private static void CreateNewSource(ref DiagnosticSourceStub diagnosticSource)
{
try
{
DiagnosticSourceStub newDiagSrc = DiagnosticListening.CreateNewSource(DiagnosticEventsSpecification.StubbedSourceName);
diagnosticSource = newDiagSrc;
}
catch (Exception ex)
{
diagnosticSource = DiagnosticSourceStub.NoOpStub;
// If there was some business logic required to handle such errors, it would go here.
ConsoleWrite.Exception(ex);
}
}
private IDisposable SubscribeToAllSources()
{
try
{
return(DiagnosticListening.SubscribeToAllSources(ObserverAdapter.OnAllHandlers(
(DiagnosticListenerStub dl) => OnEventSourceObservered(dl),
(Exception err) => ConsoleWrite.Exception(err), // Just for demo. Error handler is not actually necessary.
() => ConsoleWrite.LineLine($"All-EventSources-Subscription Completed.")))); // Just for demo. Completion handler is not actually necessary.
}
catch (Exception ex)
{
// If there was some business logic required to handle such errors, it would go here.
ConsoleWrite.Exception(ex);
return(null);
}
}
public static void Run()
{
// This demo shows how to use the stub APIs directly, without protecting against dynamic invocation exceptions.
// The corresponding Net Core demo shows one of several possible ways for dealing with such exceptions.
// Other demos show other approaches for dealing with these exceptions.
ConsoleWrite.LineLine($"STARTING DEMO '{nameof(UseDiagnosticSourceStub)}'.");
SetupListening();
ConsoleWrite.LineLine("Starting to create new Diagnostic Sources.");
DiagnosticSourceStub diagnosticSource1 = DiagnosticListening.CreateNewSource("DemoXxx.UseDiagnosticSource.Name1");
DiagnosticSourceStub diagnosticSource2 = DiagnosticListening.CreateNewSource("DemoXxx.UseDiagnosticSource.Name2");
ConsoleWrite.Line("Finished creating new Diagnostic Sources.");
ConsoleWrite.LineLine("Starting to emit DiagnosticSource events.");
for (int i = 0; i < 1000; i++)
{
if (diagnosticSource1.IsEnabled("EventXyzName.A"))
{
diagnosticSource1.Write("EventXyzName", new EventXyzNamePayload("Foo", 42, i));
}
if (diagnosticSource1.IsEnabled("EventXyzName.B", arg1: "Something", arg2: 13.7))
{
diagnosticSource1.Write("EventXyzName", new EventXyzNamePayload("Bar", new[] { 1, 2, 3 }, i));
}
if (diagnosticSource1.IsEnabled("EventXyzName.C", arg1: -1))
{
diagnosticSource1.Write("EventXyzName", new EventXyzNamePayload(null, null, i));
}
diagnosticSource2.Write("EventAbcName", new { Value = "Something", IterationNr = i });
ConsoleWrite.LineLine($"-----------{i}-----------");
}
ConsoleWrite.Line("Finished to emit DiagnosticSource events.");
ConsoleWrite.LineLine($"FINISHED DEMO '{nameof(UseDiagnosticSourceStub)}'.");
}
public static bool SubscribeToAllSourcesSafe(IObserver <DiagnosticListenerStub> diagnosticSourcesObserver, out IDisposable result, out Exception error)
{
try
{
error = null;
result = DiagnosticListening.SubscribeToAllSources(diagnosticSourcesObserver);
return(true);
}
catch (Exception ex)
{
error = ex;
if (s_isLogExceptionsEnabled)
{
Log.Error(s_logComponentMoniker, ex);
}
result = null;
return(false);
}
}
public static bool CreateNewSourceSafe(string diagnosticSourceName, out DiagnosticSourceStub result, out Exception error)
{
try
{
error = null;
result = DiagnosticListening.CreateNewSource(diagnosticSourceName);
return(true);
}
catch (Exception ex)
{
error = ex;
if (s_isLogExceptionsEnabled)
{
Log.Error(s_logComponentMoniker, ex);
}
result = DiagnosticSourceStub.NoOpStub;
return(false);
}
}
public static void Run()
{
ConsoleWrite.LineLine($"STARTING DEMO '{nameof(UseDiagnosticSourceStub)}'.");
SetupListening();
ConsoleWrite.LineLine("Starting to create new Diagnostic Sources.");
DiagnosticSourceStub diagnosticSource1 = DiagnosticListening.CreateNewSource("DemoXxx.UseDiagnosticSource.Name1");
DiagnosticSourceStub diagnosticSource2 = DiagnosticListening.CreateNewSource("DemoXxx.UseDiagnosticSource.Name2");
ConsoleWrite.Line("Finished creating new Diagnostic Sources.");
ConsoleWrite.LineLine("Starting to emit DiagnosticSource events.");
for (int i = 0; i < 1000; i++)
{
if (diagnosticSource1.IsEnabled("EventXyzName.A"))
{
diagnosticSource1.Write("EventXyzName", new EventXyzNamePayload("Foo", 42, i));
}
if (diagnosticSource1.IsEnabled("EventXyzName.B", arg1: "Something", arg2: 13.7))
{
diagnosticSource1.Write("EventXyzName", new EventXyzNamePayload("Bar", new[] { 1, 2, 3 }, i));
}
if (diagnosticSource1.IsEnabled("EventXyzName.C", arg1: -1))
{
diagnosticSource1.Write("EventXyzName", new EventXyzNamePayload(null, null, i));
}
diagnosticSource2.Write("EventAbcName", new { Value = "Something", IterationNr = i });
ConsoleWrite.LineLine($"-----------{i}-----------");
}
ConsoleWrite.Line("Finished to emit DiagnosticSource events.");
ConsoleWrite.LineLine($"FINISHED DEMO '{nameof(UseDiagnosticSourceStub)}'.");
}
