from:"FrankVhh"

Hi,

It depends upon which version of drools you are using, but if it is a
version pre 5.2.0, than your last line should be:

eval($c.getDoMin()=$m.getDoMin())

If you are using 5.2.0, the parser allow a bit more freedom, allthough I am
not sure about this very case. You surely will have to omit the ; at the end
of your condition.

Regards,
Frank


michou89 wrote:
 
 rule ValidMechanism
   when
   $c : Capacity(doMin20)
   $m : Mechanism(DMOMax=30, doMax50  doMin40  maxPower180 
 
 minPower=100  bidPower100  200)
   $c.getDoMin()=$m.getDoMin();
   then
   System.out.println(Capacity n°+$c.getIdCapacity()+ eligible 
 to the
 mechanism n°+$m.getIdMechanism()+ for rule 1 );
 end
 
 
 My error : org.drools.rule.InvalidRulePackage: [40,15]: unknown:40:15
 mismatched token: [@100,813:814='=',78,40:15]; expecting type THEN
 (this is the last line before the then)
 
 
 I don't understand why I can't compare 2 values.
 


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[rules-users] Serializing knowledgepackages - execution behaviour

Hi all,

After playing with serializing knowledgepackages a bit, I stumbled upon some
behaviour which I cannot explain at the moment. I can only hope someone can
deliver a hint of insight into this.

The situation:
Creating and executing a rule engine with the very same rules. In the first
attempt, rules are serialized first. Note that only the rules are
serialized, not the engine. 
In the second attempt, the normal (= as in the hello world sample)
procedure is used to feed the rules to the engine. 

I noticed some performance differences at execution time, which amaze me a
bit, as I can't see a reason why execution would differ...

When loading the serialized rules, rule execution is slightly slower and,
more important, there are some glitches in the performance (execution times
over 10 times slower than average execution). Unserialized rules run much
smoother and much more consistent.

Does anyone have any explanation for this? I am very interested to find out.

Thanks a lot.

Regards,
Frank

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Re: [rules-users] RuleSet (RuleFlowGroup)

Hi,

The thing you explain is actually the expected behaviour. If the process
encounters a rule task, it will examine all rules inside the ruleflowgroup
in question. Rule execution continues until no more matching conditions are
found. From then on, the process continues to the next task.

If you would like to stop the process based on some business rules, you will
have to guide it towards a terminate node or kill it by calling the API.
Guiding towards a terminate node can be done with the help of decision
gateways and (rule) outcomes. The code to kill it via the API can be found
in the documentation.

Regards,
Frank



rchemisa wrote:
 
 Hello,
 
 I'm trying tp understand how does the Rule Set works and I'm experiencing
 some problems. I need it to stop
 when the process finds a 'rule set' and it doesn't match with the
 conditions, however, the process continues even the facts do not fulfill
 the conditions.
 
 Can someone explain me how does the 'rule set' works or can u give an
 example?
 
 thank you very much
 


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Re: [rules-users] RuleSet (RuleFlowGroup)

A rule engine will reason upon all the facts that are in its working memory,
no matter what facts are in there. Therefore, it can not natively know
whether it has enough facts, neither does it (natively) know which facts
are missing. Call fire all rules, the engines starts thinking and will stop
thinking from the moment there are no more rules that are matching. Whether
the results make sense or not... well, it actually doesn't care.

In theory, you should provide all necessary facts before calling the rule
engine. I.e. add a task/step before calling the engine to collect all
missing facts.

In practice, you are able to hack the philosophy, as the THEN part of a
rule is pure JAVA code, you can pretty much do what you want and add a
rule/rules that go after the required inputs (WHEN not veryImportantObject()
THEN getMyVeryImportantObject();END 

Does this make sense to you?

Regards,
Frank



rchemisa wrote:
 
 Ty so much for answering FrankVhh,
 
 I dont understand if you can stop the process (just wait) in the Rule Set
 waiting to be inserted in the session some fact that makes the rules
 associated conditions are met (the result of the conditions true)
 
 So, the Rule Set act as a Wait State but may outsource the rules in the
 drl.
 
 Regards
 


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Re: [rules-users] Can I solve the 'Zebra Puzzle' in drools?

2011-06-15 Thread FrankVhh

Hi,

This is a puzzling one... but then again, I believe that is the idea.

I should have a very close look at it, but a loop always suggests that there
are rules that re-activate themselves or eachother.

For example:

rule 抽kools牌的香烟的人与养马的人是邻居
when
$h1:House(cigarette == Cigarette.kools)
$h2:House(pet == Pet.horse)
$h3:House(eval(position - $h2.position == 1) || eval(position -
$h2.position == -1))
eval($h1.position - $h2.position != 1  $h1.position - $h2.position
!= -1)
then
System.out.println(抽kools牌的香烟的人与养马（horse）的人是邻居);
modify($h1){setCigarette($h3.cigarette)};
modify($h3){setCigarette(Cigarette.kools)};
end

In this rule, $h3 and $h1 might be the same house OR $h1 and $h2 might be
the same house. I think you need to add extra constraints to make sure that
all 3 houses are different.

But still, I haven't had a thorough look at all the rules neither did I
refresh my knowledge of the zebrapuzzle, so I am not sure whether this is a
complete answer (if any).

Please let us know.

Regards,
Frank


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Re: [rules-users] Can I solve the 'Zebra Puzzle' in drools?

2011-06-15 Thread FrankVhh

Hi,

Just a last quick reply before getting stuck in a traffic jam.

