Tried, but won't work.

Ok, step by step.

1- DRL File

Event declared, FirstRule won't work and SecondRule is working properly
(neither count or sum)

declare StateEvent
       @role( event )
end

rule "FirstRule"

when
       Number( $total : doubleValue ) from accumulate(
       StateEvent(itemName=="Temperatura", $val : newState) over
window:length( 5 ),
       count ( 1 ))
then
   System.out.println("" + $total);
end

rule "SecondRule "

when
       StateEvent(itemName=="Temperatura", $val : newState)
then
       System.out.println("" +
((DecimalType)$val).toBigDecimal().doubleValue());
end

2. Important lines from Engine starting (notice that i'm using stateful
session)

KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();

kbuilder.add(ResourceFactory.newClassPathResource(RULES_CHANGESET,
getClass()), ResourceType.CHANGE_SET);

KnowledgeBaseConfiguration kbaseConfig =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
kbaseConfig.setOption( EventProcessingOption.STREAM );
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(kbaseConfig);

StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();

3. Attached you can find the full code
http://drools.46999.n3.nabble.com/file/n3703619/RuleService.java
RuleService.java

4. Environment

Drools 5.3.0 FINAL, running on a OSGi environment.





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