Logger configuration

[Nicolas Tenoutasse]

Hi,

How do you do when you want to enrich your logging for a long time but not from the start?

Of course if you want to do it from the beginning, you can do it from the logger configuration

Log.Logger = new LoggerConfiguration()

                  .Enrich.WithProperty("App", APP_NAME)

                  .WriteTo.Seq("http://localhost:5341")

                  .CreateLogger();

And if you want to do it in a method, you have a few options lthat you have described for example in

http://stackoverflow.com/questions/32974560/serilog-additional-properties/32987759#32987759

But what if you want to do it for a certain period of time (that you don't know of course)

I found 2 ways, both a bit strange but for sure, the first one is really convoluted

You can recreate a Logger and make the new one points to the old one, something like:

Log.Logger = new LoggerConfiguration()

                  .Enrich.WithProperty("Shift", 2)

                  .WriteTo.Logger(Log.Logger)

                  .CreateLogger();

Or you can do something a bit less drastic by

Log.Logger = Log.Logger.ForContext("Shift", 2);

I noticed that serilog is clever enough to change the value of the property when there is already a property with the same name.

But still I wonder if there is a better way to do it?

Regards,

Nicolas

[nblum...@nblumhardt.com]

Hi Nicolas,

This is a good scenario for a custom ILogEventEnricher. If you implement this interface, you can plug the resulting object into the logging pipeline using Enrich.With(enricher), and keep a reference to your enricher to turn enrichment on/off if necessary.

Let me know if you need more details.

Regards,

Nick