private async Task FinilizeQueueWork(int NumOfDeqeuedMsgs, string qName, IReliableQueue <Wi> q)
{
long LastCheckedVal;
if (null == q)
{
// this executer tried to get q and failed.
// typically this happens when # of executers > q
// check for decrease workers
this.m_WorkManager.m_DeferedTaskExec.AddWork(this.m_WorkManager.TryDecreaseExecuters);
return;
}
bool bMoreMessages = NumOfDeqeuedMsgs > this.m_WorkManager.YieldQueueAfter;
bool bEmptyQ = !(q.Count() > 0);
if (bMoreMessages || !bEmptyQ) // did we find messages in the queue
{
this.m_WorkManager.m_TraceWriter.TraceMessage(string.Format("queue:{0} pushed back to queues, queue still have more work", qName));
this.leaveQ(qName, true);
}
else
{
long now = DateTime.UtcNow.Ticks;
// was queue previously empty?
bool bCheckedBefore = this.m_WorkManager.m_QueueManager.m_SuspectedEmptyQueues.TryGetValue(qName, out LastCheckedVal);
// Q was in suspected empty queue and has expired
if (bCheckedBefore && ((now - LastCheckedVal) > this.m_WorkManager.m_RemoveEmptyQueueAfterTicks))
{
this.m_WorkManager.m_TraceWriter.TraceMessage(string.Format("queue:{0} confirmed empty, and will be removed", qName));
// remove it from suspected queue
this.m_WorkManager.m_QueueManager.m_SuspectedEmptyQueues.TryRemove(qName, out LastCheckedVal);
// remove from the queue list
await this.m_WorkManager.m_QueueManager.RemoveQueueAsync(qName);
// remove asscioated handler
this.m_WorkManager.m_DeferedTaskExec.AddWork(() => this.m_WorkManager.RemoveHandlerForQueue(qName));
// modify executers to reflect the current state
this.m_WorkManager.m_DeferedTaskExec.AddWork(this.m_WorkManager.TryDecreaseExecuters);
}
else
{
this.m_WorkManager.m_TraceWriter.TraceMessage(
string.Format("queue:{0} pushed back to queues and flagged as an empty queue suspect ", qName));
// the queue was not a suspect before, or has not expired
this.m_WorkManager.m_QueueManager.m_SuspectedEmptyQueues.AddOrUpdate(qName, now, (k, v) => { return(v); });
this.leaveQ(qName, false);
}
}
}
