public async Task Trace_Header()
{
string traceId = _traceIdFactory.NextId();
ulong spanId = _spanIdFactory.NextId();
var uri = $"/Trace/{nameof(TraceController.Trace)}/{_testId}";
var childSpanName = EntryData.GetMessage(nameof(TraceController.Trace), _testId);
using (var server = new TestServer(new WebHostBuilder().UseStartup <TraceTestNoBufferLowQpsApplication>()))
using (var client = server.CreateClient())
{
var header = TraceHeaderContext.Create(traceId, spanId, shouldTrace: true);
client.DefaultRequestHeaders.Add(TraceHeaderContext.TraceHeader, header.ToString());
var response = await client.GetAsync(uri);
var trace = _polling.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, childSpanName);
Assert.Equal(traceId, trace.TraceId);
var parentSpan = trace.Spans.First(s => s.Name == uri);
Assert.Equal(spanId, parentSpan.ParentSpanId);
Assert.True(response.Headers.Contains(TraceHeaderContext.TraceHeader));
var returnedHeader = response.Headers.GetValues(TraceHeaderContext.TraceHeader).Single();
var headerContext = TraceHeaderContext.FromHeader(returnedHeader);
Assert.Equal(traceId, headerContext.TraceId);
Assert.Equal(spanId, headerContext.SpanId);
Assert.True(headerContext.ShouldTrace);
}
}
public async Task Trace_Header(
Action <IWebHostBuilder> testServerConfigurator,
Action <HttpRequestHeaders, string, ulong?, bool?> traceContextEmitter,
Action <HttpResponseMessage, string, ulong?, bool?> assertTraceContext)
{
string traceId = _traceIdFactory.NextId();
ulong spanId = _spanIdFactory.NextId();
var uri = $"/Trace/{nameof(TraceController.Trace)}/{_testId}";
var childSpanName = EntryData.GetMessage(nameof(TraceController.Trace), _testId);
using var server = GetTestServer <TraceTestNoBufferLowQpsApplication>(testServerConfigurator);
using var client = server.CreateClient();
traceContextEmitter(client.DefaultRequestHeaders, traceId, spanId, true);
var response = await client.GetAsync(uri);
var trace = _polling.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, childSpanName);
Assert.Equal(traceId, trace.TraceId);
var parentSpan = trace.Spans.First(s => s.Name == uri);
Assert.Equal(spanId, parentSpan.ParentSpanId);
assertTraceContext(response, traceId, spanId, true);
}
public async Task Traces_Outgoing()
{
var uri = $"/TraceSamples/{nameof(TraceSamplesController.TraceOutgoing)}/{_testId}";
var response = await _client.GetAsync(uri);
var trace = s_polling.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, "https://weather.com/");
TraceEntryVerifiers.AssertSpanLabelsContains(
trace.Spans.First(s => s.Name == uri), TraceEntryData.HttpGetSuccessLabels);
Assert.False(response.Headers.Contains(TraceHeaderContext.TraceHeader));
}
public async Task Traces_Block()
{
var uri = $"/TraceSamples/{nameof(TraceSamplesController.TraceHelloWorld)}/{_testId}";
var response = await _client.GetAsync(uri);
var trace = s_tracePolling.GetTrace(uri, Timestamp.FromDateTime(_startTime));
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, _testId);
TraceEntryVerifiers.AssertSpanLabelsContains(
trace.Spans.First(s => s.Name == uri), TraceEntryData.HttpGetSuccessLabels);
Assert.False(response.Headers.Contains(TraceHeaderContext.TraceHeader));
}
public async Task Traces_MethodInjection()
{
var uri = $"/TraceSamplesMethod/{nameof(TraceSamplesMethodController.TraceHelloWorld)}/{_testId}";
var response = await _client.GetAsync(uri);
var trace = TraceEntryPolling.Default.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, _testId);
TraceEntryVerifiers.AssertSpanLabelsContains(
trace.Spans.First(s => s.Name == uri), TraceEntryData.HttpGetSuccessLabels);
Assert.False(response.Headers.Contains(TraceHeaderContext.TraceHeader));
}
public async Task Traces_Outgoing()
