public async Task PublishAsync(EventPublishData data, PublishPreferences preferences)
{
var eventDesc = new EventDescriptor {
Service = data.Service, Event = data.Event
};
var subscribers = _eventSubscriber.GetSubscribers(eventDesc).ToList();
if (subscribers.Count == 0)
{
return;
}
foreach (var subscriber in subscribers)
{
var invokeData = new MethodInvocationData
{
IntentId = _idGenerator.NewId(),
Service = subscriber.Service,
Method = subscriber.Method,
Parameters = data.Parameters,
FlowContext = data.FlowContext,
Caller = new CallerDescriptor(data.Service, data.Event, data.IntentId)
};
InvokeInBackground(invokeData, preferences);
}
}
/// <summary>
/// 保存事件
/// 作者:郭明
/// 日期：2017年11月15日
/// </summary>
/// <param name="events"></param>
/// <param name="transaction"></param>
/// <returns></returns>
public async Task <List <EventLogEntry> > SaveEventAsync(List <EventLogEntry> LogEntrys, IDbTransaction transaction)
{
if (transaction == null)
{
throw new ArgumentNullException("transaction", $"A {typeof(DbTransaction).FullName} is required as a pre-requisite to save the event.");
}
var sqlParamtersList = new List <DynamicParameters>();
foreach (var eventLogEntry in LogEntrys)
{
if (eventLogEntry.EventId <= 0)
{
eventLogEntry.EventId = _uniqueIdGenerator.NewId();
}
var sqlParamters = new DynamicParameters();
sqlParamters.Add("EventId", eventLogEntry.EventId, System.Data.DbType.Int64, System.Data.ParameterDirection.Input, 6);
sqlParamters.Add("MessageId", eventLogEntry.MessageId, System.Data.DbType.StringFixedLength, System.Data.ParameterDirection.Input, 50);
sqlParamters.Add("TraceId", eventLogEntry.TraceId, System.Data.DbType.StringFixedLength, System.Data.ParameterDirection.Input, 50);
sqlParamters.Add("EventTypeName", eventLogEntry.EventTypeName, System.Data.DbType.StringFixedLength, System.Data.ParameterDirection.Input, 500);
sqlParamters.Add("State", eventLogEntry.State, System.Data.DbType.Int32, System.Data.ParameterDirection.Input, 4);
sqlParamters.Add("TimesSent", 0, System.Data.DbType.Int32, System.Data.ParameterDirection.Input, 4);
sqlParamters.Add("CreationTime", DateTime.UtcNow, System.Data.DbType.Date, System.Data.ParameterDirection.Input, 4);
sqlParamters.Add("Content", eventLogEntry.Content, System.Data.DbType.StringFixedLength, System.Data.ParameterDirection.Input);
sqlParamtersList.Add(sqlParamters);
}
await transaction.Connection.ExecuteAsync($"insert into {_mySqlConfiguration.TablePrefix}EventLogs(EventId,MessageId,TraceId,EventTypeName,State,TimesSent,CreationTime,Content) values(@EventId,@MessageId,@TraceId,@EventTypeName,@State,@TimesSent,@CreationTime,@Content)",
sqlParamtersList,
transaction : transaction
);
return(LogEntrys);
}
public bool TryRegisterNew(object taskCompletionSource, out TriggerReference triggerReference)
{
if (taskCompletionSource == null)
{
throw new ArgumentNullException(nameof(taskCompletionSource));
}
if (!TaskCompletionSourceAccessor.IsTaskCompletionSource(taskCompletionSource))
{
throw new ArgumentException($"Input object must be a TaskCompletionSource`1, but got {taskCompletionSource.GetType()}", nameof(taskCompletionSource));
}
var task = TaskCompletionSourceAccessor.GetTask(taskCompletionSource);
triggerReference = task.AsyncState as TriggerReference;
if (triggerReference != null)
{
return(false);
}
triggerReference = new TriggerReference
{
Id = _numericIdGenerator.NewId()
};
task.SetAsyncState(triggerReference);
return(true);
}
public Task Execute <TParameters>(IProxy proxy, MethodInfo methodInfo, ref TParameters parameters)
where TParameters : IValueContainer
{
var serviceProxyContext = (ServiceProxyContext)proxy.Context;
var intent = new ExecuteRoutineIntent
{
Id = _numericIdGenerator.NewId(),
ServiceId = serviceProxyContext.Descriptor.Id,
MethodId = _routineMethodIdProvider.GetId(methodInfo),
Parameters = parameters
};
var taskResultType =
// Dispose() does not return a task, and is the only exception.
