private static void WriteBackAbortMessage(WorkflowHandlerBase stateContent, string abortMessage)
{
try
{
var state = stateContent.WorkflowStatus;
if (state == WorkflowStatusEnum.Completed)
{
return;
}
// if a system message has already been persisted to the workflow content, don't overwrite it
if (!string.IsNullOrEmpty(stateContent.SystemMessages))
{
return;
}
var times = 3;
while (true)
{
try
{
stateContent.SystemMessages = abortMessage;
stateContent.DisableObserver(typeof(WorkflowNotificationObserver));
Debug.WriteLine("##WF> Workflow aborted. Reason: " + abortMessage + ". InstanceId: " + stateContent.WorkflowInstanceGuid);
using (new SystemAccount())
stateContent.Save(ContentRepository.SavingMode.KeepVersion);
break;
}
catch (NodeIsOutOfDateException ne)
{
if (--times == 0)
{
throw new NodeIsOutOfDateException("Node is out of date after 3 trying", ne);
}
var msg = "InstanceManager: Saving system message caused NodeIsOutOfDateException. Trying again.";
Logger.WriteVerbose(msg);
Debug.WriteLine("##WF> ERROR " + msg);
stateContent = (WorkflowHandlerBase)Node.LoadNodeByVersionId(stateContent.VersionId);
}
catch (Exception e)
{
var msg = String.Format("InstanceManager: Cannot write back a system message to the workflow state content. InstanceId: {0}. Path: {1}. Message: {2}. InstanceId: {3}."
, stateContent.Id, stateContent.Path, abortMessage, stateContent.WorkflowInstanceGuid);
Debug.WriteLine("##WF> ERROR " + msg);
Logger.WriteWarning(Logger.EventId.NotDefined, msg, properties: new Dictionary <string, object> {
{ "Exception", e }
});
break;
}
}
}
catch (Exception e)
{
WriteError("WriteBackAbortMessage#2", e);
throw;
}
}
//=========================================================================================================== Operations
public static Guid Start(WorkflowHandlerBase workflowInstance)
{
try
{
var wfApp = CreateWorkflowApplication(workflowInstance, WorkflowApplicationCreationPurpose.StartNew, null);
var id = wfApp.Id;
workflowInstance.WorkflowStatus = WorkflowStatusEnum.Running;
workflowInstance.DisableObserver(typeof(WorkflowNotificationObserver));
using (new SystemAccount())
workflowInstance.Save();
wfApp.Run();
return(id);
}
catch (Exception e)
{
WriteError("Start", e);
throw;
}
}
