[rules-users] Problem with class Variable

[Mark Proctor]

We are thinking of extending the java dialect with a modify command that 
works like the mvel one; this would negate the need to use a separate 
modify statement. Just a matter of getting time to do it :(

Mark
ekke wrote:
> mehdi,
>
> the rules engine has to know that your fact changed,
> you can use PropertyChangeSupport
> take a look at the documentation
> 2.5.4.4. Update
> 2.5.4.7. Property Change Listener
> 6.5.3. The Right Hand Side (then)
>
> regards
> ekke
>
> Mehdi-6 wrote:
>   
>> hi,
>>
>> I have a class Customer.java with class variable "allTradeAmounts" and
>>
>> I have two rules as follows:
>>
>> rule "rule 1"
>>     when
>>         $c : Customer();
>>     then 
>>              
>>         $c.setAllTradeAmounts($c.getAllTradeAmounts().add(1000));   
>>        System.out.println("after modify: "+$c.getAllTradeAmounts());
>> end
>>
>> rule "rule 2"
>>     when
>>         $c : Customer(allTradeAmounts < 200 );
>>     then
>>         System.out.println("AllTradeAmounts < 200 ");
>>
>> end
>>
>> The rule 1 works fine and changes the value of this variable.
>> My question is, although the rule 1 has changed the class variable and I
>> can see the result of changed variable EACH TIME, when i insert a Customer
>> object, why is the second rule TRUE? I have changed the value of
>> AllTradeAmounts and I can print it in RHS and it is more than 200, but in
>> LHS if I check with "allTradeAmounts < 200 " ,it is true.
>> It must be FALSE and does not fire the rule.
>> can someone help me? what do I do wrong in LHS.
>> In the same rule (rule 2) if I print the allTradeAmounts it is more than
>> 200.
>> sorry it is a simple question, but I m new to drools.
>> Thanks and regards  
>>        
>> ---------------------------------
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>> it now.
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>>
>>
>>     
>
>   

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