private static void SetupListening()
{
ConsoleWrite.LineLine("Starting setting up DiagnosticSource listening.");
IDisposable listenerSubscription = DiagnosticListening.SubscribeToAllSources(ObserverAdapter.OnNextHandler(
(DiagnosticListenerStub diagnosticListener) =>
{
ConsoleWrite.Line($"Subscriber called: diagnosticSourceObserver(diagnosticListener.Name: \"{diagnosticListener.Name}\")");
if (diagnosticListener.Name.Equals("DemoXxx.UseDiagnosticSource.Name1", StringComparison.Ordinal))
{
IDisposable eventSubscription = diagnosticListener.SubscribeToEvents(
ObserverAdapter.OnNextHandler((KeyValuePair <string, object> eventInfo) =>
{
ConsoleWrite.Line($"Event Handler called: eventObserver(eventName: \"{eventInfo.Key}\", payloadValue: {(eventInfo.Value ?? "<null>")})");
}),
(string eventName, object arg1, object arg2) =>
{
Validate.NotNull(eventName, nameof(eventName));
bool res = eventName.StartsWith("EventXyzName", StringComparison.OrdinalIgnoreCase) &&
(arg1 == null || !(arg1 is Int32 arg1Val) || arg1Val >= 0);
ConsoleWrite.Line($"Filter called: isEventEnabledFilter(eventName: \"{eventName}\", arg1: {(arg1 ?? "<null>")}, arg2: {(arg2 ?? "<null>")})."
+ $" Returning: {res}.");
return(res);
});
}
}));
ConsoleWrite.Line("Finished setting up DiagnosticSource listening.");
}
private static void SetupListening()
{
ConsoleWrite.LineLine("Starting setting up DiagnosticSource listening.");
IDisposable listenerSubscription = DiagnosticListener.AllListeners.Subscribe(ObserverAdapter.OnNextHandler(
(DiagnosticListener diagLstnr) =>
{
// This lambda looks at ALL Diagnostic Listeners (aka Sources),
// picks the one it is inderested in and subscibes to that particular Source.
ConsoleWrite.Line($"Subscriber called: OnNext(diagLstnr.Name: \"{diagLstnr.Name}\")");
if (diagLstnr.Name.Equals("DemoXxx.UseDiagnosticSource.Name1", StringComparison.Ordinal))
{
IDisposable eventSubscription = diagLstnr.Subscribe(ObserverAdapter.OnNextHandler(
(KeyValuePair <string, object> eventInfo) =>
{
ConsoleWrite.Line($"Event Handler called: OnNext(eventInfo.Key: \"{eventInfo.Key}\", eventInfo.Value: {(eventInfo.Value ?? "<null>")})");
}),
(name, arg1, arg2) =>
{
Validate.NotNull(name, nameof(name));
bool res = name.StartsWith("EventXyzName", StringComparison.OrdinalIgnoreCase) &&
(arg1 == null || !(arg1 is Int32 arg1Val) || arg1Val >= 0);
ConsoleWrite.Line($"Filter called: IsEnabled(name: \"{name}\", arg1: {(arg1 ?? "<null>")}, arg2: {(arg2 ?? "<null>")})."
+ $" Returning: {res}.");
return(res);
});
}
}));
ConsoleWrite.Line("Finished setting up DiagnosticSource listening.");
}
// This demo shows how to use the stub APIs directly, without protecting against dynamic invocation exceptions.
// The corresponding Net Core demo shows one of several possible ways for dealing with such exceptions.
// Other demos show other approaches for dealing with these exceptions.
public static void Main(string[] _)
{
ConsoleWrite.Line(typeof(Program).FullName);
UseDiagnosticSourceStub.Run();
ConsoleWrite.Line("Done. Press enter.");
Console.ReadLine();
}
public static void Run()
{
// This demo shows one of several possible ways for dealing with dynamic invocation exceptions.
// The corresponding Net Fx demo shows how to use the APIs directly.
// Other demos show other approaches for dealing with these exceptions.
