Hi
I would like to test the time taken to run a single rule (eg.
HelloWorldExample from Drools5.0 documentation) against large data size (i.e
the object inserted in ksession is 10,000). The .drl file is loaded only
once and i am looping the part where message object is created and set with
values and inserted into ksession for 10,000 times. The time taken was 10.7
secs on an average. Am i doing something wrong? Can i improve it in anyway?
Your help is appreciated.
thanks
ABRA
HelloWorld.drl :
package org.drools.examples
import org.drools.examples.HelloWorldExample.Message;
global java.util.List list
rule "Hello World"
dialect "mvel"
when
m : Message( status == Message.HELLO, message : message)
then
System.out.println( message );
modify ( m ) { message = "Goodbye cruel world",
status = Message.GOODBYE };
end
rule "Good Bye"
dialect "java"
when
Message( status == Message.GOODBYE, message : message )
then
System.out.println( message );
end
HelloWorldExample.java
/**
* This is a sample file to launch a rule package from a rule source file.
*/
public class HelloWorldExample {
public static final void main(final String[] args) throws Exception {
final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory
.newKnowledgeBuilder();
// this will parse and compile in one step
kbuilder.add(ResourceFactory.newClassPathResource("HelloWorld.drl",
HelloWorldExample.class), ResourceType.DRL);
// Check the builder for errors
if (kbuilder.hasErrors()) {
System.out.println(kbuilder.getErrors().toString());
throw new RuntimeException("Unable to compile
\"HelloWorld.drl\".");
}
// get the compiled packages (which are serializable)
final Collection<KnowledgePackage> pkgs = kbuilder
.getKnowledgePackages();
// add the packages to a knowledgebase (deploy the knowledge
packages).
final KnowledgeBase kbase =
KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages(pkgs);
final StatefulKnowledgeSession ksession = kbase
.newStatefulKnowledgeSession();
ksession.setGlobal("list", new ArrayList());
ksession.addEventListener(new DebugAgendaEventListener());
ksession.addEventListener(new
DebugWorkingMemoryEventListener());
// setup the audit logging
KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory
.newFileLogger(ksession, "log/helloworld");
long starttime = System.currentTimeMillis();
for(int u=0;u<10000;u++)
{
final Message message = new Message();
message.setMessage("Hello World");
message.setStatus(Message.HELLO);
ksession.insert(message);
ksession.fireAllRules();
}
long endtime = System.currentTimeMillis();
System.out.println("execution time is "+(endtime-starttime));
logger.close();
ksession.dispose();
}
public static class Message {
public static final int HELLO = 0;
public static final int GOODBYE = 1;
private String message;
private int status;
public Message() {
}
public String getMessage() {
return this.message;
}
public void setMessage(final String message) {
this.message = message;
}
public int getStatus() {
return this.status;
}
public void setStatus(final int status) {
this.status = status;
}
public static Message doSomething(Message message) {
return message;
}
public boolean isSomething(String msg, List list) {
list.add(this);
return this.message.equals(msg);
}
}
}
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