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

[Wolfgang Laun]

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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