So, Do you mean that for serializing the state of a StatefulKnowledgeSession we must include our rules into a ruleflow? How do you upgrade your KnowledgeBase without loosing the WM state?
Please check this issues: https://jira.jboss.org/jira/browse/JBRULES-1946 https://jira.jboss.org/jira/browse/JBRULES-2278 Nestor 2009/11/7 Andrew Waterman <andrew.water...@gmail.com> > It can depend on how you want to use working memory as well. If you are > working statelessly, you can load objects through some type of transactional > framework, insert them into memory (or the ones relevant to you at that > moment in time) let Drools evaluate the objects, make changes and then > serialize those changes once rules have stopped firing. I do something like > this using EJB and JPA. I've been interested in pushing this into the rules > themselves; which I believe is now possible using the JPA support within > Drools flow. This might work much better if you were using statefull and > long running working memory process. Even in the event of catastrophic > failure, your transactionally serialized changes would still remain in the > database. So you could restart and pick up work from where you were last. > > You may wish to take a look at the following blog entries: > > http://blog.athico.com/2009/03/drools-50-cr1-new-and-noteworthy.html > > And the Drools flow documentation. > > I'm hoping to move our work in this direction so please do pass on your > results; unless I'm completely misunderstanding how one can use flow, expert > and JPA together with transactions. > > best wishes, > > Andrew > > On Sat, Nov 7, 2009 at 9:23 AM, ken.p <ken.annihilat...@gmail.com> wrote: > >> >> I am also looking similar feature. We can currently use AOP to send event >> to >> stream. However, we have events with relevant duration for days and some >> time weeks. If server were to restart for maintenance, how do we restore >> to >> the same state? >> >> >> >> Daniel Miller-9 wrote: >> > >> > So I hope that someone out here, or many of you, can give me some idea >> > of how you do this. >> > >> > I have about 20+ entities in my database that I want Drools to know >> > about. Obviously my hope is to apply CEP, rules and processes to >> > these items. However, I feel like I'm missing some type of connection >> > between how Drools recommends keeping my working memory in sync with >> > my database changes. >> > >> > Ideally, I'd love to be able to just update my entities as I have been >> > doing in the database, but have those changes automatically move their >> > way over into the working memory. How do any of you recommend I >> > accomplish this? >> > >> > Thanks in advance for any suggestions. >> > >> > Dan Miller >> > >> > _______________________________________________ >> > rules-users mailing list >> > rules-users@lists.jboss.org >> > https://lists.jboss.org/mailman/listinfo/rules-users >> > >> > >> >> -- >> View this message in context: >> http://old.nabble.com/Maintaining-DB-Working-Memory-Synchronization-tp26238313p26241138.html >> Sent from the drools - user mailing list archive at Nabble.com. >> >> _______________________________________________ >> rules-users mailing list >> rules-users@lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> > > > > -- > +1 510 342 5693 > > PO Box 7775 #8750 > San Francisco, California 94120-7775 > > "Warning: following standard input indefinitely is ineffective" > - /bin/tail error message > > "Against logic there is no armor like ignorance." > - Laurence J. Pete > > _______________________________________________ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > >
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