{
Skip.If(TestEnvironment.IsWindows(), "https://github.com/googleapis/google-cloud-dotnet/issues/5425");
var uri = $"/TraceSamples/{nameof(TraceSamplesController.TraceOutgoing)}/{_testId}";
var response = await _client.GetAsync(uri);
var trace = s_polling.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, "https://weather.com/");
TraceEntryVerifiers.AssertSpanLabelsContains(
trace.Spans.First(s => s.Name == uri), TraceEntryData.HttpGetSuccessLabels);
Assert.False(response.Headers.Contains(TraceHeaderContext.TraceHeader));
}
public async Task Trace_OutGoing(string methodName)
{
var uri = $"/Trace/{methodName}/{_testId}";
var childSpanName = EntryData.GetMessage(methodName, _testId);
var outgoingSpanName = "https://google.com/";
using var server = GetTestServer <TraceTestNoBufferHighQpsApplication>();
using var client = server.CreateClient();
await client.GetAsync(uri);
var trace = _polling.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, childSpanName, outgoingSpanName);
}
public async Task Trace_OutGoingClientFactory(Action <IWebHostBuilder> testServerConfigurator)
{
var uri = $"/Trace/{nameof(TraceController.TraceOutgoingClientFactory)}/{_testId}";
var childSpanName = EntryData.GetMessage(nameof(TraceController.TraceOutgoingClientFactory), _testId);
var outgoingSpanName = "https://google.com/";
using var server = GetTestServer <TraceTestNoBufferHighQpsApplication>(testServerConfigurator);
using var client = server.CreateClient();
await client.GetAsync(uri);
var trace = _polling.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, childSpanName, outgoingSpanName);
}
public async Task Traces_OutgoingClientFactory()
{
var uri = $"/TraceSamples/{nameof(TraceSamplesController.TraceOutgoingClientFactory)}/{_testId}";
using var server = GetTestServer <TraceClientFactoryTestApplication.Startup>();
using var client = server.CreateClient();
var response = await client.GetAsync(uri);
var trace = s_polling.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, "http://weather.com/");
TraceEntryVerifiers.AssertSpanLabelsContains(
trace.Spans.First(s => s.Name == uri), TraceEntryData.HttpGetSuccessLabels);
Assert.False(response.Headers.Contains(TraceHeaderContext.TraceHeader));
}
public async Task Trace_Exception(Action <IWebHostBuilder> testServerConfigurator)
{
var uri = $"/Trace/{nameof(TraceController.ThrowException)}/{_testId}";
var childSpanName = EntryData.GetMessage(nameof(TraceController.ThrowException), _testId);
using var server = GetTestServer <TraceTestNoBufferHighQpsApplication>(testServerConfigurator);
using var client = server.CreateClient();
await Assert.ThrowsAnyAsync <Exception>(() => client.GetAsync(uri));
var trace = _polling.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, childSpanName);
TraceEntryVerifiers.AssertContainsStackTrace(trace.Spans.First(s => s.Name == uri),
nameof(TraceController), nameof(TraceController.ThrowException));
}
private static async Task TestTrace(string testId, DateTimeOffset startTime, HttpClient client)
{
var uri = $"/Trace/{nameof(TraceController.Trace)}/{testId}";
var childSpanName = EntryData.GetMessage(nameof(TraceController.Trace), testId);
var response = await client.GetAsync(uri);
var trace = TraceEntryPolling.Default.GetTrace(uri, startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, childSpanName);
TraceEntryVerifiers.AssertSpanLabelsContains(
trace.Spans.First(s => s.Name == uri), TraceEntryData.HttpGetSuccessLabels);
Assert.False(response.Headers.Contains(TraceHeaderContext.TraceHeader));
}
public async Task Trace_OutGoing()
{
// We don't test custom trace context with TraceHeaderPropagatingHandler because it's
// pre IHttpClientFactory and has associated lifetime issues.
