private static IEnumerable <string> GetInboundActivityPathInternal(this ICompositeActivityBlueprint workflowBlueprintBlueprintInstance, string activityId, HashSet <string> inspectedActivityIds)
{
foreach (var connection in workflowBlueprintBlueprintInstance.GetInboundConnections(activityId))
{
// Circuit breaker: Detect workflows that implement repeating flows to prevent an infinite loop here.
if (inspectedActivityIds.Contains(connection.Source.Activity.Id))
{
yield break;
}
yield return(connection.Source.Activity.Id);
foreach (var parentActivityId in workflowBlueprintBlueprintInstance.GetInboundActivityPathInternal(connection.Source.Activity.Id, inspectedActivityIds).Distinct())
{
inspectedActivityIds.Add(parentActivityId);
yield return(parentActivityId);
}
}
}
/// <summary>
/// Returns the full path of incoming activities.
/// </summary>
public static IEnumerable <string> GetInboundActivityPath(this ICompositeActivityBlueprint workflowBlueprint, string activityId)
{
var inspectedActivityIds = new HashSet <string>();
return(workflowBlueprint.GetInboundActivityPathInternal(activityId, inspectedActivityIds).Distinct().ToList());
}
