private void AddInstanceExtension(WorkflowInstanceExtensionProvider extensionProvider)
{
Fx.Assert(_instanceExtensions != null, "instanceExtensions should be setup by now");
object newExtension = extensionProvider.ProvideValue();
if (newExtension is SymbolResolver)
{
throw CoreWf.Internals.FxTrace.Exception.AsError(new InvalidOperationException(SR.SymbolResolverMustBeSingleton));
}
// for IWorkflowInstance we key off the type of the value, not the declared type
if (!_shouldSetInstanceForInstanceExtensions && newExtension is IWorkflowInstanceExtension)
{
_shouldSetInstanceForInstanceExtensions = true;
}
if (!_hasTrackingParticipant && extensionProvider.IsMatch <TrackingParticipant>(newExtension))
{
_hasTrackingParticipant = true;
}
if (!_hasPersistenceModule && extensionProvider.IsMatch <IPersistencePipelineModule>(newExtension))
{
_hasPersistenceModule = true;
}
_instanceExtensions.Add(new KeyValuePair <WorkflowInstanceExtensionProvider, object>(extensionProvider, newExtension));
WorkflowInstanceExtensionManager.AddExtensionClosure(newExtension, ref _additionalInstanceExtensions, ref _hasTrackingParticipant, ref _hasPersistenceModule);
}
// locks down the given extensions manager and runs cache metadata on the workflow definition
protected void RegisterExtensionManager(WorkflowInstanceExtensionManager extensionManager)
{
ValidateWorkflow(extensionManager);
_extensions = WorkflowInstanceExtensionManager.CreateInstanceExtensions(this.WorkflowDefinition, extensionManager);
if (_extensions != null)
{
this.HasPersistenceModule = _extensions.HasPersistenceModule;
}
}
//void ThrowIfDynamicUpdateErrorExists(Collection<ActivityBlockingUpdate> updateErrors)
//{
// if (updateErrors != null && updateErrors.Count > 0)
// {
// // update error found
// // exit early
// throw CoreWf.Internals.FxTrace.Exception.AsError(new InstanceUpdateException(updateErrors));
// }
//}
private void ValidateWorkflow(WorkflowInstanceExtensionManager extensionManager)
{
if (!WorkflowDefinition.IsRuntimeReady)
{
LocationReferenceEnvironment localEnvironment = _hostEnvironment;
if (localEnvironment == null)
{
LocationReferenceEnvironment parentEnvironment = null;
if (extensionManager != null && extensionManager.SymbolResolver != null)
{
parentEnvironment = extensionManager.SymbolResolver.AsLocationReferenceEnvironment();
}
localEnvironment = new ActivityLocationReferenceEnvironment(parentEnvironment);
}
IList <ValidationError> validationErrors = null;
ActivityUtilities.CacheRootMetadata(WorkflowDefinition, localEnvironment, ProcessActivityTreeOptions.FullCachingOptions, null, ref validationErrors);
ActivityValidationServices.ThrowIfViolationsExist(validationErrors);
}
}
internal static WorkflowInstanceExtensionCollection CreateInstanceExtensions(Activity workflowDefinition, WorkflowInstanceExtensionManager extensionManager)
{
Fx.Assert(workflowDefinition.IsRuntimeReady, "activity should be ready with extensions after a successful CacheMetadata call");
if (extensionManager != null)
{
extensionManager.MakeReadOnly();
return(new WorkflowInstanceExtensionCollection(workflowDefinition, extensionManager));
}
else if ((workflowDefinition.DefaultExtensionsCount > 0) || (workflowDefinition.RequiredExtensionTypesCount > 0))
{
return(new WorkflowInstanceExtensionCollection(workflowDefinition, null));
}
else
{
return(null);
}
}
internal WorkflowInstanceExtensionCollection(Activity workflowDefinition, WorkflowInstanceExtensionManager extensionManager)
{
_extensionManager = extensionManager;
int extensionProviderCount = 0;
if (extensionManager != null)
{
extensionProviderCount = extensionManager.ExtensionProviders.Count;
_hasTrackingParticipant = extensionManager.HasSingletonTrackingParticipant;
_hasPersistenceModule = extensionManager.HasSingletonPersistenceModule;
// create an uber-IEnumerable to simplify our iteration code
