[rules-users] help! rulerule_key failed to predicate
hello,everyone! I wrote a rule with Drools, I compile the program and get the
errors as follows:
[3,0]: [ERR 103] Line 3:0 rule 'rule_key' failed predicate:
{(validateIdentifierKey(DroolsSoftKeywords.RULE))}? in rule
[3,9]: [ERR 101] Line 3:9 no viable alternative at input 'com' in rule package
[7,0]: [ERR 101] Line 7:0 no viable alternative at input 'import' in rule
package in rule sample
I don't know how it happened, looking forward to your reply! thank you !!!
PS: My rules are here:
dialect mvel
package com.sample
import com.sample.Server;
rule system will execute 'tc' command
when
eval(Server.Message8388608)
then
System.out.println(The network is so crowd that it needs repairing.);
Runtime.getRuntime().exec(tc);#give the authority and execute the tc
command
end
rule caution
when
eval(Server.Message==8388608)
then
System.out.println(caution!The network maybe will get blocked very
soon.);
end
rule fluent network
when
eval(Server.Message8388608)#conditions
then
System.out.println(the current network is very good);#actions
end
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Re: [rules-users] help! rulerule_key failed to predicate
Hi,
I thnik you might need to reposition dialect = mvel. The compiling error
will go away if you put it inside each of your rules. See example:
rule system will execute 'tc' command
when
dialect mvel
eval(Server.Message8388608)
then
System.out.println(The network is so crowd that it needs repairing.);
Runtime.getRuntime().exec(tc);#give the authority and execute the tc
command
end
rule caution
dialect mvel
when
eval(Server.Message==8388608)
then
System.out.println(caution!The network maybe will get blocked very
soon.);
end
rule fluent network
dialect mvel
when
eval(Server.Message8388608)#conditions
then
System.out.println(the current network is very good);#actions
end
Also, mvel is needed to make the eval statement work. In your case, it
might not be needed to work with eval at all.
WHEN Server.message should work as well. Providing you have an
attribute message in Server with a getter defined.
Regards,
Frank
赵慧 wrote:
hello,everyone! I wrote a rule with Drools, I compile the program and get
the errors as follows:
[3,0]: [ERR 103] Line 3:0 rule 'rule_key' failed predicate:
{(validateIdentifierKey(DroolsSoftKeywords.RULE))}? in rule
[3,9]: [ERR 101] Line 3:9 no viable alternative at input 'com' in rule
package
[7,0]: [ERR 101] Line 7:0 no viable alternative at input 'import' in rule
package in rule sample
I don't know how it happened, looking forward to your reply! thank you !!!
PS: My rules are here:
dialect mvel
package com.sample
import com.sample.Server;
rule system will execute 'tc' command
when
eval(Server.Message8388608)
then
System.out.println(The network is so crowd that it needs
repairing.);
Runtime.getRuntime().exec(tc);#give the authority and execute the
tc command
end
rule caution
when
eval(Server.Message==8388608)
then
System.out.println(caution!The network maybe will get blocked
very soon.);
end
rule fluent network
when
eval(Server.Message8388608)#conditions
then
System.out.println(the current network is very good);#actions
end
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Re: [rules-users] help! rulerule_key failed to predicate
The package declaration must be first.
You don't have to insert the dialect attribute into each rule.
Please consult the manual when programming.
-W
2011/4/15 赵慧 zh...@hpnl.ac.cn
hello,everyone! I wrote a rule with Drools,
I compile the program and get the errors as follows:
[3,0]: [ERR 103] Line 3:0 rule 'rule_key' failed predicate:
{(validateIdentifierKey(DroolsSoftKeywords.RULE))}? in rule
[3,9]: [ERR 101] Line 3:9 no viable alternative at input 'com' in rule
package
[7,0]: [ERR 101] Line 7:0 no viable alternative at input 'import' in rule
package in rule sample
I don't know how it happened, looking forward to your reply! thank you !!!