ConsoleWrite.LineLine($"STARTING DEMO '{nameof(UseDiagnosticSourceStub)}'.");
SetupListening();
DiagnosticSourceSafeExtensions.Configure.LogComponentMoniker = "Demo.Slimple.NetCore31";
DiagnosticSourceSafeExtensions.Configure.IsLogExceptionsEnabled = true;
ConsoleWrite.LineLine("Starting to create new Diagnostic Sources.");
if (!DiagnosticSourceSafeExtensions.CreateNewSourceSafe("DemoXxx.UseDiagnosticSource.Name1", out DiagnosticSourceStub diagnosticSource1, out _))
{
ConsoleWrite.Line("Cannot create DiagnosticSource. Error was logged. Bailing out.");
return;
}
if (!DiagnosticSourceSafeExtensions.CreateNewSourceSafe("DemoXxx.UseDiagnosticSource.Name2", out DiagnosticSourceStub diagnosticSource2, out _))
{
ConsoleWrite.Line("Cannot create DiagnosticSource. Error was logged. Bailing out.");
return;
}
ConsoleWrite.Line("Finished creating new Diagnostic Sources.");
ConsoleWrite.LineLine("Starting to emit DiagnosticSource events.");
for (int i = 0; i < 1000; i++)
{
if (diagnosticSource1.IsEnabledSafe("EventXyzName.A", out bool isEventEnabled, out _) && isEventEnabled)
{
diagnosticSource1.WriteSafe("EventXyzName", new EventXyzNamePayload("Foo", 42, i), out _);
}
if (diagnosticSource1.IsEnabledSafe("EventXyzName.B", arg1: "Something", arg2: 13.7, out isEventEnabled, out _) && isEventEnabled)
{
diagnosticSource1.WriteSafe("EventXyzName", new EventXyzNamePayload("Bar", new[] { 1, 2, 3 }, i), out _);
}
if (diagnosticSource1.IsEnabledSafe("EventXyzName.C", arg1: -1, out isEventEnabled, out _) && isEventEnabled)
{
diagnosticSource1.WriteSafe("EventXyzName", new EventXyzNamePayload(null, null, i), out _);
}
diagnosticSource2.WriteSafe("EventAbcName", new { Value = "Something", IterationNr = i }, out _);
ConsoleWrite.LineLine($"-----------{i}-----------");
}
ConsoleWrite.Line("Finished to emit DiagnosticSource events.");
ConsoleWrite.LineLine($"FINISHED DEMO '{nameof(UseDiagnosticSourceStub)}'.");
}
private async Task Plugin()
{
//const string DSAssemblyNameForPlugin = "System.Diagnostics.DiagnosticSource, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51";
const string DSAssemblyFileForPlugin = "PluginRessource.System.Diagnostics.DiagnosticSource.dll";
const int RunningTimeMillis = 500;
string currentDirectory = Directory.GetCurrentDirectory();
string assemblyPath = Path.Combine(currentDirectory, DSAssemblyFileForPlugin);
ConsoleWrite.LineLine($"Mock Plug-In: Loading assembly from \"{assemblyPath}\".");
var asmLoadCtx = new MockPluginAssemblyLoadContext();
Assembly dsAsm = asmLoadCtx.LoadFromAssemblyPath(assemblyPath);
ConsoleWrite.Line($"Mock Plug-In: Assembly loaded ({dsAsm.FullName}) from \"{dsAsm.Location}\".");
ConsoleWrite.Line($"Mock Plug-In: Doing mock work.");
await Task.Delay(RunningTimeMillis);
ConsoleWrite.LineLine($"Mock Plug-In: Mock work done. Unloading plugin and assemblies.");
dsAsm = null;
asmLoadCtx.Unload();
var asmLoadCtxWeakRef = new WeakReference(asmLoadCtx);
asmLoadCtx = null;
int unloadWaitIterations = 0;
while (asmLoadCtxWeakRef.IsAlive)
{
GC.Collect();
GC.WaitForPendingFinalizers();
unloadWaitIterations++;
if (unloadWaitIterations % 100 == 0)
{
ConsoleWrite.Line($"Plugin => Waiting To Unload => unloadIterations={unloadWaitIterations}.");
}
else if (unloadWaitIterations % 10 == 0)
{
await Task.Delay(1);
}
}
ConsoleWrite.LineLine($"Mock Plug-In: Plugin and assemblies unloaded. That's it.");
}
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($"FINISHED DEMO '{nameof(UseDiagnosticSourceStub)}'.");
