// Called by derived classes to set up event pipeline subscriptions
protected bool Start(
IObservable <IDictionary <string, object> > eventStream,
string eventStreamName,
bool realTimeMode,
ISubject <IDictionary <string, object> > subject = null)
{
_eventStream = eventStream;
// Sending event stream to next stage in event pipeline
if (subject != null)
{
// Input stream goes to custom actions
_intermediateSubscription = _eventStream.Subscribe(subject.OnNext, subject.OnError, subject.OnCompleted);
// Custom actions go to output
_outputSubscription = subject.Subscribe(_output.OutputAction, _output.OutputError, Stop);
}
else if (_queries == null || _queries.Length == 0 || string.IsNullOrEmpty(_queries[0]))
{
// Input stream goes straight to output
_outputSubscription = _eventStream.Subscribe(_output.OutputAction, _output.OutputError, Stop);
}
else
{
// Input stream goes through Rx.Kql before hitting output
_eventProcessor = new EventProcessor(
_eventStream, eventStreamName,
_output,
realTimeMode,
_queries);
return(_eventProcessor.ApplyRxKql());
}
return(true);
}
protected EventComponent(IOutput output, params string[] queries)
{
_running = true;
_output = output;
_queries = queries;
_eventStream = null;
_eventProcessor = null;
_outputSubscription = null;
_intermediateSubscription = null;
// Setting up clean-up code for exit
_cancelEventHandler = delegate(object sender, ConsoleCancelEventArgs eventArgs) {
if (_running)
{
Stop();
}
else
{
Console.CancelKeyPress -= _cancelEventHandler;
}
};
Console.CancelKeyPress += _cancelEventHandler;
}