As said, I haven't had a real good look at the rules, but imo they might be
able to work when you feed the engine an initial solution. I.e. insert five
house objects into working memory with a random assignment of the
attributes. The engine could then re-arrange the objects until all
constraints are satisfied.

But again, I am not really certain about these statements, but it is an
interesting topic to think about...

Regards,
Frank 



Wolfgang Laun-2 wrote:
 
 This puzzle can be solved using forward chaining, i.e., by using Drools or
 any similar RBS, but it isn't possible by implementing the givens as
 rules,
 expecting that an increase in the filled-in values will result in a (the)
 solution. Certainly, it is possible to write a rule such as
 
 rule EnglishRed
 when
 $h: House( nationality == null  colour == Colour.RED ||
nationality == Nationality.ENGLISHMAN  colour == null )
 then
 modify( $h ){
 setNationality( Nationality.ENGLISHMAN ),
 setColour( Colour.RED )
 }
 end
 
 which adds red or Englishman to a House as soon as the other property
 is
 present. But this approach comes to a standstill as soon as more
 sophisticated mental processes are required in the manual solution
 technique.
 
 One approach I've tried successfully is to generate all permutations of
 animals, colours, drinks, nationalities and smokes (120 each), insert them
 as facts, and to write one big rule according to the givens. A similar
 approach uses facts consisting of an attribute indication (animal,...
 smoke), a value and a reference to a House, again starting with all
 possible
 associations and using one rule to select the attribute combinations
 satisfying the givens.
 
 I'm not quite sure how the rules presented by Miles should work, but I
 don't
 think that swapping values between House facts is going to work, even when
 more defensive strategies against looping are employed.
 
 -W
 
 
 
 
 
 
 
 On 15 June 2011 14:47, FrankVhh lt;frank.vanhoensho...@agserv.eugt;
 wrote:
 
 Hi,

 This is a puzzling one... but then again, I believe that is the idea.

 I should have a very close look at it, but a loop always suggests that
 there
 are rules that re-activate themselves or eachother.

 For example:

 rule 抽kools牌的香烟的人与养马的人是邻居
when
$h1:House(cigarette == Cigarette.kools)
$h2:House(pet == Pet.horse)
$h3:House(eval(position - $h2.position == 1) || eval(position -
 $h2.position == -1))
eval($h1.position - $h2.position != 1  $h1.position -
 $h2.position
 != -1)
then
System.out.println(抽kools牌的香烟的人与养马（horse）的人是邻居);
modify($h1){setCigarette($h3.cigarette)};
modify($h3){setCigarette(Cigarette.kools)};
 end

 In this rule, $h3 and $h1 might be the same house OR $h1 and $h2 might be
 the same house. I think you need to add extra constraints to make sure
 that
 all 3 houses are different.

 But still, I haven't had a thorough look at all the rules neither did I
 refresh my knowledge of the zebrapuzzle, so I am not sure whether this is
 a
 complete answer (if any).

 Please let us know.

 Regards,
 Frank


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Re: [rules-users] Smart Templates

2011-06-01 Thread FrankVhh

Hi,

Basically, you have 2 options.

1) You call the function getType() from your .drl file. The function will be
executed at runtime.

header
name
value

TEMPLATE
WHEN
blabla
THEN
$type.setName($service.getType(@{value}));

2) Execute the function before you compile your rules with Rule Templates.
I.e. make sure your objects have an attribute whose value will be set by
getType() and use this value in the Template.

header
name
value
type

TEMPLATE
WHEN
blabla
THEN
$type.setName(@{type});

Hope this helps.

Btw, am I understanding it correctly that you do not want to use a Decision
Table because you are worried about manageability of your ruleset? And, in
stead, you want to create rules directly from Java objects, using templates.
If this is correct, could you tell me how you are going to manage these
objects?

Regards,
Frank



ChrisMu wrote:
 
 Sorry - you're losing me - could you give an example please?
 
 Thanks
 
 
 
 From: Wolfgang Laun-2 [via Drools]
 [mailto:ml-node+3010989-1781642469-404...@n3.nabble.com] 
 Sent: 01 June 2011 15:25
 To: Mullard, Christopher
 Subject: Re: [rules-users] Smart Templates
 
 
 It's just like a Java static method. Call JAva code if you don't want to
 put it all into DRL function, or import from Java in the first place. Both
 import and function can be used in spreadsheets.
 -W
 
 
 
 2011/6/1 ChrisMu [hidden email]
 
 
   Agreed, but this was just an example - if the function required 
 something
 more complicated - say a DB lookup, could it be done?
 
 
 
   From: Wolfgang Laun-2 [via Drools] [mailto:[hidden email]
 lt;http://user/SendEmail.jtp?type=nodeamp;node=3010490amp;i=0gt; ] 
   Sent: 01 June 2011 12:40
   To: Mullard, Christopher
   Subject: Re: [rules-users] Smart Templates
   
   
   If there are just 2 types (IRDELTA, COMLEASEDELTA) you can add a 
 function
 that computes this from the 3-letter name.
   -W
   
   
   
   2011/6/1 ChrisMu [hidden email]
 lt;http://user/SendEmail.jtp?type=nodeamp;node=3010275amp;i=0gt; 
   
 
   Possibly. Let me try again with what I'm trying to achieve.
   Given this excerpt from a decision table:

   

   Basically I want to be able to specify a template that says 'If 
 Arg0 is
 a currency, output RiskType IRDELTA (and currency), if Arg0 is a commodity
 (begins with 'X') then output RiskType COMLEASEDELTA (and commodity).

