Re: [rules-users] Drools 5.1 Flow in a "Clustered" environment

Thank you for the reply. I a not sure where the community effort lives, but would it be possible send a link in order to take a look? Ken On Oct 28, 2010, at 8:28 PM, Kris Verlaenen wrote: > Ken, > > In Drools, timers etc. are linked to a session (where the session can > contain process instances, timers, data, rule evaluations, etc.). So, > even if you are using Drools Flow in a clustered environment, where you > could have a number of independent sessions running simultaneously, the > timer will always be associated to that session. There are two possible > strategies then: either (1) you keep the session online for ever (your > cluster has a number of running sessions and you're possibly using > persistence to restore in case of system failure), and the timers will > fire in that session only when the time is right or (2) you only keep > your session alive when it is necessary so sessions can go offline, > where you could then use a scheduler to make sure the session is brought > back online (from persistent storage) whenever a timer should fire in an > offline session. The latter is currently being implemented as a > community contribution. > > Kris > > Ken Young wrote: > >> We are looking at embedding Drools 5.1 (specifically Drools Flow) in our application, but I am coming up short on determining how to configure clustering, or the support. >> >> Specifically, I want to ensure that background processes that are taking place (reminders, timers, etc.) only happen once on a cluster. Does drools support this and how? >> >> In other software that we have clustered (Quartz for example), where a shared database lock is used to ensure the the processing happens in one place. I was wondering if Drools 5.1 worked in a similar fashion. >> >> Thanks >> Ken >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users