package org.drools.examples;
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.logger.KnowledgeRuntimeLogger;
import org.drools.logger.KnowledgeRuntimeLoggerFactory;
import org.drools.runtime.StatefulKnowledgeSession;
public class FibonacciExample {
public static void main(final String[] args) throws Exception {
final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newClassPathResource( "Fibonacci.drl",
FibonacciExample.class ),
ResourceType.DRL );
final KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
final StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger(ksession, "log/fibonacci");
ksession.insert( new Fibonacci( 10 ) );
ksession.fireAllRules();
logger.close();
ksession.dispose(); // Stateful rule session must always be disposed when finished
}
public static class Fibonacci {
private int sequence;
private long value;
public Fibonacci() {
}
public Fibonacci(final int sequence) {
this.sequence = sequence;
this.value = -1;
}
public int getSequence() {
return this.sequence;
}
public void setValue(final long value) {
this.value = value;
}
public long getValue() {
return this.value;
}
public String toString() {
return "Fibonacci(" + this.sequence + "/" + this.value + ")";
}
}
}