Weblogic rules to Drools rules.
by kashif10
Hi,
We have a product using weblogic server & weblogic rules.
We are planning to move our application to jboss As using drool rules.
Brief intro of our rules:
Currently we have around 20K rules in our databse. We load all those rules
form our database in to weblogic Rule Manger. All those rules loaded in to
Rule manger with rule ID as key & Rule Data as values. we can simply add
new ruels on run time we can remove any rule form RuleMnager at runtime.
Then we have catalogs in out databse pointing those rules.
So whenever user inputs some data & ask to evaluate that data with some
catalog.
Then we simply add user data in WM & get rules from Rule manager one by one
& evaliate the rule on the basisi of WM. In the end we send the
alerts/result to user.
My questions:
i) Is there a rule manger Api in drools to whoch we provide rule Id along
with rule data to load rules in memory.
& we can remove & add furtgur rules in to it.
Also how effecient is it to load & evaluate more than 20K rules.
ii) I don't find RuleSet in ApI, whats the replacement of it?
iii) Any link having good example to load rules & then evaluate a set from
this a caalog type of case.
I hope your precious answers will help us a lot to make the decision.
Thanks.
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16 years, 1 month
Stateless Vs Stateful Sessions in Webtier
by Pritam
It isn't clear from the documentation and examples on the recommended usage
of knowledge sessions. From Michael Bali's book, it is highly recommended to
use StatelessKnowledgeSession, since it's threadsafe, but a quick look at
the API shows that it doesn't support many of the features of stateful
ksession.
-- cannot pass agendaFilter
-- cannot use agenda-group, activation-group or ruleflow-group in statelss
ksession
-- It looks like one cannot get Agenda from a statelss ksession and hence
cannot use clear() or setFocus()
...
Drools says, for rules itself, "it doesn't matter whether you use stateless
or stateful ksession ..." then why is that an entire set of metadata like
grouping and ordering is ignored?
If statefulknowledge session isn't threadsafe, then what are the best
practices and considerations for making it threadsafe?
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16 years, 1 month
prevent infinite loops
by Garner, Shawn
Is there a good way to globally prevent infinite loops.
I had rule A and rule B and they both have FactA on the condition.
They also both modify FactA.
I tried no-loop and it prevents a loop of repeating RuleA over and over.
However it then goes from Rule A back to Rule B back to Rule A.
I fixed it by lock-on-active instead of no-loop.
However I was wondering if there was either a timeout feature or a maximum number of times you could set a rule to be executed to error out on infinite loops.
Any guidance would be appreciated.
Thanks,
SDG
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16 years, 1 month
Checking in one rule the "result" of another rule
by orchid
Hi All,
I have "rule1" and "rule2", very simple rules. I would like in "rule3" to
check one of the following:
"rule1" AND "rule2" (i.e. if both rule1 and rule2 were fired)
"rule1" OR "rule2" (rule1 or rule2 was fired)
How can I achieve this? Does the "extends" keyword might help here?
I achieved that buy defining a list, to which rule1 and rule2 in the RHS
inserted some value. In rule3 I checked the values of that list. I would
like to ask if there are some prettier solutions.
Thanks in advance.
Any help would be appreciated.
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16 years, 1 month
