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

[赵侃侃]

Hello Wolfgang,

I tried your rules but they don't seem to work correctly. Nothing comes back
thus the consequences are not executed.
I think we need to introduce a timer to trigger the rule once a while
because if there nothing comes in (e.g. no one get killed) then nothing will
get executed.

Best Regards,
Kevin Zhao

在 2010年10月28日 下午4:57，赵侃侃 <kevin223 at gmail.com>写道：

> 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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>>>>>
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