}
private static void SetupListening()
{
ConsoleWrite.LineLine("Starting setting up DiagnosticSource listening.");
if (!DiagnosticSourceSafeExtensions.SubscribeToAllSourcesSafe(ObserverAdapter.OnNextHandler(
(DiagnosticListenerStub diagnosticListener) =>
{
diagnosticListener.GetNameSafe(out string diagnosticListenerName, out _);
ConsoleWrite.Line($"Subscriber called: diagnosticSourceObserver(diagnosticListener.Name: \"{diagnosticListenerName}\")");
if (diagnosticListenerName.Equals("DemoXxx.UseDiagnosticSource.Name1", StringComparison.Ordinal))
{
if (!diagnosticListener.SubscribeToEventsSafe(
ObserverAdapter.OnNextHandler((KeyValuePair <string, object> eventInfo) =>
{
ConsoleWrite.Line($"Event Handler called: eventObserver(eventName: \"{eventInfo.Key}\", payloadValue: {(eventInfo.Value ?? "<null>")})");
}),
(string eventName, object arg1, object arg2) =>
{
Validate.NotNull(eventName, nameof(eventName));
bool res = eventName.StartsWith("EventXyzName", StringComparison.OrdinalIgnoreCase) &&
(arg1 == null || !(arg1 is Int32 arg1Val) || arg1Val >= 0);
ConsoleWrite.Line($"Filter called: isEventEnabledFilter(eventName: \"{eventName}\", arg1: {(arg1 ?? "<null>")}, arg2: {(arg2 ?? "<null>")})."
+ $" Returning: {res}.");
return(res);
},
out IDisposable eventSubscription,
out _))
{
ConsoleWrite.LineLine("Could not set up an events subscription. Likely no events will be received. Error has been logged.");
}
}
}),
out IDisposable listenerSubscription,
out _))
{
ConsoleWrite.LineLine("Could not set up an all-sources-subscription. Likely no events will be received. Error has been logged.");
}
ConsoleWrite.Line("Finished setting up DiagnosticSource listening.");
}
private Assembly AssemblyResolveEventHandler(object sender, ResolveEventArgs args)
{
if (!GetPhaseOneCompleted())
{
ConsoleWrite.Line($"AssemblyResolveEventHandler: Phase One not completed => doing nothing.");
return(null);
}
string asmNameRequestedStr = args?.Name;
if (asmNameRequestedStr == null)
{
ConsoleWrite.Line($"AssemblyResolveEventHandler: No good arguments => doing nothing.");
return(null);
}
string dsAsmFilePath = Path.Combine(DiagnosticSourceAssemblyHiddenPath, DiagnosticSourceAssemblyFilename);
AssemblyName asmNameAtPath = GetAssemblyNameFromPath(dsAsmFilePath);
if (asmNameAtPath == null)
{
ConsoleWrite.Line($"AssemblyResolveEventHandler: Cannot extract assembly name from \"{dsAsmFilePath}\". Doing nothing.");
return(null);
}
else
{
AssemblyName asmNameRequested = new AssemblyName(asmNameRequestedStr);
if (AreEqual(asmNameAtPath, asmNameRequested))
{
ConsoleWrite.Line($"AssemblyResolveEventHandler: Match. Loading DS from special location.");
return(Assembly.Load(asmNameAtPath));
}
else
{
ConsoleWrite.Line($"AssemblyResolveEventHandler: No Match. Doing nothing.");
ConsoleWrite.Line($" Requested assembly: \"{asmNameRequested.FullName}\";");
ConsoleWrite.Line($" Present assembly: \"{asmNameAtPath.FullName}\".");
return(null);
}
}
}
public static void Run()
{
ConsoleWrite.LineLine($"STARTING DEMO '{nameof(UseDiagnosticSource)}'.");
SetupListening();
ConsoleWrite.LineLine("Starting to create new Diagnostic Sources.");
DiagnosticSource diagnosticSource1 = new DiagnosticListener("DemoXxx.UseDiagnosticSource.Name1");
DiagnosticSource diagnosticSource2 = new DiagnosticListener("DemoXxx.UseDiagnosticSource.Name2");
ConsoleWrite.Line("Finished creating new Diagnostic Sources.");
