[rules-users] Drools 5 setGlobal

[Samuli Saarinen]

Actually I am trying to set an unexistent variable (test2) in both 
snippets. But for some reason only the second one produces the exception.

Samuli

Salaboy wrote:
> Well, in the second code snippet you are trying to set an unexistent  
> variable called test2. For setting a global variable you need to  
> define it first in the drl file. Greetings!
> 
> - CTO @ http://www.plugtree.com
> - MyJourney @ http://salaboy.wordpress.com
> - Co-Founder @ http://www.jbug.com.ar
> - Mauricio "Salaboy" Salatino -
> 
> On Jun 22, 2010, at 4:32, Samuli Saarinen <samuli.saarinen at remion.com>  
> wrote:
> 
>> Hello,
>>
>> I'm new to drools and have problems with globals or with the different
>> behaviour of drools depending on how the globals are specified.
>>
>> I have the following simple rule:
>>
>> global String test
>>
>> rule "Global"
>>   when
>>   then
>>     System.out.println(test);
>> end
>>
>> If i run the rule with:
>>
>> KnowledgeBase kb = getKnowledgeBase("global.drl");
>> StatelessKnowledgeSession ses = kb.newStatelessKnowledgeSession();
>> ses.setGlobal("test2", "foo");
>> ses.execute("");
>>
>> I get the expected result of null printed
>>
>> but if I use commands:
>>
>> KnowledgeBase kb = getKnowledgeBase("global.drl");
>> StatelessKnowledgeSession ses = kb.newStatelessKnowledgeSession();
>> List<Command<?>> cmds = new ArrayList<Command<?>>();
>> cmds.add(CommandFactory.newSetGlobal("test2", "bar"));
>> cmds.add(CommandFactory.newInsert(""));
>> ses.execute(CommandFactory.newBatchExecution(cmds));
>>
>> I get java.lang.RuntimeException: Unexpected global [test2]
>>
>> Why is the behaviour different and which one is correct?
>>
>> Regards,
>>
>> Samuli
>>
>>
>> -- 
>> Remion Oy           Etävalvontajärjestelmät liiketoiminnan
>> Samuli Saarinen           tehostamiseen
>> gsm +358 (0)50 3560075
>> fax +358 (0)3 2125064       www.remion.com
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-- 
Remion Oy           Etävalvontajärjestelmät liiketoiminnan
Samuli Saarinen           tehostamiseen
gsm +358 (0)50 3560075
fax +358 (0)3 2125064       www.remion.com