protected virtual Yield Invoke()
{
EventItem eventItem;
if (filter.Receive(out eventItem))
{
switch ((EventType)eventItem.EventType)
{
case EventType.Shutdown:
Dispose();
filter.Pop();
break;
default:
throw new ApplicationException("Unexpected event: " + eventItem);
}
}
var result = Yield.NoWork.Repeat;
try {
if (writeQueue.Count == 0)
{
return(result);
}
while (writeQueue.Count > 0)
{
if (!writeQueue.TryPeek(ref tick))
{
break;
}
tickIO.Inject(tick);
if (tickFile.TryWriteTick(tickIO))
{
writeQueue.TryDequeue(ref tick);
}
result = Yield.DidWork.Repeat;
}
return(result);
} catch (QueueException ex) {
if (ex.EntryType == EventType.Terminate)
{
log.Notice("Last tick written: " + tickIO);
if (debug)
{
log.Debug("Exiting, queue terminated.");
}
Finalize();
return(Yield.Terminate);
}
else
{
Exception exception = new ApplicationException("Queue returned unexpected: " + ex.EntryType);
writeQueue.SetException(exception);
writeQueue.Dispose();
Dispose();
throw ex;
}
} catch (Exception ex) {
writeQueue.SetException(ex);
writeQueue.Dispose();
Dispose();
throw;
}
}