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

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