   When fed with data, this would generate the rules:

   when Arg0 = USD, output RiskType IRDELTA, USD
   when Arg0 = GBP, output RiskType IRDELTA, GBP
   etc
   when Arg0 = XAU, output RiskType COMLEASEDELTA, XAU
   etc

   In this way theRiskType name is inferred from the data when the 
 rules
 are generated. It can be done by explicitly stating all possible
 combinations as in the decision table above but that gets tedious quickly.
 I wanted to have a more general template that could generate all the
 specific rules instances.

   Does that make more sense?

   Thanks
   Chris

 
 
 
   From: Wolfgang Laun-2 [via Drools] [mailto:[hidden email]
 lt;http://user/SendEmail.jtp?type=nodeamp;node=3010119amp;i=0gt; ] 
   Sent: 01 June 2011 11:21
   To: Mullard, Christopher
   Subject: Re: [rules-users] Smart Templates
   
   
   I don't want to confuse you, but have you considered not using 
 templates
 at all? If you can generate N rules from N objects containing different
 literals for matching a fact or for updating a fact field, then you can
 achieve the same thing with a single rule and additional facts containing
 those literal values.
   
   rule one 4 all
   when
   Â Â  Service( $name: name, $value: value )
   Â Â  $sb: ServiceBean( name == $name, value == $value )
   then
   Â Â  # RiskType ... is what?
   Â Â  ...$value..., ...$sb.getType()... 
   end
   
   -W
   
   
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   If you reply to this email, your message will be added to the 
 discussion
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Re: [rules-users] Smart Templates

2011-06-01 Thread FrankVhh

Load the data from a DB and instantiate Java objects with that. Then generate
the rule set using a template.
= OK, in this case, I would call the function getType() during the
instantiation of the java objects.

On the manageability topic: I have no knowledge of your data model, but I
can indeed imagine cases where a decision table would be less manageable
than a database.

Regards,
Frank


ChrisMu wrote:
 
 Ideally:
 Load the data from a DB and instantiate Java objects with that. Then
 generate the rule set using a template.
  
 The DB data would provide the list of permitted values per field. 
 The rule results are generated based on the inputs.
  
 This avoids users having to enter one rule for every single currency and
 commodity type (using the example below) when there are only 2 underlying
 'rules'.
 If another currency is then added to the data in the DB, the new rule will
 be automatically generated.
 
 
 
 From: FrankVhh [via Drools]
 [mailto:ml-node+3011148-1318721408-404...@n3.nabble.com] 
 Sent: 01 June 2011 15:57
 To: Mullard, Christopher
 Subject: RE: [rules-users] Smart Templates
 
 
 Hi, 
 
 Basically, you have 2 options. 
 
 1) You call the function getType() from your .drl file. The function will
 be executed at runtime. 
 
 header 
 name 
 value 
 
 TEMPLATE 
 WHEN 
 blabla 
 THEN 
 $type.setName($service.getType(@{value})); 
 
 2) Execute the function before you compile your rules with Rule Templates.
 I.e. make sure your objects have an attribute whose value will be set by
 getType() and use this value in the Template. 
 
 header 
 name 
 value 
 type 
 
 TEMPLATE 
 WHEN 
 blabla 
 THEN 
 $type.setName(@{type}); 
 
 Hope this helps. 
 
 Btw, am I understanding it correctly that you do not want to use a
 Decision Table because you are worried about manageability of your
 ruleset? And, in stead, you want to create rules directly from Java
 objects, using templates. If this is correct, could you tell me how you
 are going to manage these objects? 
 
 Regards, 
 Frank 
 
 
 
 
   ChrisMu wrote:
   Sorry - you're losing me - could you give an example please? 
   
   Thanks 
   
    
   
   From: Wolfgang Laun-2 [via Drools] [mailto:[hidden email]] 
   Sent: 01 June 2011 15:25 
   To: Mullard, Christopher 
   Subject: Re: [rules-users] Smart Templates 
   
   
   It's just like a Java static method. Call JAva code if you don't want to
 put it all into DRL function, or import from Java in the first place. Both
 import and function can be used in spreadsheets. 
   -W 
   
   
   
   2011/6/1 ChrisMu [hidden email] 
   
   
   Agreed, but this was just an example - if the function required
 something more complicated - say a DB lookup, could it be done? 
   
    
   
   From: Wolfgang Laun-2 [via Drools] [mailto:[hidden email]
 lt;http://user/SendEmail.jtp?type=nodeamp;node=3010490amp;i=0gt; ] 
   Sent: 01 June 2011 12:40 
   To: Mullard, Christopher 
   Subject: Re: [rules-users] Smart Templates 
   
   
   If there are just 2 types (IRDELTA, COMLEASEDELTA) you can add a
 function that computes this from the 3-letter name. 
   -W 
   
   
   
   2011/6/1 ChrisMu [hidden email]
 lt;http://user/SendEmail.jtp?type=nodeamp;node=3010275amp;i=0gt;  
   
   
   Possibly. Let me try again with what I'm trying to
 achieve. 
   Given this excerpt from a decision table: 
 
   
 
   Basically I want to be able to specify a template that
 says 'If Arg0 is a currency, output RiskType IRDELTA (and currency), if
 Arg0 is a commodity (begins with 'X') then output RiskType COMLEASEDELTA
 (and commodity). 
 
