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Editorial Team
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Asked: 2026-05-21T02:57:09+00:00

I’ve been playing with examples I downloaded with the book Drools JBoss Rules 5.0.

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I’ve been playing with examples I downloaded with the book Drools JBoss Rules 5.0. To my relief they work 🙂 Drools Flow has been my point of interest as a possible workflow engine replacement.

As I’m trying to wrap my head around things, I’ve been wondering how a premature death of a rulesflow process gets restarted? What I’m mean is say a process is bouncing from one node to another like expected, then the containing process dies due to a crash, restart or whatever. Is the current node/place of the ruleflow process retained, and can it just continue from that point on system restart? If so how?

The group I work for is very Java EE centric with JBoss being our favorite application server. I see examples of Drools leveraging Spring’s persistence and bean lookup support.

Are there examples of doing the same with JBoss?

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  1. Editorial Team

    If you persist the state of the process instances and tasks in the database. Even if the VM was down and restart again, you can retrieve the process instances.

    Use the

    To create the session

    ksession = JPAKnowledgeService.newStatefulKnowledgeSession(kbase,null,env)

    To load the session with the session id.

    ksession = JPAKnowledgeService.loadStatefulKnowledgeSession( sessionId, kbase,

    You only need to know the session id. Session information will be store in SessionInfo table. Download the example project below.

    http://dl.dropbox.com/u/2634115/drools-test.zip

    The example is using Btm with H2 database, it also work well with mysql-connector-java-5.1.13 with Btm. Note that the process that are complete will be automatically deleted from the database.

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