#warning check if it's really IDisposable.Dispose
methodInfo.ReturnType == typeof(void)
? TaskAccessor.VoidTaskResultType
: TaskAccessor.GetTaskResultType(methodInfo.ReturnType);
var taskState = new RoutineReference
{
IntentId = intent.Id
#warning must have id of actual routine for dynamic subscription (subscribe after a routine already scheduled).
};
var proxyTask = TaskAccessor.CreateTask(taskState, taskResultType);
bool executeInline = !_transitionScope.IsActive || !IsCalledByRoutine(
_transitionScope.CurrentMonitor.Context,
// Skip 2 stack frames: current method and dynamically-generated proxy.
// WARNING! DO NOT PUT 'new StackFrame()' into a helper method!
new StackFrame(skipFrames: 2, fNeedFileInfo: false));
if (executeInline)
{
ExecuteAndAwaitInBackground(intent, proxyTask);
}
else
{
_transitionScope.CurrentMonitor.RegisterIntent(intent, proxyTask);
}
return(proxyTask);
}
internal void ScheduleRoutineFromEvent(EventSubscriberDescriptor eventSubscriberDescriptor, RoutineEventData raisedEventData)
{
var intentId = _idGenerator.NewId();
var pregeneratedRoutineId = intentId.ToString();
var routineDescriptor = new RoutineDescriptor
{
IntentId = intentId,
MethodId = eventSubscriberDescriptor.MethodId,
RoutineId = pregeneratedRoutineId
};
var eventData = new RoutineEventData
{
ServiceId = eventSubscriberDescriptor.ServiceId,
Routine = routineDescriptor,
Caller = new CallerDescriptor
{
ServiceId = raisedEventData.ServiceId
},
Parameters = raisedEventData.Parameters
};
var eventEnvelope = new RoutineEventEnvelope
{
CloudEventsVersion = CloudEventsEnvelope.Version,
EventType = DasyncCloudEventsTypes.InvokeRoutine.Name,
EventTypeVersion = DasyncCloudEventsTypes.InvokeRoutine.Version,
Source = "/" + (raisedEventData.ServiceId?.ServiceName ?? ""),
EventID = intentId.ToString(),
EventTime = DateTimeOffset.Now,
ContentType = "application/json",
Data = CloudEventsSerialization.Serialize(eventData)
};
var fileName = intentId.ToString() + ".json";
var filePath = Path.Combine(_transitionsDirectory, fileName);
var content = CloudEventsSerialization.Serialize(eventEnvelope);
File.WriteAllText(filePath, content, Encoding.UTF8);
}
public CancellationTokenSourceState Register(CancellationTokenSource source)
{
var state = (CancellationTokenSourceState)source.GetState();
if (state == null)
{
state = new CancellationTokenSourceState
{
Id = _idGenerator.NewId(),
CancelTime = source.GetCancellationTime()
};
source.SetState(state);
TryAdd(state.Id, source);
}
else if (!TryGet(state.Id, out var otherSource))
{
TryAdd(state.Id, source);
}
return(state);
}
public async Task <long> Test()
{
return(await Task.FromResult(uniqueIdGenerator.NewId()));
}
public async Task HandleAsync(PathString basePath, HttpContext context, CancellationToken ct)
{
var isQueryRequest = context.Request.Method == "GET";
var isCommandRequest = context.Request.Method == "POST";
if (!isQueryRequest && !isCommandRequest)
{
await ReplyWithTextError(context.Response, 405, "Only GET and POST verbs are allowed");
return;
}
var headers = context.Response.Headers;
headers.Add(DasyncHttpHeaders.PoweredBy, "D-ASYNC");
var basePathSegmentCount = basePath.Value.Split(new[] { '/' }, StringSplitOptions.RemoveEmptyEntries).Length;
var pathSegments = context.Request.Path.Value.Split(new[] { '/' }, StringSplitOptions.RemoveEmptyEntries).Skip(basePathSegmentCount).ToArray();
if (pathSegments.Length == 0)
{
await ReplyWithTextError(context.Response, 404, "Empty request URL");
return;
