10:27 a.m.
Hello all,
I am new to drools. My company is looking into switching from a commercial
rule engine to drools. Our existing codebase is .net not Java. We are
trying to integrate drools into our existing .net application by calling
into a drools-server using it’s restful interface.
Our current rule engine only works in a stateless mode so I am trying to
figure out how to get drools-server to work in a stateless mode. I have
posted before that I have been having difficulty using a stateless session
with ruleflows (
http://drools.46999.n3.nabble.com/Ruleflow-not-working-with-stateless-ses...).
I have noticed that the stateful sessions seem to work fine as far as
ruleflows are concerned. I am wondering if I can use a stateful session
instead of stateless.
Our application could have 100s of unique users per minute. The rule
engine provides a unique decision for each user based on their specific
data. So, each user’s data / facts should be isolated. There can’t be any
data sharing between users, that would make the rule engine decisions
invalid. How would I configure a stateful session to work in this
scenario? Is it possible?
Thanks,
Tim S.
10:49 a.m.
New subject: Stateless or stateful knowledge session in drools server
I can't say much about drools server. I went for a Spring web app wrapping a stateful
session, and exposing itself to .NET applications via a SOAP API and a bit of REST. But
that's cos I like Spring. :)
If you do need to work with a stateful session, you shouldn't need to
'isolate' any data as such. You can insert facts relating to all users into
working memory and then include the user ID on a request when you insert it into working
memory. That way, you just need your rules to have constraints that match a user fact to
some other fact on which you're making decisions. Treat it a bit like a join in a
database. You keep data relating to all your users in the database, but when you query the
database, you join/filter on the user ID, or some other relevant key.
Steve
On 14 Feb 2013, at 16:27, Tim Slonaker <tslonaker+drools(a)gmail.com> wrote:
Hello all,
I am new to drools. My company is looking into switching from a commercial rule engine
to drools. Our existing codebase is .net not Java. We are trying to integrate drools
into our existing .net application by calling into a drools-server using it’s restful
interface.
Our current rule engine only works in a stateless mode so I am trying to figure out how
to get drools-server to work in a stateless mode. I have posted before that I have been
having difficulty using a stateless session with ruleflows
(http://drools.46999.n3.nabble.com/Ruleflow-not-working-with-stateless-ses...).
I have noticed that the stateful sessions seem to work fine as far as ruleflows are
concerned. I am wondering if I can use a stateful session instead of stateless.
Our application could have 100s of unique users per minute. The rule engine provides a
unique decision for each user based on their specific data. So, each user’s data / facts
should be isolated. There can’t be any data sharing between users, that would make the
rule engine decisions invalid. How would I configure a stateful session to work in this
scenario? Is it possible?
Thanks,
Tim S.
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