Further to Mauricio's reply you need to understand that rules do not activate in serial but indeed parallel, the execution of which is handled by the engine's agenda. In addition to the solution given you could consider jBPM (Rule flow) if you need to consider "dependant" execution. With kind regards, Mike 2011/2/16 Mauricio Salatino <salaboy(a)gmail.com&gt;

I got great Idea by this discussion. If there is no way of stopping rules then I can do this null condition check before executing rules. Adding one action in JBoss ESB will solve problem. Please suggest me. Many Thanks in advance. Regards, Sathya Prakash. On Thu, Feb 17, 2011 at 2:39 AM, Sathya Prakash <prakashagarval(a)gmail.com&gt;wrote: -- Cheers, Sathya Prakash. *సత్య ప్రకాష్*.

If you want to stop execution you can do kcontext.getKnowledgeRuntime().halt(); However this will only get executed once all the rules have been evaluated so it can’t be used to prevent null pointer exceptions in condtions. Another approach which may (or may not) work is to get your condition to actually throw an exception if the condition doesn’t match this will normally stop the execution as well. Eg function isNull(Object o) if(o == null) throw new ValidationException(“Object is null :(“); return false; end rule “blagh” when eval(isNull(someObject)) then //this will never be reached as an exception will be thrown End (you may need to fiddle with syntax and use a java method or something. The other key thing to remember though is if you have structured your rules correctly (null check as the very first condition) then all 100 rules will share the same null check node and you will only be doing it once not 100 times anyway and so it will make little difference on performance. (And a null check is very fast anyway). Don’t optimize until you know you actually have to – there are likely to be other far more important performance issues in your application anyway Thomas From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Sathya Prakash Sent: 16 February 2011 22:51 To: Mauricio Salatino; michael.anstis(a)gmail.com Cc: Rules Users List Subject: Re: [rules-users] how to stop rule execution I got great Idea by this discussion. If there is no way of stopping rules then I can do this null condition check before executing rules. Adding one action in JBoss ESB will solve problem. Please suggest me. Many Thanks in advance. Regards, Sathya Prakash. On Thu, Feb 17, 2011 at 2:39 AM, Sathya Prakash <prakashagarval@gmail.com<mailto:prakashagarval@gmail.com>> wrote: Thanks for your suggestion.. But let us assume i have 100 rules based on single response. When response is null then if i am doing null check in all rules then it degrades the performance. My application hits are million per day. if 1 % percent fails think about the impact. Regards, Sathya Prakash. On Thu, Feb 17, 2011 at 2:26 AM, Mauricio Salatino <salaboy@gmail.com<mailto:salaboy@gmail.com>> wrote: you can do something like: rule "Error Check" salience 100 when error condition check then System.Out.Println("Response has errors"); XXXXXXXXXXXXXXXXXXXXXXXX to exit from rule execution insert(Stop()) end rule "Rule-01" salience 99 when not(Stop()) repsonse.getxx() then end. 2011/2/16 Sathya Prakash <prakashagarval@gmail.com<mailto:prakashagarval@gmail.com>> Hi, How to stop rule execution in technical rule, Example rule "Error Check" salience 100 when error condition check then System.Out.Println("Response has errors"); XXXXXXXXXXXXXXXXXXXXXXXX to exit from rule execution end rule "Rule-01" salience 99 when repsonse.getxx() then end. if first rule then part executed means the response is error hence we should not execute second. Is there any way to exit rule execution. Regards, Sathya Prakash. _______________________________________________ rules-users mailing list rules-users@lists.jboss.org<mailto:rules-users@lists.jboss.org> https://lists.jboss.org/mailman/listinfo/rules-users -- - CTO @ http://www.plugtree.com - MyJourney @ http://salaboy.wordpress.com - Co-Founder @ http://www.jbug.com.ar - Salatino "Salaboy" Mauricio - -- Cheers, Sathya Prakash. సత్య ప్రకాష్. -- Cheers, Sathya Prakash. సత్య ప్రకాష్. ________________________________ ************************************************************************************** This message is confidential and intended only for the addressee. If you have received this message in error, please immediately notify the postmaster(a)nds.com and delete it from your system as well as any copies. The content of e-mails as well as traffic data may be monitored by NDS for employment and security purposes. To protect the environment please do not print this e-mail unless necessary. NDS Limited. Registered Office: One London Road, Staines, Middlesex, TW18 4EX, United Kingdom. A company registered in England and Wales. Registered no. 3080780. VAT no. GB 603 8808 40-00 **************************************************************************************