var uri = $"/Trace/{nameof(TraceController.TraceOutgoing)}/{_testId}";
var childSpanName = EntryData.GetMessage(nameof(TraceController.TraceOutgoing), _testId);
var outgoingSpanName = "https://google.com/";
using var server = GetTestServer <TraceTestNoBufferHighQpsApplication>();
using var client = server.CreateClient();
await client.GetAsync(uri);
var trace = _polling.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, childSpanName, outgoingSpanName);
}
public async Task Trace_WebServerHosted_Outgoing()
{
var service = $"/api/Trace/TraceOutgoing/{_testId}";
var childSpanName = EntryData.GetMessage("TraceOutgoing", _testId);
var outgoingSpanName = "https://google.com/";
using (HttpClient httpClient = new HttpClient())
{
httpClient.BaseAddress = PublishedServiceBaseAddress;
await httpClient.GetAsync(service);
}
var trace = _polling.GetTrace(service, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, service, childSpanName, outgoingSpanName);
}
public async Task Trace_StackTrace()
{
var uri = $"/Trace/{nameof(TraceController.TraceStackTrace)}/{_testId}";
var childSpanName = EntryData.GetMessage(nameof(TraceController.TraceStackTrace), _testId);
using var server = GetTestServer <TraceTestNoBufferHighQpsApplication>();
using var client = server.CreateClient();
await client.GetAsync(uri);
var trace = _polling.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, childSpanName);
TraceEntryVerifiers.AssertContainsStackTrace(trace.Spans.First(s => s.Name == childSpanName),
nameof(TraceController), nameof(TraceController.TraceStackTrace),
nameof(TraceEntryData), nameof(TraceEntryData.CreateStackTrace));
}
public async Task TraceIncomingAsync()
{
IHost host = null;
// Hides that we use different classes so that we can have multiple CreateHostBuilder methods.
Func <IHostBuilder> CreateHostBuilder = DefaultHostBuilder.CreateHostBuilder;
try
{
// Sample: Start
host = CreateHostBuilder().Build();
await host.StartAsync();
// End sample
object request = null;
// Sample: IncomingContext
ITraceContext traceContext = GetTraceContextFromIncomingRequest(request);
var tracerFactory = host.Services.GetRequiredService <Func <ITraceContext, IManagedTracer> >();
IManagedTracer tracer = tracerFactory(traceContext);
ContextTracerManager.SetCurrentTracer(tracer);
// End sample
// Let's just start a span with the test ID so we can find it faster.
// But we don't show this in sample code.
using (tracer.StartSpan(_testId))
{
// Sample: Trace
IManagedTracer currentTracer = host.Services.GetRequiredService <IManagedTracer>();
using (currentTracer.StartSpan("testing_tracing"))
{
Console.WriteLine("Using Cloud Trace from a non ASP.NET Core app");
}
// End sample
}
var trace = TraceEntryPolling.Default.GetTrace(_testId, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, _testId, "testing_tracing");
Assert.Equal(traceContext.TraceId, trace.TraceId);
}
finally
{
if (host is object)
{
await host.StopAsync();
}
}
}
public async Task Trace(Action <IWebHostBuilder> testServerConfigurator)
{
var uri = $"/Trace/{nameof(TraceController.Trace)}/{_testId}";
var childSpanName = EntryData.GetMessage(nameof(TraceController.Trace), _testId);
using var server = GetTestServer <TraceTestNoBufferHighQpsApplication>(testServerConfigurator);
using var client = server.CreateClient();
var response = await client.GetAsync(uri);
var trace = _polling.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, childSpanName);
TraceEntryVerifiers.AssertSpanLabelsContains(
trace.Spans.First(s => s.Name == uri), TraceEntryData.HttpGetSuccessLabels);
AssertNoTraceHeaders(response);
}
public async Task TraceAsync()
{
// Naming it like an instance variable so that it looks like that on sample code.
IHost _host = null;
try
{
// Sample: Start
_host = CreateHostBuilder().Build();
await _host.StartAsync();
// End sample
// Sample: IncomingContext
ITraceContext traceContext = GetTraceContextFromIncomingRequest();
var tracerFactory = _host.Services.GetRequiredService <Func <ITraceContext, IManagedTracer> >();
IManagedTracer tracer = tracerFactory(traceContext);
ContextTracerManager.SetCurrentTracer(tracer);
// End sample
// Let's just start a span with the test ID so we can find it faster.
