public override void MatchFound(EventBean theEvent, ICollection <FilterHandleCallback> allStmtMatches)
{
// not receiving the remaining matches simply means we evaluate the event
if (allStmtMatches == null)
{
base.MatchFound(theEvent, null);
return;
}
EvalFilterConsumptionHandler handler = EvalFilterNode.Context.ConsumptionHandler;
ProcessMatches(handler, theEvent, allStmtMatches);
}
public static void ProcessMatches(EvalFilterConsumptionHandler handler, EventBean theEvent, ICollection <FilterHandleCallback> allStmtMatches)
{
// ignore all other callbacks for the same event
if (handler.LastEvent == theEvent)
{
return;
}
handler.LastEvent = theEvent;
// evaluate consumption for all same-pattern filters
var matches = new LinkedList <FilterHandleCallback>();
var currentConsumption = int.MinValue;
foreach (FilterHandleCallback callback in allStmtMatches)
{
if (!(callback is EvalFilterStateNodeConsume))
{
continue;
}
var node = (EvalFilterStateNodeConsume)callback;
var consumption = node.EvalFilterNode.FactoryNode.ConsumptionLevel;
if (consumption == null)
{
consumption = 0;
}
if (consumption > currentConsumption)
{
matches.Clear();
currentConsumption = consumption.Value;
}
if (consumption == currentConsumption)
{
matches.AddLast(callback);
}
}
// execute matches
foreach (FilterHandleCallback match in matches)
{
match.MatchFound(theEvent, null);
}
}