public async Task OpenCircuit(
[OrchestrationTrigger] IDurableOrchestrationContext context,
ILogger log)
{
if (!context.IsReplaying)
{
log.LogInformation("Disabling function app to open circuit");
}
var resourceId = context.GetInput <string>();
var stopFunctionRequest = new DurableHttpRequest(
HttpMethod.Post,
new Uri($"https://management.azure.com{resourceId}/stop?api-version=2016-08-01"),
tokenSource: new ManagedIdentityTokenSource("https://management.core.windows.net"));
var restartResponse = await context.CallHttpAsync(stopFunctionRequest);
if (restartResponse.StatusCode != HttpStatusCode.OK)
{
throw new ArgumentException($"Failed to stop Function App: {restartResponse.StatusCode}: {restartResponse.Content}");
}
if (!context.IsReplaying)
{
log.LogInformation("Function disabled");
}
}
public static DurableHttpRequest ConvertTestRequestToDurableHttpRequest(TestDurableHttpRequest testRequest)
{
Dictionary <string, StringValues> testHeaders = new Dictionary <string, StringValues>(StringComparer.OrdinalIgnoreCase);
if (testRequest.Headers != null)
{
foreach (KeyValuePair <string, string> header in testRequest.Headers)
{
StringValues stringValues;
if (testHeaders.TryGetValue(header.Key, out stringValues))
{
stringValues.Append(header.Value);
testHeaders[header.Key] = stringValues;
}
else
{
stringValues = new StringValues(header.Value);
testHeaders[header.Key] = stringValues;
}
}
}
DurableHttpRequest durableHttpRequest = new DurableHttpRequest(
method: testRequest.HttpMethod,
uri: new Uri(testRequest.Uri),
headers: testHeaders,
content: testRequest.Content,
tokenSource: testRequest.TokenSource,
asynchronousPatternEnabled: testRequest.AsynchronousPatternEnabled);
return(durableHttpRequest);
}
public static async Task <string> RunOrchestrator(
[OrchestrationTrigger] IDurableOrchestrationContext context, ILogger log)
{
string endpoint = context.GetInput <object>().ToString();
var request = new DurableHttpRequest(HttpMethod.Get, new Uri(endpoint));
DurableHttpResponse endpointResponse = await context.CallHttpAsync(request);
if (endpointResponse.StatusCode != HttpStatusCode.OK)
{
throw new ArgumentException($"Failed to contact endpoint: {endpointResponse.StatusCode}: {endpointResponse.Content}");
}
log.LogInformation($"Information retrieved from endpoint = {endpointResponse.Content}.");
string[] words = endpointResponse.Content.Split(" ");
log.LogInformation($"Words count = {words.Count()}.");
var entityId = new EntityId("OrchestrationSample_Counter", "charCounter");
context.SignalEntity(entityId, "reset");
foreach (string word in words)
{
context.SignalEntity(entityId, "Add", word);
}
await context.CallActivityAsync("OrchestrationSample_LogBlob", endpoint.Replace("/", "bar"));
int count = await context.CallEntityAsync <int>(entityId, "Get");
return($"Endpoint: {endpoint} has the total of {count} chars");
}
public static async Task <DurableHttpResponse> CallHttpAsyncOrchestrator([OrchestrationTrigger] IDurableOrchestrationContext ctx)
{
TestDurableHttpRequest testRequest = ctx.GetInput <TestDurableHttpRequest>();
DurableHttpRequest durableHttpRequest = ConvertTestRequestToDurableHttpRequest(testRequest);
DurableHttpResponse response = await ctx.CallHttpAsync(durableHttpRequest);
return(response);
}
public async Task CallHttpActionOrchestrationWithManagedIdentityOptions()
{
DurableHttpRequest request = null;
// Mock the CallHttpAsync API so we can capture the request and return a fixed response.
