Re: [rules-users] Multi threaded rule engine question.
I wouldn't reuse a stateless session. You could reuse a stateful session and clean up
between runs, but session creation is not that expensive. (and easily less expensive than
cleanup of a stateful session, mattering on the complexity of your rules)
GreG
On Sep 27, 2010, at 8:39, Nadav Hashimshony <nadavh(a)gmail.com> wrote:
My rule engine server is multi threaded.
in the server main i build a knowledgebase:
KnowledgeBuilderConfiguration config =
KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(droolsConf, null);
KnowledgeBuilder builder = KnowledgeBuilderFactory.newKnowledgeBuilder(config);
builder.add(ResourceFactory.newFileResource("path to drools pkg",
ResourceType.PKG);
KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase();
knowledgeBase.addKnowledgePackages(builder.getKnowledgePackages());
i have 10 threads that have the following code:
thread run method:
as long as a Vector has data do:
1. StatelessKnowledgeSession droolsSession=
m_droolsKagent.getKnowledgeBase().newStatelessKnowledgeSession();
2. get data object from a vector
3. create fact model from data
4. droolsSession.insert(facts);
5. droolsSession.fireAllRules();
6. do stuff with the response
7.droosSession.dispose
8.get next object from vector.
Questions:
1. should i create each time the droolsSession? or can i resuse the same one, meaning can
i create it in the Thread's constractor?
Thanks
Nadav.
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