   When fed with data, this would generate the rules: 
 
   when Arg0 = USD, output RiskType IRDELTA, USD 
   when Arg0 = GBP, output RiskType IRDELTA, GBP 
   etc 
   when Arg0 = XAU, output RiskType COMLEASEDELTA, XAU 
   etc 
 
   In this way theRiskType name is inferred from the data
 when the rules are generated. It can be done by explicitly stating all
 possible combinations as in the decision table above but that gets tedious
 quickly. I wanted to have a more general template that could generate all
 the specific rules instances. 
 
   Does that make more sense? 
 
   Thanks 
   Chris

Re: [rules-users] Smart Templates

2011-05-31 Thread FrankVhh

Hi,

The way I see it, this is the way your template should look like. I do not
see the need to use eval() at all.

rule DC_0
when 
$service: Service(name == @{service}, value == @{value})
$riskType: RiskType()
then 
$riskType.setName($service.getType(@{value}));
$riskType.setAtt(0,@{value});
end

I am assuming that RiskType is already inserted in WM, but you could just as
well create a new object in the then-part of the rule.

In stead of using the java-function to determine the name, you might
actually just as well create an other rule that sets the name according to
the value, thus putting the entire decision logic in rules.

Hope this helps.

Regards,
Frank


ChrisMu wrote:
 
 Hi,
 
  I'm trying to get a template (.drt) to generate 2 rules (.drl) from 2
 datasets but by doing a little bit more work than direct substitution.
 
 Data (service,value):
 DC, AAA
 DC, XYZ
 
 Idea for the template - if value is of type1 then create Type object with
 'Type1' as name. If value is of type2, use 'Type2' as name:
 
 rule DC_@{row.rowNumber}
 when 
 Service(name == DC)
 then 
 Type.setName(eval(Service.getType(@{value})))
 Type.setAtt(0,@{value})
 end template
 
 eval(Service.getType(@{arg0})) should take 'AAA' or 'XYZ' etc as arg and
 return a string Type1/Type2 etc.
 
 This would then generate 2 rules that look like:
 
 rule DC_0
 when 
 Service(name == DC, value == AAA)
 then 
 RiskType.setName(Type1)
 RiskType.setAtt(0,AAA)
 
 rule DC_1
 when 
 Service(name == DC, value == XYZ)
 then 
 RiskType.setName(Type2)
 RiskType.setAtt(0,XYZ)
 
 ...is this possible at all? I'm trying to avoid the eval step being done
 in the actual rule (.drl) .
 
 Thanks
 
 Chris
 


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Re: [rules-users] How to convert and use JAVA drools 5.1 in .net

2011-05-31 Thread FrankVhh

Hi,

I remember implementing Drools in .net, using IKVM, but I am not able to
retrieve the code (nor retrieve my memory) at the moment.

When I read my short explanation of the way I implemented it, I am not
convinced that I used IKVM to convert any native drools libraries. In stead,
it appears as if only my original Java-implementation is converted (with all
desired functions present).

At least, that would explain why you would be able to disregard all warnings
(as Drools engine still runs in java).

If you would like to use an Object from the Drools-jars, then you probably
cannot disregard the warnings when converting the jars. However, I have
never tried to fully achieve this.

Imo, there are a number of ways forward from here (choose as you prefer)
1) Try to ikvmc the entire drools library, carefully adding all dependancies
and fixing wrong convertions
2) Try to contact an other member of this community: Corneil (du Plessis?),
who achieved a drools implementation with IKVM. I am not sure to what extent
he converted all the jars.
3) Try using jni4net

Regards,
Frank

rahultechie wrote:

Hi,

I am trying to access JAVA drools 5.1 in .net. To convert binary files of
JAVA drools 5.1 in .net, I use ikvm-0.46.0.1 tool.

I referred these dlls in my .net application and tried to write JAVA code
(referring to
http://techgrafitti.wordpress.com/2011/02/21/drools-%E2%80%93-getting-started-hello-world-example/
link ) in my .net application.

But not able to refer StatefulSession class from
org.drools.StatefulSession namespace. Actually not able to find
org.drools.StatefulSession namespace from drools-core-5.1.1.dll.

While converting jar to dlls I got lots of warning, after Googling I found
that we have to neglect these warnings.

Have any body already wrote such code?
Please share the dlls if you are able to run the rules in .net using
latest drools 5.1.
If possible please share me the code (if your code is not similar to the
code referred in above link).

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Re: [rules-users] Smart Templates

2011-05-31 Thread FrankVhh

But then that would call the service.getType() method when the rule is
run wouldn't it?
- Yes
 
I'm trying create explicit, simple rules to avoid doing extra work when
running data through them.
- OK, in essence, I like that :-)
 
How would you use a rule to set the value within another rule?
- I am not sure that I follow you here...
If you want to avoid to execute the getType()-service at rule execution,
then you would need to add an attribute name to your object, and call
getType() before creating the rules.

Alternatively, you can insert an intermediate value whose value will be set
by another rule and then use this intermediate value in your DC rules.

When
Service(value = AAA)
Then
String name = Type1;
insert(name);

Something like this... but make sure not to create a loop :-)

Regards,
Frank


ChrisMu wrote:
 
 But then that would call the service.getType() method when the rule is
 run wouldn't it?
  
 I'm trying create explicit, simple rules to avoid doing extra work when
 running data through them.
  
 How would you use a rule to set the value within another rule?
  
