async Task IRuntimeWorkflowEngine.SendEventToNestedWorkflows(ActivityExecutionContext activityExecutionContext, Guid workflowId, string code, CancellationToken cancellationToken)
{
Guard.ArgumentNotNullOrEmpty(code, nameof(code));
// obtain all the workflow instances of a specified nested workflow class
var nestedWorkflowInstancesEnumerable = await WorkflowEngineBuilder.WorkflowStore.GetNestedWorkflowInstances(
activityExecutionContext.StateExecutionContext.WorkflowContext.WorkflowInstance.Id, workflowId, cancellationToken).ConfigureAwait(false);
if (null == nestedWorkflowInstancesEnumerable)
{
return;
}
var nestedWorkflowInstances = nestedWorkflowInstancesEnumerable.ToList();
if (nestedWorkflowInstances.Count == 0)
{
return;
}
foreach (var nestedWorkflowInstance in nestedWorkflowInstances)
{
var parentToNestedEvent = new ParentToNestedEntityEvent(code, WorkflowHierarchyEventType.Application,
nestedWorkflowInstance.RootWorkflowInstanceId, nestedWorkflowInstance.ParentWorkflowInstanceId, nestedWorkflowInstance, null);
await PulseToNestedWorkflow(activityExecutionContext.StateExecutionContext.WorkflowContext, parentToNestedEvent, cancellationToken).ConfigureAwait(false);
}
}
private Task <WorkflowProcessingResult> InitiateNestedWorkflowInternal(IWorkflowInstance workflowInstance, Guid nestedWorkflowId, IEntity nestedEntity, CancellationToken cancellationToken = default)
{
var parentToNestedEvent = new ParentToNestedEntityEvent(EventTypeConfiguration.ParentToNestedInitial.ToString("G"),
WorkflowHierarchyEventType.Initialize,
workflowInstance.RootWorkflowInstanceId, workflowInstance.Id, default(Guid), nestedEntity);
return(((IWorkflowEngine)this).ProcessEvent(nestedWorkflowId, parentToNestedEvent, cancellationToken));
}
private Task PulseToNestedWorkflow(WorkflowContext workflowContext, ParentToNestedEntityEvent parentToNestedEntityEvent, CancellationToken cancellationToken = default)
{
// [Assumption #1] Failed event should be propagated with no additional checks for validity
if (parentToNestedEntityEvent.HierarchyEventType == WorkflowHierarchyEventType.Failed)
{
return(((IWorkflowEngine)this).ProcessEvent(parentToNestedEntityEvent.TargetWorkflowInstance.WorkflowId, parentToNestedEntityEvent, cancellationToken));
}
// [Assumption #2] Nested workflow instance must be in [AwaitingEvent] state for application scope events to pass through
if (parentToNestedEntityEvent.HierarchyEventType == WorkflowHierarchyEventType.Application &&
parentToNestedEntityEvent.TargetWorkflowInstance.CurrentStateProgress != StateExecutionProgress.AwaitingEvent)
{
throw new WorkflowException(string.Format(CultureInfo.InvariantCulture,
"Nested Workflow instance [ID={0:D}] must be waiting for an event from parent workflow instance [ID={1:D}], but it is in [State={2}..{3:G}]",
parentToNestedEntityEvent.TargetWorkflowInstance.Id, workflowContext.WorkflowInstance.Id, parentToNestedEntityEvent.TargetWorkflowInstance.CurrentStateCode,
parentToNestedEntityEvent.TargetWorkflowInstance.CurrentStateProgress));
}
return(((IWorkflowEngine)this).ProcessEvent(parentToNestedEntityEvent.TargetWorkflowInstance.WorkflowId, parentToNestedEntityEvent, cancellationToken));
}
private async Task PulseFailedToNestedWorkflows(WorkflowContext workflowContext, CancellationToken cancellationToken)
{
// all the workflow instances of all the nested workflow classes ==> need to move to failed state
var nestedWorkflowInstancesEnumerable = await WorkflowEngineBuilder.WorkflowStore.GetNestedWorkflowInstances(workflowContext.WorkflowInstance.Id, cancellationToken).ConfigureAwait(false);
if (null == nestedWorkflowInstancesEnumerable)
{
return;
}
var nestedWorkflowInstances = nestedWorkflowInstancesEnumerable.ToList();
if (nestedWorkflowInstances.Count == 0)
{
return;
}
foreach (var nestedWorkflowInstance in nestedWorkflowInstances)
{
var parentToNestedFailedEvent = new ParentToNestedEntityEvent(EventTypeConfiguration.ParentToNestedFailed.ToString("G"), WorkflowHierarchyEventType.Failed,
nestedWorkflowInstance.RootWorkflowInstanceId, nestedWorkflowInstance.ParentWorkflowInstanceId, nestedWorkflowInstance, null);
await PulseToNestedWorkflow(workflowContext, parentToNestedFailedEvent, cancellationToken).ConfigureAwait(false);
}
}
