[rules-users] Dynamic Rules and Eval

[Wolfgang Laun]

It's a bug, possibly a regression from 5.2.0 that has been in 5.3.0,
5.4.0 and is still in  5.5.0.

It should be very simple to add http://codetidy.com/6206/ as a test
case so that this will be fixed.

-W


On 14/07/2013, Wolfgang Laun <wolfgang.laun at gmail.com> wrote:
> Which Drools version do you use?
>
> On 14/07/2013, k <rrdh at gmx.net> wrote:
>> Hi,
>> basically it's the same problem this guy had
>> http://stackoverflow.com/questions/11485122/non-template-dynamic-rules-in-drools
>> <http://stackoverflow.com/questions/11485122/non-template-dynamic-rules-in-drools>
>>
>> , but the links in that question don't work.
>>
>> I'd like to dynamically add rules to a running session, but can use
>> 'eval'
>> only in the very first one. If I add a second rule like the following, it
>> won't execute:
>>
>> ---
>>
>> String test2 =
>>   "\nrule id4" +
>>   "\nwhen" +
>>   "\neval(0 == 0)" + // if this eval is removed, "done2" is inserted
>>   "\nthen" +
>>   "\ninsertLogical( \"done2\" );" +
>>   "\nend";
>>
>> kbuilder.add(ResourceFactory.newByteArrayResource(test2.getBytes()),
>> ResourceType.DRL);
>> session.getKnowledgeBase().addKnowledgePackages(kbuilder.getKnowledgePackages());
>> 	
>> fired = session.fireAllRules();
>> System.out.println(fired); // 0
>> effects = session.getObjects();
>> assertTrue("fired", effects.contains("done2")); // fails
>>
>> ---
>>
>> You can see the complete Test at http://codetidy.com/6206/
>>
>> I'm also not sure if this is the correct way to dynamically add rules, so
>> please let me know, if there's a better way to add rules from strings.
>>
>> How can I dynamically add new rules to a running session and still use
>> eval?
>>
>>
>>
>> --
>> View this message in context:
>> http://drools.46999.n3.nabble.com/Dynamic-Rules-and-Eval-tp4024908.html
>> Sent from the Drools: User forum mailing list archive at Nabble.com.
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>