2010/10/28 ΥΤΩ©Ω© <kevin223@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@gmail.com>

Kindly state your requirements precisely.

Perhaps
   not ( EventB ( index != $index,... )
is what you need.
-W

2010/10/28 ΥΤΩ©Ω© <kevin223@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@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 ΥΤΩ©Ω© <kevin223@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@lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>

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