// But we don't show this in sample code.
using (tracer.StartSpan(_testId))
{
// Sample: Trace
IManagedTracer currentTracer = _host.Services.GetRequiredService <IManagedTracer>();
using (currentTracer.StartSpan("standalone_tracing"))
{
Console.WriteLine("Using Cloud Trace from a non ASP.NET Core app");
}
// End sample
}
var trace = s_polling.GetTrace(_testId, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, _testId, "standalone_tracing");
Assert.Equal(traceContext.TraceId, trace.TraceId);
}
finally
{
if (_host != null)
{
await _host.StopAsync();
}
}
}
public async Task Trace_Label(Action <IWebHostBuilder> testServerConfigurator)
{
var uri = $"/Trace/{nameof(TraceController.TraceLabels)}/{_testId}";
var childSpanName = EntryData.GetMessage(nameof(TraceController.TraceLabels), _testId);
using var server = GetTestServer <TraceTestNoBufferHighQpsApplication>(testServerConfigurator);
using var client = server.CreateClient();
await client.GetAsync(uri);
var trace = _polling.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, childSpanName);
TraceEntryVerifiers.AssertSpanLabelsContains(trace.Spans.First(s => s.Name == childSpanName),
new Dictionary <string, string>
{
{ TraceEntryData.TraceLabel, TraceEntryData.TraceLabelValue }
});
}
public async Task Trace_WebServerHosted_StackTrace()
{
var service = $"/api/Trace/TraceStackTrace/{_testId}";
var childSpanName = EntryData.GetMessage("TraceStackTrace", _testId);
using (HttpClient httpClient = new HttpClient())
{
httpClient.BaseAddress = PublishedServiceBaseAddress;
await httpClient.GetAsync(service);
}
var trace = _polling.GetTrace(service, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, service, childSpanName);
TraceEntryVerifiers.AssertContainsStackTrace(trace.Spans.First(s => s.Name == childSpanName),
"TraceController", "TraceStackTrace",
nameof(TraceEntryData), nameof(TraceEntryData.CreateStackTrace));
}
public async Task Trace_DummyNameProvider(Action <IWebHostBuilder> testServerConfigurator)
{
var uri = $"/Trace/{nameof(TraceController.Trace)}/{_testId}";
// our dummy provider prefixes with /Dummy
var expectedTraceName = $"/Dummy{uri}";
var childSpanName = EntryData.GetMessage(nameof(TraceController.Trace), _testId);
using var server = GetTestServer <TraceTestCustomNameProviderNoBufferHighQpsApplication>(testServerConfigurator);
using var client = server.CreateClient();
var response = await client.GetAsync(uri);
var trace = _polling.GetTrace(expectedTraceName, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, expectedTraceName, childSpanName);
TraceEntryVerifiers.AssertSpanLabelsContains(
trace.Spans.First(s => s.Name == expectedTraceName), TraceEntryData.HttpGetSuccessLabels);
AssertNoTraceHeaders(response);
}
public async Task Trace()
{
var uri = $"/Trace/{nameof(TraceController.Trace)}/{_testId}";
var childSpanName = EntryData.GetMessage(nameof(TraceController.Trace), _testId);
using (var server = new TestServer(new WebHostBuilder().UseStartup <TraceTestNoBufferHighQpsApplication>()))
using (var client = server.CreateClient())
{
var response = await client.GetAsync(uri);
var trace = _polling.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, childSpanName);
TraceEntryVerifiers.AssertSpanLabelsContains(
trace.Spans.First(s => s.Name == uri), TraceEntryData.HttpGetSuccessLabels);
Assert.False(response.Headers.Contains(TraceHeaderContext.TraceHeader));
}
}
private static async Task TestTrace(string testId, DateTime startTime, HttpClient client)
{
var uri = $"/Trace/{nameof(TraceController.Trace)}/{testId}";
var childSpanName = EntryData.GetMessage(nameof(TraceController.Trace), testId);
var response = await client.GetAsync(uri);
// Give the polling a little extra time to find the trace as
// trace processing can sometimes take time and the default buffer is a
// timed buffer.
