/// <summary> Adds the filtered logger to the ILoggingBuilder.</summary>
/// <param name="builder">The builder.</param>
/// <param name="config"> Use this to add the logging providers you want to filter.</param>
/// <param name="filter"> A function that allows you to examine or transform the logger message before it's sent to a logger implementation.</param>
/// <returns></returns>
public static ILoggingBuilder AddFilteredLogger(this ILoggingBuilder builder,
Action <ILoggingBuilder> config,
FilteringLogger.FilterMessage filter)
{
// Collect the desired logging provider configurations
var hostBuilder = new HostBuilder()
.ConfigureLogging(config);
var host = hostBuilder.Build();
// Find the logging providers from the dependency injection container.
var providers = host.Services.GetServices <ILoggerProvider>();
foreach (var provider in providers)
{
// Create a FilteredLoggerProvider wrapper for each
// provider registered.
var genericType = typeof(FilteringLoggerProvider <>);
Type[] typeArgs = { provider.GetType() };
var finalType = genericType.MakeGenericType(typeArgs);
var finalProvider = (ILoggerProvider)Activator.CreateInstance(finalType, provider, filter);
builder.Services.AddSingleton(finalProvider);
}
return(builder);
}
public FilteringLoggerProvider(ILoggerProvider providerToFilter, FilteringLogger.FilterMessage filter)
{
_providerToFilter = providerToFilter;
_filter = filter;
}
