package org.drools.examples.ruleflow;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.runtime.process.WorkItem;
import org.drools.runtime.process.WorkItemHandler;
import org.drools.runtime.process.WorkItemManager;
public class WorkItemExample {
public static final void main(String[] args) {
try {
KnowledgeBase knowledgeBase = readRule();
StatefulKnowledgeSession ksession = knowledgeBase.newStatefulKnowledgeSession();
// logging all work items to System.out
WorkItemHandler handler = new WorkItemHandler() {
public void executeWorkItem(WorkItem workItem, WorkItemManager manager) {
System.out.println("Executing work item " + workItem);
manager.completeWorkItem(workItem.getId(), null);
}
public void abortWorkItem(WorkItem workItem, WorkItemManager manager) {
// Do nothing
}
};
ksession.getWorkItemManager().registerWorkItemHandler( "Email", handler );
ksession.getWorkItemManager().registerWorkItemHandler( "Log", handler );
ksession.startProcess( "com.sample.ruleflow" );
ksession.fireAllRules();
} catch ( Throwable t ) {
t.printStackTrace();
}
}
private static KnowledgeBase readRule() throws Exception {
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newClassPathResource( "workitems.rf", WorkItemExample.class ),
ResourceType.DRF );
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
return kbase;
}
}