 Thanks
 Chris
 
 
 
 From: FrankVhh [via Drools]
 [mailto:ml-node+3006589-784869490-404...@n3.nabble.com] 
 Sent: 31 May 2011 16:48
 To: Mullard, Christopher
 Subject: Re: Smart Templates
 
 
 Hi, 
 
 The way I see it, this is the way your template should look like. I do
 not see the need to use eval() at all. 
 
 rule DC_0 
 when 
 $service: Service(name == @{service}, value == @{value}) 
 $riskType: RiskType() 
 then 
 $riskType.setName($service.getType(@{value})); 
 $riskType.setAtt(0,@{value}); 
 end 
 
 I am assuming that RiskType is already inserted in WM, but you could
 just as well create a new object in the then-part of the rule. 
 
 In stead of using the java-function to determine the name, you might
 actually just as well create an other rule that sets the name according
 to the value, thus putting the entire decision logic in rules. 
 
 Hope this helps. 
 
 Regards, 
 Frank 
 
 
 
   ChrisMu wrote:
   Hi, 
   
I'm trying to get a template (.drt) to generate 2 rules (.drl)
 from 2 datasets but by doing a little bit more work than direct
 substitution. 
   
   Data (service,value): 
   DC, AAA 
   DC, XYZ 
   
   Idea for the template - if value is of type1 then create Type
 object with 'Type1' as name. If value is of type2, use 'Type2' as name: 
   
   rule DC_@{row.rowNumber} 
   when 
   Service(name == DC) 
   then 
   Type.setName(eval(Service.getType(@{value}))) 
   Type.setAtt(0,@{value}) 
   end template 
   
   eval(Service.getType(@{arg0})) should take 'AAA' or 'XYZ' etc as
 arg and return a string Type1/Type2 etc. 
   
   This would then generate 2 rules that look like: 
   
   rule DC_0 
   when 
   Service(name == DC, value == AAA) 
   then 
   RiskType.setName(Type1) 
   RiskType.setAtt(0,AAA) 
   
   rule DC_1 
   when 
   Service(name == DC, value == XYZ) 
   then 
   RiskType.setName(Type2) 
   RiskType.setAtt(0,XYZ) 
   
   ...is this possible at all? I'm trying to avoid the eval step
 being done in the actual rule (.drl) . 
   
   Thanks 
   
   Chris 
 
 
 
 
 
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Re: [rules-users] Is there any work going on for Drools on .net?

2011-05-30 Thread FrankVhh

Hi,

Besides IKVM, there is also the other option of using jni4net.

See: http://jni4net.sourceforge.net/ for info on jni4net

Pavel Savara even placed a working Drools example on the web, which is
available at: http://jni4net.googlecode.com/svn/trunk/content/samples/

Regards,
Frank

Wolfgang Laun-2 wrote:

This has been discussed previously on the
list.http://www.jboss.org/drools/lists

A lot of information is in the thread started by Jan 19 Gorantla,
Bhaskar
(GE Capital) Drools Java and .Net:
http://drools.46999.n3.nabble.com/Drools-Java-and-Net-tp2290536p2290536.html

-W

On 30 May 2011 07:58, rahultechie lt;rahul_vidh...@persistent.co.ingt;
wrote:

Hi,

I am currently working on Drools on .net. What I found that the latest
version of drool .net is 3.0 which was developed around 2007. After that
there is work no done on Drool .net.

On above investigation following are my some of questions,
1. Whatever information I got is correct?
2. I want to use drools in my .net project. Latest version of Drools is
5.0
in JAVA, in future can we see Drools 5.0 in .net?
3. Is there any work around for now to use Drools 5.0 in .net?

Any link to above question will be useful.
Thanks.

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Re: [rules-users] Question / problem

2011-05-12 Thread FrankVhh

Hi,

On a sidenote, there is also no real need to use the eval statement.

rule FirstRule
 when
 $testDrools : TestDroolsDto(myValue != )
 then
 System.out.println(Set my value to 1);
 $testDrools.setMyValue(1);
 update($testDrools);
end

rule SecondRule
 when
 $testDrools : TestDroolsDto(myValue == )
 then
 System.out.println(My Value :  + $testDrools.getMyValue() );
end

As you are only calling your getter methods, you do not need to use the eval
statement in the second rule. 

In the first rule, your eval did not really do much, as the condition of the
rule was completely dependable on the presence of TestDrools. And, as the
others stated, to prevent you from getting in a loop after calling Update(),
you can add an extra constraint in the rule.

Regards,
Frank


ino.nicolas wrote:
 
 Hi,
 
 I've got a little question. I've got a drl file which contains two rules :
 
 rule FirstRule
  salience 99
  when
  $testDrools : TestDroolsDto()
  eval ( 1 == 1 )
  then
  System.out.println(Set my value to 1);
  $testDrools.setMyValue(1);
 
 end
 
 rule SecondRule
  salience 1
  when
  $testDrools : TestDroolsDto()
  eval( $testDrools.getMyValue().equals() )
  then
  System.out.println(My Value :  + $testDrools.getMyValue() );
 end
 
 Is it normal that in my second rule is verified ?
 - eval( $testDrools.getMyValue().equals() ) is true
 but : System.out.println(My Value :  + $testDrools.getMyValue() ); 
 show me that myValue == 1
 
 Perhaps I did something wrong ?
 
 Thanks for your helping me.
 N.
 