var contextMock = new Mock <IDurableOrchestrationContext>();
contextMock
.Setup(ctx => ctx.CallHttpAsync(It.IsAny <DurableHttpRequest>()))
.Callback <DurableHttpRequest>(req => request = req)
.Returns(Task.FromResult(new DurableHttpResponse(System.Net.HttpStatusCode.OK)));
var shim = new OutOfProcOrchestrationShim(contextMock.Object);
var executionJson = @"
{
""isDone"": false,
""actions"": [
[{
""actionType"": ""CallHttp"",
""httpRequest"": {
""method"": ""GET"",
""uri"": ""https://example.com"",
""tokenSource"": {
""kind"": ""AzureManagedIdentity"",
""resource"": ""https://management.core.windows.net/.default"",
""options"": {
""authorityhost"": ""https://login.microsoftonline.com/"",
""tenantid"": ""example_tenant_id""
}
}
}
}]
]
}";
// Feed the out-of-proc execution result JSON to the out-of-proc shim.
var jsonObject = JObject.Parse(executionJson);
OrchestrationInvocationResult result = new OrchestrationInvocationResult()
{
ReturnValue = jsonObject,
};
bool moreWork = await shim.ScheduleDurableTaskEvents(result);
Assert.NotNull(request);
Assert.Equal(HttpMethod.Get, request.Method);
Assert.Equal(new Uri("https://example.com"), request.Uri);
Assert.Null(request.Content);
Assert.NotNull(request.TokenSource);
ManagedIdentityTokenSource tokenSource = Assert.IsType <ManagedIdentityTokenSource>(request.TokenSource);
Assert.Equal("https://management.core.windows.net/.default", tokenSource.Resource);
Assert.Equal("https://login.microsoftonline.com/", tokenSource.Options.AuthorityHost.ToString());
Assert.Equal("example_tenant_id", tokenSource.Options.TenantId);
}
internal static Task <DurableHttpResponse> PostData(IDurableOrchestrationContext context, string url, object body, string authToken)
{
var authHeaders = new Dictionary <string, StringValues>
{
["Authorization"] = new StringValues($"Bearer {authToken}")
};
var request = new DurableHttpRequest(
HttpMethod.Post, new Uri(url), authHeaders, JsonConvert.SerializeObject(body));
return(context.CallHttpAsync(request));
}
public static async Task RunOrchestrator(
[OrchestrationTrigger] IDurableOrchestrationContext context)
{
ResourceInfo vmInfo = context.GetInput <ResourceInfo>();
string apiVersion = vmInfo.ApiVersion ?? "2018-06-01";
string subscriptionId = vmInfo.SubscriptionId;
string resourceGroup = vmInfo.ResourceGroup;
// Implicitly uses the Azure AD identity of the current app to make an HTTP call to Azure Resource Manager
var managedIdentity = new ManagedIdentityTokenSource("https://management.core.windows.net");
// List all of the VMs in my subscription and add them to a list.
DurableHttpRequest request = new DurableHttpRequest(
HttpMethod.Get,
new Uri($"https://management.azure.com/subscriptions/{subscriptionId}/providers/Microsoft.Compute/virtualMachines?api-version=2018-06-01"),
tokenSource: managedIdentity);
DurableHttpResponse response = await context.CallHttpAsync(request);
if (response.StatusCode != HttpStatusCode.OK)
{
throw new ArgumentException($"Failed to list VMs: {response.StatusCode}: {response.Content}");
}
// Deserializes content to just get the names of the VMs in the subscription
JObject jObject = JsonConvert.DeserializeObject <JObject>(response.Content);
var vmNamesList = new List <string>();
foreach (JToken value in jObject["value"])
{
string vmName = value["name"].ToString();
vmNamesList.Add(vmName);
}
// Restart all of the VMs in my subscription
foreach (string vmName in vmNamesList)
{
var restartRequest = new DurableHttpRequest(
HttpMethod.Post,
new Uri($"https://management.azure.com/subscriptions/{subscriptionId}/resourceGroups/{resourceGroup}/providers/Microsoft.Compute/virtualMachines/{vmName}/restart?api-version={apiVersion}"),
tokenSource: managedIdentity);
DurableHttpResponse restartResponse = await context.CallHttpAsync(restartRequest);
if (restartResponse.StatusCode != HttpStatusCode.OK)
{
throw new ArgumentException($"Failed to restart VM: {restartResponse.StatusCode}: {restartResponse.Content}");
}
}
}
public static async Task <List <string> > RunOrchestrator(
[OrchestrationTrigger] IDurableOrchestrationContext context)
{
// param into orchestrator
OrchestratorInput oi = context.GetInput <OrchestratorInput>();
// call activity function
await context.CallActivityAsync <List <string> >(nameof(MyActivityFunction), oi.Url);
// call durable entity
List <string> result = await ContactDurableEntity(context);
// call http
var request = new DurableHttpRequest(HttpMethod.Post, new Uri(oi.Url), content: "myContent");
DurableHttpResponse response = await context.CallHttpAsync(request);
return(result);
}
public async Task CallHttpActionOrchestrationWithManagedIdentity()
{
DurableHttpRequest request = null;
// Mock the CallHttpAsync API so we can capture the request and return a fixed response.
