[rules-users] Help with StatefulSession and Stream Mode

[Nestor Tarin Burriel]

Hi Ric,

The method fireAllRules shouldn't block you ... I'm also using similar rules
and similar fact inyection system and the fireAllRules never block me ...
isnt it?

2009/11/13 richarda <richard.ambridge at gmail.com>

>
> I may have solved this, but still not sure I am doing this 'correctly'
>
> I have changed this to use one call to fireUntilHalt()
> and then from the insert code it now inserts the fact and runs:
>                ksession.startProcess("rulesflow");
> (and no fireAllRules)
>
> which seems to bring the engine to life again..
>
> Is this correct?
>
>
> richarda wrote:
> >
> > Hi all,
> >
> >  I am stuck trying to understand how to setup my drools system..
> >
> >  I am using Stream mode, with some negative rules, and a continuous
> stream
> > of facts.
> > Facts are evaluated and will in turn insert events into the memory if
> > required.
> >
> > I thought it would be like this:
> > First, setup,
> >
> > KnowledgeBaseConfiguration conf =
> > KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
> > conf.setOption(EventProcessingOption.STREAM);
> > KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(conf);
> > kbase.addKnowledgePackages(builder.getKnowledgePackages());
> > ksession = kbase.newStatefulKnowledgeSession();
> >
> > Then we have ksession...
> > The code that handles an incoming message will have a reference to
> > ksession..
> > and it will run:
> >
> > WorkingMemoryEntryPoint eStream =
> > ksession.getWorkingMemoryEntryPoint("MessageStream");
> > eStream.insert(msg);
> > ksession.fireAllRules();
> >
> > but here is my problem...
> > as some rules have things like  not(Event(this after [0s,90m] $a))
> > then the fireAllRules can wait for the 90minutes to pass before
> > completing..
> >
> > How do I do it so that there is one WorkingMemory,
> > and I can pump facts into that memory and the engine just keeps running
> > and my 'inputter' doesn't hang..?
> >
> > Thanks
> > Ric
> >
> >
>
> --
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>
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