[rules-users] How to insert values into drl

[Wolfgang Laun]

You'll have to something like

   FactType factType = kieContainer.getKieBase().getFactType(
packagename, "NumberCompare" );

Now you may
   Object nc = factType.newInstance();
   factType.set( nc, "numberone", Integer.valueOf( 42 ) );
   ...
   kieSession.insert( nc );

Of course, declaring and instantiating a POJO causes much less
headscratching, so why don't you do that?

-W

On 08/12/2013, anjana.ackroyd <anjana.ackroyd at gmail.com> wrote:
> Hi,
> I am new to drools and trying to figure out how to get this simple example
> working.
> I have intellij IDE .
> I am trying to compare two numbers using drools 6.x and dont know how to
> insert numberone and numbertwo after I get my drl file into my file system
>
> Here is my code
>
> RuleRunner.java
> package com.cambiahealth.enterprise.service.droolsrule;
>
> import org.kie.api.KieServices;
> import org.kie.api.builder.KieBuilder;
> import org.kie.api.builder.KieFileSystem;
> import org.kie.api.builder.KieRepository;
> import org.kie.api.builder.Message.Level;
> import org.kie.api.io.KieResources;
> import org.kie.api.io.Resource;
> import org.kie.api.runtime.KieContainer;
> import org.kie.api.runtime.KieSession;
>
> public class RuleRunner
> {
>     private KieServices kieServices;
>     private KieContainer kieContainer;
>     private KieSession kieSession;
>     private KieResources kieResources;
>     private KieFileSystem kieFileSystem;
>     private KieRepository kieRepository;
>
>     public RuleRunner()
>     {
>         this.kieServices = KieServices.Factory.get();
>         this.kieResources = kieServices.getResources();
>         this.kieFileSystem = kieServices.newKieFileSystem();
>         this.kieRepository = kieServices.getRepository();
>     }
>
>
>     public void addRuleFile(String packagename, String rulefile)
>     {
>         Resource resource = kieResources.newClassPathResource(rulefile);
>
>         packagename = packagename.replace(".","/");
>
>         String resourcepath =
> "src/main/resources/"+packagename+"/"+rulefile;
>
>         kieFileSystem.write(resourcepath, resource);
>     }
>
>     public KieSession buildKnowledgeSession()
>     {
>         KieBuilder kb = kieServices.newKieBuilder(kieFileSystem);
>
>         kb.buildAll();
>
>         if (kb.getResults().hasMessages(Level.ERROR))
>         {
>             throw new RuntimeException("Build Errors:\n" +
> kb.getResults().toString());
>         }
>
>         kieContainer =
> kieServices.newKieContainer(kieRepository.getDefaultReleaseId());
>
>         kieSession = this.kieContainer.newKieSession();
>
>         return kieSession;
>     }
>
>     public KieSession fireAllRules()
>     {
>         kieSession.fireAllRules();
>
>         return kieSession;
>     }
>
>     public void dispose()
>     {
>         this.kieSession.dispose();
>     }
> }
> 							
>
>
>
>
>
> My numbercompare.drl
>
>
> declare NumberCompare
>     message: String
>     numberone: Integer
>     numbertwo: Integer
> end
>
> rule "numberone is equals to numbertwo"
>     when
>         n: NumberCompare(numberone == numbertwo);
>
>     then
>         n.setMessage("numberone is equals to numbertwo");
> end
>
> rule "numberone is greater than numbertwo"
>     when
>         n: NumberCompare(numberone > numbertwo);
>
>     then
>         n.setMessage("numberone is greater than numbertwo");
> end
>
> rule "numberone is less than numbertwo"
>     when
>         n: NumberCompare(numberone < numbertwo);
>
>     then
>         n.setMessage("numberone is less than numbertwo");
> end
>
>
>
>
>
>
>
>
>
> My DroolsService.java where I want to pass in values 1 and 2 to the drl
> file
>
>
>         runner.addRuleFile("drools", "compareNumberRule.drl");
>
>        KieSession kieSession = runner.buildKnowledgeSession();
>       //How do I pass 1 as numberone and 2 as numbertwo values ????? before
> firerules
>         runner.fireAllRules();
>         runner.dispose();
>         return number.getMessage();  //To change body of implemented
> methods
> use File | Settings | File Templates.
>     }
> }
>
>
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/How-to-insert-values-into-drl-tp4027151.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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