public static IServiceCollection AddJaeger(this IServiceCollection services)
{
if (_initialized)
{
return(services);
}
_initialized = true;
var options = new JaegerOptions();
options.Sampler = "const";
options.Enabled = true;
options.UdpHost = "localhost";
options.UdpPort = 6831;
options.ServiceName = "Test Jaeger";
options.MaxPacketSize = 0;
if (!options.Enabled)
{
var defaultTracer = new Tracer.Builder(Assembly.GetEntryAssembly().FullName)
.WithReporter(new NoopReporter())
.WithSampler(new ConstSampler(false))
.Build();
services.AddSingleton <ITracer>(defaultTracer);
return(services);
}
services.AddSingleton <ITracer>(sp =>
{
var loggerFactory = sp.GetRequiredService <ILoggerFactory>();
var reporter = new RemoteReporter.Builder()
.WithSender(new UdpSender(options.UdpHost, options.UdpPort, options.MaxPacketSize))
.WithLoggerFactory(loggerFactory)
.Build();
var sampler = GetSampler(options);
var tracer = new Tracer.Builder(options.ServiceName)
.WithReporter(reporter)
.WithSampler(sampler)
.Build();
GlobalTracer.Register(tracer);
return(tracer);
});
services.AddOpenTracing();
return(services);
}
private static ISampler GetSampler(JaegerOptions options)
{
switch (options.Sampler)
{
case "rate":
return(new RateLimitingSampler(options.MaxTracesPerSecond));
case "probabilistic":
return(new ProbabilisticSampler(options.SamplingRate));
default:
return(new ConstSampler(true));
}
}
