public void FindMissingEvent(Object sender, UpdateEventArgs e)
{
var oldEvents = e.OldEvents;
if (oldEvents == null)
{
// we don't care about events entering the window (new events)
// this is because we must wait for C to arri
return;
}
// Missing C events can be reported either through A or through B
// We assume that duplicates are ok, if not, then streams A and B could be joined and then fed,
// or duplicates could be removed via another statement as well.
TxnEventA eventA = (TxnEventA)oldEvents[0]["A"];
TxnEventB eventB = (TxnEventB)oldEvents[0]["B"];
if (eventA != null)
{
Log.Debug("Missing TxnEventC event detected for TxnEventA " + eventA);
}
else
{
Log.Debug("Missing TxnEventC event detected for TxnEventB " + eventB);
}
}
protected List <TxnEventBase> CreateNextTransaction()
{
List <TxnEventBase> t = new List <TxnEventBase>();
long beginningStamp = DateTimeHelper.CurrentTimeMillis;
//skip event 1 with probability 1 in 5000
if (random.Next(5000) < 4998)
{
TxnEventA txnEventA = new TxnEventA(null, beginningStamp, fieldGenerator.GetRandomCustomer());
t.Add(txnEventA);
}
long e2Stamp = fieldGenerator.randomLatency(beginningStamp);
//skip event 2 with probability 1 in 1000
if (random.Next(1000) < 9998)
{
TxnEventB txnEventB = new TxnEventB(null, e2Stamp);
t.Add(txnEventB);
}
long e3Stamp = fieldGenerator.randomLatency(e2Stamp);
//skip event 3 with probability 1 in 10000
if (random.Next(10000) < 9998)
{
TxnEventC txnEventC = new TxnEventC(null, e3Stamp, fieldGenerator.GetRandomSupplier());
t.Add(txnEventC);
}
else
{
Log.Debug(".createNextTransaction generated missing event");
}
return(t);
}