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

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