var polling = new TraceEntryPolling(TimeSpan.FromSeconds(20));
var trace = polling.GetTrace(uri, Timestamp.FromDateTime(startTime));
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, childSpanName);
TraceEntryVerifiers.AssertSpanLabelsContains(
trace.Spans.First(s => s.Name == uri), TraceEntryData.HttpGetSuccessLabels);
Assert.False(response.Headers.Contains(TraceHeaderContext.TraceHeader));
}
public async Task Trace_OutGoingClientFactory_WithLabels(Action <IWebHostBuilder> testServerConfigurator)
{
var uri = $"/Trace/{nameof(TraceController.TraceOutgoingClientFactoryWithLabels)}/{_testId}";
var childSpanName = EntryData.GetMessage(nameof(TraceController.TraceOutgoingClientFactory), _testId);
var outgoingSpanName = "https://google.com/";
using var server = GetTestServer <TraceTestNoBufferHighQpsApplication>(builder =>
{
testServerConfigurator?.Invoke(builder);
builder.ConfigureServices(services => services
.AddHttpClient("outgoing_with_labels", c => c.BaseAddress = new Uri("https://google.com/"))
.AddOutgoingGoogleTraceHandler(sp => _customLabels));
});
using var client = server.CreateClient();
await client.GetAsync(uri);
var trace = TraceEntryPolling.Default.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, childSpanName, outgoingSpanName);
TraceEntryVerifiers.AssertSpanLabelsContains(trace.Spans.First(span => span.Name == outgoingSpanName), _customLabels);
}
public async Task Trace_OutGoing()
{
// We don't test custom trace context with TraceHeaderPropagatingHandler because it's
// pre IHttpClientFactory and has associated lifetime issues.
var uri = $"/Trace/{nameof(TraceController.TraceOutgoing)}/{_testId}";
var childSpanName = EntryData.GetMessage(nameof(TraceController.TraceOutgoing), _testId);
var outgoingSpanName = "https://google.com/";
using var server = GetTestServer <TraceTestNoBufferHighQpsApplication>(
builder => builder.ConfigureServices(
services => services.TryAddSingleton(
#pragma warning disable CS0618 // Type or member is obsolete
new TraceHeaderPropagatingHandler(ContextTracerManager.GetCurrentTracer))));
#pragma warning restore CS0618 // Type or member is obsolete
using var client = server.CreateClient();
await client.GetAsync(uri);
var trace = TraceEntryPolling.Default.GetTrace(uri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, uri, childSpanName, outgoingSpanName);
}
public async Task Trace_TraceFallbackPredicate(Action <IWebHostBuilder> testServerConfigurator)
{
var tracedId = $"fallback{_testId}";
var tracedUri = $"/Trace/{nameof(TraceController.Trace)}/{tracedId}";
var tracedChildSpanName = EntryData.GetMessage(nameof(TraceController.Trace), tracedId);
var nonTracedUri = $"/Trace/{nameof(TraceController.Trace)}/{_testId}";
using var server = GetTestServer <TraceTestFallbackPredicate>(testServerConfigurator);
using var client = server.CreateClient();
var nonTracedTask = client.GetAsync(nonTracedUri);
var tracedTask = client.GetAsync(tracedUri);
await Task.WhenAll(nonTracedTask, tracedTask);
Assert.Null(TraceEntryPolling.NoEntry.GetTrace(nonTracedUri, _startTime, expectTrace: false));
var trace = TraceEntryPolling.Default.GetTrace(tracedUri, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, tracedUri, tracedChildSpanName);
TraceEntryVerifiers.AssertSpanLabelsContains(
trace.Spans.First(s => s.Name == tracedUri), TraceEntryData.HttpGetSuccessLabels);
}
public async Task Trace_WebServerHosted()
{
var service = $"/api/Trace/Trace/{_testId}";
var childSpanName = EntryData.GetMessage("Trace", _testId);
HttpResponseMessage response;
using (HttpClient httpClient = new HttpClient())
{
httpClient.BaseAddress = PublishedServiceBaseAddress;
response = await httpClient.GetAsync(service);
}
var trace = _polling.GetTrace(service, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, service, childSpanName);
TraceEntryVerifiers.AssertSpanLabelsContains(
trace.Spans.First(s => s.Name == service), TraceEntryData.HttpGetSuccessLabels);
