Re: [rules-users] What's wrong with this rule

Absence of events can only be detected by checking the past. This means that a trigger must be inserted whenever it's time to check the last two minutes. This check cannot be done in a uniform way for all players because the arrival of an EventB is the start of another 2 minute interval. The solution is based on a ticker which inserts the trigger (Checker) whenever 120 seconds have gone by. (There are also other techniques to do this.) declare EventB @role( event ) end declare Checker @role( event ) end rule "ticker 120" no-loop true timer(int:0s 1s) when $p: Player( $index: index, $ticks: ticks ) then if( $ticks == 120 ){ modify( $p ){ setTicks( 1 ) } insert( new Checker( $index ) ); } else { modify( $p ){ setTicks( $ticks + 1 ) } } end rule "no B for 2 minutes" when $c : Checker( $index: index ) not EventB( index == $index, this before[0s,2m] $c ) then System.out.println( "at " + Main.getClock() + ": no B:" + $index + " in last 2 minutes" ); retract( $c ); end rule "B arrives" when $p : Player( $index: index ) $b : EventB( index == $index ) then System.out.println( "at " + Main.getClock() + ": B:" + $index + ", reset ticks" ); modify( $p ){ setTicks( 0 ) } retract( $b ); end 2010/10/31 赵侃侃 <kevin223(a)gmail.com&gt; this.session = createSession(); > SessionPseudoClock clock = session.getSessionClock(); > session.insert( new Player( 1 ) ); > session.insert( new Player( 2 ) ); > > clock.advanceTime( 3*60, TimeUnit.SECONDS ); > session.insert(new EventB(1)); > session.fireAllRules(); > > clock.advanceTime( 3*60, TimeUnit.SECONDS ); > session.fireAllRules(); > > session.dispose(); > > The above code gives the following output: > > no B:2 in last 2 minutes > no B:1 in last 2 minutes > > what I expect is: > > no B:2 in last 2 minutes > no B:2 in last 2 minutes > no B:1 in last 2 minutes > > Any ideas? > > Best Regards, > Kevin Zhao > > 2010/10/29 Wolfgang Laun <wolfgang.laun(a)gmail.com&gt; > >> System.out.println( "Test no B" ); >> session = kBase.newStatefulKnowledgeSession( config, null ); >> clock = session.getSessionClock(); >> session.insert( new Player( 1 ) ); >> clock.advanceTime( 3*60, TimeUnit.SECONDS ); >> session.fireAllRules(); >> session.dispose(); >> >> The rule fires with this test, (kBase in STREAM mode). >> -W >> >> 2010/10/29 赵侃侃 <kevin223(a)gmail.com&gt; >> >> The "no B:x for 2 minutes" will not fire if nothing comes in even after >>> 2minutes. e.g. if no characters get killed then no events will come in. >>> If I add a timer to this rule, say like timer (2m 1s), then the rule >>> will fire every second after 2 minutes. >>> >>> Best Regards, >>> Kevin >>> >>> 2010/10/29 Wolfgang Laun <wolfgang.laun(a)gmail.com&gt; >>> >>>> OK; your original version somehow put me off the right track. >>>> This rule will fire as soon as there is no B:n according to the >>>> Player index for 2 minutes. >>>> >>>> rule "no B:x for 2 minutes" >>>> when >>>> $b : Player( $index: index ) >>>> not ( EventB( index == $index) over window:time( 2m ) ) >>>> then >>>> System.out.println( "no B:" + $index + " in last 2 minutes" ); >>>> end >>>> >>>> This would fire whenever there's no B at all for 2 minutes: >>>> >>>> rule "no B for 2 minutes" >>>> when >>>> not ( EventB() over window:time( 2m ) ) >>>> then >>>> System.out.println( "no B:" + $index + " in last 2 minutes" ); >>>> end >>>> >>>> >>>> >>>> 2010/10/28 赵侃侃 <kevin223(a)gmail.com&gt; >>>> >>>>> My last mail should actually read: >>>>> >>>>> A player may have multiple characters and the rule should fire when * >>>>> ALL* of its characters live longer than 2 minutes. that's why >>>>> "characters" do not have a unique identification and there isn't any event >>>>> representing a character