[rules-users] modify object Tree?

[Michael Neale]

well, if you have both room and thermometer asserted as seperate facts, you
need to modify each one if you want their changes to be re-considered (not
always the case).

The engine will then re-check all the combinations and create activations
for modified facts - basically its the same as if you retracted and asserted
those facts anew.

On 2/22/07, seeker <janko.dimitroff at dai-labor.de> wrote:
>
>
> I have a fact which holds a reference to another fact. I wonder which one
> do
> I have to modify in my RHS.
> My Objects are Room and Thermometer. Room holds reference to Thermometer
> (and that has a property describing the value).
>
> When my rule fires I want to decrease the temperature level to simulate
> that
> the room gets colder until a certain value A is reached. So the rule
> should
> be called several times until the actual level equals A.
>
> This works ONE time when I set the new value on Thermometer and modify
> Thermometer, not reaching A (the rule isnt fired again).
> But works as expected when I modify Room instead of Thermometer (rules is
> fired several times).
>
> I'm new to drools and wonder if that is desired or if I do something
> wrong.
>
> To make things more confusing: When several rules met the same conditions,
> does only one rule gets fired or do all get fired (as I read it from
> Figure
> 1.19 of the documention).
>
> If I modify Room my other rules _dont_ get fired. When I had modified
> Thermometer my other rules _do_ get fired.
>
> Is there anyone who can shed a little light on that for me?
> --
> View this message in context:
> http://www.nabble.com/modify-object-Tree--tf3268137.html#a9085281
> Sent from the drools - user mailing list archive at Nabble.com.
>
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