_allSingletonExtensions = _extensionManager.GetAllSingletonExtensions();
}
else
{
_allSingletonExtensions = WorkflowInstanceExtensionManager.EmptySingletonExtensions;
}
// Resolve activity extensions
Dictionary <Type, WorkflowInstanceExtensionProvider> activityExtensionProviders;
Dictionary <Type, WorkflowInstanceExtensionProvider> filteredActivityExtensionProviders = null;
HashSet <Type> requiredActivityExtensionTypes;
if (workflowDefinition.GetActivityExtensionInformation(out activityExtensionProviders, out requiredActivityExtensionTypes))
{
// a) filter out the extension Types that were already configured by the host. Note that only "primary" extensions are in play here, not
// "additional" extensions
HashSet <Type> allExtensionTypes = new HashSet <Type>();
if (extensionManager != null)
{
extensionManager.AddAllExtensionTypes(allExtensionTypes);
}
if (activityExtensionProviders != null)
{
filteredActivityExtensionProviders = new Dictionary <Type, WorkflowInstanceExtensionProvider>(activityExtensionProviders.Count);
foreach (KeyValuePair <Type, WorkflowInstanceExtensionProvider> keyedActivityExtensionProvider in activityExtensionProviders)
{
Type newExtensionProviderType = keyedActivityExtensionProvider.Key;
if (!TypeHelper.ContainsCompatibleType(allExtensionTypes, newExtensionProviderType))
{
// first see if the new provider supersedes any existing ones
List <Type> typesToRemove = null;
bool skipNewExtensionProvider = false;
foreach (Type existingExtensionProviderType in filteredActivityExtensionProviders.Keys)
{
// Use AreReferenceTypesCompatible for performance since we know that all of these must be reference types
if (TypeHelper.AreReferenceTypesCompatible(existingExtensionProviderType, newExtensionProviderType))
{
skipNewExtensionProvider = true;
break;
}
if (TypeHelper.AreReferenceTypesCompatible(newExtensionProviderType, existingExtensionProviderType))
{
if (typesToRemove == null)
{
typesToRemove = new List <Type>();
}
typesToRemove.Add(existingExtensionProviderType);
}
}
// prune unnecessary extension providers (either superseded by the new extension or by an existing extension that supersedes them both)
if (typesToRemove != null)
{
for (int i = 0; i < typesToRemove.Count; i++)
{
filteredActivityExtensionProviders.Remove(typesToRemove[i]);
}
}
// and add a new extension if necessary
if (!skipNewExtensionProvider)
{
filteredActivityExtensionProviders.Add(newExtensionProviderType, keyedActivityExtensionProvider.Value);
}
}
}
if (filteredActivityExtensionProviders.Count > 0)
{
allExtensionTypes.UnionWith(filteredActivityExtensionProviders.Keys);
extensionProviderCount += filteredActivityExtensionProviders.Count;
}
}
// b) Validate that all required extensions will be provided
if (requiredActivityExtensionTypes != null && requiredActivityExtensionTypes.Count > 0)
{
foreach (Type requiredType in requiredActivityExtensionTypes)
{
if (!TypeHelper.ContainsCompatibleType(allExtensionTypes, requiredType))
{
throw CoreWf.Internals.FxTrace.Exception.AsError(new ValidationException(SR.RequiredExtensionTypeNotFound(requiredType.ToString())));
}
}
}
}
// Finally, if our checks of passed, resolve our delegates
if (extensionProviderCount > 0)
{
_instanceExtensions = new List <KeyValuePair <WorkflowInstanceExtensionProvider, object> >(extensionProviderCount);
if (extensionManager != null)
{
List <KeyValuePair <Type, WorkflowInstanceExtensionProvider> > extensionProviders = extensionManager.ExtensionProviders;
for (int i = 0; i < extensionProviders.Count; i++)
{
KeyValuePair <Type, WorkflowInstanceExtensionProvider> extensionProvider = extensionProviders[i];
AddInstanceExtension(extensionProvider.Value);
}
}
if (filteredActivityExtensionProviders != null)
{
foreach (WorkflowInstanceExtensionProvider extensionProvider in filteredActivityExtensionProviders.Values)
{
AddInstanceExtension(extensionProvider);
}
}
}
}