SerilogFactory 不记录我的消息，但它记录异常

Question

我想使用SerilogFactory，LogFactory在初始化AppHost之前被初始化。这是我的 startup.cs :

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    public void ConfigureServices(IServiceCollection services)
    {
    }

    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        var logger = new LoggerConfiguration().WriteTo.File("log.txt").CreateLogger();
        LogManager.LogFactory = new SerilogFactory(logger);

        app.Map("/api", api =>
        {
            api.UseServiceStack(new AppHost(env.ApplicationName, Configuration));
        });
   }
}

这是我的示例服务：

public class TestService : ServiceStack.Service
{
    public static ILog Log = LogManager.GetLogger(typeof(TestService));

    public bool Get(GetTest request)
    {
        Log.Info("foo");
        Log.Warn("???");

        throw new System.Exception("plop");

        return true;
    }
}

调用 "GetTest" 请求后，我可以在我的 "log.txt" 文件中看到异常的详细信息，但我看不到信息 "foo" 或 Warm“?? ？”在文件中。

2019-07-03 18:07:55.597 +02:00 [INF] Initializing Application Tmpi.PocketTournee took 352.2006ms. No errors detected.
2019-07-03 18:08:07.446 +02:00 [ERR] ServiceBase<TRequest>::Service Exception
System.Exception: plop
at Tmpi.PocketTournee.ServiceInterface.TestService.Get(GetTest request) in C:\Projects\VS2017\PocketTournee\WebService\Sources\Tmpi.PocketTournee.ServiceInterface\TestService.cs:line 15

如果我在初始化 AppHost 之后初始化 LogFactory，我可以看到我自己的日志，但是这次异常详细信息和服务堆栈初始化信息已经消失了：

2019-07-03 18:25:05.420 +02:00 [INF] foo
2019-07-03 18:25:05.434 +02:00 [WRN] ???

Answer 1

所以我设置了一些断点来观察 LogManager.LogFactory 的类型：
在注册第一个 LogFactory 之前 LogManager.LogFactory 的类型是 ServiceStack.Logging.NullLogFactory
*注册第一个LogFactory后LogManager.LogFactory的类型当然是ServiceStack.Logging.Serilog.SerilogFactory这里没问题
*但在 AppHost 初始化后 LogManager.LogFactory 的类型恢复为 ServiceStack.NetCore.NetCoreLogFactory

就像这段代码：

        var logFactory = new SerilogFactory(new LoggerConfiguration()
            .WriteTo.File("log.txt")
            .CreateLogger());

// Here LogManager.LogFactory is {ServiceStack.Logging.NullLogFactory}

        LogManager.LogFactory = logFactory;

// Here LogManager.LogFactory is {ServiceStack.Logging.Serilog.SerilogFactory}

        app.Map("/api", api =>
        {
            api.UseServiceStack(new AppHost(env.ApplicationName, Configuration));
        });

// Here LogManager.LogFactory is {ServiceStack.NetCore.NetCoreLogFactory}

        LogManager.LogFactory = logFactory;

SerilogFactory 不记录我的消息，但它记录异常

SerilogFactory don't log my messages but it logs exceptions

servicestack

serilog