Re: [rules-users] Help on using Drools with embedded objects

From: D1vy@@Ind1@ <divya.rajendranath(a)gmail.com&gt; Subject: Re: [rules-users] Help on using Drools with embedded objects To: rules-users(a)lists.jboss.org Date: Monday, March 2, 2009, 3:07 AM I have still not found a solution to the problem. The problem is that I have a non static function in my service class and i have to call thhat from my drools rule file. The function basically accepts a mail id and if a mailing list returns an arraylist of the individual mail ids in the mailing list. my drl file looks like this: ======================================================== package com.test.ams.rule dialect "java" import java.util.ArrayList; import org.json.JSONArray; import java.net.HttpURLConnection; import java.net.URL; import java.io.InputStream; import java.io.InputStreamReader; import java.io.BufferedReader; import com.test.domobjects.StaffingForm; import com.test.domobjects.StaffingFormOfferDetails; import com.test.domobjects.OfferResponseType; import function com.test.serviceImpl.StaffingFormMailingServiceImpl.expandTheMailingList; global java.util.HashMap myOSFRecipientsMap; rule "Part A" salience 20 no-loop true when $s:StaffingForm(staffingFormOfferDetails.offerValue== true && staffingFormOfferDetails.offerResponseType.offerResponseTypeName == "Accepted") then $s.setPartARecipients((ArrayList<String>)expandTheMailingList((String)myOSFRecipientsMap.get("PART_A_EXEC_COMMITTEE"))); $s.setPartARecipients((String)myOSFRecipientsMap.get("PART_A_CONFIDENTIAL")); $s.setPartARecipients((String)myOSFRecipientsMap.get("PART_A_PAYROLL")); update($s); end ======================================================== This gives me an exception -- java.lang.RuntimeException: Unable to compile "the.drl". Please let me know what is the problem here. Thanks -D D1vy@@Ind1@ wrote: > > A couple of more questions, > > I am calling my rules engine from a service and into the session i am > inserting the business object. > > In my service class, I have a few helper functions, which I need to call > from my drl file. > > How can I do that ? > > Thanks > -D > > > > Corneil du Plessis wrote: >> >> You should initialise your globals and then pass them into the session. >> Your rule file will have: >> >> global java.lang.String recipients >> global java.lang.String to >> global java.lang.String cc >> >> >> On Mon, 2009-02-23 at 06:23 -0800, D1vy@@Ind1@ wrote: >> >>> Thanks for your help , Sudhir, >>> >>> I used >>> >>> rule >>> when $a:A(b.z.s=="test"); >>> then >>> end >>> >>> And that solved my problem. >>> >>> But I would like to know one more information about global variables. >>> >>> package... >>> dialect java >>> import .., >>> >>> global java.lang.String recipients=&quot;divya(a)gmail.com&quot; >>> global java.lang.String to=&quot;xyz(a)yahoo.com&quot; >>> global java.lang.String cc=&quot;abc(a)gmail.com&quot; >>> >>> rule >>> when when $a:A(b.z.s=="divya"); >>> then >>> $a.setRecipients(recipients); >>> $a.setTo(to); >>> $a.setCC(cc); >>> update($a) >>> end >>> >>> Is this feasible with Drools. I get >>> >>> unable to comile myfile.drl file >>> [9,40]: unknown:9:40 mismatched token: [@49,201:201='=',<71>,9:40]; >>> E >>> >>> exception. Could you please help me with this too. >>> >>> >>> Thanks >>> -D >>> >>> >>> >>> >>> >>> >>> >>> >>> Sudhir M-2 wrote: >>> > >>> > Hi D, >>> > I don't know which version of drools are you using. If u are using >>> drools >>> > 4 >>> > or higher you can use 'from' to write rules on nested objects. All u >>> need >>> > to do is insert the root pbject in the working memory >>> > >>> > Regards, >>> > sudhir. >>> > >>> > On Mon, Feb 23, 2009 at 2:56 PM, Divya Rajendranath < >>> > divya.rajendranath(a)gmail.com&gt; wrote: >>> > >>> >> Hi, >>> >> >>> >> I am planning to use Drools - JBoss Rules Engine. My requirement is >>> to >>> >> disburse mails from my application to different groups based on >>> various >>> >> criteria. I want to use Drools here. >>> >> >>> >> My object structure is as follows: >>> >> >>> >> class A{ >>> >> >>> >> String B = ""; >>> >> >>> >> B b; >>> >> >>> >> C c; >>> >> } >>> >> >>> >> Hence Obj A has embedded objects within it, and obj B and C further >>> has >>> >> embedded objects. >>> >> >>> >> class B { >>> >> >>> >> String X; >>> >> >>> >> Z z; >>> >> >>> >> } >>> >> >>> >> class Z{ >>> >> >>> >> String t; >>> >> >>> >> String s; >>> >> >>> >> } >>> >> >>> >> The decision on sending the mails based on the fields in embedded >>> objects >>> >> of A. I pass instance of A to Drools >>> >> >>> >> Format of drl file: >>> >> >>> >> package...; >>> >> >>> >> import ..; >>> >> >>> >> rule "Test" >>> >> >>> >> when $a:A(B(Z(s == "testvalue"))) >>> >> >>> >> then >>> >> >>> >> $a.setSomething(); >>> >> >>> >> update($a); >>> >> >>> >> end >>> >> >>> >> I wanted to know if this (accessing fields in embedded/child object) >>> is >>> >> feasible with Drools. >>> >> >>> >> I get an error saying "UNable to compile myfile.drl when i try to fo >>> >> this. >>> >> >>> >> Could some one look into this issue and let me know the reason for >>> this ? >>> >> >>> >> >>> >> >>> >> Thanks >>> >> >>> >> -D >>> >> >>> >> _______________________________________________ >>> >> rules-users mailing list >>> >> rules-users(a)lists.jboss.org >>> >> https://lists.jboss.org/mailman/listinfo/rules-users >>> >> >>> >> >>> > >>> > _______________________________________________ >>> > rules-users mailing list >>> > rules-users(a)lists.jboss.org >>> > https://lists.jboss.org/mailman/listinfo/rules-users >>> > >>> > >>> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > > -- View this message in context: http://www.nabble.com/Help-on-using-Drools-with-embedded-objects-tp221580... 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