public static async Task <HttpResponseMessage> RunAsync(
[HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "analyze")] HttpRequestMessage request,
TraceWriter log,
ExecutionContext context,
CancellationToken cancellationToken)
{
using (IUnityContainer childContainer = Container.CreateChildContainer().WithTracer(log, true))
{
// Create a tracer for this run (that will also log to the specified TraceWriter)
ITracer tracer = childContainer.Resolve <ITracer>();
tracer.TraceInformation($"Analyze function request received with invocation Id {context.InvocationId}");
tracer.AddCustomProperty("FunctionName", context.FunctionName);
tracer.AddCustomProperty("InvocationId", context.InvocationId.ToString("N", CultureInfo.InvariantCulture));
try
{
// Trace app counters (before analysis)
tracer.TraceAppCounters();
// Read the request
SmartDetectorAnalysisRequest smartDetectorExecutionRequest = await request.Content.ReadAsAsync <SmartDetectorAnalysisRequest>(cancellationToken);
tracer.AddCustomProperty("SmartDetectorId", smartDetectorExecutionRequest.SmartDetectorId);
tracer.TraceInformation($"Analyze request received: {JsonConvert.SerializeObject(smartDetectorExecutionRequest)}");
// Process the request
ISmartDetectorRunner runner = childContainer.Resolve <ISmartDetectorRunner>();
bool shouldDetectorTrace = bool.Parse(ConfigurationReader.ReadConfig("ShouldDetectorTrace", required: true));
List <ContractsAlert> alertPresentations = await runner.AnalyzeAsync(smartDetectorExecutionRequest, shouldDetectorTrace, cancellationToken);
tracer.TraceInformation($"Analyze completed, returning {alertPresentations.Count} Alerts");
// Create the response with StringContent to prevent Json from serializing to a string
var response = request.CreateResponse(HttpStatusCode.OK);
response.Content = new StringContent(JsonConvert.SerializeObject(alertPresentations), Encoding.UTF8, "application/json");
return(response);
}
catch (AnalysisFailedException afe)
{
// Handle the exception
TopLevelExceptionHandler.TraceUnhandledException(afe, tracer, log);
// Return error status
return(request.CreateResponse(afe.StatusCode, afe.ReasonPhrase));
}
catch (Exception e)
{
// Handle the exception
TopLevelExceptionHandler.TraceUnhandledException(e, tracer, log);
// Return error status
return(request.CreateResponse(HttpStatusCode.InternalServerError, e.Message));
}
finally
{
// Trace app counters (after analysis)
tracer.TraceAppCounters();
}
}
}
public async Task WhenRunningSmartDetectorAnalyzeThenCustomExceptionsAreHandledCorrectly()
{
// Notify the Smart Detector that it should throw a custom exception
this.smartDetector.ShouldThrowCustom = true;
// Run the Smart Detector
ISmartDetectorRunner runner = this.testContainer.Resolve <ISmartDetectorRunner>();
await runner.AnalyzeAsync(this.analysisRequest, true, default(CancellationToken));
}
public async Task WhenRunningSmartDetectorAnalyzeItIsDisposedIfItImplementsIDisposable()
{
this.smartDetector = new DisposableTestSmartDetector {
ExpectedResourceType = ResourceType.VirtualMachine
};
// Run the Smart Detector
ISmartDetectorRunner runner = this.testContainer.Resolve <ISmartDetectorRunner>();
await runner.AnalyzeAsync(this.analysisRequest, true, default(CancellationToken));
Assert.IsTrue(((DisposableTestSmartDetector)this.smartDetector).WasDisposed);
}
public async Task WhenRunningSmartDetectorAnalyzeThenTheCorrectAlertIsReturned()
{
// Run the Smart Detector and validate results
ISmartDetectorRunner runner = this.testContainer.Resolve <ISmartDetectorRunner>();
List <ContractsAlert> contractsAlerts = await runner.AnalyzeAsync(this.analysisRequest, true, default(CancellationToken));
Assert.IsNotNull(contractsAlerts, "Presentation list is null");
Assert.AreEqual(1, contractsAlerts.Count);
Assert.AreEqual("Test title", contractsAlerts.Single().Title);
Assert.IsNull(contractsAlerts.Single().ResolutionParameters);
// Assert the detector's state
Assert.AreEqual(1, this.stateRepository.Count);
Assert.AreEqual("test state", this.stateRepository["test key"]);
}
/// <summary>
/// Run the Smart Detector, by delegating the call to the registered <see cref="ISmartDetectorRunner"/>
/// </summary>
/// <param name="request">The Smart Detector request</param>
/// <param name="cancellationToken">The cancellation token</param>
/// <returns>A <see cref="Task{TResult}"/>, returning the result of the call to the runner.</returns>
private static async Task <object> RunSmartDetectorAsync(SmartDetectorRunnerChildProcessInput request, CancellationToken cancellationToken)
{
ISmartDetectorRunner smartDetectorRunner = container.Resolve <ISmartDetectorRunner>();
bool shouldDetectorTrace = bool.Parse(ConfigurationReader.ReadConfig("ShouldDetectorTrace", required: true));
if (request.AnalysisRequest != null)