var contextMock = new Mock <IDurableOrchestrationContext>();
contextMock
.Setup(ctx => ctx.CallHttpAsync(It.IsAny <DurableHttpRequest>()))
.Callback <DurableHttpRequest>(req => request = req)
.Returns(Task.FromResult(new DurableHttpResponse(System.Net.HttpStatusCode.OK)));
var shim = new OutOfProcOrchestrationShim(contextMock.Object);
var executionJson = @"
{
""isDone"": false,
""actions"": [
[{
""actionType"": ""CallHttp"",
""httpRequest"": {
""method"": ""GET"",
""uri"": ""https://example.com"",
""tokenSource"": {
""kind"": ""AzureManagedIdentity"",
""resource"": ""https://management.core.windows.net""
}
}
}]
]
}";
// Feed the out-of-proc execution result JSON to the out-of-proc shim.
var jsonObject = JObject.Parse(executionJson);
await shim.ExecuteAsync(jsonObject);
Assert.NotNull(request);
Assert.Equal(HttpMethod.Get, request.Method);
Assert.Equal(new Uri("https://example.com"), request.Uri);
Assert.Null(request.Content);
Assert.NotNull(request.TokenSource);
ManagedIdentityTokenSource tokenSource = Assert.IsType <ManagedIdentityTokenSource>(request.TokenSource);
Assert.Equal("https://management.core.windows.net", tokenSource.Resource);
}
public static async Task SingleClientOnboardingOrchestration(
[OrchestrationTrigger] IDurableOrchestrationContext createAccountContext
)
{
AccountOpeningData payload = createAccountContext.GetInput <AccountOpeningData>();
if (null != payload)
{
string newAccountNumber = await createAccountContext.CallActivityAsync <string>(nameof( CreateRandomAccountNumber), null);
string jsonContent = JsonConvert.SerializeObject(payload);
var newAccountRequest = new DurableHttpRequest(
HttpMethod.Post,
new Uri($"https://retailbankazurefunctionapp.azurewebsites.net/api/OpenAccount/{newAccountNumber}?code=9IcflcYh904F3Dcbp5IGCPuDrqelVJniQK5Ck1ZcVdacOd3Mx4ShWQ=="),
content: jsonContent);
newAccountRequest.Headers.Add(@"Content-Type", @"application/json");
DurableHttpResponse restartResponse = await createAccountContext.CallHttpAsync(newAccountRequest);
}
}
public async Task CallHttpActionOrchestration()
{
DurableHttpRequest request = null;
// Mock the CallHttpAsync API so we can capture the request and return a fixed response.
var contextMock = new Mock <IDurableOrchestrationContext>();
contextMock
.Setup(ctx => ctx.CallHttpAsync(It.IsAny <DurableHttpRequest>()))
.Callback <DurableHttpRequest>(req => request = req)
.Returns(Task.FromResult(new DurableHttpResponse(System.Net.HttpStatusCode.OK)));
var shim = new OutOfProcOrchestrationShim(contextMock.Object);
var executionJson = @"
{
""isDone"": false,
""actions"": [
[{
""actionType"": ""CallHttp"",
""httpRequest"":
{
""method"": ""POST"",
""uri"": ""https://example.com"",
""headers"": {
""Content-Type"": ""application/json"",
""Accept"": [""application/json"",""application/xml""],
""x-ms-foo"": []
},
""content"": ""5""
}
}]
]
}";
// Feed the out-of-proc execution result JSON to the out-of-proc shim.