}
var serviceId = new ServiceId {
Name = pathSegments[0]
};
if (!_serviceResolver.TryResolve(serviceId, out var serviceReference))
{
await ReplyWithTextError(context.Response, 404, $"Service '{serviceId.Name}' is not registered");
return;
}
if (serviceReference.Definition.Type == ServiceType.External)
{
await ReplyWithTextError(context.Response, 404, $"Cannot invoke external service '{serviceReference.Definition.Name}' on your behalf");
return;
}
if (pathSegments.Length == 1)
{
await ReplyWithTextError(context.Response, 404, "The request URL does not contain a service method");
return;
}
var methodId = new MethodId {
Name = pathSegments[1]
};
string methodIntentId = null;
if (pathSegments.Length == 3)
{
methodIntentId = pathSegments[2];
if (isQueryRequest)
{
await HandleResultPoll(context, serviceReference.Id, methodId, methodIntentId);
return;
}
}
if (pathSegments.Length > 3)
{
await ReplyWithTextError(context.Response, 404, "The request URL contains extra segments");
return;
}
var contentType = context.Request.GetContentType();
ISerializer serializer;
try
{
serializer = GetSerializer(contentType, isQueryRequest);
}
catch (ArgumentException)
{
await ReplyWithTextError(context.Response, 406, $"The Content-Type '{contentType.MediaType}' is not supported");
return;
}
if (!_methodResolver.TryResolve(serviceReference.Definition, methodId, out var methodReference))
{
await ReplyWithTextError(context.Response, 404, $"The service '{serviceReference.Definition.Name}' does not have method '{methodId.Name}'");
return;
}
if (isQueryRequest && !methodReference.Definition.IsQuery)
{
await ReplyWithTextError(context.Response, 404, $"The method '{methodId.Name}' of service '{serviceReference.Definition.Name}' is a command, but not a query, thus must be invoked with the POST verb");
return;
}
MethodInvocationData invokeData = null;
MethodContinuationData continueData = null;
IValueContainer parametersContainer;
bool compressResponse = false;
bool respondWithEnvelope = false;
if (isQueryRequest)
{
var inputObject = new JObject();
foreach (var kvPair in context.Request.Query)
{
if (kvPair.Value.Count == 0)
{
continue;
}
var parameterName = kvPair.Key;
if (kvPair.Value.Count == 1)
{
var parameterValue = kvPair.Value[0];
inputObject.Add(parameterName, parameterValue);
}
else
{
var values = new JArray();
foreach (var value in kvPair.Value)
{
values.Add(value);
}
inputObject.Add(parameterName, values);
}
}
var parametersJson = inputObject.ToString();
parametersContainer = new SerializedValueContainer(parametersJson, _jsonSerializer);
invokeData = new MethodInvocationData
{
Service = serviceId,
Method = methodId,
Parameters = parametersContainer,
Caller = GetCaller(context.Request.Headers)
};
}
else
{
var payloadStream = context.Request.Body;
var encoding = context.Request.GetContentEncoding();
if (!string.IsNullOrEmpty(encoding))
{
if ("gzip".Equals(encoding, StringComparison.OrdinalIgnoreCase))
{
compressResponse = true;
payloadStream = new GZipStream(payloadStream, CompressionMode.Decompress, leaveOpen: true);
}
else if ("deflate".Equals(encoding, StringComparison.OrdinalIgnoreCase))
{
payloadStream = new DeflateStream(payloadStream, CompressionMode.Decompress, leaveOpen: true);
}
else
{
await ReplyWithTextError(context.Response, 406, $"The Content-Encoding '{encoding}' is not supported");
return;
}
}
var envelopeType = context.Request.Headers.GetValue(DasyncHttpHeaders.Envelope);
if (string.IsNullOrEmpty(envelopeType))
{
