private ServiceAndMethodDefinitions Resolve(ServiceId serviceId, MethodId methodId, bool assumeExternal = false)
{
var result = new ServiceAndMethodDefinitions();
if (_serviceResolver.TryResolve(serviceId, out var serviceRef))
{
result.Service = serviceRef.Definition;
// NOTE: system services are not unique within a multi-service ecosystem, thus must
// use the configuration of the calling (proxy) service without any specific method.
// Otherwise, a continuation can be sent to a wrong instance of a system service.
if (result.Service.Type == ServiceType.System && !string.IsNullOrEmpty(serviceId.Proxy))
{
return(Resolve(new ServiceId {
Name = serviceId.Proxy
}, null, assumeExternal));
}
result.Method = methodId == null ? null : _methodResolver.Resolve(result.Service, methodId).Definition;
}
else if (assumeExternal)
{
var externalServiceDefinition = _externalCommunicationModel.GetOrAddService(serviceId);
var externalMethodDefinition = methodId == null ? null : externalServiceDefinition.GetOrAddMethod(methodId);
result.Service = externalServiceDefinition;
result.Method = externalMethodDefinition;
}
else
{
throw new ServiceResolveException(serviceId);
}
return(result);
}
private async Task <InvokeRoutineResult> RunRoutineAsync(
ITransitionCarrier transitionCarrier,
TransitionDescriptor transitionDescriptor,
CancellationToken ct)
{
var invocationResult = new InvokeRoutineResult();
using (_transitionScope.Enter(transitionDescriptor))
{
var transitionMonitor = _transitionScope.CurrentMonitor;
var serviceId = await transitionCarrier.GetServiceIdAsync(ct);
var methodId = await transitionCarrier.GetRoutineDescriptorAsync(ct);
var serviceReference = _serviceResolver.Resolve(serviceId);
var methodReference = _methodResolver.Resolve(serviceReference.Definition, methodId);
object serviceInstance = serviceReference.GetInstance();
//var serviceStateContainer = _serviceStateValueContainerProvider.CreateContainer(serviceInstance);
//var isStatefullService = serviceStateContainer.GetCount() > 0;
//if (isStatefullService)
// await transitionCarrier.ReadServiceStateAsync(serviceStateContainer, ct);
Type taskResultType =
methodReference.Definition.MethodInfo.ReturnType == typeof(void)
? TaskAccessor.VoidTaskResultType
: TaskAccessor.GetTaskResultType(methodReference.Definition.MethodInfo.ReturnType);
Task completionTask;
IValueContainer asmValueContainer = null;
if (TryCreateAsyncStateMachine(methodReference.Definition.MethodInfo, methodId.IntentId, out var asmInstance, out var asmMetadata))
{
var isContinuation = transitionDescriptor.Type == TransitionType.ContinueRoutine;
asmValueContainer = await LoadRoutineStateAsync(transitionCarrier, asmInstance, asmMetadata, isContinuation, ct);
asmMetadata.Owner.FieldInfo?.SetValue(asmInstance, serviceInstance);
transitionMonitor.OnRoutineStart(
serviceReference,
methodReference,
methodId,
serviceInstance,
asmInstance,
(transitionCarrier as TransitionCarrier)?.Caller);
try
{
asmInstance.MoveNext();
completionTask = GetCompletionTask(asmInstance, asmMetadata);
}
catch (Exception ex)
{
// The MoveNext() must not throw, but instead complete the task with an error.
// try-catch is added just in case for a non-compiler-generated state machine.
