Hi Edson,

I can't provide a test case. But I've figured out what the exception are about. It's not about the code I've posted before. It's about the exceptions that the java.util.Set.add() method throws. I've attached the concerned code at the end.
That means for me I have to manage the exception handling. I've tried to google the topic. The best I came up with is a mailing list entry: http://drools-java-rules-engine.46999.n3.nabble.com/Exception-handling-policy-td113782.html Would that be the correct solution? If yes, how do I implement the handler? I would be thankful for a code example.

The code that the exception references is:

declare Watcher
    @role ( event )

    triggeringValue : Value
    numberOfContainedValues : int
    valueSet : Set // Set<Value>
end

// ....

function Watcher generateWatcherEvent(Value firstValue) {
    Watcher watcher = new Watcher();
    watcher.setNumberOfContainedValues(1);
    watcher.setTriggeringValue(firstValue);

    // add value to set
    Set set = watcher.getValueSet();
    set.add(firstValue);
    watcher.setValueSet(set);

    return watcher;
}

Thanks for your help! :)

Tina

Am 13.08.2010 01:14, schrieb Edson Tirelli:

   Hi Tina,

   Can you provide a test case?

   Edson

2010/8/12 Tina Vießmann <tviessmann@stud.hs-bremen.de>

Hi again ...

I would like to insert a new generated object into the knowledge base.
It seems that
insert (new Watcher())
is working. But
Watcher watcher = new Watcher();
insert (watcher);
isn't working?

Why?

Thank you for any explanations. :)

Tina
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Edson Tirelli
JBoss Drools Core Development
JBoss by Red Hat @ www.jboss.com
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