Thanks Thomas! That was the key!

	RuleTable
	CONDITION	CONDITION	ACTION
	product: Product	carton: Carton
	brand: brand	description: description	carton.setGood($param);
Cases	hoover match case
Brand Check	hoover	big box	true
Bad Brand	walmart	little box	false

Robert Costello

Lead Systems Engineer

IMA Performance

E3- 279A

847.286.0910

-----Original Message-----
From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Hehl, Thomas
Sent: Friday, January 16, 2009 10:25 AM
To: Rules Users List
Subject: RE: [rules-users] How to access data after rule fires

Is carton used on the left hand side of the rule? All actions can only take place against an instance that was referred to on the LHS.

From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Costello, Robert
Sent: Friday, January 16, 2009 10:52 AM
To: Rules Users List
Subject: RE: [rules-users] How to access data after rule fires

The next issue I’m running into is referencing a method in another class for the action. In this case, we get a compile error “Carton.carton cannot be resolved”

I have both objects in the import statement. Is the syntax incorrect?

	RuleTable
	CONDITION	ACTION
	product: Product	carton: Carton
	brand: brand	carton.isGood($param);
Cases	hoover match case
Brand Check	hoover	TRUE
Bad Brand	walmart	FALSE

Robert Costello

Lead Systems Engineer

IMA Performance

E3- 279A

847.286.0910

-----Original Message-----
From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Costello, Robert
Sent: Tuesday, January 13, 2009 12:34 PM
To: Rules Users List
Subject: RE: [rules-users] How to access data after rule fires

So, ultimately this helped. One other thing I needed to get this working was a variable for my object, like you said below (brand.setGoodBrand). Once I changed that, it fired. The suggestion to use parameters was also good as it allows for more rule flexibility. When I used the setGoodBrand(true), it only worked if there was some sort of value in the action column for the rule, even an ‘x’, as Steven suggested. And I am able to get the changed values either by direct reference to the object or by getting the object from the session.

Thanks to Edson and Steven for the fast replies!

	RuleTable
	CONDITION	ACTION
	product: Product
	brand: brand	product.setGoodBrand($param);
Cases	hoover match case
Brand Check	hoover	TRUE
Bad Brand	walmart	FALSE

Robert Costello

-----Original Message-----
From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Steven Williams
Sent: Monday, January 12, 2009 6:26 PM
To: Rules Users List
Subject: Re: [rules-users] How to access data after rule fires

If you put an X or something in the cell (i.e. just don't leave it empty) it should also work.

On Tue, Jan 13, 2009 at 10:57 AM, Edson Tirelli <tirelli@post.com> wrote:

     The action is not being executed. I don't use decision tables frequently, but I think that it ignores empty cells and is generating an empty consequence for your rule. Usually, you would place the method call on the header prototype and the parameter in the cell. So your cell would be:

| hoover | true |
| xyz | false |

     The method prototype would be something like (please check the correct syntax in the manual):

brand.setGoodBrand( $param );

     Where the engine would replace $param by the value you write in the cell.

[]s
Edson

2009/1/12 Costello, Robert <rcost10@searshc.com>

I tried that and it returned false, which doesn't make sense to me since the rule firing is to set the value to true, and in the execution the rule does fire.

StatefulKnowledgeSession session = kbase.newStatefulKnowledgeSession();

Product p = new Product();

p.setBrand("hoover");

session.insert( p );

int u = session.fireAllRules();

System.out.println(u + " many rules fired");

System.out.println("is brand good? " + p.isGoodBrand());

Here's a snippet of the rule (decision table)

	CONDITION	ACTION
	Product
	brand	setGoodBrand(true);
Cases	hoover match case
Brand Check	hoover

And the console returns:

1 many rules fired

is brand good? false

Robert Costello

Lead Systems Engineer

IMA Performance

E3- 279A

847.286.0910

-----Original Message-----
From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Edson Tirelli
Sent: Monday, January 12, 2009 4:16 PM
To: Rules Users List
Subject: Re: [rules-users] How to access data after rule fires

   Can't you keep the reference to your object while firing the rules?

MyObject x = ...
ksession.insert( x );
ksession.fireAllRules();
boolean result = x.getBooleanAttribute();

    []s
    Edson

2009/1/12 Costello, Robert <rcost10@searshc.com>

So, how do I access data after the rules fire?

If one has a rule which modifies a field on an object (a boolean, for
example), and you want to return the object after the rules are
complete, how do you do it?

I tried this using a StatefulKnowledgeSession, getting an object
collection after the rules fire, but I don't see that this works.

Also googled the heck out of this and looked in all the documentation.
I must be missing something, because the docs generally are pretty good.

Any hints?

Thanks in advance,

Robert Costello

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Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com

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--
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JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com

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