private Object[] ObtainValues(EventBean[] eventsPerStream, InternalEventRouterEntry entry, ExprEvaluatorContext exprEvaluatorContext)
{
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().QUpdateIStreamApplyAssignments(entry);
}
Object[] values = new Object[entry.Assignments.Length];
for (int i = 0; i < entry.Assignments.Length; i++)
{
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().QUpdateIStreamApplyAssignmentItem(i);
}
Object value = entry.Assignments[i].Evaluate(new EvaluateParams(eventsPerStream, true, exprEvaluatorContext));
if ((value != null) && (entry.Wideners[i] != null))
{
value = entry.Wideners[i].Invoke(value);
}
values[i] = value;
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().AUpdateIStreamApplyAssignmentItem(value);
}
}
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().AUpdateIStreamApplyAssignments(values);
}
return(values);
}
private void Apply(EventBean theEvent, EventBean[] eventsPerStream, InternalEventRouterEntry entry, ExprEvaluatorContext exprEvaluatorContext)
{
// evaluate
Object[] values;
if (entry.HasSubselect)
{
using (entry.AgentInstanceLock.AcquireWriteLock()) {
values = ObtainValues(eventsPerStream, entry, exprEvaluatorContext);
}
}
else
{
values = ObtainValues(eventsPerStream, entry, exprEvaluatorContext);
}
// apply
entry.Writer.Write(values, theEvent);
}
/// <summary>
/// Pre-proces the event.
/// </summary>
/// <param name="theEvent">to pre-process</param>
/// <param name="exprEvaluatorContext">expression evaluation context</param>
/// <returns>
/// processed event
/// </returns>
public EventBean Process(EventBean theEvent, ExprEvaluatorContext exprEvaluatorContext)
{
if (_empty)
{
return(theEvent);
}
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().QUpdateIStream(_entries);
}
EventBean oldEvent = theEvent;
bool haveCloned = false;
var eventsPerStream = new EventBean[1];
eventsPerStream[0] = theEvent;
InternalEventRouterEntry lastEntry = null;
for (int i = 0; i < _entries.Length; i++)
{
InternalEventRouterEntry entry = _entries[i];
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().QUpdateIStreamApply(i, entry);
}
ExprEvaluator whereClause = entry.OptionalWhereClause;
if (whereClause != null)
{
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().QUpdateIStreamApplyWhere();
}
var result = whereClause.Evaluate(new EvaluateParams(eventsPerStream, true, exprEvaluatorContext));
if ((result == null) || (false.Equals(result)))
{
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().AUpdateIStreamApplyWhere((bool?)result);
}
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().AUpdateIStreamApply(null, false);
}
continue;
}
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().AUpdateIStreamApplyWhere(true);
}
}
if (entry.IsDrop)
{
return(null);
}
// before applying the changes, indicate to last-entries output view
if (lastEntry != null)
{
InternalRoutePreprocessView view = lastEntry.OutputView;
if (view.IsIndicate)
{
EventBean copied = _copyMethod.Copy(theEvent);
view.Indicate(copied, oldEvent);
oldEvent = copied;
}
else
{
if (_entries[i].OutputView.IsIndicate)
{
oldEvent = _copyMethod.Copy(theEvent);
}
}
}
// copy event for the first Update that applies
if (!haveCloned)
{
EventBean copiedEvent = _copyMethod.Copy(theEvent);
if (copiedEvent == null)
{
Log.Warn("Event of type " + theEvent.EventType.Name + " could not be copied");
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().AUpdateIStreamApply(null, false);
}
return(null);
}
haveCloned = true;
eventsPerStream[0] = copiedEvent;
theEvent = copiedEvent;
}
Apply(theEvent, eventsPerStream, entry, exprEvaluatorContext);
lastEntry = entry;
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().AUpdateIStreamApply(theEvent, true);
}
}
if (lastEntry != null)
{
InternalRoutePreprocessView view = lastEntry.OutputView;
if (view.IsIndicate)
{
view.Indicate(theEvent, oldEvent);
}
}
if (InstrumentationHelper.ENABLED)
{
InstrumentationHelper.Get().AUpdateIStream(theEvent, haveCloned);
}
return(theEvent);
}
