2009/11/3 Hemanth kumar <hemanth@saha.in>

hi,
Im working on a sample test project.
In that im dynamically creating a class ( fact) and compiling it.

here is my test project
--------------------------------------------------------------------------------------
mainJavaclass

public void runRule()
{
try {
System.out.println("\nRunning rule\n");

// go !

URL[] urls = new URL[]{ new
URL("file://"+path) };

URLClassLoader ucl = new
URLClassLoader(urls);
Class<?> clazz =
ucl.loadClass("test.Message");
Object classObj = clazz.newInstance();

Method method =
clazz.getDeclaredMethod("setMessage", new Class[]{String.class});

//System.out.println("facts loaded\n");

method.invoke(classObj, new
Object[]{"Hello"});

log.info("==== Calling Rule Runner ======");

Collection facts = new ArrayList();
facts.add(classObj);

// Load and fire our rules files against the
data
new
RuleRunner().runStatelessRules(RULES_FILES, null, facts, null, null,
logger);

}
catch (Throwable t) {
t.printStackTrace();
}

}

----------------------------------------------------------------------
Fact

package test;
public class Message{
private String message;
public String getMessage(){
return this.message;
}

public void setMessage(String message) {
this.message = message;
}

}

------------------------------------------------------------------------
sample rule

package test
import test.Message;

rule "Your First Rule"
dialect "mvel"
when
m:Message(message != "Good Bye" )
then
System.out.println("First Rule fired "+m.message );
modify(m){ message = "Good Bye"};
end
-----------------------------------------------------------------
http://old.nabble.com/file/p26160051/console.PNG console.PNG

what happens is when i was running the project inside eclipse IDE it works
fine but when i hosted in tomcat and calling from outside ide the rule is
not getting fired.
I think the dyanamically loaded class is not recognised by the rule engine.

suggest me any ideas or post an working example

Hemanth
--
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