ConsoleWrite.LineLine("Starting to emit DiagnosticSource events.");
for (int i = 0; i < 1000; i++)
{
if (diagnosticSource1.IsEnabled("EventXyzName.A"))
{
diagnosticSource1.Write("EventXyzName", new EventXyzNamePayload("Foo", 42, i));
}
if (diagnosticSource1.IsEnabled("EventXyzName.B", arg1: "Something", arg2: 13.7))
{
diagnosticSource1.Write("EventXyzName", new EventXyzNamePayload("Bar", new[] { 1, 2, 3 }, i));
}
if (diagnosticSource1.IsEnabled("EventXyzName.C", arg1: -1))
{
diagnosticSource1.Write("EventXyzName", new EventXyzNamePayload(null, null, i));
}
diagnosticSource2.Write("EventAbcName", new { Value = "Something", IterationNr = i });
ConsoleWrite.LineLine($"-----------{i}-----------");
}
ConsoleWrite.Line("Finished to emit DiagnosticSource events.");
ConsoleWrite.LineLine($"FINISHED DEMO '{nameof(UseDiagnosticSource)}'.");
}
public void Run()
{
const int MaxIterations = 2000;
const int PhaseOneIterations = 500;
const int ReceivedEventsVisualWidth = 100;
ConsoleWrite.Line();
ConsoleWrite.Line($"Welcome to {this.GetType().FullName} in {Process.GetCurrentProcess().ProcessName}");
ConsoleWrite.Line();
ConsoleWrite.Line($"{nameof(HideDiagnosticSourceAssembly)} = {HideDiagnosticSourceAssembly}");
#pragma warning disable CS0162 // Unreachable code detected: intentional controll via a const bool.
if (HideDiagnosticSourceAssembly)
{
string destination = Path.Combine(DiagnosticSourceAssemblyHiddenPath, DiagnosticSourceAssemblyFilename);
try
{
Directory.CreateDirectory(DiagnosticSourceAssemblyHiddenPath);
if (File.Exists(destination))
{
File.Delete(destination);
}
}
catch { }
File.Move(DiagnosticSourceAssemblyFilename, destination);
ConsoleWrite.Line($"Moved \"{DiagnosticSourceAssemblyFilename}\" to \"{destination}\".");
ConsoleWrite.Line();
ConsoleWrite.Line($"Setting up the AssemblyResolve handler for the current AppDomain.");
AppDomain.CurrentDomain.AssemblyResolve += AssemblyResolveEventHandler;
}
else
{
ConsoleWrite.Line("Did not hide the DS assembly.");
}
#pragma warning restore CS0162 // Unreachable code detected
ConsoleWrite.LineLine($"Setting up {nameof(StubbedDiagnosticEventsCollector)}.");
var directResultsAccumulator = new ReceivedEventsAccumulator(MaxIterations);
var stubbedResultsAccumulator = new ReceivedEventsAccumulator(MaxIterations);
var stubbedCollector = new StubbedDiagnosticEventsCollector(directResultsAccumulator, stubbedResultsAccumulator);
SetPhaseOneCompleted(false);
ConsoleWrite.LineLine($"Starting {nameof(StubbedDiagnosticEventsGenerator)}.");
var stubbedGenerator = new StubbedDiagnosticEventsGenerator(MaxIterations, PhaseOneIterations);
Task stubbedGeneratorTask = Task.Run(stubbedGenerator.Run);
stubbedGenerator.PhaseOneCompletedEvent.Wait();
ConsoleWrite.LineLine($"Phase one of {nameof(stubbedGenerator)} completed.");
SetPhaseOneCompleted(true);
ConsoleWrite.Line($"Starting {nameof(DirectDiagnosticEventsGenerator)}.");
var directGenerator = new DirectDiagnosticEventsGenerator(MaxIterations, PhaseOneIterations);
Task directGeneratorTask = Task.Run(directGenerator.Run);
Task.WaitAll(stubbedGeneratorTask, directGeneratorTask);
ConsoleWrite.LineLine($"Both, {nameof(stubbedGenerator)} and {nameof(directGenerator)} finished.");
ConsoleWrite.LineLine($"Summary of {nameof(stubbedResultsAccumulator)}:"
+ $" Received events: {stubbedResultsAccumulator.ReceivedCount}; Proportion: {stubbedResultsAccumulator.ReceivedProportion}.");
