You don't need to demarcate the user transactions there.. Drools Flow will be in charge of that.<br><br>you only need to keep the session id in order to be able to restore it when you need it..<br><br><br><div class="gmail_quote">
2009/10/19 Nair, Mahesh <span dir="ltr"><<a href="mailto:Mahesh.Nair@qwest.com">Mahesh.Nair@qwest.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<div>
<div><span><font face="Arial" size="2">Hello
everyone,</font></span></div>
<div><span><font face="Arial" size="2"></font></span> </div>
<div><span><font face="Arial" size="2">I'm new to drools
& I'm trying my hand at creating a rule-flow in which I can back a
couple of steps & </font></span></div>
<div><span><font face="Arial" size="2">the
KnowledgeSession is restored to the same state it was in earlier. I'm
using Drools 5.1.0 M1 & Eclipse 3.5.</font></span></div>
<div><span><font face="Arial" size="2"></font></span> </div>
<div><span><font face="Arial" size="2">I have a rule-flow
with the following nodes:</font></span></div>
<div><span><font face="Arial" size="2">A->B->C</font></span></div>
<div><span><font face="Arial" size="2">where A would be a
node asking for an input (our fact), B would be a Rule Task that would apply
certain rules on our fact & </font></span></div>
<div><span><font face="Arial" size="2">at C, I may decide
that I need to back up to node A. Both A & C are custom work
items.</font></span></div>
<div><span><font face="Arial" size="2"></font></span> </div>
<div><span><font face="Arial" size="2">I've managed to
rollback the transaction (I borrowed a lot of code from the test classes in the
source, thanks a ton for them).</font></span></div>
<div><span><font face="Arial" size="2">But I just
can't get my process to start again.</font></span></div>
<div><span><font face="Arial" size="2"></font></span> </div>
<div><span><font face="Arial" size="2">I'll paste a couple
of lines of code from my test class below:</font></span></div>
<div><span><font face="Arial" size="2">.....</font></span></div><span>
<div align="left"><font size="2"><font face="Arial">ProcessInstance pi =
ksession.startProcess(</font><font color="#2a00ff"><font color="#2a00ff" face="Arial">"sampleflow"</font></font><font face="Arial">);</font></font></div>
<div align="left"><font face="Arial" size="2">ksession.fireAllRules();</font></div></span>
<div><span><font face="Arial" size="2"> </font>
<div align="left"><font face="Arial"><font size="2">ut = (UserTransaction) <b><font color="#7f0055"><font color="#7f0055">new</font></font></b></font></font><font face="Arial" size="2"> InitialContext().lookup( <font color="#2a00ff"><font color="#2a00ff">"java:comp/UserTransaction"</font></font> );</font></div>
<div align="left"><font face="Arial"><font size="2">ut.begin();<span><i>//Is beginning the transaction boundary here
correct?</i></span></font></font></div><font face="Arial" size="2">.....</font></span></div>
<div><span><i><font face="Arial" size="2">//Now I roll
back the transaction depending on the input at node C</font></i></span></div>
<div><span><font face="Arial" size="2">ut.rollback();</font></span></div>
<div><span><i><font face="Arial" size="2">.....</font></i></span></div>
<div><span><i><font face="Arial" size="2">//And recreate
the knowledge session</font></i></span></div>
<div><font size="2"><font face="Arial">ksession =
JPAKnowledgeService.loadStatefulKnowledgeSession(id, kbase, </font><b><font color="#7f0055"><font color="#7f0055"><font face="Arial">null</font></font></font></b></font><font face="Arial" size="2">,
env);</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><span><font face="Arial" size="2">I expected the
session to restart the process from node A once it was recreated. Am I going in
the right direction?</font></span></div>
<div><span><font face="Arial" size="2">Or is
my basic understanding of how session persistence works in Drools Flow
flawed?</font></span></div>
<div><span><font face="Arial" size="2"></font></span> </div>
<div><span></span><span><font face="Arial" size="2">I'd really appreciate a push in the right
direction.</font></span></div>
<div><span><font face="Arial" size="2"></font></span> </div>
<div><span><font face="Arial" size="2">Thanks in
advance,</font></span></div>
<div><span><font face="Arial"><font size="2"><span>Mahesh</span>.</font></font></span></div></div></div>
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