[rules-users] Exception Handling in the rule consequence

[sumatheja]

Hi Wolfgang,
                  I am actually writing all the rules in a .drl and
importing them into a guvnor. I didn't mention the dialect explicitly
anywhere in the code. Is the default dialect MVEL. Is there a way to make
one time declaration of dialect in my case instead of declaring it for all
the rules.

2010/10/13 Wolfgang Laun <wolfgang.laun at gmail.com>

> I'd say you are using
>    dialect "mvel"
> There is no try/catch statement in MVEL. You have the options:
>
> (1) Use Java, not MVEL.
>
> (2) Surround the fireAllRules() with try/catch and put it in a loop that's
> terminated
> if there is no exception.
>
> -W
>
>
> 2010/10/13 sumatheja <sumatheja at gmail.com>
>
>> Hi All,
>>         I have a set of rules. After firing the rules if an exception
>> occurs in a rule the following rules are not getting evaluated. So i tried
>> writing a try catch block inside the consequence part of the rule, but then
>> i get an error saying "'unable to build the consequence.[Error:was expecting
>> type: java.lang.Object but found type:null]"
>>
>> Here follows my code
>>
>>
>> *rule 'Test rule'
>> ruleflow-group "Test Ruleflow"
>> no-loop
>>     when
>>         $c:Car()
>>         Driver()
>>
>>     then
>>        try{
>>           $c.getModel()
>>           } catch (Exception Ee) {
>>            System.out.println("caught an exception: "+Ee.toString());
>>           }
>> end*
>>
>> However if i remove the try catch block it buils fine.
>>
>> Can anyone let me know if i'm missing something here.
>>
>> Thanks in advance :)
>> --
>> cheers
>> Sumatheja
>>
>>
>>
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>
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-- 
cheers
Sumatheja Dasararaju
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