var payload = await payloadStream.ToBytesAsync();
parametersContainer = new SerializedValueContainer(payload, serializer);
if (string.IsNullOrEmpty(methodIntentId))
{
invokeData = new MethodInvocationData
{
Service = serviceId,
Method = methodId,
Parameters = parametersContainer,
Caller = GetCaller(context.Request.Headers)
};
}
else
{
continueData = new MethodContinuationData
{
Service = serviceId,
Method = methodId.CopyTo(new PersistedMethodId()),
Result = parametersContainer,
Caller = GetCaller(context.Request.Headers)
};
continueData.Method.IntentId = methodIntentId;
// TODO: get ETag from the query string
}
}
else if (envelopeType.Equals("invoke", StringComparison.OrdinalIgnoreCase))
{
respondWithEnvelope = true;
invokeData = await DeserializeAsync <MethodInvocationData>(serializer, payloadStream);
}
else if (envelopeType.Equals("continue", StringComparison.OrdinalIgnoreCase))
{
respondWithEnvelope = true;
continueData = await DeserializeAsync <MethodContinuationData>(serializer, payloadStream);
}
else
{
await ReplyWithTextError(context.Response, 406, $"Unknown envelope type '{envelopeType}'");
return;
}
}
var intentId = context.Request.Headers.GetValue(DasyncHttpHeaders.IntentId) ?? _idGenerator.NewId();
var externalRequestId = context.Request.Headers.GetValue(DasyncHttpHeaders.RequestId);
var externalCorrelationId = context.Request.Headers.GetValue(DasyncHttpHeaders.CorrelationId);
var isRetry = context.Request.Headers.IsRetry();
var rfc7240Preferences = context.Request.Headers.GetRFC7240Preferences();
var isHttpRequestBlockingExecution = !(rfc7240Preferences.RespondAsync == true);
var waitTime = rfc7240Preferences.Wait;
if (waitTime > MaxLongPollTime)
{
waitTime = MaxLongPollTime;
}
var waitForResult = isHttpRequestBlockingExecution || waitTime > TimeSpan.Zero;
var communicatorMessage = new HttpCommunicatorMessage
{
IsRetry = isRetry,
RequestId = externalRequestId,
WaitForResult = waitForResult
};
if (invokeData != null)
{
if (invokeData.IntentId == null)
{
invokeData.IntentId = intentId;
}
var invokeTask = _localTransitionRunner.RunAsync(invokeData, communicatorMessage);
if (isHttpRequestBlockingExecution)
{
var invocationResult = await invokeTask;
if (invocationResult.Outcome == InvocationOutcome.Complete)
{
await RespondWithMethodResult(context.Response, invocationResult.Result, serializer, respondWithEnvelope, compressResponse);
return;
}
if (waitForResult)
{
var taskResult = await TryWaitForResultAsync(
serviceReference.Id,
methodId, intentId, waitTime);
if (taskResult != null)
{
await RespondWithMethodResult(context.Response, taskResult, serializer, respondWithEnvelope, compressResponse);
return;
}
}
}
else
{
// TODO: continue 'invokeTask' and handle exceptions in background
}
communicatorMessage.WaitForResult = false;
var location = string.Concat(context.Request.Path, "/", intentId);
context.Response.Headers.Add("Location", location);
context.Response.Headers.Add(DasyncHttpHeaders.IntentId, intentId);
context.Response.StatusCode = DasyncHttpCodes.Scheduled;
}
else if (continueData != null)
{
if (continueData.IntentId == null)
{
continueData.IntentId = intentId;
}
var continueTask = _localTransitionRunner.ContinueAsync(continueData, communicatorMessage);
// TODO: continue 'continueTask' in backgraound to handle exceptions
context.Response.Headers.Add("Location", context.Request.Path.ToString());
context.Response.Headers.Add(DasyncHttpHeaders.IntentId, continueData.Method.IntentId);
context.Response.StatusCode = DasyncHttpCodes.Scheduled;
