[rules-users] unable to resolve Type Declaration class

[richarda]

Ok, i have looked at the drools source and I see the following:

TypeDeclaration lastType = null;
        try {
            // Add the type declarations to the RuleBase
            if ( newPkg.getTypeDeclarations() != null ) {
                // add type declarations
                for ( TypeDeclaration type :
newPkg.getTypeDeclarations().values() ) {
                    lastType = type;
                    type.setTypeClass( this.rootClassLoader.loadClass(
pkg.getName() + "." + type.getTypeName() ) );
                }
            }
        } catch ( ClassNotFoundException e ) {
            throw new RuntimeDroolsException( "unable to resolve Type
Declaration class '" + lastType.getTypeName() + "'" );
        }


If I debug this, I find that the  pkg.getName() + "." + type.getTypeName()
is resolved to

defaultPackage.Message

so, its trying to load a class called  "defaultPackage.Message"
which obviously isn't found..




richarda wrote:
> 
> Yeah, its in the classpath..  and to be doubly sure just before the code I
> do a 
> Message s=new Message();
> and that works.. so jvm can find the Message object.
> 
> I have created https://jira.jboss.org/jira/browse/JBRULES-2348
> I would love to know if any workarounds are possible, this has ground my
> project to a halt.
> 
> thanks
> Ric
> 
> 
> Edson Tirelli-4 wrote:
>> 
>>    Kris just reminded me of something: do you have the actual Message
>> class
>> in the test program classpath?
>> 
>>    When downloading the package from guvnor, I think it does not download
>> the model jar... only the actual rules, etc...
>> 
>>    Edson
>> 
>> 2009/11/25 richarda <richard.ambridge at gmail.com>
>> 
>>>
>>> Also tried under 5.1.0M1 release.. same issue :(
>>> Am i doing something wrong by declaring the @role in the Configuration
>>> section?
>>>
>>>
>>> richarda wrote:
>>> >
>>> > Still trying to get this to work.
>>> > I have managed to create from a default (new) guvnor setup.
>>> >
>>> > Steps I do..
>>> > 1. Create fresh guvnor
>>> > 2. In eclipse create  Message.java file in package com.sample, and
>>> create
>>> > a jar file
>>> > 3. In guvnor import the model for the Message.jar file
>>> > 4. In guvnor create a category
>>> > 5. Create an import statement for  import com.sample.Message
>>> > 6. Create a simple technical rule,  something like   when, Message(),
>>> > then, System.out.println(".");
>>> > 7. Build the pkg
>>> > 8. download the pkg
>>> >
>>> > use the code from previous post to load the pkg...
>>> > it works fine..
>>> >
>>> > now, goto guvnor advanced view and change the Configuration from:
>>> > import com.sample.Message
>>> >
>>> > to:
>>> >
>>> > import com.sample.Message;
>>> >
>>> > declare Message
>>> >   @role( event )
>>> > end
>>> >
>>> >
>>> > build the pkg,
>>> > download the pkg,
>>> > run the test program...
>>> >
>>> > I get:
>>> > org.drools.RuntimeDroolsException: unable to resolve Type Declaration
>>> > class 'Message'
>>> >       at
>>> org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:754)
>>> >       at
>>> >
>>> org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:515)
>>> >       at
>>> >
>>> org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:25)
>>> >       at com.sample.DroolsTest.readKnowledgeBase(DroolsTest.java:69)
>>> >       at com.sample.DroolsTest.main(DroolsTest.java:27)
>>> >
>>> >
>>> > richarda wrote:
>>> >>
>>> >> So, my code is doing this:
>>> >>
>>> >>  KnowledgeBaseConfiguration conf =
>>> >> KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
>>> >>             conf.setOption(EventProcessingOption.STREAM);
>>> >>             KnowledgeBuilder builder =
>>> >> KnowledgeBuilderFactory.newKnowledgeBuilder();
>>> >>             try {
>>> >>                 File f = new File("/tmp/my.pkg");
>>> >>                 InputStream stream = new FileInputStream(f);
>>> >>                 if (stream == null) {
>>> >>                     jlog.fatal("Unable to find rule pkg");
>>> >>                 } else {
>>> >>                     jlog.info("adding pkg");
>>> >>
>>> >> builder.add(ResourceFactory.newInputStreamResource(stream),
>>> >> ResourceType.PKG);
>>> >>                 }
>>> >>             } catch (Exception e) {
>>> >>                 e.printStackTrace();
>>> >>             }
>>> >>             KnowledgeBase kbase =
>>> >> KnowledgeBaseFactory.newKnowledgeBase(conf);
>>> >>            
>>> kbase.addKnowledgePackages(builder.getKnowledgePackages());
>>> >>             jlog.info("setup creating knowledge session");
>>> >>             ksession = kbase.newStatefulKnowledgeSession();
>>> >>             jlog.info(" setup ksession created");
>>> >>
>>> >>
>>> >> The pkg was created from Guvnor.
>>> >>
>>> >> If in the package declaration area in Guvnor,  (where you put the
>>> import
>>> >> statements)
>>> >> If I put
>>> >> declare Signature
>>> >>  @role ( event )
>>> >> end
>>> >>
>>> >> then build the package, save it to disk /tmp/my.pkg
>>> >> on startup I get:
>>> >>
>>> >>
>>> [#|2009-11-24T14:50:38.944+0000|WARNING|sun-appserver2.1|javax.enterprise.system.stream.err|_ThreadID=12;_ThreadName=pool-1-thread-3;_RequestID=7c35064d-757e-4519-b5eb-433db89e168d;|org.drools.RuntimeDroolsException:
>>> >> unable to resolve Type Declaration class 'Signature'
>>> >>      at
>>> >>
>>> org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:754)
>>> >>      at
>>> >>
>>> org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:515)
>>> >>      at
>>> >>
>>> org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:25)
>>> >>
>>> >>
>>> >> I need to declare 'Signature' as an 'event'
>>> >> Am I doing this wrong?
>>> >>
>>> >> If I do this all in Eclipse and load the DRL files manually it all
>>> works.
>>> >>
>>> >
>>> >
>>>
>>> --
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>>>
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>>>
>> 
>> 
>> 
>> -- 
>>  Edson Tirelli
>>  JBoss Drools Core Development
>>  JBoss by Red Hat @ www.jboss.com
>> 
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>> 
>> 
> 
> 

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