It's impossible to diagnose exactly what goes on without seeing the LHS patterns in detail. One possible reason for the rules rule[234] in groupX not firing the second time that group is given focus is that none of the objects participating in the LHS of the three rules has changed since the first time.

Mixing condition evaluation by pattern matching with explicit control via a-groups and the like is tricky and apt to create surprises galore. Try to write the LHS so that they fully express the condition for firing; use groups only as a last resort.

Hint: duplication of RHS code can be avoided by defining and calling functions.

-W


On Wed, Jun 24, 2009 at 4:42 AM, new2drools <rkbeach@gmail.com> wrote:

Hi All,

Need some help with understanding setFocus.

I have the following use case:

if (condition1) {

 if (condition2) {

 } else if (condition3) {

 } else if (condition 4) {

 }

}

if (condition5) {

 if (condition2) {

 } else if (condition3) {

 } else if (condition 4) {

 }

}

I created 3 rules (rule2, rule3, rule4) for checking condition2, condition3,
condition4 and
created 1 agenda group (groupX) for them.

I created 2 rules (rule1, rule5) for checking condition1, condition5 and
created 1 agenda group(groupY) for them.

rule "rule1"
 agenda-group "groupY"

 when
   //
 then
  drools.setFocus("groupX");
end

rule "rule3"
 agenda-group "groupX"
 activation-group "someActiveGroup"

 when
   //
 then
  //
end

>From the java code:

ksession.getAgenda().getAgendaGroup("groupY").setFocus();

Problem: The first time, drools.setFocus("groupX") is invoked, I see that
it's working fine. rule2 or rule3 or rule4 get triggered. But, the SECOND
time that drools.setFocus("groupX") is invoked, I don't see that any rule in
agenda-group groupX is being invoked...even though one of the rule's LHS
explicitly matches...thinking that the activation-group is cancelling all
the activation's (after one rule in that activation group is fired), I even
removed the activation-group statement. But, it didn't help...ideally, I
would like to bunch rule2, rule3, rule4 in one activation group.

Can you please let me know as to why the second invocation of setFocus is
not working? I even tried to remove everything in LHS of rule2/3/4, to see
if the second invocation would work...it doesn't...

Thanks!!
--
View this message in context: http://www.nabble.com/Need-help-with-setFocus-tp24177742p24177742.html
Sent from the drools - user mailing list archive at Nabble.com.

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