private async Task AddActivityOutputAsync(Engine engine, ActivityExecutionContext activityExecutionContext, CancellationToken cancellationToken)
{
var workflowExecutionContext = activityExecutionContext.WorkflowExecutionContext;
var workflowInstance = activityExecutionContext.WorkflowInstance;
var workflowBlueprint = workflowExecutionContext.WorkflowBlueprint;
var activities = new Dictionary <string, object>();
foreach (var activity in workflowBlueprint.Activities.Where(x => !string.IsNullOrWhiteSpace(x.Name)))
{
var activityType = await _activityTypeService.GetActivityTypeAsync(activity.Type, cancellationToken);
var activityDescriptor = await _activityTypeService.DescribeActivityType(activityType, cancellationToken);
var outputProperties = activityDescriptor.OutputProperties;
var storageProviderLookup = activity.PropertyStorageProviders;
var activityModel = new Dictionary <string, object?>();
var storageContext = new WorkflowStorageContext(workflowInstance, activity.Id);
foreach (var property in outputProperties)
{
var propertyName = property.Name;
var storageProviderName = storageProviderLookup.GetItem(propertyName) ?? property.DefaultWorkflowStorageProvider;
activityModel[propertyName] = (Func <object?>)(() => _workflowStorageService.LoadAsync(storageProviderName, storageContext, propertyName, cancellationToken).Result);
}
activities[activity.Name !] = activityModel;
private async ValueTask <(Variables InputProperties, Variables OutputProperties)> GetActivityPropertiesAsync(IWorkflowBlueprintWrapper workflowBlueprintWrapper, IActivityBlueprintWrapper activityBlueprintWrapper, CancellationToken cancellationToken)
{
var activityBlueprint = activityBlueprintWrapper.ActivityBlueprint;
var activityType = await _activityTypeService.GetActivityTypeAsync(activityBlueprint.Type, cancellationToken);
var activityDescriptor = await _activityTypeService.DescribeActivityType(activityType, cancellationToken);
var activityId = activityBlueprint.Id;
var activityWrapper = workflowBlueprintWrapper.GetActivity(activityId) !;
var inputProperties = new Variables();
var outputProperties = new Variables();
foreach (var property in activityDescriptor.InputProperties)
{
var value = await GetPropertyValueAsync(workflowBlueprintWrapper.WorkflowBlueprint, activityWrapper, property, cancellationToken);
inputProperties.Set(property.Name, value);
}
foreach (var property in activityDescriptor.OutputProperties)
{
// Declare output properties to have at least a complete schema.
outputProperties.Set(property.Name, null);
}
return(inputProperties, outputProperties);
}
private async Task <ActivityDescriptor> DescribeActivity(ActivityType activityType, CancellationToken cancellationToken)
{
var activityDescriptor = await _activityTypeService.DescribeActivityType(activityType, cancellationToken);
// Filter out any non-browsable properties.
activityDescriptor.InputProperties = activityDescriptor.InputProperties.Where(x => x.IsBrowsable == true).ToArray();
return(activityDescriptor);
}
private async Task <ActivityDescriptor> DescribeActivity(ActivityType activityType, CancellationToken cancellationToken) => await _activityTypeService.DescribeActivityType(activityType, cancellationToken);