completionTask = TaskAccessor.FromException(taskResultType, ex);
}
}
public Unit VisitInlineMethod(Instruction instruction, MethodReference operand)
{
MarkLabel(instruction);
MethodBase method = _methodResolver.Resolve(operand);
MethodInfo methodInfo = method as MethodInfo;
if (methodInfo != null)
{
_generator.Emit(_opCodeMapper.Map(instruction.OpCode), methodInfo);
}
else
{
ConstructorInfo constructor = (ConstructorInfo)method;
_generator.Emit(_opCodeMapper.Map(instruction.OpCode), constructor);
}
return(Unit.Value);
}
public void ResolveRequestWithoutSession(IMethodResolver methodResolver, IAttachmentResolver attachmentResolver)
{
methodResolver.MethodText = MethodText;
attachmentResolver.AttachmentText = AttachmentText;
RequestMethod = methodResolver.Resolve();
RequestAttachment = attachmentResolver.Resolve();
if (methodResolver.Error.Level == ErrorLevels.NeedNotice)
{
Error.Errors.Add(methodResolver.Error);
}
if (attachmentResolver.Error.Level == ErrorLevels.NeedNotice)
{
Error.Errors.Add(attachmentResolver.Error);
}
}
private IEnumerable <Tuple <MethodBase, object> > FindEventAddRemoveAccessors(Action action)
{
DisassembleResult disassembleResult = _methodDisassembler.Disassemble(action.Method);
foreach (Instruction instruction in disassembleResult.Body.Instructions)
{
MethodReference calledMethod;
if (_instructionHelper.TryGetCall(instruction, out calledMethod))
{
if (IsEventAddRemoveMethod(calledMethod))
{
object target = calledMethod.HasThis
? GetInvocationTarget(disassembleResult.Body, instruction, action.Target)
: null;
MethodBase method = _methodResolver.Resolve(calledMethod);
yield return(Tuple.Create(method, target));
}
}
}
}
public void ResolveRequest(IMethodResolver methodResolver, ISessionResolver sessionResolver,
IAttachmentResolver attachmentResolver)
{
methodResolver.MethodText = MethodText;
sessionResolver.SessionText = SessionText;
attachmentResolver.AttachmentText = AttachmentText;
RequestMethod = methodResolver.Resolve();
Session = sessionResolver.Resolve();
RequestAttachment = attachmentResolver.Resolve();
if (methodResolver.Error.Level == ErrorLevels.NeedNotice)
{
Error.Errors.Add(methodResolver.Error);
}
if (attachmentResolver.Error.Level == ErrorLevels.NeedNotice)
{
Error.Errors.Add(attachmentResolver.Error);
}
if (sessionResolver.Error.Level == ErrorLevels.NeedNotice)
{
Error.Errors.Add(sessionResolver.Error);
}
}
public IMethodStateStorage GetStorage(ServiceId serviceId, MethodId methodId, bool returnNullIfNotFound = false)
{
if (_persistenceMethods.Count == 0)
{
if (returnNullIfNotFound)
{
return(null);
}
else
{
throw new MethodStateStorageNotFoundException("There are no method state storages registered.");
}
}
var serviceRef = _serviceResolver.Resolve(serviceId);
var methodRef = _methodResolver.Resolve(serviceRef.Definition, methodId);
lock (_storageMap)
{
if (_storageMap.TryGetValue(methodRef.Definition, out var cachedStorage))
{
return(cachedStorage);
}
}
var serviceCategory = serviceRef.Definition.Type == ServiceType.External ? "_external" : "_local";
var methodCategory = methodRef.Definition.IsQuery ? "queries" : "commands";
var persistenceType = _communicationSettingsProvider.GetMethodSettings(methodRef.Definition).PersistenceType;
IPersistenceMethod persistenceMethod;
if (string.IsNullOrWhiteSpace(persistenceType))
{
if (_persistenceMethods.Count == 1)
{
persistenceMethod = _persistenceMethods.First().Value;
}
else
{
if (returnNullIfNotFound)
{
return(null);
}
else
{
throw new MethodStateStorageNotFoundException("Multiple method state storages are available.");
}
}
}
else
{
if (!_persistenceMethods.TryGetValue(persistenceType, out persistenceMethod))
{
if (returnNullIfNotFound)
{
return(null);
}
else
{
throw new MethodStateStorageNotFoundException($"Method state storage '{persistenceType}' is not registered.");
}
}
}
var servicesSection = _configuration.GetSection("services");
var serviceSection = servicesSection.GetSection(serviceRef.Definition.Name);
var storageConfig = GetConfiguraion(
_configuration.GetSection("persistence"),
_configuration.GetSection(methodCategory).GetSection("persistence"),
servicesSection.GetSection(serviceCategory).GetSection("persistence"),
servicesSection.GetSection(serviceCategory).GetSection(methodCategory).GetSection("persistence"),
serviceSection.GetSection("persistence"),
serviceSection.GetSection(methodCategory).GetSection("_all").GetSection("persistence"),
serviceSection.GetSection(methodCategory).GetSection(methodRef.Definition.Name).GetSection("persistence"));
var storage = persistenceMethod.CreateMethodStateStorage(storageConfig);
lock (_storageMap)
{
if (_storageMap.TryGetValue(methodRef.Definition, out var cachedStorage))
{
(storage as IDisposable)?.Dispose();
return(cachedStorage);
}
_storageMap.Add(methodRef.Definition, storage);
return(storage);
}
}