 
 
 PS : Here is me TestDroolsDto :
 public class TestDroolsDto {
  private String myValue;
 
  public TestDroolsDto() {
  myValue=;
  }
 
  public String toString() {
  return  --  + myValue;
  }
 
  /**
  * @return the myValue
  */
 public String getMyValue() {
 if ( myValue == null ) {
 myValue = ;
 }
 return myValue;
 }
 
  /**
  * @param myValue the myValue to set
  */
 public void setMyValue( String myValue ) {
 this.myValue = myValue;
 }
 }
 
 
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Re: [rules-users] unable to create field extractor for tickerId

2011-04-21 Thread FrankVhh

Unable to create FIeld extractor, mostly that is because you did not
declare getters and in your java class.

Drools uses the getters to extract the needed values.

Make sure you use the correct naming conventions as well. I.e. public int
getTicketId(){...}

Regards,
frank


sirinath wrote:
 
 declare ReqMktData
   @role( event )
 end
 
 declare TickPrice
 @role( event )
 @expires( 2m )
 end
 
 declare TickSize
 @role( event )
 @expires( 2m )
 end
 
 
 rule Bids
   
   when
   $req: ReqMktData($tickerId : tickerId) from entry-point IB 
 Events
   $bidprice: TickPrice(field == 1, tickerId == $tickerId, this 
 after $req)
 from entry-point IB Events
   $bidsize: TickSize(field == 0, tickerId == $tickerId, this 
 after $req)
 from entry-point IB Events
   then 
   Bid bid = new Bid($tickerId, $req.contract, size, price);
   insert(bid);
 end
 
 
 
 
 
 
 public class ReqMktData {
   public int  tickerId;
   public Contract contract;
   public String   genericTickList;
   public boolean  snapshot;
 }
 


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Re: [rules-users] And Or Problem

2011-04-21 Thread FrankVhh

Hi,

No, it is indeed not possible to combine the operators that way. To make it
work, you will have to replace , with .

I believe in the expert documentation there is a section with examples of
constraints that can and cannot be used.

Regards,
Frank

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Re: [rules-users] Drools Decision Table

Hi,

One can not stress enough the importance of rule governance.

However, in your case, I think there is a quite simple solution to the
problem.

Why would you want to store decision logic to calculate a value that you
already know and that shouldn't change anymore? I think, in stead of storing
your rule, you should save the outcome of the rule. I.e. save the calculated
price and use this price in further calculations, rule executions, 

There are possibilities to use datetimes as well, but I don't think that is
necessary in this example.

Regards,
Frank 


Riyaz Saiyed wrote:
 
 Hi,
 
  
 
 I'm doing a POC on drools decision table. We need to develope pricing
 engine for few of our products. I created xls with list of products and
 their price as per drools format. When I load xls and run the rules, the
 price were picked up correctly against mathing product, customer and
 quantity criteria.
 
  
 
 Now I want to save the executed rule so the if there is any modification
 in quantity (increase/decrease), I can calculate the price again based
 on earlier executed rule and not from xls.
 
  
 
 I think to achieve the, I need to store the rule against every order
 for each product. 
 
  
 
 Can any one suggest me, how I can get the string representation of the
 executed rule so that I can create .drl file from that string and run
 the same rule again for any order modification.
 
  
 
 I've looked at SpreadsheetCompiler and was able to get the string of all
 the rules as a result of compile method. 
 
  
 
 Note - I can not read xls again for order modification because, if in
 between the price in xls has changed, the engine should still pick the
 old price.
 
  
 
 Thanks,
 
 Riyaz
 
  
 
 
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Re: [rules-users] Drools Decision Table

Agreed.  I consider tariff id an outcome of the rule execution and thus a
value as well. Once you have established your tariff, or tariff id, you do
not need to recalculate this.

Sorry for that, I will try to be less ambiguous next time.


Wolfgang Laun-2 wrote:
 
 Never duplicate any derived information while the data object holding the
 duplicate is still in the system.
 
 Given an invoice, you may associate its positions with a tariff id,
 which
 lets you recalculate an (old) order repeatedly, guaranteeing stable
 pricing.
 
 Only when this data is removed from the system you actually calculate and
 use the currency values.
 
 -W
 
 
 
 2011/4/17 Riyaz Saiyed lt;riyaz.sai...@emirates.comgt;
 
  Hi,



 I'm doing a POC on drools decision table. We need to develope pricing
 engine for few of our products. I created xls with list of products and
 their price as per drools format. When I load xls and run the rules, the
 price were picked up correctly against mathing product, customer and
 quantity criteria.



 Now I want to save the executed rule so the if there is any modification
 in
 quantity (increase/decrease), I can calculate the price again based on
 earlier executed rule and not from xls.



 I think to achieve the, I need to store the rule against every order
 for
 each product.



 Can any one suggest me, how I can get the string representation of the
 executed rule so that I can create .drl file from that string and run the
 same rule again for any order modification.



 I've looked at SpreadsheetCompiler and was able to get the string of all
 the rules as a result of compile method.



 Note - I can not read xls again for order modification because, if in
 between the price in xls has changed, the engine should still pick the
 old
 price.



 Thanks,

 *Riyaz***



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Re: [rules-users] Drools Decision Table

In this case, the rule outcomes will change, so you need to redo the
reasoning, because there is certain information that couldn't be passed
after the first rule execution.

This implies that you have to keep your rules somewhere and you would need
rule governance to manage versioning problems. You could f.e. make the admin
create a new version of the xls, but based on a previous version. Be very
careful here that he cannot overwrite the previous files.

