October 2007 - rules-dev - Jboss List Archives

by Geoffrey De Smet

I've just switched solver to use slf4j: http://jira.jboss.com/jira/browse/JBRULES-1233 I am advising to configure drools-repository and drools-jbrms's logging dependency's like this:  <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <scope>test</scope> </dependency> They both need a directy dependency on slf4j-api, because you should only really on transitive dependencies if the only reason you need a transitive dependency is because one of your direct dependencies needs it. Since Logger is used directly, a direct dependency on slf4j-api should be put at scope compile. I don't think drools-repository/jbrms want to force their users to use log4j. But unless slf4j-log4j12 is put at test scope (or another scope with optional true) that is the case. Currently it's like this: we use a logging facade so you can log with anything, but we force you to use log4j anyway (luckily users could have excluded it meanwhile as a workaround). Maybe the log4j dependency is obsolete (as slf4j-log4j12 brings it in), but he solver examples use a domconfigurer directly, so at least solver needs it :/ PS: could we upgrade to the latest slf4j libs? We're at 1.3.0 and the latest is 1.4.3 http://www.mvnrepository.com/artifact/org.slf4j/slf4j-api For solver it shouldn't give a problem, maybe for drools-repository it will? -- With kind regards, Geoffrey De Smet

18 years, 10 months

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how to use rule files generated by Guided DRL editor

by Sourav.Biswas＠cognizant.com

Hi, I had been trying to write rules using the guided DRL editor. I am new to Drools and have just started using it. I am getting two files- one with .brxml extension and another one with .package extension. Cud u kindly give me some information on which classes to use in my java code in order to use these rules. A sample code(if possible) would be very helplful. Thanks And Regards, Sourav Biswas This e-mail and any files transmitted with it are for the sole use of the intended recipient(s) and may contain confidential and privileged information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. Any unauthorised review, use, disclosure, dissemination, forwarding, printing or copying of this email or any action taken in reliance on this e-mail is strictly prohibited and may be unlawful.

18 years, 10 months

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test snapshots

by ekke

just tested the latest snapshot before I always used only the 4.0.1 because I'm new to this list - if I find bugs, should I post this here in the drools-dev list or should I report a JIRA (or both) just recognized that one of my unit-tests fails and the reason is a class cast exception using snapshot (4.0.1 runs this test fine) so I reported a JIRA (JBRULES-1245) - hope its the right way ekke -- View this message in context: http://www.nabble.com/test-snapshots-tf4560614.html#a13015242 Sent from the drools - dev mailing list archive at Nabble.com.

18 years, 10 months

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drl parser tests

by Mark Proctor

Edson, I notice that RuleParserTest.testLatinChars is failing, and you've marked it as FIX_ME (btw its FIXME). Is this a FUTURE, or meant to be fixed for 4.0.2? Also I notice we hvae RuleParserTest and DrlParserTest, do we have a clean rule of thumb here which goes in which test - as it seems to overlap to me? Mark

18 years, 10 months

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Comment from doing the NumberGuess (RuleFlow) example

by Paul Browne

Folks, Two general comments on the format of the RuleFlow (.rf) file from when I was doing the NumberGuess documentation. When I built workflow apps using jBPM I was able to edit the workflow XML files by hand. Some people prefer this and it makes it easier should somebody want to build an alternative editor for these files (e.g Web Based instead of the Eclipse IDE). For jBPM I *had* to edit these manually , as the IDE kept crashing. The comment / complaint is that the Drools Ruleflow files are much harder to edit. Yes, it's xml but the nodes do not seem to be in any particular order. With jBPM , the nodes tend to be arranged in a flow from Start to End. Talking of Web Based editors for flow, have you seen the Ajax / DHTML Editor that Yahoo has for Pipes: http://firstpartners.net/blog/technology/xml/2007/03/23/yahoo-pipes-in-10... This shows that it is possible to have a Flow editor implemented in HTML. Just my two thoughts. Paul On 10/1/07, Mark Proctor <mproctor(a)codehaus.org> wrote: > > Feedback welcome. > http://blog.athico.com/2007/10/drools-examples-documentation-gets.html > > Mark > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev >

18 years, 10 months

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Re: JBoss rules execution algorithm

by Mark Proctor

For the case when r2 has the 'not'. When 4 doesn't exist r3 is true, when r3 fires it asserts 4, thus r3 can no longer be true, however r4 retracts the 4 and 2 still exists, thus enabling r3 to match again which causes the recursion - basically the insertion and retracting of 4 is toggling r3 on and off. Best thing to do is always use the audit log so you can visualise what's going on. Mark lukichev wrote: > > Dear Mark, > > > > I have a question concerning rule execution algorithm in JBoss 4.0.1. > > > > There are 2 rule sets, one runs in a circle and another one stops. > > > > The first one, which stops: > > > > *rule* "r1" > > *when* > > $num1:Integer(intValue == 1) > > *then* > > *insert*(*new* Integer(2)); > > *end* > > > > *rule* "r2" > > *when* > > $num1:Integer(intValue == 2) > > *then* > > *insert*(*new* Integer(3)); > > *end* > > > > *rule* "r3" > > *when* > > $num1:Integer(intValue == 2) > > *then* > > *insert*(*new* Integer(4)); > > *end* > > > > *rule* "r4" > > *when* > > $num1:Integer(intValue == 3) > > $num2:Integer(intValue == 4) > > *then* > > *retract*($num2); > > *end* > > * * > > The second one, which runs in a circle, is different from the one > above by the additional condition in r3: > > > > *not* $num2:Integer(intValue == 4) > > > > I would expect the same behavior of these two rule sets, but it is > different. Could you, please, comment, why this is so? > > > > Sincerely, > > Sergey Lukichev > > Research Assistant, REWERSE I1, rule modeling and markup >

18 years, 10 months

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Drools Examples Documentation Gets Beefed Up

by Mark Proctor

Feedback welcome. http://blog.athico.com/2007/10/drools-examples-documentation-gets.html Mark

18 years, 10 months

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rules-dev October 2007