Drools Version 5.5.0 FINAL Here's the code for session setup:
KnowledgeBuilder kbuilder =
KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newClassPathResource("myrule.drl"),
ResourceType.DRL);
// Check the builder for errors
if (kbuilder.hasErrors()) {
System.out.println(kbuilder.getErrors().toString());
throw new RuntimeException("Unable to compile \"myrule.drl\".");
}
KnowledgeBase kbase = kbuilder.newKnowledgeBase();
//configure knowledge base
KnowledgeBaseConfiguration baseConfig =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
baseConfig.setOption( EventProcessingOption.STREAM );
//init session clock
KnowledgeSessionConfiguration sessionConfig =
KnowledgeBaseFactory.newKnowledgeSessionConfiguration();
sessionConfig.setOption( ClockTypeOption.get("realtime") );
//init stateful knowledge session
StatefulKnowledgeSession ksession =
kbase.newStatefulKnowledgeSession(sessionConfig, null);
And here's how I inserted the events for testing purpose:
//get Knowledge Base
StatefulKnowledgeSession ksession = initKnowledgeSession();
//entry point for sensor events
WorkingMemoryEntryPoint sensorEventStream =
ksession.getWorkingMemoryEntryPoint( "SensorEventStream" );
Room room = new Room(24);
ksession.insert(room);
System.out.println("1. fireAllRules()");
ksession.fireAllRules();
//insert events
for(int i=2;i<8;i++){
SensorEvent event = new SensorEvent("inc" + (i-1));
sensorEventStream.insert( event );
System.out.println(i + ". fireAllRules()");
ksession.fireAllRules();
Thread.sleep(1005);
}
//let thread sleep for another 1m to see if dereffered rules fire
(timers, (not) after rules)
Thread.sleep(1000*60*1);
ksession.dispose();
On 05.09.2013, at 12:02, Wolfgang Laun <[email protected]> wrote:
> Hard to believe, but who knows.
>
> Drools version and session setup, please.
>
> -W
>
>
> On 05/09/2013, Alexander Wolf <[email protected]> wrote:
>> Hey guys,
>>
>> I wrote a rule to count the SensorEvents in my KnowledgeSession that have
>> been inserted via entry-point SensorEventStream over the last 3 seconds -
>> but I only want the event to fire, if there were any events in the last 3
>> seconds at all.
>>
>> Problem: if there were no recent events, i still get the output:
>>
>>> Events in last 3 seconds: 0
>>
>> I don't really get why?! This is my rule code:
>>
>>
>> rule "slidingTimeCount"
>> when
>> $n: Number (intValue > 0) from accumulate ( $e: SensorEvent() over
>> window:time(3s) from entry-point SensorEventStream, count($e))
>> then
>> System.out.println("Events in last 3 seconds: " + $n);
>> end
>>
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