Alternatively, you could actually save each version of the knowledgebase in
a database, with some time attributes attached. At runtime, you create a
session based on the knowledgebase that has a creation date closest before
the date of the request. This requires a lot of governance as well, as you
have to decide when to save a new kbase, which bases will never be used
again etc.

I would try to avoid the last alternative, but it is the only thing that I
can think of to achieve your requirement.

Regards,
Frank


Riyaz Saiyed wrote:
 
 The idea is to store these price rules as xls decision table.
 
 The admin (non technical guy) will periodically update the xls just to
 change the price. 
 
 For example for the same date range - 1-Jan-2011 to 31-Mar-2011, price can
 be increased of decrease depending on the volume of requests. So creating
 multiple version (more entries in xls) may be time consuming for him. He
 will prefer to do find and replace to update the price.
 


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Re: [rules-users] Drools Decision Table

Technically, this is feasible, but consider the following issues:

- You will have to save the entire ruleset as a string
- If you only save part of the ruleset as string: how are you going to
decide which part and how are you going to combine this with the other
rules?
- You will have an incredible abundance of duplicate rule strings, most of
them exaclty the same as a lot of other rule strings.


Riyaz Saiyed wrote:
 
 The initial idea was to save a rule string as additional column in
 database with every booking request (against each product). Next time for
 any modification (for same product), I can create a .drl file from
 previously stored string at runtime and execute the rule again.
 
 -With best regards,
 Riyaz
 


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Re: [rules-users] Drools Decision Table

Sorry, but I forgot an issue: 
- You will have to create a new knowledgebase, at least for each time an
existing order is modified. Kbase creation is not a friend of perfomance.

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Re: [rules-users] help! rulerule_key failed to predicate

2011-04-15 Thread FrankVhh

Hi,

I thnik you might need to reposition dialect = mvel. The compiling error
will go away if you put it inside each of your rules. See example:

rule system will execute 'tc' command
   
 when
dialect mvel
eval(Server.Message8388608)
 then 
 System.out.println(The network is so crowd that it needs repairing.);
Runtime.getRuntime().exec(tc);#give the authority and execute the tc
command
end
 
rule caution
dialect mvel
when 
eval(Server.Message==8388608)
then 
System.out.println(caution!The network maybe will get blocked very
soon.);
end 
 
rule fluent network
  dialect mvel
  when
  eval(Server.Message8388608)#conditions
 then 
  System.out.println(the current network is very good);#actions
end

Also, mvel is needed to make the eval statement work. In your case, it
might not be needed to work with eval at all.

WHEN Server.message   should work as well. Providing you have an
attribute message in Server with a getter defined.

Regards,
Frank


赵慧 wrote:
 
 hello,everyone! I wrote a rule with Drools, I compile the program and get
 the errors as follows: 
 
 [3,0]: [ERR 103] Line 3:0 rule 'rule_key' failed predicate:
 {(validateIdentifierKey(DroolsSoftKeywords.RULE))}? in rule
 [3,9]: [ERR 101] Line 3:9 no viable alternative at input 'com' in rule
 package
 [7,0]: [ERR 101] Line 7:0 no viable alternative at input 'import' in rule
 package in rule sample  
 
 I don't know how it happened, looking forward to your reply! thank you !!! 
  
 PS: My rules are here:
  dialect mvel
 package  com.sample
 import com.sample.Server;
 
 rule system will execute 'tc' command

  when
 eval(Server.Message8388608)
  then 
  System.out.println(The network is so crowd that it needs
 repairing.);
 Runtime.getRuntime().exec(tc);#give the authority and execute the
 tc command
 end
  
 rule caution
 when 
 eval(Server.Message==8388608)
 then 
 System.out.println(caution!The network maybe will get blocked
 very soon.);
 end 
  
 rule fluent network
   when
   eval(Server.Message8388608)#conditions
  then 
   System.out.println(the current network is very good);#actions
 end
  
  
   
 
 
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Re: [rules-users] How to use KnowledgeBase

Hi,

In theory, you can do it both ways. Depending on your situation, you will
have to assess which approach will be the best solution.

Regarding the fact that creation of a kbase takes some time, you will
probably want to avoid doing it multiple times per transaction or, at least,
cache them. Also, when your rules are part of a continupus flow, you
probably want only 1 kbase.

In your situation, mortgages, I assume your rules are following eachother
with no or very little interaction from the user. In that case, I think one
would normally use 1 knowledgebase.

Theoretically, multiple knowledgebases should be used when dealing with
completely different rulesets, with one ruleset not influencing the other
(or execution of ruleset one happening in a totally different timeframe as
to justify the use of another kbase).

I hope this makes it clear.

Regards,
Frank


ismaximum wrote:
 
 Hi
 
 I am new to Drools and just want to start developing our app with Drools.
 I have some questions regarding KnowledgeBase instantiation. 
 
 Can we create a single instance of KB across the application and use it to
 create any stateful or stateless session? 
 In this case, do we need to add all the rules available in our application
 or we need to create one instance for each set of rules? In other words,
 consider we have many rules including mortgage calculation/ validation,
 auditing process, interest rate calculation and many others, do we need to
 create one instance of KB for each rule or just one KB and add all the
 rules to it?
 


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[rules-users] Rule Templates

Hi all,

In the Expert Guide and on some places on the internet, I read about Rule
Templates.

I think this is a very interesting feature. However, the expert manual
states to use it with caution as it is still an experimental feature.

