[rules-users] How to add Packages to RuleBase

[Esteban Aliverti]

You are using old API. Which version of drools are you using?
You need to do something like:

KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newXXXResource(YYY); , ResourceType.DRL);
//replace XXX for the type of resource you want
//add all your resources

//check for errors
if (kbuilder.hasEsrrors()){
...
}

KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());

I'm pretty sure all this steps are currently described in the
documentation.

Best Regards,

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com


On Thu, Jan 12, 2012 at 1:37 PM, srinivasasanda <srinivasasanda at gmail.com>wrote:

> Hi
>     I wrote code for creating RuleBase. But I got error at retrieving URL
> resource by passing ruleFile to the getResource() method.It is returning
> null. How to get the URL resource. I posted the sample code which  i have
> written for creating RuleBase.
> public RuleBase createRuleBase() throws Exception
> {
>                if(rules==null)
>                {
>                        throw new Exception("No rules provided for Engine");
>                }
>
>                ruleBase = RuleBaseFactory.newRuleBase();
>                PackageBuilder builder = new PackageBuilder();
>
>                for(String ruleFile : rules)
>                {
>                        System.out.println("Rule is "+ruleFile); //prints
> the ruleFile
>                        URL resource =
> this.getClass().getResource(ruleFile); //gets the URL
> resource of the ruleFile
>
>                        if(resource==null)
>                        {
>                                System.err.println("Could not find
> resource: "+ruleFile);
>                                continue;
>                        }
>
>                        File file = new
> File(this.getClass().getResource(ruleFile).getPath());
>                        if(!file.exists())
>                        {
>                                System.err.println("Could not find rule
> file: "+file.getPath());
>                                continue;
>                        }
>
>                        builder.addPackageFromDrl(new
> FileReader(file.getPath()));
>                }
>
>                org.drools.rule.Package pkg = builder.getPackage();
>                ruleBase.addPackage(pkg);
>
>                return ruleBase;
>        }
>
> My Packages are not adding to RuleBase.It is returning null.
>
> How to add the packages to ruleBase.Please suggest me
>
> Thanks
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/How-to-add-Packages-to-RuleBase-tp3653477p3653477.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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