}
}
private async void RunMessageInBackground(Message message)
{
if (message.DeliverAt.HasValue && message.DeliverAt > DateTime.UtcNow)
{
await Task.Delay(message.DeliverAt.Value - DateTime.UtcNow);
}
else
{
await Task.Yield();
}
var ct = CancellationToken.None;
if (message.IsEvent)
{
var serviceId = Serializer.Deserialize <ServiceId>(message[nameof(ServiceId)]);
var eventId = Serializer.Deserialize <EventId>(message[nameof(EventId)]);
var eventDesc = new EventDescriptor {
EventId = eventId, ServiceId = serviceId
};
var subscribers = DataStore.GetEventSubscribers(eventDesc);
foreach (var subscriber in subscribers)
{
var routineId = Interlocked.Increment(ref DataStore.RoutineCounter);
var routineRecord = new RoutineStateRecord
{
ETag = DateTime.UtcNow.Ticks.ToString("X16"),
Id = routineId.ToString(),
Completion = new TaskCompletionSource <string>()
};
lock (DataStore.Routines)
{
DataStore.Routines.Add(routineRecord.Id, routineRecord);
}
var transitionDescriptor = new TransitionDescriptor
{
Type = TransitionType.InvokeRoutine,
ETag = routineRecord.ETag
};
var routineDescriptor = new RoutineDescriptor
{
MethodId = subscriber.MethodId,
IntentId = _uniqueIdGenerator.NewId(),
RoutineId = routineRecord.Id,
ETag = routineRecord.ETag
};
var invokeRoutineMessage = new Message
{
//["IntentId"] = _serializer.Serialize(intent.Id),
[nameof(TransitionDescriptor)] = Serializer.SerializeToString(transitionDescriptor),
[nameof(ServiceId)] = Serializer.SerializeToString(subscriber.ServiceId),
[nameof(RoutineDescriptor)] = Serializer.SerializeToString(routineDescriptor),
["Parameters"] = message["Parameters"]
};
DataStore.ScheduleMessage(invokeRoutineMessage);
}
}
else
{
for (; ;)
{
using (_serviceProviderScope.New())
{
var carrier = new TransitionCarrier(this, message);
carrier.Initialize();
//var transitionInfo = await data.GetTransitionDescriptorAsync(ct);
//if (transitionInfo.Type == TransitionType.InvokeRoutine ||
// transitionInfo.Type == TransitionType.ContinueRoutine)
//{
// var routineDescriptor = await data.GetRoutineDescriptorAsync(ct);
// if (!string.IsNullOrEmpty(transitionInfo.ETag) &&
// transitionInfo.ETag != routineDescriptor.ETag)
// {
// // Ignore - stale duplicate message
// return;
// }
//}
try
{
await _transitionRunner.RunAsync(carrier, ct);
break;
}
catch (ConcurrentRoutineExecutionException)
{
// re-try
continue;
}
}
}
}
}
public async Task <long> Test()
{
return(uniqueIdGenerator.NewId());
}
public Task Execute <TParameters>(IProxy proxy, MethodInfo methodInfo, ref TParameters parameters)
where TParameters : IValueContainer
{
var serviceProxyContext = (ServiceProxyContext)proxy.Context;
var methodDefinition = serviceProxyContext.Definition.FindMethod(methodInfo);
if (methodDefinition == null || methodDefinition.IsIgnored)
{
var invoker = _methodInvokerFactory.Create(methodInfo);
return(invoker.Invoke(proxy, parameters));
}
var intent = new ExecuteRoutineIntent
{
Id = _idGenerator.NewId(),
Service = serviceProxyContext.Descriptor.Id,
Method = _routineMethodIdProvider.GetId(methodInfo),
Parameters = parameters
};
Type taskResultType =
methodInfo.ReturnType == typeof(void)
? TaskAccessor.VoidTaskResultType
: TaskAccessor.GetTaskResultType(methodInfo.ReturnType);
var taskState = new RoutineReference
{
ServiceId = intent.Service,
MethodId = intent.Method,
IntentId = intent.Id
#warning must have id of actual routine for dynamic subscription (subscribe after a routine already scheduled).
