Separate log file for separate thread using serilog

Question

I have a .Net Worker Service app which has multiple threads. I want to log each thread into separate file to make it easier to read the logs. Any ideas to implement this?

Answer 1

A common way of deciding which sink to write to at run-time is to use the Serilog.Sinks.Map:

Log.Logger = new LoggerConfiguration()
    .WriteTo.Map(_ => Thread.CurrentThread.ManagedThreadId,
        (threadId, wt) => wt.File($"log-{threadId}.log"))
.CreateLogger();

Log.Information("Hello from the main thread");

var task1 = Task.Run(() => Log.Information("Hello from thread X"));
var task2 = Task.Run(() => Log.Information("Hello from thread Y"));

Task.WaitAll(task1, task2);

Log.CloseAndFlush();

You should consider limiting the number of open sinks when using this approach.