private TextStreamWriter CreateWriter()
{
string fileName = _fileBaseName;
if (string.IsNullOrEmpty(fileName))
{
fileName = Path.GetFullPath("log.log");
}
DirectoryInfo dinfo = new DirectoryInfo(Path.GetDirectoryName(fileName));
string name = Path.GetFileNameWithoutExtension(fileName);
if (!dinfo.Exists)
{
dinfo.Create();
}
FileStream stream = null;
using (StringBuilderCache c = StringBuilderCache.Acquire()) {
c.Builder.Append(Path.Combine(dinfo.FullName, name)).Append('-');
string ext = Path.GetExtension(fileName);
FileRollOver rollOver = _settings.RollOver;
if (rollOver >= FileRollOver.Monthly &&
rollOver <= FileRollOver.Hourly)
{
GetDateMetric(c, rollOver);
}
else if (rollOver == FileRollOver.Size)
{
stream = GetCounterFile(c.Builder, dinfo, name, ext);
}
else
{
_metricDue = DateTime.MaxValue;
}
c.Builder.Append(ext);
fileName = c.ToString();
}
if (stream == null)
{
stream = new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.Read);
}
//} catch ( IOException ) {
// fileName += Guid.NewGuid().ToString();
// stream = new FileStream( fileName, FileMode.Append, FileAccess.Write, FileShare.Read );
//}
var file = new TextStreamWriter(stream, Encoding.UTF8, 4096, true);
using (StringBuilderCache c = StringBuilderCache.Acquire()) {
c.Builder.Append("## ")
.Append(stream.Length > 0 ? "Append" : "Created")
.Append('[')
.Append(DateTime.UtcNow.ToString("s", DateTimeFormatInfo.InvariantInfo))
.Append(']')
.Append(Environment.NewLine);
file.Write(c);
}
return(file);
}
protected void ReloadFileLoggerOptions(FileLoggerSettings settings)
{
lock ( _fileSync ) {
bool resetStream = _rollOver != settings.RollOver;
_rollOver = settings.RollOver;
if (settings.FileName != _fileBaseName)
{
_fileBaseName = settings.FileName;
resetStream = true;
}
if (resetStream && _file != null)
{
Interlocked.Exchange(ref _file, null)?.Dispose();
}
}
_settings = settings;
ReloadLoggerOptions(settings);
}
private bool CloseCurrent()
{
FileRollOver rollOver = _settings.RollOver;
if (rollOver == FileRollOver.Size)
{
int maxSize = _settings.MaxFileSize;
if (maxSize <= 0)
{
maxSize = 1024;
}
if (_file.BaseStream.Length / (1024 * 1024) <= maxSize)
{
return(false);
}
}
Interlocked.Exchange(ref _file, null)?.Dispose();
return(true);
}
private void GetDateMetric(StringBuilder b, FileRollOver rollOver)
{
var dt = DateTime.UtcNow;
int year = dt.Year;
int month = dt.Month;
int day = dt.Day;
int hour = dt.Hour;
b.Append(year);
b.Append('-');
if (month <= 9)
{
b.Append('0');
}
b.Append(month);
if (rollOver >= FileRollOver.Daily)
{
b.Append('-');
if (day <= 9)
{
b.Append('0');
}
b.Append(day);
if (rollOver >= FileRollOver.Hourly)
{
b.Append('T');
if (hour <= 9)
{
b.Append('0');
}
b.Append(hour);
}
}
switch (rollOver)
{
case FileRollOver.Monthly:
_metricDue = new DateTime(year, month, 1, 0, 0, 0, DateTimeKind.Utc).AddMonths(1);
break;
case FileRollOver.Daily:
_metricDue = new DateTime(year, month, day, 0, 0, 0, DateTimeKind.Utc).AddDays(1);
break;
case FileRollOver.Hourly:
_metricDue = new DateTime(year, month, day, hour, 0, 0, DateTimeKind.Utc).AddHours(1);
break;
default:
// ?? Minutes from now
int minutes = dt.Minute;
b.Append('-');
if (minutes <= 9)
{
b.Append('0');
}
b.Append(minutes);
// size checking every 4 minutes
_metricDue = dt.AddMinutes(4);
break;
}
}