var jsonObject = JObject.Parse(executionJson);
OrchestrationInvocationResult result = new OrchestrationInvocationResult()
{
ReturnValue = jsonObject,
};
bool moreWork = await shim.ScheduleDurableTaskEvents(result);
// The request should not have completed because one additional replay is needed
// to handle the result of CallHttpAsync. However, this test doesn't care about
// completing the orchestration - we just need to validate the CallHttpAsync call.
Assert.True(moreWork);
Assert.NotNull(request);
Assert.Equal(HttpMethod.Post, request.Method);
Assert.Equal(new Uri("https://example.com"), request.Uri);
Assert.Equal("5", request.Content);
Assert.Equal(3, request.Headers.Count);
Assert.True(request.Headers.TryGetValue("Content-Type", out StringValues contentTypeValues));
Assert.Single(contentTypeValues);
Assert.Equal("application/json", contentTypeValues[0]);
Assert.True(request.Headers.TryGetValue("Accept", out StringValues acceptValues));
Assert.Equal(2, acceptValues.Count);
Assert.Equal("application/json", acceptValues[0]);
Assert.Equal("application/xml", acceptValues[1]);
Assert.True(request.Headers.TryGetValue("x-ms-foo", out StringValues customHeaderValues));
Assert.Empty(customHeaderValues);
}
public async Task OpenCircuit(
[OrchestrationTrigger] IDurableOrchestrationContext context,
ILogger log)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
try
{
var failureRequest = context.GetInput <FailureRequest>();
var resourceId = failureRequest.ResourceId;
if (!context.IsReplaying)
{
log.LogInformation("Disabling function app ({resourceId}) to open circuit.", resourceId);
}
var managedIdentity = new ManagedIdentityTokenSource("https://management.azure.com/.default");
// Note: Configurable resourceId works only for other Azure App Service applications.
var stopFunctionRequest = new DurableHttpRequest(
HttpMethod.Post,
new Uri($"https://management.azure.com{resourceId}/stop?api-version=2019-08-01"),
tokenSource: managedIdentity);
// Note: Use of ConfigureAwait can break orchestration tasks (prevents from completing; instance remains in a 'running' state).
// See https://github.com/Azure/azure-functions-durable-extension/issues/995 and
// https://docs.microsoft.com/en-us/azure/azure-functions/durable/durable-functions-code-constraints
#pragma warning disable CA2007 // Consider calling ConfigureAwait on the awaited task
DurableHttpResponse restartResponse = await context.CallHttpAsync(stopFunctionRequest);
#pragma warning restore CA2007 // Consider calling ConfigureAwait on the awaited task
if (restartResponse.StatusCode != HttpStatusCode.OK)
{
if (!context.IsReplaying)
{
log.LogError("Failed to stop Function App: {restartResponse.StatusCode}: {restartResponse.Content}", restartResponse.StatusCode, restartResponse.Content);
}
throw new ApplicationException($"Failed to stop Function App: {restartResponse.StatusCode}: {restartResponse.Content}");
}
if (restartResponse.StatusCode == HttpStatusCode.OK)
{
if (!context.IsReplaying)
{
// Logging as a warning to aide in noticing this messages, as stopping of an Azure Function
// may be an action worthy of human intervention.
