2007/6/14, rules-users-request@lists.jboss.org <rules-users-request@lists.jboss.org >:
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Today's Topics:

  1. How to get value of global variable from one rule to      another
     (Alexander Komissarov)
  2. RE: How to get value of global variable from one rule
     toanother (Anstis, Michael (M.))
  3. Re: How to get value of global variable from one rule     to
     another (Edson Tirelli)
  4. Running on z/OS... (jdepaul)


---------- Пересланное письмо ----------
From: "Alexander Komissarov" <aleks.komissarov@gmail.com>
To:  rules-users@lists.jboss.org
Date: Thu, 14 Jun 2007 16:46:07 +0300
Subject: [rules-users] How to get value of global variable from one rule to another
Hello,

Please give me advice for best way storing global variables.

global java.lang.Integer res;
global java.lang.Integer res2;
...

I've several number of rules. One rule has variable initialization e.g.:

...
rule "AmountsAreNotNull" salience 20
    when
        < conditions >
    then
       ...
        res = new Integer(a.compareTo(new BigDecimal(25)));
        res = (res == -1)?0:res;
        res = (res == -1)?0:res;
        res2 = new Integer(a.compareTo(b));
        res2 = (res2 == -1)?0:res2;
       ...
end

The values of these variables are proper and equal 1

Then next rule has comparing for res|res2 values, but they have lost their values (res == null and res2 == null)

rule "CompareValues" salience 10
    when
        res:Integer(intValue == 0)
        res2:Integer(intValue == 0)
        result:List()
    then
        result.add(Boolean.TRUE);
end

What decision you can advise me to save variables value between rules?
Thanks.
____________________
Regards,
Komissarov Alexander
mail: aleks.komissarov@gmail.com
icq: 239128267

---------- Пересланное письмо ----------
From: "Anstis, Michael \(M.\)" <manstis1@ford.com>
To: "Rules Users List" < rules-users@lists.jboss.org>
Date: Thu, 14 Jun 2007 15:03:33 +0100
Subject: RE: [rules-users] How to get value of global variable from one rule toanother
I believe globals are to be used in the RHS of a rule and not the LHS which uses "normal" facts.
 
I would suggest rule "AmountsAreNotNull" asserts new objects that activate rule "CompareValue" or something similar.
 
Saving variables between rules should be accomplished using logically asserted facts.
 
I hope this helps.
 
Mike

From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Alexander Komissarov
Sent: 14 June 2007 14:46
To: rules-users@lists.jboss.org
Subject: [rules-users] How to get value of global variable from one rule toanother

Hello,

Please give me advice for best way storing global variables.

global java.lang.Integer res;
global java.lang.Integer res2;
...

I've several number of rules. One rule has variable initialization e.g.:

...
rule "AmountsAreNotNull" salience 20
    when
        < conditions >
    then
       ...
        res = new Integer(a.compareTo(new BigDecimal(25)));
        res = (res == -1)?0:res;
        res = (res == -1)?0:res;
        res2 = new Integer(a.compareTo(b));
        res2 = (res2 == -1)?0:res2;
       ...
end

The values of these variables are proper and equal 1

Then next rule has comparing for res|res2 values, but they have lost their values (res == null and res2 == null)

rule "CompareValues" salience 10
    when
        res:Integer(intValue == 0)
        res2:Integer(intValue == 0)
        result:List()
    then
        result.add(Boolean.TRUE);
end

What decision you can advise me to save variables value between rules?
Thanks.
____________________
Regards,
Komissarov Alexander
mail: aleks.komissarov@gmail.com
icq: 239128267


---------- Пересланное письмо ----------
From: "Edson Tirelli" <tirelli@post.com>
To: "Rules Users List" < rules-users@lists.jboss.org>
Date: Thu, 14 Jun 2007 11:18:28 -0300
Subject: Re: [rules-users] How to get value of global variable from one rule to another

   Globals are intended to provide a way to pass values in and out of the engine. Not for reasoning and exchange of values between rules.
   Values that are changed by rules and are reasoned over are clearly facts of your domain and should be modeled as such.

    []s
    Edson

2007/6/14, Alexander Komissarov <aleks.komissarov@gmail.com >:
Hello,

Please give me advice for best way storing global variables.

global java.lang.Integer res;
global java.lang.Integer res2;
...

I've several number of rules. One rule has variable initialization e.g.:

...
rule "AmountsAreNotNull" salience 20
    when
        < conditions >
    then
       ...
        res = new Integer(a.compareTo(new BigDecimal(25)));
        res = (res == -1)?0:res;
        res = (res == -1)?0:res;
        res2 = new Integer(a.compareTo(b));
        res2 = (res2 == -1)?0:res2;
       ...
end

The values of these variables are proper and equal 1

Then next rule has comparing for res|res2 values, but they have lost their values (res == null and res2 == null)

rule "CompareValues" salience 10
    when
        res:Integer(intValue == 0)
        res2:Integer(intValue == 0)
        result:List()
    then
        result.add(Boolean.TRUE);
end

What decision you can advise me to save variables value between rules?
Thanks.
____________________
Regards,
Komissarov Alexander
mail: aleks.komissarov@gmail.com
icq: 239128267
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--
  Edson Tirelli
  Software Engineer - JBoss Rules Core Developer
  Office: +55 11 3529-6000
  Mobile: +55 11 9287-5646
  JBoss, a division of Red Hat @ www.jboss.com

---------- Пересланное письмо ----------
From: jdepaul <jjdepaul@us.ibm.com>
To: rules-users@lists.jboss.org
Date: Thu, 14 Jun 2007 08:42:15 -0700 (PDT)
Subject: [rules-users] Running on z/OS...

Is anyone running DROOLS on z/OS on a mainframe?!  Any reason why it would
NOT run on it?!

James

--
View this message in context: http://www.nabble.com/Running-on-z-OS...-tf3922593.html#a11122860
Sent from the drools - user mailing list archive at Nabble.com.



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Thanks all for explanations, but

Also, I've tried to map these values in the

rule "AmountsAreNotNull" salience 20
    when
       ...
    then

...

<res, res2 initialization>

map.put("result",res);
map.put("result2",res2);

...           

and check it in the next rule:

rule "CompareValues" salience 10

when

map : Map( keySet contains "result" )

...

"keyset" couldn't found "result" and "result2" mapping

but! when I've checked "keyset" in RHS part of this rule "keyset" HAS proper values of "result" and "result2":

...

then

Iterator k = map.keySet().iterator();
        while (k.hasNext())
        {
            String key = k.next().toString();
            LOGGER.info("Key: " + key + "; Value: " + map.get(key).toString());
        }

...

end

How I can check values of "result" and "result2" in LHS part of rule "CompareValues"?

Thanks,
____________________
Regards,
Komissarov Alexander
mail: aleks.komissarov@gmail.com
icq: 239128267