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