/// <summary>
/// Convenience method to copy stuff from StreamReader to StreamWriter
/// </summary>
protected void CopyStream(Stream reader, Stream writer)
{
var copy = new StreamCopyOperation(reader, writer);
while (copy.CopyLine() != 0)
{
}
reader.Dispose();
writer.Dispose();
}
/// <summary>
/// Works like the CopyStream method but does a log rotation.
/// </summary>
private void CopyStreamWithRotation(StreamReader reader, string ext)
{
var writer = new FileStream(this.BaseLogFileName + ext, FileMode.Append);
var copy = new StreamCopyOperation(reader.BaseStream, writer);
long fileLength = new FileInfo(this.BaseLogFileName + ext).Length;
int written;
while ((written = copy.CopyLine()) != 0)
{
fileLength += written;
if (fileLength > this.SizeThreshold)
{
writer.Dispose();
try
{
for (int j = this.FilesToKeep; j >= 2; j--)
{
string dst = this.BaseLogFileName + "." + (j - 1) + ext;
string src = this.BaseLogFileName + "." + (j - 2) + ext;
if (File.Exists(dst))
{
File.Delete(dst);
}
if (File.Exists(src))
{
File.Move(src, dst);
}
}
File.Move(this.BaseLogFileName + ext, this.BaseLogFileName + ".0" + ext);
}
catch (IOException e)
{
this.EventLogger.LogEvent("Failed to roll log: " + e.Message);
}
// even if the log rotation fails, create a new one, or else
// we'll infinitely try to roll.
copy.Writer = writer = new FileStream(this.BaseLogFileName + ext, FileMode.Create);
fileLength = new FileInfo(this.BaseLogFileName + ext).Length;
}
}
reader.Dispose();
writer.Dispose();
}
/// <summary>
/// Works like the CopyStream method but does a log rotation based on time.
/// </summary>
private void CopyStreamWithDateRotation(StreamReader reader, string ext)
{
var periodicRollingCalendar = new PeriodicRollingCalendar(this.Pattern, this.Period);
periodicRollingCalendar.Init();
var writer = new FileStream(this.BaseLogFileName + "_" + periodicRollingCalendar.Format + ext, FileMode.Append);
var copy = new StreamCopyOperation(reader.BaseStream, writer);
while (copy.CopyLine() != 0)
{
if (periodicRollingCalendar.ShouldRoll)
{
writer.Dispose();
copy.Writer = writer = new FileStream(this.BaseLogFileName + "_" + periodicRollingCalendar.Format + ext, FileMode.Create);
}
}
reader.Dispose();
writer.Dispose();
}
private void CopyStreamWithRotation(StreamReader reader, string extension)
{
// lock required as the timer thread and the thread that will write to the stream could try and access the file stream at the same time
object fileLock = new();
string baseDirectory = Path.GetDirectoryName(this.BaseLogFileName) !;
string baseFileName = Path.GetFileName(this.BaseLogFileName);
string logFile = this.BaseLogFileName + extension;
var writer = new FileStream(logFile, FileMode.Append);
var copy = new StreamCopyOperation(reader.BaseStream, writer);
long fileLength = new FileInfo(logFile).Length;
// We auto roll at time is configured then we need to create a timer and wait until time is elasped and roll the file over
if (this.AutoRollAtTime is TimeSpan autoRollAtTime)
{
// Run at start
double tickTime = this.SetupRollTimer(autoRollAtTime);
var timer = new System.Timers.Timer(tickTime);
timer.Elapsed += (s, e) =>
{
try
{
timer.Stop();
lock (fileLock)
{
writer.Dispose();
var now = DateTime.Now.AddDays(-1);
int nextFileNumber = this.GetNextFileNumber(extension, baseDirectory, baseFileName, now);
string nextFileName = Path.Combine(baseDirectory, string.Format("{0}.{1}.#{2:D4}{3}", baseFileName, now.ToString(this.FilePattern), nextFileNumber, extension));
File.Move(logFile, nextFileName);
copy.Writer = writer = new FileStream(logFile, FileMode.Create);
fileLength = new FileInfo(logFile).Length;
}
// Next day so check if file can be zipped
this.ZipFiles(baseDirectory, extension, baseFileName);
}
catch (Exception ex)
{
this.EventLogger.LogEvent($"Failed to to trigger auto roll at time event due to: {ex.Message}");
}
finally
{
// Recalculate the next interval
timer.Interval = this.SetupRollTimer(autoRollAtTime);
timer.Start();
}
};
timer.Start();
}
int written;
while ((written = copy.CopyLine()) != 0)
{
lock (fileLock)
{
fileLength += written;
if (fileLength > this.SizeThreshold)
{
try
{
// roll file
var now = DateTime.Now;
int nextFileNumber = this.GetNextFileNumber(extension, baseDirectory, baseFileName, now);
string nextFileName = Path.Combine(
baseDirectory,
string.Format("{0}.{1}.#{2:D4}{3}", baseFileName, now.ToString(this.FilePattern), nextFileNumber, extension));
File.Move(logFile, nextFileName);
// even if the log rotation fails, create a new one, or else
// we'll infinitely try to roll.
copy.Writer = writer = new FileStream(logFile, FileMode.Create);
fileLength = new FileInfo(logFile).Length;
}
catch (Exception e)
{
this.EventLogger.LogEvent($"Failed to roll size time log: {e.Message}");
}
}
}
}
reader.Dispose();
writer.Dispose();
}