};
var proxyTask = TaskAccessor.CreateTask(taskState, taskResultType);
bool invokedByRunningMethod = _transitionScope.IsActive &&
IsCalledByRoutine(
_transitionScope.CurrentMonitor.Context,
// Skip 2 stack frames: current method and dynamically-generated proxy.
// WARNING! DO NOT PUT 'new StackFrame()' into a helper method!
new StackFrame(skipFrames: 2, fNeedFileInfo: false));
bool ignoreTransaction = !invokedByRunningMethod;
if (!ignoreTransaction && _transitionScope.IsActive)
{
var runningMethodSettings = _communicationSettingsProvider.GetMethodSettings(
_transitionScope.CurrentMonitor.Context.MethodRef.Definition);
if (!runningMethodSettings.Transactional)
{
ignoreTransaction = true;
}
}
if (!ignoreTransaction)
{
var methodSettings = _communicationSettingsProvider.GetMethodSettings(methodDefinition);
if (methodSettings.IgnoreTransaction)
{
ignoreTransaction = true;
}
}
if (ignoreTransaction)
{
ExecuteAndAwaitInBackground(intent, proxyTask);
}
else
{
_transitionScope.CurrentMonitor.RegisterIntent(intent, proxyTask);
}
return(proxyTask);
}
public async Task HandleAsync(PathString basePath, HttpContext context, CancellationToken ct)
{
var headers = context.Response.Headers;
headers.Add(DasyncHttpHeaders.PoweredBy, "D-ASYNC");
var basePathSegmentCount = basePath.Value.Split('/', StringSplitOptions.RemoveEmptyEntries).Length;
var pathSegments = context.Request.Path.Value.Split('/', StringSplitOptions.RemoveEmptyEntries).Skip(basePathSegmentCount).ToArray();
if (pathSegments.Length == 0 && context.Request.Query.ContainsKey("react"))
{
await HandleEventReactionAsync(null, context, ct);
return;
}
if (pathSegments.Length == 0)
{
context.Response.StatusCode = 404;
context.Response.ContentType = "text/plain";
await context.Response.Body.WriteAsync(Encoding.UTF8.GetBytes("Empty request URL"));
return;
}
var serviceName = pathSegments[0];
var serviceDefinition = _communicationModelProvider.Model.FindServiceByName(serviceName);
if (serviceDefinition == null)
{
context.Response.StatusCode = 404;
context.Response.ContentType = "text/plain";
await context.Response.Body.WriteAsync(Encoding.UTF8.GetBytes($"Service '{serviceName}' is not registered"));
return;
}
if (serviceDefinition.Type == ServiceType.External)
{
context.Response.StatusCode = 403; // Forbidden
context.Response.ContentType = "text/plain";
await context.Response.Body.WriteAsync(Encoding.UTF8.GetBytes($"Cannot invoke external service '{serviceName}' on your behalf"));
return;
}
if (_eventDispatcher != null && pathSegments.Length == 1 && context.Request.Query.ContainsKey("react"))
{
await HandleEventReactionAsync(serviceDefinition, context, ct);
return;
}
if (pathSegments.Length == 1)
{
context.Response.StatusCode = 404;
context.Response.ContentType = "text/plain";
await context.Response.Body.WriteAsync(Encoding.UTF8.GetBytes("The request URL does not contain a service method"));
return;
}
if (_eventDispatcher != null && context.Request.Query.ContainsKey("subscribe"))
{
await HandleEventSubsciptionAsync(serviceDefinition, pathSegments[1], context, ct);
return;
}
var methodName = pathSegments[1];
if (pathSegments.Length == 3)
{
await HandleResultPoll(context, serviceName, methodName, intentId : pathSegments[2]);
return;
}
if (pathSegments.Length > 3)
{
context.Response.StatusCode = 404;
