9:06 a.m.
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>
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>
> 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
>
>
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--
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