{
return(await smartDetectorRunner.AnalyzeAsync(request.AnalysisRequest, shouldDetectorTrace, cancellationToken));
}
else if (request.AlertResolutionCheckRequest != null)
{
return(await smartDetectorRunner.CheckResolutionAsync(request.AlertResolutionCheckRequest, shouldDetectorTrace, cancellationToken));
}
throw new ArgumentException("Unable to determine flow to run for Smart Detector", nameof(request));
}
public async Task WhenRunningSmartDetectorAnalyzeAndNotReadyExceptionIsThrownThenNoAlertsAreReturned()
{
// Setup the exception to throw
this.smartDetector.ExceptionToThrow = new DetectorNotReadyException();
this.smartDetector.ShouldThrow = true;
// Run the Smart Detector and validate results
ISmartDetectorRunner runner = this.testContainer.Resolve <ISmartDetectorRunner>();
List <ContractsAlert> contractsAlerts = await runner.AnalyzeAsync(this.analysisRequest, true, default(CancellationToken));
Assert.IsNotNull(contractsAlerts, "Contract alerts list is null");
Assert.AreEqual(0, contractsAlerts.Count);
// Assert the detector's state
Assert.AreEqual(1, this.stateRepository.Count);
Assert.AreEqual("test state", this.stateRepository["test key"]);
}
public async Task WhenRunningSmartDetectorAnalyzeThenExceptionsAreHandledCorrectly()
{
// Notify the Smart Detector that it should throw an exception
this.smartDetector.ShouldThrow = true;
// Run the Smart Detector
ISmartDetectorRunner runner = this.testContainer.Resolve <ISmartDetectorRunner>();
try
{
await runner.AnalyzeAsync(this.analysisRequest, true, default(CancellationToken));
}
catch (FailedToRunSmartDetectorException e)
{
// Expected exception
Assert.IsNull(e.InnerException, "e.InnerException != null");
Assert.IsTrue(e.Message.Contains(typeof(DivideByZeroException).Name), "e.Message.Contains(typeof(DivideByZeroException).Name)");
throw;
}
}
public async Task WhenRunningSmartDetectorAnalyzeThenCancellationIsHandledGracefully()
{
// Notify the Smart Detector that it should get stuck and wait for cancellation
this.smartDetector.ShouldStuck = true;
// Run the Smart Detector asynchronously
ISmartDetectorRunner runner = this.testContainer.Resolve <ISmartDetectorRunner>();
CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
Task t = runner.AnalyzeAsync(this.analysisRequest, true, cancellationTokenSource.Token);
SpinWait.SpinUntil(() => this.smartDetector.IsRunning);
// Cancel and wait for expected result
cancellationTokenSource.Cancel();
FailedToRunSmartDetectorException ex = await Assert.ThrowsExceptionAsync <FailedToRunSmartDetectorException>(() => t);
Assert.IsNull(ex.InnerException, "e.InnerException != null");
Assert.IsTrue(ex.Message.Contains(typeof(TaskCanceledException).Name), "e.Message.Contains(typeof(TaskCanceledException).Name)");
Assert.IsTrue(this.smartDetector.WasCanceled, "The Smart Detector was not canceled!");
}
public async Task WhenRunningSmartDetectorAnalyzeWithResolutionForSupportingDetectorThenTheCorrectAlertIsReturned()
{
this.autoResolveSmartDetector.ShouldAutoResolve = true;
this.analysisRequest.SmartDetectorId = "2";
// Run the Smart Detector and validate results
ISmartDetectorRunner runner = this.testContainer.Resolve <ISmartDetectorRunner>();
List <ContractsAlert> contractsAlerts = await runner.AnalyzeAsync(this.analysisRequest, true, default(CancellationToken));
Assert.IsNotNull(contractsAlerts, "Presentation list is null");
Assert.AreEqual(1, contractsAlerts.Count);
Assert.AreEqual("Test title", contractsAlerts.Single().Title);
Assert.IsNotNull(contractsAlerts.Single().ResolutionParameters);
// Assert the detector's state
Assert.AreEqual(2, this.stateRepository.Count);
Assert.AreEqual("test state", this.stateRepository["test key"]);
Assert.IsInstanceOfType(this.stateRepository[$"_autoResolve{contractsAlerts.Single().CorrelationHash}"], typeof(ResolutionState));
var resolutionState = (ResolutionState)this.stateRepository[$"_autoResolve{contractsAlerts.Single().CorrelationHash}"];
Assert.AreEqual(1, resolutionState.AlertPredicates.Count);
Assert.AreEqual("Predicate value", resolutionState.AlertPredicates["Predicate"]);
}
private async Task RunSmartDetectorWithResourceTypes(ResourceType requestResourceType, ResourceType smartDetectorResourceType, bool shouldFail)
{
this.TestInitialize(requestResourceType, smartDetectorResourceType);
ISmartDetectorRunner runner = this.testContainer.Resolve <ISmartDetectorRunner>();
try
{
List <ContractsAlert> alertPresentations = await runner.AnalyzeAsync(this.analysisRequest, true, default(CancellationToken));
if (shouldFail)
{
Assert.Fail("An exception should have been thrown - resource types are not compatible");
}
Assert.AreEqual(1, alertPresentations.Count);
}
catch (IncompatibleResourceTypesException)
{
if (!shouldFail)
{
throw;
}
}
}