PS: My rules are here:
dialect mvel
package com.sample
import com.sample.Server;
rule system will execute 'tc' command
when
eval(Server.Message8388608)
then
System.out.println(The network is so crowd that it needs
repairing.);
Runtime.getRuntime().exec(tc);#give the authority and execute the
tc command
end
rule caution
when
eval(Server.Message==8388608)
then
System.out.println(caution!The network maybe will get blocked very
soon.);
end
rule fluent network
when
eval(Server.Message8388608)#conditions
then
System.out.println(the current network is very good);#actions
end
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Re: [rules-users] Expert versus Expert
Hi, thanks for the tips. I wasn't aware of drools-server. There's not much documentation about it, especially how it can work with Guvnor in order to get the assets. Or maybe I wasn't able to find it. Such a centralized approach makes sense to me, I hope it to be a reality soon. David - Mail Original - De: Mark Proctor mproc...@codehaus.org À: rules-users@lists.jboss.org Envoyé: Jeudi 14 Avril 2011 16h07:10 GMT +01:00 Amsterdam / Berlin / Berne / Rome / Stockholm / Vienne Objet: Re: [rules-users] Expert versus Expert On 14/04/2011 09:11, delirii wrote: A few months ago a question was asked about the difference and the use case involving Drools Expert and Drools Guvnor. To be honest, it isn't clear for me too and as there wasn't any answer to this first question, so I'm trying to have an answer with your help :) What's clear : - Guvnor is a repository for the assets - The easiest (?) and certainly the mainly available as a tutorial solution is to create in each application an agent that grabs the assets and execute the whole thing in its own context. What's not clear : - how to centralize the execution in order to know exactly what's executed, by whom, and how (be able to log which facts are sent, to which rules, and be able to read the execution plan - if it exists a real stand alone centralized engine that match this need (Drools Expert ?) If some can explain this a little bit more, I'll be really happy to read ! And if it can be added to the current documentation, it could be a great idea too. I think that's fair. We don't have centralised management of expert runtime's yet. It's currently de-coupled via a pull mechanism. Mark Thanks for your help. -- View this message in context: http://drools.46999.n3.nabble.com/Expert-versus-Expert-tp1739141p2819515.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Expert versus Expert
This helped me for linking drools-server to Guvnor: http://www.plugtree.com/drools-server-configuration-using-spring-3/ Best regards, Seb On Fri, Apr 15, 2011 at 11:39 AM, martinda...@free.fr wrote: Hi, thanks for the tips. I wasn't aware of drools-server. There's not much documentation about it, especially how it can work with Guvnor in order to get the assets. Or maybe I wasn't able to find it. Such a centralized approach makes sense to me, I hope it to be a reality soon. David - Mail Original - De: Mark Proctor mproc...@codehaus.org À: rules-users@lists.jboss.org Envoyé: Jeudi 14 Avril 2011 16h07:10 GMT +01:00 Amsterdam / Berlin / Berne / Rome / Stockholm / Vienne Objet: Re: [rules-users] Expert versus Expert On 14/04/2011 09:11, delirii wrote: A few months ago a question was asked about the difference and the use case involving Drools Expert and Drools Guvnor. To be honest, it isn't clear for me too and as there wasn't any answer to this first question, so I'm trying to have an answer with your help :) What's clear : - Guvnor is a repository for the assets - The easiest (?) and certainly the mainly available as a tutorial solution is to create in each application an agent that grabs the assets and execute the whole thing in its own context. What's not clear : - how to centralize the execution in order to know exactly what's executed, by whom, and how (be able to log which facts are sent, to which rules, and be able to read the execution plan - if it exists a real stand alone centralized engine that match this need (Drools Expert ?) If some can explain this a little bit more, I'll be really happy to read ! And if it can be added to the current documentation, it could be a great idea too. I think that's fair. We don't have centralised management of expert runtime's yet. It's currently de-coupled via a pull mechanism. Mark Thanks for your help. -- View this message in context: http://drools.46999.n3.nabble.com/Expert-versus-Expert-tp1739141p2819515.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Planner and optional rules
Hello. I'm working on a planning system and my customer is requesting to use a rule engine. Of course, we are gonna use Drools and we are considering planner. The customer already talked about having hard and soft constraints, however, one request of the users is to enable them to inactivate specific constraints for some specific one-shot calculation when required. I've been thinking of using specific RuleFlows in order to not use the different constraints selected by the user, but is seems a bit long and risky as the number of selectable constraints could be high therefore increasing the number of combination (RuleFlows) to write. Is there any native solution to this issue knowing that performances are in the spotlight as well? Thanx in advance. Nico -- View this message in context: http://drools.46999.n3.nabble.com/Planner-and-optional-rules-tp2823955p2823955.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Planner and optional rules
