Hi guys, we are currently working with Drools Fusion in order to build a complex event processing solution. We've modelled our events using and object (Event) and this object is shared with everyone that needs to publish and event. Our scenario goes this way 1) Our shared class, located in *ar.com.fluxit.Event* 2) An example of our cep rules declared in package *rules.flux* package *rules.flux* import *ar.com.fluxit.Event;* declare *Event* @role (event) @expires(1m) end rule "hello world" when $event:Event( eventName == "Hello World") from entry-point "* rules.flux*" then System.out.println("Hello world"); end 3) When we try to insert a *ar.com.fluxit.Event *as a fact in entry point "rules.flux" Drools Fusion throws a NullPointerException. If you read Drools Expert documentation ( http://docs.jboss.org/drools/release/5.2.0.Final/drools-expert-docs/html/... - Accessing Declared Types from the Application Code) you find this paragraph: "The first important thing to realize is that a declared fact will belong to the package where it was declared. So, for instance, in the example below, Person will belong to the org.drools.examples package, and so the fully qualified name of the generated class will be org.drools.examples.Person." When we change package declaration to *package ar.com.fluxit *everything works like a charm. But in our cep scenario we need that our ar.com.fluxit.Event object to be user by all rules declared in any package. So, there goes the question. There is a workaround for this? This is a bug? Any help would be very appreciated Cheers -- Joaquín Díaz Vélez Flux IT SA Calle 9 N° 865 - Paseo La Panadería - Planta Alta La Plata - Buenos Aires - Argentina Teléfono (+54) 221 553 2980 int 306 Móvil (+54) 9221 5863322 www.fluxit.com.ar _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

W, thanks for your reply. The Event fields are all complete and initialized. If I change the rule package to the one in Event (let's say "package-name(rule) == package-name(Event)") everything works like a charm. I'll give you more details about the NPE. Happends in this class: org.drools.reteoo.ReteooFactHandleFactory, method: protected final InternalFactHandle newFactHandle(final int id, final Object object, final long recency, *final ObjectTypeConf conf,* final InternalWorkingMemory workingMemory, final WorkingMemoryEntryPoint wmEntryPoint) { if ( conf != null && conf.isEvent() ) { * TypeDeclaration type = conf.getTypeDeclaration();* long timestamp; * if ( type.getTimestampExtractor() != null ) { --> NPE here, because type is null* if ( Date.class.isAssignableFrom( type.getTimestampExtractor().getExtractToClass() ) ) { timestamp = ((Date) type.getTimestampExtractor().getValue( workingMemory, object )).getTime(); (...) etc } So, *type *is null (shouldn't be). I debugged the execution and I found that ObjectTypeConfigurationRegistry is holding this instance of *conf.* Any ideas? Thanks in advance 2012/2/9 Wolfgang Laun <wolfgang.laun(a)gmail.com&gt; > The NPE during insertion is highly suggestive of another problem. Even if > there were two Event classes (one the pojo, the other one the declared one) > there should not be a NPE; the "hello world" rule simply would not fire. > Are all fields - especially eventName - properly initialized before that > fact is inserted? > > -W > > 2012/2/9 Joaquín Díaz Vélez <joaquin.diazvelez(a)fluxit.com.ar&gt; > >> Hi guys, >> >> we are currently working with Drools Fusion in order to >> build a complex event processing solution. We've modelled our events using >> and object (Event) and this object is shared with everyone that needs to >> publish and event. >> >> Our scenario goes this way >> >> 1) Our shared class, located in *ar.com.fluxit.Event* >> >> 2) An example of our cep rules declared in package *rules.flux* >> >> package *rules.flux* >> >> import *ar.com.fluxit.Event;* >> >> declare *Event* >> @role (event) >> @expires(1m) >> end >> >> rule "hello world" >> when >> $event:Event( eventName == "Hello World") from entry-point "* >> rules.flux*" >> then >> System.out.println("Hello world"); >> end >> >> >> 3) When we try to insert a *ar.com.fluxit.Event *as a fact in entry >> point "rules.flux" Drools Fusion throws a NullPointerException. If you read >> Drools Expert documentation ( >> http://docs.jboss.org/drools/release/5.2.0.Final/drools-expert-docs/html/... >> - >> Accessing Declared Types from the Application Code) you find this >> paragraph: >> "The first important thing to realize is that a declared fact will >> belong to the package where it was declared. So, for instance, in the >> example below, Person will belong to the org.drools.examples package, >> and so the fully qualified name of the generated class will be >> org.drools.examples.Person." >> >> When we change package declaration to *package ar.com.fluxit *everything >> works like a charm. But in our cep scenario we need that our >> ar.com.fluxit.Event object to be user by all rules declared in any package. >> >> So, there goes the question. There is a workaround for this? This is a >> bug? >> >> Any help would be very appreciated >> >> >> Cheers >> >> >> -- >> Joaquín Díaz Vélez >> >> Flux IT SA >> Calle 9 N° 865 - Paseo La Panadería - Planta Alta >> La Plata - Buenos Aires - Argentina >> Teléfono (+54) 221 553 2980 int 306 >> Móvil (+54) 9221 5863322 >> www.fluxit.com.ar >> >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- Joaquín Díaz Vélez Flux IT SA Calle 9 N° 865 - Paseo La Panadería - Planta Alta La Plata - Buenos Aires - Argentina Teléfono (+54) 221 553 2980 int 306 Móvil (+54) 9221 5863322 www.fluxit.com.ar _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users