I am trying to upgrade to the 5.1M2 build from 5.0.1 and am running into some issues. I have installed the new 5.1 Guvnor and imported the rules from my 5.0.1 Guvnor instance.
I then removed the old 5.0.1 drools jars from my app and replaced them with the 5.1M2 drools jars. I was also added all the dependent libraries. The code that worked with the 5.0.1 version does not work with the 5.1M2 version. In 5.0.1 I was constructing the xml and streaming it into the applyChangeSet method. With 5.1M2 I am just pointing to the change set xml file that is in the Guvnor.
I am seeing a NullPointerException being thrown in the processChangeSet method as shown below.
Caused by: java.lang.NullPointerException
at org.drools.agent.impl.KnowledgeAgentImpl.processChangeSet(KnowledgeAgentImpl.java:171)
at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:143)
at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:130)
Did I miss something? Am I doing something wrong? Below is the code that I have.
KnowledgeAgentConfiguration kaconf = KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
kaconf.setProperty( "drools.agent.scanDirectories", "true" );
kaconf.setProperty("drools.agent.newInstance", "false");
ResourceFactory.getResourceChangeScannerService().start();
ResourceFactory.getResourceChangeNotifierService().start();
String url = "http://rulerserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.rule.package/LATEST/ChangeSet.xml";
KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent( "Configuration", kaconf );
kagent.setSystemEventListener(new MyDroolsListener());
try {
kagent.applyChangeSet(ResourceFactory.newUrlResource(new URL(url))); // ERROR IS OCCURING INSIDE OF applyChangeSet
} catch (MalformedURLException e) {
e.printStackTrace();
}
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