[rules-users] query in drools expert :: rule language

[Wolfgang Laun]

Starting with Drools 5.2, general boolean expressions
should work, but there were problems. Which version are
you using?

Why doesn't averageCPU have a numeric type? Then the comparison would be
straightforward (and most efficient).

To be on the safe side with String, use
   $cpuUsage : cpuTracker(
      eval( Integer.parseInt($cpuUsage.getAverageCPU()) > 60 ) )

-W

On 26 December 2011 06:50, bobbi_80 <guruprasad_bobbi at infosys.com> wrote:

> Hi ,
>
> I want to know if there is any way I can evaluate a string in rule
> language.
> Here is what I am doing
>
> DroolsTest.java has a class as follows.
>
> DroolsTest.java
>
>        public static class cpuTracker{
>
>                private String machinename;
>                private String averageCPU;
>        }
> I want to set a rule in sample.drl such that if the averageCPU is greater
> than 80 an action is taken.
>
> Sample.drl
> rule "High CPU Usage"
>        when
>                $cpuUsage : cpuTracker( Integer.parseInt(averageCPU) > 60 )
>        then
>                System.out.println("CPU usage is very high!!");
> end
>
> The compiler throws the following error " *no viable alternative at
> averageCPU for rule High CPu usage*".
> I am unable to convert string to int using Inetger.parseInt(). Any idea why
> it is throwing me an error and any help with rule language syntax that I
> can
> get online? Can't find all the answers from
>
> http://docs.jboss.org/drools/release/5.2.0.Final/drools-expert-docs/html_single/index.html
>
> Any help is highly appreciated.
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/query-in-drools-expert-rule-language-tp3612345p3612345.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20111226/7b71dd33/attachment.html