context.Response.ContentType = "text/plain";
await context.Response.Body.WriteAsync(Encoding.UTF8.GetBytes("The request URL contains extra segments"));
return;
}
var isQueryRequest = context.Request.Method == "GET";
var isCommandRequest = context.Request.Method == "PUT" || context.Request.Method == "POST";
var contentType = context.Request.GetContentType();
var isJsonRequest = string.Equals(contentType.MediaType, "application/json", StringComparison.OrdinalIgnoreCase);
var isDasyncJsonRequest = string.Equals(contentType.MediaType, "application/dasync+json", StringComparison.OrdinalIgnoreCase);
if (!isQueryRequest && !isJsonRequest && !isDasyncJsonRequest)
{
context.Response.StatusCode = 406; // Not Acceptable
context.Response.ContentType = "text/plain";
await context.Response.Body.WriteAsync(Encoding.UTF8.GetBytes("The request content type is either not specified or not supported"));
return;
}
if (!isQueryRequest && !isCommandRequest)
{
context.Response.StatusCode = 405; // Method Not Allowed
context.Response.ContentType = "text/plain";
await context.Response.Body.WriteAsync(Encoding.UTF8.GetBytes("The service method invocation must use one of these HTTP verbs: GET, POST, PUT"));
return;
}
var routineMethodId = new RoutineMethodId
{
MethodName = methodName
};
#warning Use model for method resolution instead
MethodInfo routineMethod;
try
{
routineMethod = _routineMethodResolver.Resolve(serviceDefinition, routineMethodId);
}
catch
{
context.Response.StatusCode = 404;
context.Response.ContentType = "text/plain";
await context.Response.Body.WriteAsync(Encoding.UTF8.GetBytes($"The service '{serviceDefinition.Name}' does not have method '{methodName}'"));
return;
}
#warning Use model to determine if the method is command or query
var isQueryMethod = GetWordAndSynonyms.Contains(GetFirstWord(methodName));
if (isQueryRequest && !isQueryMethod)
{
context.Response.StatusCode = 404;
context.Response.ContentType = "text/plain";
await context.Response.Body.WriteAsync(Encoding.UTF8.GetBytes($"The method '{methodName}' of service '{serviceDefinition.Name}' is a command, but not a query, thus must be invoked with POST or PUT verb"));
return;
}
string parametersJson = null;
ContinuationDescriptor continuationDescriptor = null;
if (isQueryRequest)
{
var inputObject = new JObject();
foreach (var kvPair in context.Request.Query)
{
if (kvPair.Value.Count == 0)
{
continue;
}
var parameterName = kvPair.Key;
if (kvPair.Value.Count == 1)
{
var parameterValue = kvPair.Value[0];
inputObject.Add(parameterName, parameterValue);
}
else
{
var values = new JArray();
foreach (var value in kvPair.Value)
{
values.Add(value);
}
inputObject.Add(parameterName, values);
}
}
parametersJson = inputObject.ToString();
}
else if (isJsonRequest)
{
parametersJson = await context.Request.ReadBodyAsStringAsync(contentType);
}
else
{
var inputJson = await context.Request.ReadBodyAsStringAsync(contentType);
var envelope = JsonConvert.DeserializeObject <CommandEnvelope>(inputJson, JsonSettings);
parametersJson = envelope.Parameters;
continuationDescriptor = envelope.Continuation;
}
var methodInvoker = _methodInvokerFactory.Create(routineMethod);
var parameterContainer = methodInvoker.CreateParametersContainer();
if (!string.IsNullOrWhiteSpace(parametersJson))
{
