I had problems with this too, I will use this tip :] Evals really suck. I tried to load simples rules with eval, and I couldn't get past 3000 rules. Without evals I loaded 15000.
On Monday 02 July 2007 18:00, Edson Tirelli wrote: > Eval's are indeed less performatic than any other type of constraints. > "inline-evals" are not as bad, but are also heavier than regular > constraints. > The recommendation is to avoid when possible, but for some cases it is > not possible. > > If you are using MR3 or later, you can use MVELs syntax in your > constraints: > > when > MyClass( aMapAttribute['aKey'] == "some Value" ) > then > ... > end > > The above will transparently be translated to an inline-eval, but that > is the best you can do when working with maps. > > []s > Edson > > 2007/7/2, Rajesh_Kumar <[EMAIL PROTECTED]>: > > Hi all, > > > > I want to use "eval" in my rules, but in rule writing guidelines Mark > > has > > Written that "Eval is Evil". > > > > I want to compare the values of Hash Map in my when (conditions) part. > > > > 1) Will anyone suggest something so that I can compare Hash Map keys in > > when part? > > > > 2) Does is there any performance related issue related to "eval"; > > > > Regards > > > > Rajesh > > > > -- > > This message has been scanned for viruses and > > dangerous content by MailScanner, and is > > believed to be clean. > > > > > > _______________________________________________ > > rules-users mailing list > > [email protected] > > https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list [email protected] https://lists.jboss.org/mailman/listinfo/rules-users
