Re: [rules-users] java.lang.ClassCastException: [Lorg.drools.rule.Package; cannot be cast to org.drools.rule.Package
by Manasi
Hi,
I am also getting same error when trying to a call rule stored in guvnor.
Following error I am getting:
Exception in thread "main" java.lang.ClassCastException:
[Lorg.drools.rule.Package; cannot be cast to org.drools.rule.Package
at org.drools.agent.HttpClientImpl.fetchPackage(HttpClientImpl.java:82)
at org.drools.agent.URLScanner.readPackage(URLScanner.java:171)
at org.drools.agent.URLScanner.getChangeSet(URLScanner.java:143)
at org.drools.agent.URLScanner.loadPackageChanges(URLScanner.java:119)
at org.drools.agent.RuleAgent.checkForChanges(RuleAgent.java:427)
at org.drools.agent.RuleAgent.refreshRuleBase(RuleAgent.java:379)
at org.drools.agent.RuleAgent.configure(RuleAgent.java:364)
at org.drools.agent.RuleAgent.init(RuleAgent.java:264)
at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:204)
at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:164)
at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:273)
I am using Drools 5.4 version.
The error is coming when trying to get the RuleAgent:
RuleAgent agent = RuleAgent.newRuleAgent("/com/model/drools.properties");
drools.properties contains:
url =
http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/FeltKnapRes...
name=guvnorAgent
enableBasicAuthentication=True
username=admin
password=admin
FeltKnapRestriktionerKundeMedAnl is the package name I have created in
guvnor ,and I want to call one of the rule in this package.
Thanks,
Manasi
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12 years, 11 months
Fire Rule in Stateless Knowledge Session
by snehils
Hi,
I am new in Drools. I am using Drools version 5.1.0
My requirement is kind of request response, where I have to perform some
checks for the request and respond the result. Hence, I decided to go with
stateless knowledge session.
I have prepared .DRL file and it contains set of rules. When some request
receives I have to identify the rule(s) belongs to that request and then
fire the rule(s).
I am not able to figure out how to categories the rules request wise in DRL
file? Also, how to fire only those rules which belongs to the category.
For example, there are three kinds of requests Rq1, Rq2 and Rq3. There are
rules in DRL file: R1, R2, R3, R4 and R5. R1, R2 belongs to Rq1, R3 belongs
to Rq2 and R4, R5 belongs to Rq3.
When some request receives only its belonging rules should be fired. For
example, on receiving of Rq2 only R3 should be fired.
Please provide me some code snipped or link.
Thanks
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13 years
Guvnor: Accessing Bound Variable in "Then" Statement
by Vann_the_Red
Hello. I started with a search and didn't find an answer. I apologize if my
search-fu was lacking today.
I'm a non-developer tasked with rules creation and testing using guvnor. I
have found some scenarios where I can bind a variable to either the whole
input model or a fact in the input model and then later access those in the
output model by selecting "Bound Variable" from the popup box in the Then
statement. In other scenarios, "Bound Variable" is not an option (only
Literal or Formula). What must I do to be able to access the bound
variables from the When statement(s) in the Then statement(s)?
TIA,
Vann
This is a repost because I wasn't on the mailing list yet and I gather most
didn't see it. Apologies again.
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13 years
Guvnor-5.5
by Ricardo
Is any one tried guvnor-5.5 in websphere application server?
What happen to the conponents.xml?
Why guvnor is tightly coupled with jbossAS even each version (jbossAS) got
separate war file?
this seems a big impediment for using guvnor as rule authoring tools.
Is one knows well aware these and already know how to deal this, please
advise me?
-----
with kind regards,
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13 years
How to write Hibernate query lang(HQL) in .DRL file
by zeeshan
Hi !
According to my requirement I need to fetch and Insert data from database
using Hibernate Query from .DRL file.
I have idea how to execute HQL in Plain Java class but according to my
requirement,I need to fire query to database from .DRL file which I tried
but unable to get output instead I was getting errors.
Can anyone suggest me process to execute Hibernate Query from DRL file
or please provide me some sample code or any link.
Thanks !!
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13 years, 1 month
[Drools Planner] Multi depot CVRP / CVRPTW
by Mats Norén
Hi,
I've been looking at the VRP example in Drools and I'm thinking about using
it for multi depot cvrp and / or capacitated vrp with time windows.
Has anyone else tried planner for these use cases and can maybe shed some
light on their implementation?
Regards,
Mats
13 years, 2 months
"Rule-Id" for a Drools Rule
by harishtejwani
All:
We are using Drools to detect specific events/conditions in our system.
In the 'then' condition of Drools rule, we would like to persist the "Rule
Id" of the rule that created the specific event/condition
This is because all our reporting is based on "rules" as filters, where
users can look at exceptions by specific rules.
Is there a suggestion or sample as how can the "Rule Id" be persisted or
indicated in the then condition that is immutable or can be long-lived. The
current approach of using Rule Name itself as the ID is brittle as this can
be changed and suddenly all reports would break.
If we assign ID's to rules, where do we keep the mapping of RULE ID to
Rules. If we store rules in GUVRNOR is there a way we can get Rule Id's for
Rules?
Best regards
Harish Tejwani
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13 years, 2 months
