private void FindNearestBeginEventPosition(ref bool isCorrectBeginEvent, string currentFilePath, ref long newStreamPosition, int stepSize = 1)
{
int attemptToFoundBeginEventLine = 0;
while (!isCorrectBeginEvent && attemptToFoundBeginEventLine < 10)
{
string beginEventLine;
using (FileStream fileStreamCheckPosition =
new FileStream(currentFilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
fileStreamCheckPosition.Seek(newStreamPosition, SeekOrigin.Begin);
using (StreamReader fileStreamCheckReader = new StreamReader(fileStreamCheckPosition))
beginEventLine = fileStreamCheckReader.ReadLineWithoutNull();
}
if (beginEventLine == null)
{
isCorrectBeginEvent = false;
break;
}
isCorrectBeginEvent = LogParserLGF.ItsBeginOfEvent(beginEventLine);
if (!isCorrectBeginEvent)
{
newStreamPosition -= stepSize;
attemptToFoundBeginEventLine += 1;
}
}
}
public override bool GoToEvent(long eventNumber)
{
Reset();
int fileIndex = -1;
long currentLineNumber = -1;
long currentEventNumber = 0;
bool moved = false;
foreach (string logFile in _logFilesWithData)
{
fileIndex += 1;
currentLineNumber = -1;
IEnumerable <string> allLines = File.ReadLines(logFile);
foreach (string line in allLines)
{
currentLineNumber += 1;
if (LogParserLGF.ItsBeginOfEvent(line))
{
currentEventNumber += 1;
}
if (currentEventNumber == eventNumber)
{
moved = true;
break;
}
}
if (currentEventNumber == eventNumber)
{
moved = true;
break;
}
}
if (moved && fileIndex >= 0 && currentLineNumber >= 0)
{
InitializeStream(currentLineNumber, fileIndex);
_eventCount = eventNumber - 1;
_currentFileEventNumber = eventNumber;
return(true);
}
else
{
return(false);
}
}
private long GetEventCount()
{
long eventCount = 0;
foreach (var logFile in _logFilesWithData)
{
using (StreamReader logFileStream = new StreamReader(File.Open(logFile, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)))
{
do
{
string logFileCurrentString = logFileStream.ReadLine();
if (LogParserLGF.ItsBeginOfEvent(logFileCurrentString))
{
eventCount++;
}
} while (!logFileStream.EndOfStream);
}
}
return(eventCount);
}
private bool NextLineIsBeginEvent()
{
if (CurrentFile == null || _stream == null)
{
return(false);
}
bool nextIsBeginEvent;
long currentStreamPosition = _stream.GetPosition();
using (FileStream fileStreamCheckReader = new FileStream(CurrentFile, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
using (StreamReader checkReader = new StreamReader(fileStreamCheckReader))
{
checkReader.SetPosition(currentStreamPosition);
string lineContent = checkReader.ReadLineWithoutNull();
nextIsBeginEvent = LogParserLGF.ItsBeginOfEvent(lineContent);
}
}
return(nextIsBeginEvent);
}