Assert.False(response.Headers.Contains(TraceHeaderContext.TraceHeader));
}
public async Task Trace_WebServerHosted_Label()
{
var service = $"/api/Trace/TraceLabels/{_testId}";
var childSpanName = EntryData.GetMessage("TraceLabels", _testId);
using (HttpClient httpClient = new HttpClient())
{
httpClient.BaseAddress = PublishedServiceBaseAddress;
await httpClient.GetAsync(service);
}
var trace = _polling.GetTrace(service, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, service, childSpanName);
TraceEntryVerifiers.AssertSpanLabelsContains(
trace.Spans.First(s => s.Name == childSpanName),
new Dictionary <string, string>
{
{ TraceEntryData.TraceLabel, TraceEntryData.TraceLabelValue }
});
}
public async Task TraceSingleAsync()
{
IHost host = null;
try
{
host = TroubleshootingHostBuilder.CreateHostBuilder().Build();
await host.StartAsync();
// Sample: SingleContext
ITraceContext traceContext = new SimpleTraceContext(null, null, true);
var tracerFactory = host.Services.GetRequiredService <Func <ITraceContext, IManagedTracer> >();
IManagedTracer tracer = tracerFactory(traceContext);
ContextTracerManager.SetCurrentTracer(tracer);
// End sample
// Let's just start a span with the test ID so we can find it faster.
// But we don't show this in sample code.
using (tracer.StartSpan(_testId))
{
// Sample: RunIn
IManagedTracer currentTracer = host.Services.GetRequiredService <IManagedTracer>();
currentTracer.RunInSpan(
() => Console.WriteLine("Using Cloud Trace from a non ASP.NET Core app"),
"testing_tracing");
// End sample
}
var trace = TraceEntryPolling.Default.GetTrace(_testId, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, _testId, "testing_tracing");
}
finally
{
if (host is object)
{
await host.StopAsync();
}
}
}
public async Task TraceOutgoingAsync()
{
IHost host = null;
try
{
host = OutgoingHostBuilder.CreateHostBuilder().Build();
await host.StartAsync();
ITraceContext traceContext = new SimpleTraceContext(null, null, true);
var tracerFactory = host.Services.GetRequiredService <Func <ITraceContext, IManagedTracer> >();
IManagedTracer tracer = tracerFactory(traceContext);
ContextTracerManager.SetCurrentTracer(tracer);
// Let's just start a span with the test ID so we can find it faster.
// But we don't show this in sample code.
using (tracer.StartSpan(_testId))
{
// Sample: TraceOutgoingClientFactory
IHttpClientFactory clientFactory = host.Services.GetRequiredService <IHttpClientFactory>();
var httpClient = clientFactory.CreateClient("tracesOutgoing");
// Any code that makes outgoing requests.
var response = await httpClient.GetAsync("http://weather.com/");
// End sample
}
var trace = TraceEntryPolling.Default.GetTrace(_testId, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, _testId, "http://weather.com/");
}
finally
{
if (host is object)
{
await host.StopAsync();
}
}
}
public async Task TraceSingleAsync()
{
IHost host = null;
// Hides that we use different classes so that we can have multiple CreateHostBuilder methods.
Func <IHostBuilder> CreateHostBuilder = DefaultHostBuilder.CreateHostBuilder;
try
{
// Sample: Start
host = CreateHostBuilder().Build();
await host.StartAsync();
// End sample
ITraceContext traceContext = new SimpleTraceContext(null, null, true);
var tracerFactory = host.Services.GetRequiredService <Func <ITraceContext, IManagedTracer> >();
IManagedTracer tracer = tracerFactory(traceContext);
ContextTracerManager.SetCurrentTracer(tracer);
using (tracer.StartSpan(_testId))
{
IManagedTracer currentTracer = host.Services.GetRequiredService <IManagedTracer>();
currentTracer.RunInSpan(
() => Console.WriteLine("Using Cloud Trace from a non ASP.NET Core app"),
"testing_tracing");
}
var trace = TraceEntryPolling.Default.GetTrace(_testId, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, _testId, "testing_tracing");
}
finally
{
if (host is object)
{
await host.StopAsync();
}
}
}