[rules-users] What's wrong with this rule
Wolfgang Laun
wolfgang.laun at gmail.com
Fri Oct 29 02:26:57 EDT 2010
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 at gmail.com>
> 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 at gmail.com>
>
>> 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 at gmail.com>
>>
>>> 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 at gmail.com>写道：
>>>
>>> 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 at gmail.com>
>>>>
>>>>> 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 at gmail.com>
>>>>>
>>>>>> 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 at gmail.com>
>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> 2010/10/28 赵侃侃 <kevin223 at gmail.com>
>>>>>>>
>>>>>>>> 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 at gmail.com>
>>>>>>>>
>>>>>>>> Kindly state your requirements precisely.
>>>>>>>>>
>>>>>>>>> Perhaps
>>>>>>>>> not ( EventB ( index != $index,... )
>>>>>>>>> is what you need.
>>>>>>>>> -W
>>>>>>>>>
>>>>>>>>> 2010/10/28 赵侃侃 <kevin223 at gmail.com>
>>>>>>>>>
>>>>>>>>> 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 at gmail.com>
>>>>>>>>>>
>>>>>>>>>>> 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 at gmail.com>:
>>>>>>>>>>> > 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 at lists.jboss.org
>>>>>>>>>>> > https://lists.jboss.org/mailman/listinfo/rules-users
>>>>>>>>>>> >
>>>>>>>>>>> >
>>>>>>>>>>>
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>>>>>>>>>>
>>>>>>>>>>
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