[jboss-jira] [JBoss JIRA] Updated: (JBRULES-3139) NPE in KnowledgeAgentImpl due to missing change set

[Mark Proctor (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-3139?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Proctor updated JBRULES-3139:
----------------------------------

    Assignee: Edson Tirelli  (was: Mark Proctor)


> NPE in KnowledgeAgentImpl due to missing change set
> ---------------------------------------------------
>
>                 Key: JBRULES-3139
>                 URL: https://issues.jboss.org/browse/JBRULES-3139
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-core  (expert)
>            Reporter: Wolfgang Laun
>            Assignee: Edson Tirelli
>
> A missing Change Set causes a NPE in KnowledgeAgentImpl.
> import java.net.URL;
> import org.drools.*;
> import org.drools.agent.*;
> import org.drools.conf.*;
> import org.drools.builder.*;
> import org.drools.io.*;
>     public void setup() throws Exception {
> 	KnowledgeBaseConfiguration kBaseConfig =
> 	    KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
>         kBaseConfig.setOption(EventProcessingOption.STREAM);
> 	//   kBaseConfig.setOption( cehOption );
>         ResourceChangeScannerConfiguration rcsConf =
>             ResourceFactory.getResourceChangeScannerService()
>                            .newResourceChangeScannerConfiguration();
>         rcsConf.setProperty("drools.resource.scanner.interval", "20");
>         ResourceFactory.getResourceChangeScannerService().configure( rcsConf );
>         KnowledgeAgentConfiguration kaConf =
>             KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
>         kaConf.setProperty("drools.agent.scanDirectories", "true");
>         kaConf.setProperty("drools.agent.scanResources", "true");
>         kaConf.setProperty("drools.agent.newInstance", "false");
>         KnowledgeBase kBase =
>             KnowledgeBaseFactory.newKnowledgeBase(kBaseConfig);
>         KnowledgeAgent kAgent =
>             KnowledgeAgentFactory.newKnowledgeAgent( "drools agent", kBase, kaConf);
>         String urlString = "file://tmp/MissingChangeSet.xml";
>         try {
>              URL url = new URL(urlString);
>              Resource urlResource = ResourceFactory.newUrlResource(url);
> 	     if( urlResource != null ){
> 		 System.out.println( "Resource " + urlResource );
> 	     }
>              kAgent.applyChangeSet( urlResource );
>         } catch (Exception e) {
>              System.out.println("Caught exception: " + e.getMessage());
>              e.printStackTrace();
>         }
> }
> Caught exception: null
> java.lang.NullPointerException
> 	at org.drools.agent.impl.KnowledgeAgentImpl.processChangeSet(KnowledgeAgentImpl.java:223)
> 	at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:189)
> 	at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:174)
> 	at hashcode.Main.setup(Main.java:75)

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