log.LogWarning("Successfully STOPPED Azure Function with Resource ID {resourceId}.", resourceId);
}
}
return;
}
catch (Exception e)
{
log.LogError(e, "Unexpected error '{msg}' while processing.", e.Message);
throw;
}
}
public async Task <DurableHttpResponse> CallHttpAsync(DurableHttpRequest req)
{
throw new NotImplementedException();
}
public Task <DurableHttpResponse> CallHttpAsync(DurableHttpRequest req)
{
var response = _client.CallHttpHandler?.Invoke(req) ?? new DurableHttpResponse(HttpStatusCode.OK);
return(Task.FromResult(response));
}
public static async Task <LoanApplicationResult> Orchestrate(
[OrchestrationTrigger] IDurableOrchestrationContext context,
[SignalR(HubName = "dashboard")] IAsyncCollector <SignalRMessage> dashboardMessages,
ILogger logger)
{
var loanApplication = context.GetInput <LoanApplication>();
var agencyTasks = new List <Task <CreditAgencyResult> >();
var agencies = new List <CreditAgencyRequest>();
var results = new CreditAgencyResult[] {};
logger.LogWarning($"Status of application for {loanApplication.Applicant.ToString()} for {loanApplication.LoanAmount}: Checking with agencies.");
// start the process and perform initial validation
bool loanPreApproved = await context.CallActivityAsync <bool>(nameof(Receive), loanApplication);
// fan out and check the credit agencies
agencies.AddRange(new CreditAgencyRequest[] {
new CreditAgencyRequest {
AgencyName = "Contoso, Ltd.", AgencyId = "contoso", Application = loanApplication
},
new CreditAgencyRequest {
AgencyName = "Fabrikam, Inc.", AgencyId = "fabrikam", Application = loanApplication
},
new CreditAgencyRequest {
AgencyName = "Woodgrove Bank", AgencyId = "woodgrove", Application = loanApplication
},
});
foreach (var agency in agencies)
{
agencyTasks.Add(context.CallActivityAsync <CreditAgencyResult>(nameof(CheckCreditAgency), agency));
}
await context.CallActivityAsync(nameof(SendDashboardMessage), new SignalRMessage
{
Target = "agencyCheckPhaseStarted",
Arguments = new object[] { }
});
// wait for all the agencies to return their results
results = await Task.WhenAll(agencyTasks);
await context.CallActivityAsync(nameof(SendDashboardMessage), new SignalRMessage
{
Target = "agencyCheckPhaseCompleted",
Arguments = new object[] { !(results.Any(x => x.IsApproved == false)) }
});
var loanApplicationResult = new LoanApplicationResult
{
IsApproved = loanPreApproved && !(results.Any(x => x.IsApproved == false)),
Application = loanApplication
};
logger.LogWarning($"Agency checks result with {loanApplicationResult.IsApproved} for loan amount of {loanApplication.LoanAmount.Amount} to customer {loanApplication.Applicant.ToString()}");
foreach (var agencyResult in results)
{
loanApplicationResult.AgencyResults.Add(new AgencyCheckResult
{
AgencyName = agencyResult.AgencyId,
IsApproved = agencyResult.IsApproved
});
}
// send the loan for final human validation
logger.LogInformation($"Sending loan application for {loanApplicationResult.Application.Applicant.FirstName} {loanApplicationResult.Application.Applicant.LastName} for approval");
var json = System.Text.Json.JsonSerializer.Serialize <LoanApplicationResult>(loanApplicationResult,
new JsonSerializerOptions
{
WriteIndented = true
});
logger.LogInformation(json);
var url = Environment.GetEnvironmentVariable("LoanOfficerServiceUrl");
logger.LogInformation(url);
var request = new DurableHttpRequest(
HttpMethod.Post,
new Uri(url),
headers: new Dictionary <string, StringValues> {
{ "Content-Type", "application/json" }
},
content: json,
asynchronousPatternEnabled: false
);
DurableHttpResponse restartResponse = await context.CallHttpAsync(request);
logger.LogInformation($"Status code returned: {restartResponse.StatusCode}");
if (restartResponse.StatusCode == HttpStatusCode.Accepted)
{
await context.CallActivityAsync(nameof(SendDashboardMessage), new SignalRMessage
{
Target = "loanApplicationComplete",
Arguments = new object[] { loanApplicationResult }
});
}
return(loanApplicationResult);
}