as it says in the docs. we’ve designed things to put in foundations for future
multi-threaded exploitation, but there is nothing there now.
The example code doesn’t make too much sense to me. As you are saying you are
using them as a pool, but you are disposing after use.
Mark
On 11 Apr 2014, at 08:48, Mercier Jonathan jmerc...@genoscope.cns.fr wrote:
Le 09/04/2014 11:20, Maxime Falaize a écrit :
I confirm that the multithreaded rules evaluation is not currently
supported. See
https://github.com/droolsjbpm/drools/blob/master/drools-core/src/main/java/org/drools/core/RuleBaseConfiguration.java#L683
2014-04-07 12:27 GMT+02:00 Maxime Falaize maxime.fala...@gmail.com:
I'm sorry but I don't understand what you are talking about. In this
article, there is nothing about multithreaded rules evaluation. It just says
that the Phreak algorithm is designed for thread safety and future multicore
processors exploitation. It doesn't mean that it is already multithreaded.
Moreover I tested my appliciation with and without multithreaded sessions (I
am using Drools 6.0.1.Final) and I noted a faster execution in the
multithreaded one.
2014-04-04 13:53 GMT+02:00 jmercier jmerc...@genoscope.cns.fr:
Le 04/03/2014 09:55, Maxime Falaize a écrit :
Hello,
I want to ask you if it is a good practive to pool stateful sessions
for a specific ruleset to improve the execution performance.
Actually in my application I execute my rules by calling SOAP
webservice. For performance purpose, I test multithreaded calls to my
webservice and I noted that when I pool sessions in the server side,
it improves the performance a lot.
To pool sessions, I just declare multiple ksession tag in my
kmodule.xml :
kbase name=KBase packages=com.example.*
ksession name=KSession1/
ksession name=KSession2/
ksession name=KSession3/
ksession name=KSession4/
ksession name=KSession5/
/kbase
In my spring webservice endpoint I just put that code to handle the
pool :
@Endpoint
public class ExampleEndpoint implements InitializingBean {
@Autowired
private ExampleRuleService ruleService;
private MapInteger, Boolean isRunningMap = new
HashMapInteger, Boolean();
private static final int NB_POOL_SESSIONS = 5;
@PayloadRoot(localPart = com.example.ExampleRequest)
@ResponsePayload
public ExampleResponse handleRequest(
@RequestPayload ExampleRequest request) throws
InterruptedException {
KieServices ks = KieServices.Factory.get();
KieContainer kc = ks.getKieClasspathContainer();
while (true) {
for (int i = 0; i NB_POOL_SESSIONS; i++) {
boolean run = false;
synchronized (isRunningMap) {
if (!isRunningMap.get(i)) {
isRunningMap.put(i, true);
run = true;
}
}
if (run) {
KieSession ksession = kc.newKieSession(KSession
+ (i + 1));
ExampleResponse response =
ruleService.run(ksession, request);
ksession.dispose();
isRunningMap.put(i, false);
return response;
}
}
Thread.sleep(100);
}
}
public void afterPropertiesSet() throws Exception {
for (int i = 1; i = NB_POOL_SESSIONS; i++) {
isRunningMap.put((i - 1), false);
}
}
}
It works well because in my benchmark I improve 5 times the
performance (as I have 5 different threads) but I wondered if it is a
good practice and if it does not hide any issues that I could have in
the future.
Thanks for your help.
--
Maxime FALAIZE
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Hi maxime,
I do not remember if use drools 6 or drools 5. If you using drools 6.
Phreaks algorithm use multi threading according to use 'from
accummulate' far i understand here:
http://planet.jboss.org/post/drools_6_performance_with_the_phreak_algorithm
Instead to put a thread by ksession here rules evaluation are
multi-threaded.
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Maxime FALAIZE
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Maxime FALAIZE
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Ah yes. Maybe Mark Proktor could tell some information about this
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