Re: [rules-users] Rule is not firing
try simply:
rule Your First Rule
dialect mvel
when
Message(message == Hello )
then
System.out.println(First Rule fired);
end
On Mon, Oct 26, 2009 at 6:34 AM, satyasri.ch satyasri...@gmail.com wrote:
Hi ,
I am doing the sample drools project.
Below are the sample rule and Fact class.
when Running from eclipse ide both rules are working fine.
Where as running the rule outside eclipse ide only second rule fired .
Suggest me any ideas
--
package test
import test.Message;
rule Your First Rule
dialect mvel
when
m:Message( )
eval(m.getMessage() == Hello)
then
System.out.println(First Rule fired);
end
rule Your Second Rule
dialect mvel
when
eval(true)`
then
System.out.println(Second Rule fired);
end
package test;
public class Message{
private String message;
public String getMessage(){
return this.message;
}
public void setMessage(String message) {
this.message = message;
}
}
Thanks,
Satyasri.
--
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Re: [rules-users] Running drools 4 code using drools 5 jars
It is my understanding that the Rule apis are being discouraged in favor of the Knowledge APIs. They do still work in Drools 5 however, so you should be ok just using that Jar file. In my own project it was actually quite easy to make the switch since most of the APIs are basic renamings. I was able to flip my project in under and hour from Rule based to Knowledge based. 2009/9/9 Nikhil D. Deshpande nikhil.deshpa...@mastek.com Hi, I have written some code using drools 4 jars. Now as drools 5 is launched, I want to migrate my existing ‘RuleBase’ (drools 4) to ‘KnowledgeBase’(drools 5). 1. Can I/Should I use RuleBase, PackageBuilder, ExternalSpreadSheetCompiler using drools 5 jars?? I can use these classes as they are present in * drools-compiler-5.0.1.jar* Is anybody facing the same issue? Please let me know if somebody has a solution for this. *Thanks Regards,* *Nikhil * MASTEK LTD. Mastek is in NASSCOM's 'India Top 20' Software Service Exporters List. In the US, we're called MAJESCOMASTEK ~~ Opinions expressed in this e-mail are those of the individual and not that of Mastek Limited, unless specifically indicated to that effect. Mastek Limited does not accept any responsibility or liability for it. This e-mail and attachments (if any) transmitted with it are confidential and/or privileged and solely for the use of the intended person or entity to which it is addressed. Any review, re-transmission, dissemination or other use of or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. This e-mail and its attachments have been scanned for the presence of computer viruses. It is the responsibility of the recipient to run the virus check on e-mails and attachments before opening them. If you have received this e-mail in error, kindly delete this e-mail from desktop and server. ~~ ___ 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] Is emptieness supported in Drools 5 (LHS)
Edson, Thanks for clarifying this. I appreciate it. Macon 2009/8/19 Edson Tirelli tire...@post.com Sometimes this is indeed not clear, so I will try to explain here. Drools uses MVEL to resolve some expressions and semantic code. Although we would like to make it 100% compatible and enable it to use mvel everywhere, that is easier said than done (but we do have someone working on that). Anytime you want to force Drools to fallback into MVEL (or java, as the other supported dialect) you need to place your code inside an eval(). For some well known situations, Drools does this automatically, but that is not the case with empty. For now, in your case, you could either do: MyGrabBag( someMap != null, someMap.empty == true ) Or if you are using mvel as your rule dialect: MyGrabBag( eval( someMap == empty ) ) []s Edson 2009/8/18 Pegram, Macon zmpeg...@choosehmc.com According to MVEL they’ve added a convenience for checking the “emptiness” of a value (see: http://mvel.codehaus.org/Value+Tests ) In MVEL you’d simply write: myMap == empty This seemed like a MUCH cleaner way to write some of the LHS of the rules, so I thought I’d try it out. Given the following rule: *rule* Check Empties - Original *when * $grabBag : MyGrabBag(someMap != null) *eval* ($grabBag.getSomeMap().size() == 0) *then* *end* * * This could be rewritten: * * *rule* Check Empties - Simple *when * MyGrabBag(someMap == *empty*) *then* *end* The IDE (Eclipse 3.4.2 w/ Drools plugin) seems to recognize “empty” is a keyword (it makes it bold), but the drools compiler in the IDE reports: BuildError: Unable to create restriction '[VariableRestriction: == empty ]' for field 'someMap' in the rule 'Check Empties - Simple' BuildError: Unable to return Declaration for identifier 'empty' Am I assuming incorrectly that the LHS is fully MVEL compliant? ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.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