In the examination example some data sets don't use some of the soft constraints. Those soft constraint score rules are disabled because they start with a check on the InstitutionalWeighting singleton: // Two exams in a row which share students rule twoExamsInARow when $institutionalWeighting : InstitutionalWeighting(twoInARowPenality != 0) ... // real soft constraints then ... end IIRC, there's no measurable performance cost to this technique. Op 15-04-11 11:53, ToTToRRo schreef: Hello. I'm working on a planning system and my customer is requesting to use a rule engine. Of course, we are gonna use Drools and we are considering planner. The customer already talked about having hard and soft constraints, however, one request of the users is to enable them to inactivate specific constraints for some specific one-shot calculation when required. I've been thinking of using specific RuleFlows in order to not use the different constraints selected by the user, but is seems a bit long and risky as the number of selectable constraints could be high therefore increasing the number of combination (RuleFlows) to write. Is there any native solution to this issue knowing that performances are in the spotlight as well? Thanx in advance. Nico -- View this message in context: http://drools.46999.n3.nabble.com/Planner-and-optional-rules-tp2823955p2823955.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- With kind regards, Geoffrey De Smet ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools server and knowledge agent functionality
Hi. You can configure a Knowledge Agent in Drools-Server using spring. You have to declare it in knowledge-services.xml config file. You need to do something like: drools:kagent id=kagent1 kbase=kbase1 new-instance=false drools:resources drools:resource type=DRL source=file:/some/path/to/apache-tomcat-7.0.6/webapps/drools-server/WEB-INF/classes/test.drl/ drools:resource type=PKG source= http://somehost:8080/droolg-guvnor/.../LATEST/ /drools:resources /drools:kagent For configure the scan interval, you can use: drools:resource-change-scanner id=s1 interval=5 / There are, though, some caveats: - If you are deploying drools-server in tomcat, then you can't use classpath resources in the kagent. I have reported this problem today. - drools-server doesn't start ResourceChangeNotifierService nor ResourceChangeScannerService automatically. You need to hack some way to invoke ResourceFactory.getResourceChangeNotifierService().start(); and ResourceFactory.getResourceChangeScannerService().start();. I was thinking in a Servlet that calls these methods in its init() method. Best Regards, Esteban Aliverti - Developer @ http://www.plugtree.com - Blog @ http://ilesteban.wordpress.com 2011/4/15 Manuel Ortiz manuel.ortizra...@gmail.com Hello everybody: I am taking a look at Drools Integration documentation to understand how Drools server works and how can be used, and have a doubt concerning, let's say... 'KnowledgeAgent capabilities'. Does Drools server support on the fly rule updating as when using KnowledgeAgent to create KnowledgeBase objects? If it does, where can be configured 'KnowledgeAgent related' properties such as newInstance or resource scanner interval? Thank you in advance for your time. Kind regards, Manuel Ortiz. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Simple rule and Query
I'am using 5.2.0-SNAPSHOT using maven from
https://repository.jboss.org/nexus/content/groups/public/ and i can't make it
work...
The query still return a size of 0...
Can you share your entire project with me ?
Thanks
De : Wolfgang Laun [mailto:wolfgang.l...@gmail.com]
Envoyé : jeudi 14 avril 2011 09:34
À : Rules Users List
Objet : Re: [rules-users] Simple rule and Query
This seems to be fixed for 5.2.x.:
declare Num
num : Integer
end
rule sort
when
Integer( $i: intValue )
then
insert( new Num( $i ) );
end
query numbers
$a: Num( $b: num )
end
QueryResults qRes = session.getQueryResults( numbers );
System.out.println( result count: + qRes.size() );
for( QueryResultsRow row: qRes ){
Object obj = row.get( $b );
System.out.println( $b= + obj.toString() );
}
This produces the expected results.
Calling getQueryResults with a string not denoting an existing query returns an
empty result set. I've updated the javadoc - thanks.
-W
2011/4/14 DECOUX Yannick yannick.dec...@ucm.bemailto:yannick.dec...@ucm.be
query numbers
$a: Num( $b: num )
end
Hi everyone,
I'am still stuck with this simple example, anyone can tell me where to look or
what I'm missing ?
Thanks
Yannick
De : DECOUX Yannick [mailto:yannick.dec...@ucm.bemailto:yannick.dec...@ucm.be]
Envoyé : mardi 5 avril 2011 07:52
À : rules-users@lists.jboss.orgmailto:rules-users@lists.jboss.org
Objet : [rules-users] Simple rule and Query
Hi,
I'am trying to use Query and i'am facing a little problem :
Given this simple rule :
package be.test.person
import be.test.person.*
query get adult
adult : Adult( )
end
query get person
person : Person( )
end
declare Adult
name : String
end
rule A person over 18 is an adult
when
Person( age = 18)
then
System.out.println(Adult detected);
insert(new Adult());
end
Lets suppose one Person over 18 is inserted inside the working memory, the
result of the query « get adult » is 0 (Please note the declaration of Adult
type inside the rule)
If I create a Java class Adult (commenting the one in the .drl file) and then
run the query again, this time the result is 1
Also, the signature of
org.drools.runtime.rule.WorkingMemory.getQueryResults(String) says
IllegalArgumentException when query is not found in the KnowledgeBase. This
doesn't seems to be the case when I use a fake query name.
I'am using drools 5.1.1
Any idea on this ?
Thanks
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