ConsoleWrite.Line(Environment.NewLine + stubbedResultsAccumulator.GetReceivedVisual(ReceivedEventsVisualWidth));
ConsoleWrite.LineLine($"Summary of {nameof(directResultsAccumulator)}:"
+ $" Received events: {directResultsAccumulator.ReceivedCount}; Proportion: {directResultsAccumulator.ReceivedProportion}.");
ConsoleWrite.Line(Environment.NewLine + directResultsAccumulator.GetReceivedVisual(ReceivedEventsVisualWidth));
ConsoleWrite.LineLine("All done. Press enter to exit.");
Console.ReadLine();
ConsoleWrite.Line("Good bye.");
}
public void Run()
{
const int MaxIterations = 2000;
const int PhaseOneIterations = 500;
const int ReceivedEventsVisualWidth = 100;
ConsoleWrite.LineLine($"Welcome to {this.GetType().FullName} in {Process.GetCurrentProcess().ProcessName}");
ConsoleWrite.Line($"Starting {nameof(DirectDiagnosticEventsGenerator)}.");
var directGenerator = new DirectDiagnosticEventsGenerator(MaxIterations, PhaseOneIterations);
Task directGeneratorTask = Task.Run(directGenerator.Run);
ConsoleWrite.LineLine($"Setting up {nameof(StubbedDiagnosticEventsCollector)}.");
var directResultsAccumulator = new ReceivedEventsAccumulator(MaxIterations);
var stubbedResultsAccumulator = new ReceivedEventsAccumulator(MaxIterations);
var stubbedCollector = new StubbedDiagnosticEventsCollector(directResultsAccumulator, stubbedResultsAccumulator);
{
ConsoleWrite.LineLine($"Kicking off the DS magic.");
bool prevInit = DiagnosticSourceAssembly.IsInitialized;
bool nowInit = DiagnosticSourceAssembly.EnsureInitialized();
ConsoleWrite.Line($"DiagnosticSourceAssembly-magic status: prevInit={prevInit}, nowInit={nowInit}.");
}
directGenerator.PhaseOneCompletedEvent.Wait();
ConsoleWrite.LineLine($"Phase one of {nameof(directGenerator)} completed.");
ConsoleWrite.LineLine($"Starting {nameof(StubbedDiagnosticEventsGenerator)}.");
var stubbedGenerator = new StubbedDiagnosticEventsGenerator(MaxIterations, PhaseOneIterations);
Task stubbedGeneratorTask = Task.Run(stubbedGenerator.Run);
stubbedGenerator.PhaseOneCompletedEvent.Wait();
ConsoleWrite.LineLine($"Phase one of {nameof(stubbedGenerator)} completed.");
ConsoleWrite.LineLine($"Starting Mock Plug-In."
+ $" directGen.Iteration={directGenerator.CurrentIteration}; stubbedGen.Iteration={stubbedGenerator.CurrentIteration}.");
Task pulginTask = Task.Run(Plugin);
pulginTask.Wait();
ConsoleWrite.LineLine($"Completed Mock Plug-In."
+ $" directGen.Iteration={directGenerator.CurrentIteration}; stubbedGen.Iteration={stubbedGenerator.CurrentIteration}.");
ConsoleWrite.LineLine($"Waiting for event generators to finish.");
Task.WaitAll(stubbedGeneratorTask, directGeneratorTask);
ConsoleWrite.LineLine($"Both, {nameof(stubbedGenerator)} and {nameof(directGenerator)} finished.");
ConsoleWrite.LineLine($"Summary of {nameof(stubbedResultsAccumulator)}:"
+ $" Received events: {stubbedResultsAccumulator.ReceivedCount}; Proportion: {stubbedResultsAccumulator.ReceivedProportion}.");
ConsoleWrite.Line(Environment.NewLine + stubbedResultsAccumulator.GetReceivedVisual(ReceivedEventsVisualWidth));
ConsoleWrite.LineLine($"Summary of {nameof(directResultsAccumulator)}:"
+ $" Received events: {directResultsAccumulator.ReceivedCount}; Proportion: {directResultsAccumulator.ReceivedProportion}.");
ConsoleWrite.Line(Environment.NewLine + directResultsAccumulator.GetReceivedVisual(ReceivedEventsVisualWidth));
ConsoleWrite.LineLine("All done. Press enter to exit.");
Console.ReadLine();
ConsoleWrite.Line("Good bye.");
}
