[rules-users] global as link to DB: different results

[Michael Anstis]

I thought use of the "from" keyword allowed you to reason over facts
(potentially) not in WM. I believe the OP's example is mentioned in the
docs?

sent on the move

On 31 Oct 2011 15:08, "Wolfgang Laun" <wolfgang.laun at gmail.com> wrote:

> Globals cannot to be used - directly or indirectly - as objects that
> should trigger
> the firing of rules. It is only insert, modify or update, and retract that
> cause (re-)evaluation of LHS conditions.
>
> -W
>
> On 31 October 2011 15:05, elsdestickere <elsdestickere at yahoo.com> wrote:
>
>> Hi,
>>
>> I read docs about global and Hibernate to access your DB from the rules.
>> I tried something simular for in memory DAO's.
>> But some rules fire ("WM" in RHS) as the DAO has 3 items, but others
>> ("dao"
>> in LHS) don't, how is that possible?
>>
>> global RepositoryFactory repFact;
>> rule "dao"
>>    when
>>       k : Customer(  ) from repFact.getCustomerRepository().findAll();
>>    then
>>        System.out.println( "Drools "+drools.getRule().getName()+": "
>> +k.getName());
>> end
>> rule "WM"
>>    when
>>       k : Customer(  ) ;
>>    then
>>        System.out.println( "Drools "+drools.getRule().getName()+": "
>> +k.getName()+" + size:
>> "+repFact.getCustomerRepository().findAll().size());
>> end
>> ...
>> RepositoryFactory repFact = Registry.getRepositoryFactory();
>> ksession.setGlobal("repFact", repFact);
>> ...
>> CustomerRepository customerRepo = Registry.getRepositoryFactory()
>>                                .getCustomerRepository();
>> customerRepo.add(tom);
>> customerRepo.add(elise);
>> customerRepo.add(bert);
>> ksession.insert(bert);
>> ksession.fireAllRules();
>>
>> ...
>> Output:
>> Drools WM: Bert + size: 3
>>
>> br,
>> Els
>>
>>
>> --
>> View this message in context:
>> http://drools.46999.n3.nabble.com/global-as-link-to-DB-different-results-tp3467897p3467897.html
>> Sent from the Drools: User forum mailing list archive at Nabble.com.
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20111031/94d2c073/attachment.html