if (isDasyncJsonRequest)
{
_dasyncJsonSerializer.Populate(parametersJson, parameterContainer);
}
else
{
JsonConvert.PopulateObject(parametersJson, parameterContainer, JsonSettings);
}
}
var externalRequestId = context.Request.Headers.TryGetValue(DasyncHttpHeaders.RequestId, out var requestIdValues) && requestIdValues.Count > 0 ? requestIdValues[0] : null;
var externalCorrelationId = context.Request.Headers.TryGetValue(DasyncHttpHeaders.CorrelationId, out var correlationIdValues) && correlationIdValues.Count > 0 ? correlationIdValues[0] : null;
var rfc7240Preferences = GetPreferences(context.Request.Headers);
var isHttpRequestBlockingExecution = !(rfc7240Preferences.RespondAsync == true);
_transitionUserContext.Current = GetUserContext(context);
_intentPreprocessor.PrepareContext(context);
if (await _intentPreprocessor.PreprocessAsync(context, serviceDefinition, routineMethodId, parameterContainer).ConfigureAwait(false))
{
return;
}
var serviceId = new ServiceId {
ServiceName = serviceDefinition.Name
};
var intentId = _idGenerator.NewId();
if (isQueryMethod)
{
var serviceInstance = _domainServiceProvider.GetService(serviceDefinition.Implementation);
foreach (var postAction in _transitionActions)
{
await postAction.OnRoutineStartAsync(serviceDefinition, serviceId, routineMethodId, intentId);
}
Task task;
try
{
task = methodInvoker.Invoke(serviceInstance, parameterContainer);
if (routineMethod.ReturnType != typeof(void))
{
try { await task; } catch { }
}
}
catch (Exception ex)
{
if (ex is TargetInvocationException)
{
ex = ex.InnerException;
}
task = Task.FromException(ex);
}
var taskResult = task?.ToTaskResult() ?? new TaskResult();
foreach (var postAction in _transitionActions)
{
await postAction.OnRoutineCompleteAsync(serviceDefinition, serviceId, routineMethodId, intentId, taskResult);
}
await RespondWithRoutineResult(context, taskResult, isDasyncJsonRequest);
}
else
{
var intent = new ExecuteRoutineIntent
{
Id = intentId,
ServiceId = new ServiceId {
ServiceName = serviceDefinition.Name
},
MethodId = routineMethodId,
Parameters = parameterContainer,
Continuation = continuationDescriptor
};
var actions = new ScheduledActions
{
ExecuteRoutineIntents = new List <ExecuteRoutineIntent> {
intent
}
};
var options = new TransitionCommitOptions
{
NotifyOnRoutineCompletion = isHttpRequestBlockingExecution,
RequestId = externalRequestId,
CorrelationId = externalCorrelationId ?? externalRequestId
};
await _transitionCommitter.CommitAsync(actions, null, options, default);
var waitTime = rfc7240Preferences.Wait;
if (isHttpRequestBlockingExecution || waitTime > MaxLongPollTime)
{
waitTime = MaxLongPollTime;
}
if (waitTime > TimeSpan.Zero)
{
var cts = new CancellationTokenSource();
var completionSink = new TaskCompletionSource <TaskResult>();
_routineCompletionNotifier.NotifyCompletion(intent.ServiceId, intent.MethodId, intent.Id, completionSink, cts.Token);
try
{
var taskResult = await completionSink.Task.WithTimeout(waitTime);
await RespondWithRoutineResult(context, taskResult, isDasyncJsonRequest);
return;
}
catch (TaskCanceledException)
{
cts.Cancel();
}
}
var location = context.Request.Path.ToString() + "/" + intent.Id;
context.Response.Headers.Add("Location", location);
context.Response.StatusCode = DasyncHttpCodes.Scheduled;
return;
}
}
