// constructors
public TelnetLoggerProvider(IServiceProvider serviceProvider, Func <string, LogLevel, bool> filter, bool includeScopes)
{
if (filter == null)
{
throw new ArgumentNullException(nameof(filter));
}
this.filter = filter;
this.settings = new TelnetLoggerSettings()
{
IncludeScopes = includeScopes,
};
this.serviceProvider = serviceProvider;
}
public TelnetLoggerProvider(IServiceProvider serviceProvider, ITelnetLoggerSettings settings)
{
if (settings == null)
{
throw new ArgumentNullException(nameof(settings));
}
this.settings = settings;
this.serviceProvider = serviceProvider;
if (this.settings.ChangeToken != null)
{
this.settings.ChangeToken.RegisterChangeCallback(this.OnConfigurationReload, null);
}
}
// methods
private void OnConfigurationReload(object state)
{
// The settings object needs to change here, because the old one is probably holding on
// to an old change token.
this.settings = this.settings.Reload();
foreach (var logger in this.loggers.Values)
{
logger.Filter = GetFilter(logger.Name, this.settings);
logger.IncludeScopes = this.settings.IncludeScopes;
}
// The token will change each time it reloads, so we need to register again.
if (this.settings?.ChangeToken != null)
{
this.settings.ChangeToken.RegisterChangeCallback(this.OnConfigurationReload, null);
}
}
private Func <string, LogLevel, bool> GetFilter(string name, ITelnetLoggerSettings settings)
{
if (this.filter != null)
{
return(this.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);
}
public static ILoggerFactory AddTelnet(this ILoggerFactory factory, IServiceProvider serviceProvider, ITelnetLoggerSettings settings)
{
factory.AddProvider(new TelnetLoggerProvider(serviceProvider, settings));
return(factory);
}