[JBoss JIRA] Created: (JBRULES-2238) Accumulate should be implemented with left-input incremental so they don't start from scratch on every left-input retraction/assertion
by Geoffrey De Smet (JIRA)
Accumulate should be implemented with left-input incremental so they don't start from scratch on every left-input retraction/assertion
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Key: JBRULES-2238
URL: https://jira.jboss.org/jira/browse/JBRULES-2238
Project: Drools
Issue Type: Feature Request
Security Level: Public (Everyone can see)
Components: drools-core (expert)
Affects Versions: 5.0.1.FINAL
Reporter: Geoffrey De Smet
Assignee: Mark Proctor
The current accumulate implementation has a severe performance loss in the drools-solver context.
Edson said that this issue could be the culprit.
However, for this to be implemented the true modify feature should first be implemented.
See the discussion "Why is this DRL twice as slow?" on the dev user list.
>From IRC:
<ge0ffrey> more and more of my experiments show the poisones nature of accumulate for drools-solver. Probably because they are backwards chained (as I understand it?). Of course accummulate is great for many use cases, just not drools-solver.
<ge0ffrey> The problem is, I have no way to workaround them. I need the sum of my logically inserted objects.
<etirelli> ge0ffrey: no, accumulate are implemented as forward chain as usual
<etirelli> the problem is that a left-input retraction on an accumulate node will throw away any result and a leftinput assert will recalculate everything from scratch
<ge0ffrey> What do you mean by "must fully recalculate"?
<etirelli> mean from scratch
<ge0ffrey> Why does it do that?
<etirelli> remember that modify = retract+assert
<ge0ffrey> And right-input retractions won't recalculate everything from scratch?
<etirelli> no... right input are incremental
<ge0ffrey> would making leftinput assert incremental too be possible?
<etirelli> ge0ffrey: the only way to do left-input incremental is with a feature called "true modify"
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[JBoss JIRA] Created: (JBRULES-2336) Context assist in DSLR Editor
by Hamza Bakkali (JIRA)
Context assist in DSLR Editor
-----------------------------
Key: JBRULES-2336
URL: https://jira.jboss.org/jira/browse/JBRULES-2336
Project: Drools
Issue Type: Bug
Security Level: Public (Everyone can see)
Components: All
Affects Versions: 5.0.1.FINAL
Environment: Eclipse 3.4.2 GANYMEDE
Reporter: Hamza Bakkali
Assignee: Mark Proctor
Fix For: 4.0.8
I have been using drools 4 for couple of months now and I am starting to get the hang of it. We recently decided to move to Dools 5 with Eclipse 3.4.2 (Ganymede).
We unfortunately hit a major 'show stopper' (for us). In the DSLR editor: Context Assist + space + enter removes/replaces the whole line, not only the place holder.
In other words:
DSL:
[*][]Log : {msg}=System.out.println("{msg}");
[*][]id1="some id label"
DSLR:
rule "MyRule"
when
then
end
If I Press L , control space --> the line Log:{msg} appears in the context menu. Hit enter I get
Log :{msg}
Now, If want to replace msg by id1. I position the cursor in the {msg}, hit ctrl space, id1 shows in the list. I hit enter the whole line disappear, and I am left with
id1
instead of
Log : id1
Is this a setting somewhere in eclipse itself?? I doubt it.
The same thing use to work as expected in Drools 4.
thanks.
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[JBoss JIRA] Created: (JBRULES-1199) Add a field constraint negation operator to drools
by Arsalan Zaidi (JIRA)
Add a field constraint negation operator to drools
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Key: JBRULES-1199
URL: http://jira.jboss.com/jira/browse/JBRULES-1199
Project: JBoss Rules
Issue Type: Feature Request
Security Level: Public (Everyone can see)
Reporter: Arsalan Zaidi
Assigned To: Mark Proctor
Arsalan,
Unfortunately Drools does not have a field constraint negation operator, mostly because when writing rules, it was not needed, since you can always negate the constraint itself.
Although, I understand a agree with your use case. My suggestion is for you to open a JIRA feature request and we will include that as soon as possible in the product.
Although, meanwhile, the only workaround I can see for your case is to translate the expression you are using directly into a java or mvel expression and write it inside an in-line eval.
[]s
Edson
2007/9/14, Arsalan S. Zaidi <arsalan.zaidi(a)capgemini.com>:
Hi
I'll try to explain the situation that Gaurav finds himself in. We're working on this problem together and so far, we haven't been able to crack it.
