static void HandleComplete(ValkWFStep Step)
{
string reply = "";
for (int i = 0; i < Step.NextSteps.Count; i++)
{
ValkWFStep NextStep = Step.NextSteps[i];
if (!NextStep.Skip)
{
if (NextStep.SyncCount > 1)
{
UpdateSyncCounts(NextStep);
}
else
{
//no waiting!
ValkQueueWFMessage WFMessage = new ValkQueueWFMessage();
NextStep.Status = "active";
WFMessage.Command = ValkQueueWFMessage.WFCommand.WFC_ACTIVATE;
WFMessage.Step = NextStep;
WFMessage.InstanceKey = NextStep.InstanceKey;
QueueDBHandlerComm.Send <ValkQueueWFMessage>(WFMessage);
reply = QueueDBHandlerComm.Recv(Encoding.Unicode);
ActiveSteps.Add(NextStep);
}
}
else
{
//we may need to update wait counts here
//update database
ValkQueueWFMessage WFMessage = new ValkQueueWFMessage();
NextStep.Status = "skip";
WFMessage.Step = NextStep;
WFMessage.InstanceKey = NextStep.InstanceKey;
WFMessage.Command = ValkQueueWFMessage.WFCommand.WFC_SKIP;
QueueDBHandlerComm.Send <ValkQueueWFMessage>(WFMessage);
reply = QueueDBHandlerComm.Recv(Encoding.Unicode);
//TODO: update sync counts of children, recursively, will need to look for new activates as well
//probably doesn't need to be recursive because the system will handle it as the children complete
//will need to recurse (or re-insert) for children where this is the only parent to set them to skip
// use inproc://queueself and create a new message channel to send messages directly back to itself?
// --this won't work, because they will wait for (or expect) a reply on the other side, but its one thread
}
Step.NextSteps[i] = NextStep;
}
//todo remember to remove from active list
for (int i = 0; i < ActiveSteps.Count; i++)
{
if (ActiveSteps[i].WFTemplateID == Step.WFTemplateID &&
ActiveSteps[i].WFTemplateStepID == Step.WFTemplateStepID &&
ActiveSteps[i].InstanceKey == Step.InstanceKey)
{
ActiveSteps.RemoveAt(i);
//step back since the count changed and the next one will be one behind
i--;
}
}
}
static void ValkWFActivator_PollInHandler(Socket socket, IOMultiPlex revents)
{
//handle workflow instantiations
ValkQueueWFMessage WFMessage = socket.Recv <ValkQueueWFMessage>();
if (WFMessage.Command == ValkQueueWFMessage.WFCommand.WFC_LOAD)
{
ValkWFStep NewInstance = null;
//Console.WriteLine("Instance Insert Request Received: " + WFMessage.InstanceID + " " + WFMessage.InstanceKey);
if (!LoadedInstances.Contains(WFMessage.InstanceID))
{
LoadedInstances.Add(WFMessage.InstanceID);
SortedDictionary <int, ValkWFStep> ToInsert = new SortedDictionary <int, ValkWFStep>();
dbHandler.StartWFInstance(WFMessage.InstanceID);
if (LoadedActiveInstanceByType.ContainsKey(WFMessage.InstanceType))
{
NewInstance
= LoadedInstanceTemplates[LoadedActiveInstanceByType[WFMessage.InstanceType]].DeepClone <ValkWFStep>();
BuildInsertWFInstance(ToInsert, NewInstance, WFMessage.InstanceKey, true);
//Console.WriteLine(DateTime.Now.ToLongTimeString() + ": Created New Instance: " + WFMessage.InstanceKey);
}
else
{
//error, no WF of this type found active
}
if (ToInsert.Count > 0)
{
InsertWFInstance(ToInsert);
ValkQueueWFMessage QueueMessage = new ValkQueueWFMessage();
QueueMessage.InstanceID = WFMessage.InstanceID;
QueueMessage.InstanceKey = WFMessage.InstanceKey;
QueueMessage.InstanceType = WFMessage.InstanceType;
QueueMessage.Command = ValkQueueWFMessage.WFCommand.WFC_ACTIVATE;
QueueMessage.Step = NewInstance;
QueueComm.Send <ValkQueueWFMessage>(QueueMessage);
string reply = QueueComm.Recv(Encoding.Unicode);
}
socket.Send("OK", Encoding.Unicode);
}
else
{ //else don't do anything, duplicate message
socket.Send("WARN-Duplicate Request", Encoding.Unicode);
}
}
else
{
//log error message
socket.Send("ERROR-Wrong Request Type", Encoding.Unicode);
}
}
private static void LoadChildren(ValkWFStep CurrentStep, IDatabaseHandler dbHandler)
{
List <ValkWFStep> Children = dbHandler.LoadChildSteps(CurrentStep);
//do children loading outside, here
for (int i = 0; i < Children.Count(); i++)
{
ValkWFStep substep = Children[i];
