Hi,
The Drools website refers to "Rete-oo", but I'm not sure I understand it
correctly ... especailly the "Extract Node" (mentioned in the documentation).
Suppose I have a class "Stock" which encapsulates some data
(for simplicity, I use only Objects, eg "java.lang.Double" ):
class Stock{
Double price;
Double expectedProfit;
Double risk;
}
Now, suppose I want to do
"assertObject(someStock)"
But I was the stock to enter the Rete as a Tuple of length 3 (price, profit,
risk) , rather than Tuple of length 1 (just 1 Stock encapsulating everything).
I understand the 3-tuple approach might give better performance, especially
if you're about to play around with just one of the attributes (e.g. run the
same simulation over and over again, each time with just a different "risk",
while everything else remains fixed).
Is that what the Extract Node does ?
If so, how do you cause it to work - what exactly should you put in the <
parameter > part of the rule ?
Thanks very much.
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