birth. >>>>> >>>>> Best Regards, >>>>> Kevin Zhao >>>>> >>>>> 在 2010年10月28日 下午9:50，赵侃侃 <kevin223(a)gmail.xn--com&gt;:-0s6m5392c >>>>> >>>>> A player may have multiple characters and the rule should fire when >>>>>> any of its characters live longer than 2 minutes. that's why "characters" >>>>>> do not have a unique identification and there isn't any event representing >>>>>> a character birth. >>>>>> >>>>>> Best Regards, >>>>>> Kevin Zhao >>>>>> >>>>>> 2010/10/28 Wolfgang Laun <wolfgang.laun(a)gmail.com&gt; >>>>>> >>>>>>> If EventB( index == 3 ) signifies that the "character" owned by >>>>>>> player 3 has been killed: what is the event that this character has been >>>>>>> born? Life is the time between birth and death; these two are well-defined >>>>>>> (well, mostly) events, and they ought to be represented by clean-cut events >>>>>>> in any application. Then it's no problem to write rules firing when a >>>>>>> "character" lives longer or shorter than any time. Also, "characters" may >>>>>>> have to have a unique identification beyond their player-owner. >>>>>>> >>>>>>> If you are constantly shifting your specs, we won't be getting any >>>>>>> closer to a solution, though. >>>>>>> >>>>>>> >>>>>>> -W >>>>>>> >>>>>>> >>>>>>> 2010/10/28 赵侃侃 <kevin223(a)gmail.com&gt; >>>>>>> >>>>>>>> To be honest, I don't quite understand the rules you wrote. Let me >>>>>>>> explain this a little bit with a real world scenario. >>>>>>>> Assume this is an on-line game that EventB indicates a 'kill' event >>>>>>>> that a player is losing its character who might be killed by some other >>>>>>>> player. >>>>>>>> The property index points to the player who owns this character. >>>>>>>> What I'm looking for here is to find out when a player's character survives >>>>>>>> in 2 minutes. The number of players in a game is at least 2 but can be up to >>>>>>>> any number. >>>>>>>> >>>>>>>> Best Regards, >>>>>>>> Kevin Zhao >>>>>>>> >>>>>>>> 2010/10/28 Wolfgang Laun <wolfgang.laun(a)gmail.com&gt; >>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> 2010/10/28 赵侃侃 <kevin223(a)gmail.com&gt; >>>>>>>>> >>>>>>>>>> Hello Wolfgang, >>>>>>>>>> >>>>>>>>>> Index is just like the index in an array. the value can be any >>>>>>>>>> from 0 to the array length. >>>>>>>>>> for the previous example, the length is 1 so index can be either >>>>>>>>>> 0 or 1. but in the real case, the length can be an arbitrary number. >>>>>>>>>> >>>>>>>>>> another question, there are 2 rules here, do both of them have to >>>>>>>>>> be applied? >>>>>>>>>> >>>>>>>>> >>>>>>>>> One creates and inserts the PatternConsumer which blocks repeated >>>>>>>>> usage of the pair of EventB facts that have been successfully paired. >>>>>>>>> Otherwise a sequence EventB:0, EventB:1, EventB:2 would fire 2 times. >>>>>>>>> >>>>>>>>> If the positive condition is more complex, e.g., you need *all* >>>>>>>>> index values 0,...,L-1 within 2m, then other conditions will be required >>>>>>>>> (and that's what I meant with "more precisesly"). If any pair a,b from >>>>>>>>> [0..L-1] will do, then the modified version (!=) should be OK. >>>>>>>>> >>>>>>>>> -W >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>>> >>>>>>>>>> Best Regards, >>>>>>>>>> Kevin Zhao >>>>>>>>>> >>>>>>>>>> 2010/10/28 Wolfgang Laun <wolfgang.laun(a)gmail.com&gt; >>>>>>>>>> >>>>>>>>>> Kindly state your requirements precisely. >>>>>>>>>>> >>>>>>>>>>> Perhaps >>>>>>>>>>> not ( EventB ( index != $index,... ) >>>>>>>>>>> is what you need. >>>>>>>>>>> -W >>>>>>>>>>> >>>>>>>>>>> 2010/10/28 赵侃侃 <kevin223(a)gmail.com&gt; >>>>>>>>>>> >>>>>>>>>>> I haven't tested this rule, but what about the case that >>>>>>>>>>>> property index would have arbitrary number of possible values? >>>>>>>>>>>> >>>>>>>>>>>> 2010/10/27 