We're using drools to handle the business rules for an application. The rules however, are not provided to us in a .drl file, rather, we get an XLS sheet from the analysts with rules in a different grammar.
We're using ANTLR to read and parse these rules to generate the drools rules programmatically. However, we're running into problems with NOT.
The input rules (in the non-drools business language) have a NOT operator which works like '!' in Java. It flips the Boolean around, so to speak. So:
NOT((some sub expression which evaluates to TRUE)) == FALSE
MVEL doesn't seem to support this. So how do we simulate it?
If it were only being used with NOT IN, we could manage, but its use is completely arbitrary. Changes to the input rules or to the input rules grammar have been (ha ha) ruled out.
Any help would be appreciated.
Regards,
_____________________________________________________
Arsalan Zaidi / Capgemini - India (FS SBU) / Mumbai
Technical Architect
Mobile Phone: +91 - 9892 8970 03 / www.capgemini.com
Together: the Collaborative Business Experience
_____________________________________________________
--------------------------------------------------------------------------------
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Anstis, Michael (M.)
Sent: 13 September 2007 13:31
To: Rules Users List
Subject: RE: [rules-users] How to use not operator in drool.
What dialect do your rules use?
You could also simplify the logic using DeMorgans Theorem (which might be troublesome to accomplish programmatically)
I don't know whether your example is flawed as the brackets don't match, but assuming you mean something like this:-
(NOT (G13.1 IN ("1","2","3") OR (G250.8 = Y)))
You can re-write this as
(G13.1NOT IN ("1","2","3") AND G250.8 != Y)
With kind regards,
Mike
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From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of JOSHI, GAURAV
Sent: 13 September 2007 08:20
To: Rules Users List
Subject: RE: [rules-users] How to use not operator in drool.
Thank's for your sugession of using "not in" instead of "not" but my problem is that "not" can also come without "in".
Actually I am making a generator of rule file from expression like
((NOT (ENDS WITH (G10.2, ",")))
((NOT (G13.1 IN ("1","2","3"))) OR (G250.8 = Y)))
Where G13.2, G250.8, G10.2 are variables coming from a map inserted in working memory.
I am accessing these variables from map.
My rules are as follows
This rule is working fine.
rule "Editable_G10.3"
when
((Map( this["G10.3"] !=8))||(Map( this["G10.2"] ==19)))
then
System.out.println("comming here----------------------------------------------------->");
End
This is not working
rule "Mandatory_G10.3"
when
(not((Map( this["G10.3"] !=8))||(Map( this["G10.2"] ==19))))
Then
System.out.println("comming here----------------------------------------------------->");
End
In also tried following approaches:
1) eval(not((Map( this["G10.3"] !=8))||(Map( this["G10.2"] ==19))))
2) eval(!((Map( this["G10.3"] !=8))||(Map( this["G10.2"] ==19))))
But in both cases it is giving same error:
org.drools.rule.InvalidRulePackage: Rule Compilation error : [Rule name=ValidationRuleExp_G10.3, agendaGroup=MAIN, salience=0, no-loop=false]
com/telekurs/nva/mde/fe/ak/validation/Rule_ValidationRuleExp_G10_3_0.java (11:495) : Cannot use this in a static context
com/telekurs/nva/mde/fe/ak/validation/Rule_ValidationRuleExp_G10_3_0.java (11:500) : Type mismatch: cannot convert from String to int
I am trying to find out some general concept so that I can change just achieve the functionality of not.
Thanks
Gaurav
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From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Edson Tirelli
Sent: Wednesday, September 12, 2007 10:20 PM
To: Rules Users List
Subject: Re: [rules-users] How to use not operator in drool.
Remove your "eval" and use "or" instead of "||" for the OR CE.
Although, I feel that this is not what you want... what you want is simply:
when
Map( this['city'] not in ( "mumbai", "delhi" ) )
then
//...
end
[]s
Edson
2007/9/12, Gaurav2007 < gaurav.a.joshi(a)capgemini.com>:
Hi ALL,
I am using drool4.0.1 in my application i am able to use IN,OR,AND operator
but i am facing problem in using not operator.
my requirement of not operator is just like a not gate.
the way i am using it is :
eval(not((Map( this["city"] !="mumbai"))||(Map( this["city"] =="delhi"))))
so can you please help me out to solve this problem:
should i use not operator or some thing else in drool.
Thanks,
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JBoss, a division of Red Hat @ www.jboss.com
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