// TODO: not sure if this is the way we want to configure the logger, however, this
// honors the principle of being a code based configuration vs XML/file based.
public NLogFactory(LogFileSettings settings)
{
string fileName = settings.NamePrefix;
string archiveFileName = settings.NamePrefix + ".{###}";
if (!string.IsNullOrEmpty(settings.ArchiveName))
{
archiveFileName = settings.ArchiveName;
}
FileTarget target
= new FileTarget
{
Layout = "${longdate} [${threadid}] ${level} ${logger} - ${message}",
FileName = CreatePathFromSettings(settings.DirectoryPath, fileName, settings.Ext),
ArchiveFileName = CreatePathFromSettings(settings.DirectoryPath, archiveFileName, settings.Ext),
ArchiveEvery = ConvertRollingPeriod(settings.RolloverFrequency),
ArchiveNumbering = ArchiveNumberingMode.Rolling,
MaxArchiveFiles = 100,
DeleteOldFileOnStartup = false,
};
LoggingConfiguration config = new LoggingConfiguration();
LogLevel level = ConvertLogLevel(settings.Level);
config.LoggingRules.Add(new LoggingRule("*", level, target));
// if the event log level is specified, then we will log the the Application EventLog.
// Default is to only log Fatal messages.
if (settings.EventLogLevel != LoggingLevel.Off)
{
EventLogTarget eventLogTarget
= new EventLogTarget
{
Layout = "${logger}: ${message}${newline}${exception:format=ToString}",
Source = settings.EventLogSource,
Log = "Application",
};
LogLevel eventLogLevel = ConvertLogLevel(settings.EventLogLevel);
config.LoggingRules.Add(new LoggingRule("*", eventLogLevel, eventLogTarget));
}
LogManager.Configuration = config;
LogManager.ReconfigExistingLoggers();
}
/// <summary>
/// This is a utility method to convert the values found in the LogFileSection
/// to <see cref="LogFileSettings"/> and to substitute the appearance of a '~'
/// for a call to <see cref="HttpServerUtility.MapPath"/> if this is run inside
/// of a web context, or use the <see cref="Environment.CurrentDirectory"/>.
/// </summary>
/// <remarks>This assumes that there is <logging /> section in the app.config </remarks>
/// <returns>A <see cref="LogFileSettings"/> object.</returns>
public static LogFileSettings GetAsSettings()
{
LogFileSection section = (LogFileSection)ConfigurationManager.GetSection("logging");
if (section == null)
{
return(null);
}
LogFileSettings settings = section.ToSettings();
if (settings.DirectoryPath.Contains("~"))
{
string appDirectory = HostingEnvironment.ApplicationPhysicalPath ?? Environment.CurrentDirectory;
settings.DirectoryPath = settings.DirectoryPath.Replace("~", appDirectory);
}
EventLogHelper.WriteInformation(settings.EventLogSource,
"Writing log file to " + settings.DirectoryPath);
return(settings);
}
