
{
return;
}
RaiseBeforeReadFileEvent(out bool cancelBeforeReadFile);
if (cancelBeforeReadFile)
{
NextFile();
await StartReadEvents(cancellationToken);
return;
}
_position = null;
_currentRow = null;
_currentFileEventNumber = 1;
var currentLogFile = _logFilesWithData[_indexCurrentFile];
FileInfo currentLogFileInfo = new FileInfo(currentLogFile);
try
{
XEFileEventStreamer xeReader = new XEFileEventStreamer(_stream);
await xeReader.ReadEventStream(() =>
{
_position = new ExtendedEventsPosition(
_currentFileEventNumber,
CurrentFile,
null,
null,
false,
currentLogFileInfo.CreationTimeUtc,
currentLogFileInfo.LastWriteTimeUtc);
RaiseOnReadMetadata(new OnReadMetadataArgs(_position));
return(Task.CompletedTask);
},
(eventData) =>
{
_position = new ExtendedEventsPosition(
_currentFileEventNumber,
CurrentFile,
eventData.UUID.ToString(),
eventData.Timestamp,
false,
currentLogFileInfo.CreationTimeUtc,
currentLogFileInfo.LastWriteTimeUtc);
_currentRow = new ExtendedEvent(_currentFileEventNumber, eventData);
RaiseOnRead(new OnReadEventArgs(_currentRow, _position, _currentFileEventNumber));
_currentFileEventNumber++;
return(Task.CompletedTask);
}, cancellationToken);
_currentRow = null;
if (_position != null)
{
_position = new ExtendedEventsPosition(
_position.EventNumber,
_position.CurrentFileData,
_position.EventUUID,
_position.EventPeriod,
true,
currentLogFileInfo.CreationTimeUtc,
currentLogFileInfo.LastWriteTimeUtc
);
}
RaiseOnRead(new OnReadEventArgs(_currentRow, _position, _currentFileEventNumber));
NextFile();
}
catch (Exception ex)
{
RaiseOnError(new OnErrorEventArgs(ex));
break;
}
}
}