LoadChildren(substep, dbHandler);
Children[i] = substep;
}
CurrentStep.NextSteps = Children;
}
private static void LoadWorkflowTemplates(IDatabaseHandler dbHandler)
{
//WorkFlowTemplates
//list to store loads to help reduce recursive SQL queries
WFTemplateLoadingData loadingData = dbHandler.LoadWFTemplates();
LoadedActiveInstanceByType = loadingData.LoadedActiveInstanceByType;
for (int i = 0; i < loadingData.WFsToLoad.Count(); i++)
{
ValkWFStep CurrentStep = loadingData.WFsToLoad[i];
LoadChildren(CurrentStep, dbHandler);
loadingData.WFsToLoad[i] = CurrentStep;
LoadedInstanceTemplates[loadingData.WFsToLoad[i].WFTemplateID] = loadingData.WFsToLoad[i];
}
Console.WriteLine("Workflows Loaded");
}
/// <summary>
/// utility function to determine if this step currently has any sync counts
/// </summary>
/// <param name="Step"></param>
/// <returns></returns>
static bool SyncWaitExists(ValkWFStep Step)
{
bool Exists = false;
if (StepsWithSyncWait.ContainsKey(Step.WFTemplateID))
{
if (StepsWithSyncWait[Step.WFTemplateID].ContainsKey(Step.WFTemplateStepID))
{
if (StepsWithSyncWait[Step.WFTemplateID][Step.WFTemplateStepID].ContainsKey(Step.InstanceKey))
{
Exists = true;
}
}
}
return(Exists);
}
/// <summary>
/// Creates all child-steps of a workflow instance (recursively) so that the entire flow can be inserted
/// prior to being set active.
/// </summary>
/// <param name="ToInsert"></param>
/// <param name="Step"></param>
/// <param name="InstanceID"></param>
/// <param name="insert"></param>
static void BuildInsertWFInstance(SortedDictionary <int, ValkWFStep> ToInsert, ValkWFStep Step, string InstanceID, bool insert)
{
Step.InstanceKey = InstanceID;
if (insert && !ToInsert.ContainsKey(Step.WFTemplateStepID))
{
ToInsert[Step.WFTemplateStepID] = Step;
}
else
{
insert = false;
}
for (int i = 0; i < Step.NextSteps.Count; i++)
{
ValkWFStep substep = Step.NextSteps[i];
BuildInsertWFInstance(ToInsert, substep, InstanceID, insert);
Step.NextSteps[i] = substep;
}
}
/// <summary>
/// Steps can be programatically skipped (not all paths in a workflow are followed)
/// This function updates the synccount of any children to include the skipped
/// step as "complete"
/// </summary>
/// <param name="Step">Step being skipped</param>
static void UpdateSkip(ref ValkWFStep Step)
{
for (int i = 0; i < Step.NextSteps.Count; i++)
{
ValkWFStep substep = Step.NextSteps[i];
substep.SyncCount--;
if (substep.SyncCount == 0)
{
substep.Skip = true;
UpdateSkip(ref substep);
}
else
{
UpdateSyncCounts(substep);
}
Step.NextSteps[i] = substep;
}
}
static void UpdateSyncCounts(ValkWFStep NextStep)
{
string reply = "";
NextStep.SyncCount--;
//TODO: update sync count in the DB
if (SyncWaitExists(NextStep))
{
StepsWithSyncWait[NextStep.WFTemplateID][NextStep.WFTemplateStepID][NextStep.InstanceKey].SyncCount--;
//if we're no longer waiting, set this step to active
if (StepsWithSyncWait[NextStep.WFTemplateID][NextStep.WFTemplateStepID][NextStep.InstanceKey].SyncCount <= 0)
{
ValkQueueWFMessage WFMessage = new ValkQueueWFMessage();
NextStep.Status = "active";
WFMessage.Command = ValkQueueWFMessage.WFCommand.WFC_ACTIVATE;
WFMessage.Step = NextStep;
WFMessage.InstanceKey = NextStep.InstanceKey;
QueueDBHandlerComm.Send <ValkQueueWFMessage>(WFMessage);
reply = QueueDBHandlerComm.Recv(Encoding.Unicode);
ActiveSteps.Add(NextStep);
}
}
else
{
if (!StepsWithSyncWait.ContainsKey(NextStep.WFTemplateID))
{
StepsWithSyncWait[NextStep.WFTemplateID] = new SortedDictionary <int, SortedDictionary <string, ValkWFStep> >();
}
if (!StepsWithSyncWait[NextStep.WFTemplateID].ContainsKey(NextStep.WFTemplateStepID))
{
StepsWithSyncWait[NextStep.WFTemplateID][NextStep.WFTemplateStepID] = new SortedDictionary <string, ValkWFStep>();
}
StepsWithSyncWait[NextStep.WFTemplateID][NextStep.WFTemplateStepID][NextStep.InstanceKey] = NextStep.DeepClone();
StepsWithSyncWait[NextStep.WFTemplateID][NextStep.WFTemplateStepID][NextStep.InstanceKey].SyncCount--;
}
}