Re: [rules-users] How to write a rule like this

Hello, Hello, I just tried this rule, but it doesn't seem to work as expected. What I have now is every time I have an EventA received then a pattern is reported matched no matter whether any of the other constrains is met. Any ideas? Best Regards, Kevin Zhao 2010/10/26 Michael Anstis <michael.anstis(a)gmail.com&gt; > > You could try this too; if you don't want lots of new attributes for your > model:- > > rule "three A" > when > $a1: EventA( $index : index ) > $a2: EventA( index == $index ) > $a3: EventA( index == $index ) > not PatternConsumer( name == 'AAA', events contain $a1 || contais $a2 || > contains $a3) > not EventB( this after[0ms] $a1 && before[0ms] $a3, index == $index ) > then > // ... match > PatternConsumer pc = new PatternConsumer("AAA", $a1, $a2, $a3 ); > insert(pc); > end > > > 2010/10/25 Wolfgang Laun <wolfgang.laun(a)gmail.com&gt; >> >> Giving those other rules a higher salience is one way, but I think >> it is better to add a boolean field "usedForAAA" to class EventA. >> >> rule "three A" >> when >> $a1: EventA( $index : index, usedForAAA == false ) >> $a2: EventA( index == $index, usedForAAA == false ) >> $a3: EventA( index == $index, usedForAAA == false ) >> not EventB( this after[0ms] $a1 && before[0ms] $a3, index == $index ) >> then >> // ... match >> modify( $a1 ){ setUsedForAAA( true ) } >> modify( $a2 ){ setUsedForAAA( true ) } >> modify( $a3 ){ setUsedForAAA( true ) } >> end >> >> -W >> >> >> 2010/10/25 赵侃侃 <kevin223(a)gmail.com&gt; >>> >>> Thanks Wolfgang, >>> It now starts to make sense to me. However, is it possible that I don't >>> retract those matched eventA? All those events might be used to evaluate >>> against other rules. >>> Thanks again, >>> Kevin Zhao >>> 2010/10/25 Wolfgang Laun <wolfgang.laun(a)gmail.com&gt; >>>> >>>> I assume you are using Fusion, using a session clock so that temporal >>>> operators are available. >>>> >>>> rule "three A" >>>> when >>>> $a1: EventA( $index : index ) >>>> $a2: EventA( index == $index ) >>>> $a3: EventA( index == $index ) >>>> not EventB( this after[0ms] $a1 && before[0ms] $a3, index == $index ) >>>> then >>>> // ... match >>>> retract( $a1 ); >>>> retract( $a2 ); >>>> retract( $a3 ); >>>> end >>>> >>>> -W >>>> >>>> 2010/10/25 赵侃侃 <kevin223(a)gmail.com&gt; >>>>> >>>>> Hello, >>>>> I'm still quite new to the drools stuffs just getting the examples >>>>> running. I'm sorry if my question is too basic. >>>>> I have a system that will continuously to receive events sent from >>>>> some other system. Basically I have two types of events, eventA and eventB. >>>>> Both eventA and eventB have two properties, index and timestamp. >>>>> What I want is to capture a pattern to meet the following conditions >>>>> 1. every 3 consecutive eventsA without any eventB in between having a >>>>> same index value ordering by their timestamp. >>>>> 2. all events in a matched pattern will have the same value of >>>>> property index. >>>>> 3. if a pattern is matched, any of the events in this pattern should >>>>> not be used again for a new matching. >>>>> there are some examples below, the number after a colon stands for the >>>>> value of its index number and assume those events are already ordered by >>>>> their timestamp. >>>>> eventB:2 eventA:1 eventA:1 eventA:1 eventB:3 >>>>> --------- one successful match, we have three eventA with same index value >>>>> 1 in a row >>>>> eventB:2 eventA:1 eventA:1 eventB:1 eventA:1 >>>>> --------- no match because there's an eventB in between >>>>> eventB:2 eventA:1 eventA:1 eventB:2 eventA:1 >>>>> --------- one successful match because the in-between eventB has a >>>>> different index value >>>>> eventA:1 eventA:1 eventA:1 eventA:1 eventA:1 >>>>> --------- only one match, because once matched, the events can not be used >>>>> for a second match again. >>>>> >>>>> I just don't know how to write a rule like this. Is there anyone who >>>>> can shed some lights on? >>>>> Best Regards, >>>>> Kevin >>>>> >>>>> >>>>> _______________________________________________ >>>>> rules-users mailing list >>>>> rules-users(a)lists.jboss.org >>>>> https://lists.jboss.org/mailman/listinfo/rules-users >>>>> >>>> >>>> >>>> _______________________________________________ >>>> rules-users mailing list >>>> rules-users(a)lists.jboss.org >>>> https://lists.jboss.org/mailman/listinfo/rules-users >>>> >>> >>> >>> _______________________________________________ >>> rules-users mailing list >>> rules-users(a)lists.jboss.org >>> https://lists.jboss.org/mailman/listinfo/rules-users >>> >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users