Wolfgang Laun <wolfgang.laun(a)gmail.com&gt; >>>>>>>>>>>> >>>>>>>>>>>>> Omitting the Entry Points: >>>>>>>>>>>>> >>>>>>>>>>>>> rule "B-0-1-not OK" >>>>>>>>>>>>> when >>>>>>>>>>>>> $b : EventB( $index: index ) >>>>>>>>>>>>> not ( PatternConsumer( id == "B01", events contains $b ) ) >>>>>>>>>>>>> not ( EventB( index == (1 - $index), this after[0s,2m] $b ) >>>>>>>>>>>>> ) >>>>>>>>>>>>> then >>>>>>>>>>>>> System.out.println( "B:" + $index + ", but no B:" + >>>>>>>>>>>>> (1-$index) ); >>>>>>>>>>>>> end >>>>>>>>>>>>> >>>>>>>>>>>>> rule "B-0-1" >>>>>>>>>>>>> when >>>>>>>>>>>>> $b1 : EventB( $index: index ) >>>>>>>>>>>>> $b2 : EventB( index == (1 - $index), this after[0s,2m] $b1 >>>>>>>>>>>>> ) >>>>>>>>>>>>> then >>>>>>>>>>>>> insert( new PatternConsumer( "B01", $b1, $b2 ) ); >>>>>>>>>>>>> System.out.println( "B:" + $index + "+B:" + (1-$index) ); >>>>>>>>>>>>> end >>>>>>>>>>>>> >>>>>>>>>>>>> -W >>>>>>>>>>>>> >>>>>>>>>>>>> 2010/10/27 赵侃侃 <kevin223(a)gmail.com&gt;: >>>>>>>>>>>>> > Hello, >>>>>>>>>>>>> > With the help from the community I managed to get my first >>>>>>>>>>>>> rule working, and >>>>>>>>>>>>> > I'm trying to write my second rule on my own but it just >>>>>>>>>>>>> doesn't seem to >>>>>>>>>>>>> > work correctly. >>>>>>>>>>>>> > Here is the scenario, what I want is to identify a pattern >>>>>>>>>>>>> that there's no >>>>>>>>>>>>> > EventB coming in within 2 minutes with a particular index >>>>>>>>>>>>> value. >>>>>>>>>>>>> > For example, EventB would have a property named index and >>>>>>>>>>>>> assume the value >>>>>>>>>>>>> > of index would be either 0 or 1. >>>>>>>>>>>>> > Before firing the rules, I would manually insert facts of >>>>>>>>>>>>> possibleIndex with >>>>>>>>>>>>> > value 0 and 1 into the workingMemory. >>>>>>>>>>>>> > Within 2 minutes, if there only comes one EventB with index >>>>>>>>>>>>> valued 0 then >>>>>>>>>>>>> > the system should report no EventB coming in with index >>>>>>>>>>>>> value 1 in last 2 >>>>>>>>>>>>> > minutes. >>>>>>>>>>>>> > Vice versa, in the case of only coming one EventB with index >>>>>>>>>>>>> valued 1 then >>>>>>>>>>>>> > the system should report no EventB coming in with index >>>>>>>>>>>>> value 0 in last 2 >>>>>>>>>>>>> > minutes. >>>>>>>>>>>>> > If within 2 minutes, there comes 2 EventB with both value 0 >>>>>>>>>>>>> and 1 then >>>>>>>>>>>>> > nothing should report. >>>>>>>>>>>>> > Here is what I wrote, but it doesn't seem to work correctly. >>>>>>>>>>>>> > I used a timer to fire this rule every 10 seconds because I >>>>>>>>>>>>> don't think the >>>>>>>>>>>>> > rule would run automatically if I don't add that. (not too >>>>>>>>>>>>> sure though) >>>>>>>>>>>>> > rule "no B in 2 minutes" >>>>>>>>>>>>> > timer (0 10s) >>>>>>>>>>>>> > when >>>>>>>>>>>>> > possibleIndex( $index : index ) from entry-point "Event >>>>>>>>>>>>> stream" >>>>>>>>>>>>> > $p : PatternConsumer ( name == 'no B' && index == $index ) >>>>>>>>>>>>> > not ( EventB( index == $index && this after[0ms,2m] $p) over >>>>>>>>>>>>> window:time(2m) >>>>>>>>>>>>> > from entry-point "Event stream" ) >>>>>>>>>>>>> > then >>>>>>>>>>>>> > PatternConsumer pc = new PatternConsumer( "no B", $index ); >>>>>>>>>>>>> > insert(pc); >>>>>>>>>>>>> > System.out.println("no B in 2 minutes " + $index); >>>>>>>>>>>>> > end >>>>>>>>>>>>> > Best Regards, >>>>>>>>>>>>> > Kevin Zhao >>>>>>>>>>>>> > _______________________________________________ >>>>>>>>>>>>> > 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 >>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>>> _______________________________________________ >>>>>>>> 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 >> >> > > _______________________________________________ > 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