private void OnConfigurationReload(object state)
{
try
{
// The settings object needs to change here, because the old one is probably holding on
// to an old change token.
_settings = _settings.Reload();
var includeScopes = _settings?.IncludeScopes ?? false;
foreach (var logger in _loggers.Values)
{
logger.Filter = GetFilter(logger.Name, _settings);
logger.IncludeScopes = includeScopes;
}
}
catch (Exception ex)
{
System.Console.WriteLine($"Error while loading configuration changes.{Environment.NewLine}{ex}");
}
finally
{
// The token will change each time it reloads, so we need to register again.
if (_settings?.ChangeToken != null)
{
_settings.ChangeToken.RegisterChangeCallback(OnConfigurationReload, null);
}
}
}
public RollingFileLoggerProvider(IRollingFileLoggerSettings settings)
{
//_env = env;
_settings = settings ?? throw new ArgumentNullException(nameof(settings));
if (_settings.ChangeToken != null)
{
_settings.ChangeToken.RegisterChangeCallback(OnConfigurationReload, null);
}
}
private Func <string, LogLevel, bool> GetFilter(string name, IRollingFileLoggerSettings settings)
{
if (_filter != null)
{
return(_filter);
}
if (settings != null)
{
foreach (var prefix in GetKeyPrefixes(name))
{
LogLevel level;
if (settings.TryGetSwitch(prefix, out level))
{
return((n, l) => l >= level);
}
}
}
return((n, l) => false);
}
/// <summary>
/// Adds a rolling file logger that is enabled as defined in settings.
/// (consider using the ILoggingBuilder extension instead)
/// </summary>
/// <param name="factory"></param>
/// <param name="settings"></param>
/// <returns></returns>
internal static ILoggerFactory AddRollingFile(this ILoggerFactory factory, IRollingFileLoggerSettings settings)
{
factory.AddProvider(new RollingFileLoggerProvider(settings));
return(factory);
}