[rules-users] Collect and hibernate

[Edson Tirelli]

   You must be having a problem with the hibernate query then. Just as a
test, try replacing the query call with an arbitrary method call that
returns a couple objects.

   Edson



2009/10/29 richarda <richard.ambridge at gmail.com>

>
> Using Drools 5.0.1
>
> I get the same results with the below rule.
> I leave the System.out.println in,  and the rule executes the number of
> times for the number of items that should be loaded from the hibernate,
> but each time the $o is still null.
>
> the insert seems to be ignored, audit shows no record of it,  but I assume
> insert(null)  is ignored by drools
>
>
> Edson Tirelli-4 wrote:
> >
> >     Did you tried this?
> >
> >        when
> >                 $m : MessageAsEvent(uuid=="mesC:7")
> >                 $o :  MessageAsEvent(uuid=="mesC:7", id!=$m.id) from
> > hibernateSession.createQuery("from MessageAsEvent where
> > serial=?").setParameter(0,$m.serial).list()
> >        then
> >                 insert($o)
> >        end
> >
> >     In any case, collect should work too. Which version of drools are you
> > using?
> >
> >     []s
> >     Edson
> >
> > 2009/10/29 richarda <richard.ambridge at gmail.com>
> >
> >>
> >> Hi again,
> >>
> >> I wish to have a rule that when an Event has a certain uuid then load
> >> into
> >> working memory all other events that have been received for this unit...
> >>
> >> So I write the rule:
> >>
> >> rule "Repeating"
> >>
> >>        when
> >>                 $m : MessageAsEvent(uuid=="mesC:7")
> >>                 $others : LinkedList() from collect (
> >>                           MessageAsEvent(uuid=="mesC:7", id!=$m.id)
> >>                               from hibernateSession.createQuery("from
> >> MessageAsEvent where
> >> serial=?").setParameter(0,$m.serial).list()
> >>                        )
> >>        then
> >>                System.out.println("Gathering m="+$m+" data="+$others);
> >> end
> >>
> >>
> >> Audit log shows: (wish cut and paste would work from Eclipse audit view)
> >>
> >>  <activationId>Repeating [131, 14]</activationId>
> >>  <rule>Repeating FAN</rule>
> >>  <declarations>$others=[MessageAsEvent:[124] uuid=mesC:7
> serial=serial123
> >> count=7, MessageAsEvent:[94] uuid=mesC:7 serial=serial123 count=7,
> >> MessageAsEvent:[64] uuid=mesC:7 serial=serial123 count=7,
> >> MessageAsEvent:[118] uuid=mesC:7 serial=serial123 count=7,
> >> MessageAsEvent:[112] uuid=mesC:7 serial=serial123 count=7,
> >> MessageAsEvent:[106] uuid=mesC:7 serial=serial123 count=7,
> >> MessageAsEvent:[100] uuid=mesC:7 serial=serial123 count=7,
> >> MessageAsEvent:[88] uuid=mesC:7 serial=serial123 count=7,
> >> MessageAsEvent:[82] uuid=mesC:7 serial=serial123 count=7,
> >> MessageAsEvent:[76] uuid=mesC:7 serial=serial123 count=7,
> >> MessageAsEvent:[70] uuid=mesC:7 serial=serial123 count=7,
> >> MessageAsEvent:[58] uuid=mesC:7 serial=serial123 count=7,
> >> MessageAsEvent:[52] uuid=mesC:7 serial=serial123 count=7,
> >> MessageAsEvent:[46] uuid=mesC:7 serial=serial123 count=7,
> >> MessageAsEvent:[40] uuid=mesC:7 serial=serial123 count=7,
> >> MessageAsEvent:[34] uuid=mesC:7 serial=serial123 count=7](131);
> >> $m=MessageAsEvent:[130] uuid=mesC:7 serial=serial123
> >> count=7(14)</declarations>
> >>  <ruleFlowGroup>Gathering</ruleFlowGroup>
> >>
> >>
> >>
> >> So, you can see that the rule fired with $others having all the data,
> >> and
> >> $m being the main uuid
> >>
> >>
> >> but the output of the rule is:
> >> Gathering m=MessageAsEvent:[130] uuid=mesC:7 serial=serial123 count=7
> >> data=null
> >>
> >> so, the $others has been translated to a null.
> >>
> >> I'm trying to copy the Expert example:
> >>
> >> import java.util.LinkedList;
> >>
> >> rule "Send a message to all mothers"
> >> when
> >>    $town : Town( name == 'Paris' )
> >>    $mothers : LinkedList()
> >>               from collect( Person( gender == 'F', children > 0 )
> >>                             from $town.getPeople()
> >>                           )
> >> then
> >>    # send a message to all mothers
> >> end
> >>
> >> which indicates that $mothers will be available in the RHS
> >>
> >> for reference, the audit log shows when the rule fires:
> >>
> >>
> >> <org.drools.audit.event.ActivationLogEvent>
> >>  <type>6</type>
> >>  <activationId>Repeating [-1, 14]</activationId>
> >>  <rule>Repeating FAN</rule>
> >>  <declarations>$m=MessageAsEvent:[130] uuid=mesC:7 serial=serial123
> >> count=7(14)</declarations>
> >>  <ruleFlowGroup>Gathering</ruleFlowGroup>
> >>
> >>
> >> What am I doing wrong?
> >> I basically want all the MessageAsEvent added to working memory, so
> later
> >> other rules will do work on all the events.
> >>
> >> Cheers
> >> Ric
> >>
> >> --
> >> View this message in context:
> >> http://www.nabble.com/Collect-and-hibernate-tp26112042p26112042.html
> >> Sent from the drools - user mailing list archive at Nabble.com.
> >>
> >> _______________________________________________
> >> rules-users mailing list
> >> rules-users at lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >
> >
> >
> > --
> >  Edson Tirelli
> >  JBoss Drools Core Development
> >  JBoss by Red Hat @ www.jboss.com
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/Collect-and-hibernate-tp26112042p26113182.html
> Sent from the drools - user mailing list archive at Nabble.com.
>
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-- 
 Edson Tirelli
 JBoss Drools Core Development
 JBoss by Red Hat @ www.jboss.com
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