Also, there isn't that much information on the web either.

Is it already encouraged to use it in production, or is it still very much
in a development phase and should it only be used for educational purposes?

Thanks a lot  lots of regards,
Frank

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Re: [rules-users] Rule Templates

Hi W.,

Thanks for the fast reply.

Meanwhile, I have been trying to play with the templates. Unfortunately, I
run into a nullpointerexception in the problems view of Eclipse. At first, I
hoped it was the same error as in
http://lists.jboss.org/pipermail/rules-users/2010-November/017229.html but
that does not seem to be the case.

Underneath, you can find my drl file. This is the only artifact that I am
having right now. There is no Java code yet, apart from the Price object.
This shouldn't be necessary to fix the problem either.

I tried to comment out some pieces of code to narrow down on the problem.
The nullpointerexception persists even if you comment everything from
package to the bottom of the file. This should indicate the problem has to
be in the template header, but I do not have a clue.

Could anyone help with this?

Thanks in advance.

==

template header
minimumValue
maximumValue
precision
startlevel
endlevel
roundingvalue

package rounding

import rounding.Price;

template Determine evaluated decimals
rule Determine evaluated decimals @{row.rowNumber}
salience 25
lock-on-active true
when
$price: Price(integerpart = @{minimumValue}  integerpart 
@{maximumValue}  evaluateddecimals == 999)
then
$price.setRoundedPrecision(@{precision});
$price.calculateNumberOfRoundedDecimals();
$price.calculateEvaluatedDecimals();
$price.calculateBasenumber();
update($price);
end
end template

template Determine rounding value
rule Determine rounding value @{row.rowNumber}
salience 0
no-loop true
when
$price: Price(integerpart = @{minimumValue}  integerpart 
@{maximumValue}  evaluateddecimals = @{startlevel}  evaluateddecimals 
@{endlevel})
then
$price.setRoundedPrice($price.getBasenumber() + 
@{roundingvalue});
System.out.println($price.getPrice() +  =  + (double)
$price.getRoundedPrice() / Math.pow(10,$price.getNumberofroundeddecimals())
);
end
end template

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Re: [rules-users] Rule Templates

Hi,

After trying the example from the documentation, eclipse returned the same
error. So, I got the same idea and just worked further ignoring eclipse.

I saw what I saw and that was that it works fine now, even with the error
still displayed in the problems view.

Thanks for the help ;-)

Regards,
Frank


Wolfgang Laun-2 wrote:
 
 Not that I can see any problem. Disregard the Eclipse error, expand the
 template as documented, and then we'll see what we'll see...
 -W
 
 On 14 April 2011 15:36, FrankVhh lt;frank.vanhoensho...@agserv.eugt;
 wrote:
 
 Hi W.,

 Thanks for the fast reply.

 Meanwhile, I have been trying to play with the templates. Unfortunately,
 I
 run into a nullpointerexception in the problems view of Eclipse. At
 first,
 I
 hoped it was the same error as in
 http://lists.jboss.org/pipermail/rules-users/2010-November/017229.html
 but
 that does not seem to be the case.

 Underneath, you can find my drl file. This is the only artifact that I am
 having right now. There is no Java code yet, apart from the Price object.
 This shouldn't be necessary to fix the problem either.

 I tried to comment out some pieces of code to narrow down on the problem.
 The nullpointerexception persists even if you comment everything from
 package to the bottom of the file. This should indicate the problem has
 to
 be in the template header, but I do not have a clue.

 Could anyone help with this?

 Thanks in advance.

 ==

 template header
 minimumValue
 maximumValue
 precision
 startlevel
 endlevel
 roundingvalue

 package rounding

 import rounding.Price;

 template Determine evaluated decimals
 rule Determine evaluated decimals @{row.rowNumber}
salience 25
lock-on-active true
when
$price: Price(integerpart = @{minimumValue} 
 integerpart
 
 @{maximumValue}  evaluateddecimals == 999)
then
$price.setRoundedPrecision(@{precision});
$price.calculateNumberOfRoundedDecimals();
$price.calculateEvaluatedDecimals();
$price.calculateBasenumber();
update($price);
 end
 end template

 template Determine rounding value
 rule Determine rounding value @{row.rowNumber}
salience 0
no-loop true
when
$price: Price(integerpart = @{minimumValue} 
 integerpart
 
 @{maximumValue}  evaluateddecimals = @{startlevel} 
 evaluateddecimals
 
 @{endlevel})
then
$price.setRoundedPrice($price.getBasenumber() +
 @{roundingvalue});
System.out.println($price.getPrice() +  =  + (double)
 $price.getRoundedPrice() /
 Math.pow(10,$price.getNumberofroundeddecimals())
 );
 end
 end template

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Re: [rules-users] Combination of conditions doesn't work

2011-04-07 Thread FrankVhh

Hi Sariman,

The trick with from entry-point, is quite unfamiliar to me. There might be
some problem with that, but I cannot tell by looking at it.

However, there are a few problems with the rules that you have printed out
for us.

1) The way I understand it, they do not do what they should be doing. You
said you do NOT want an action when all sensors evaluate to true. In your
case, you are evaluateing whether all sensors are false. This is pretty
useless if you already have a rule which evaluates the existence of at least
1 true sensor. The way I would put this is like this:

rule Myrule
when
#conditions
sensorEvent1: SensorEvent(booleanValue == true)
exists( SensorEvent(booleanValue == false) )
then 
#actions
end

2) There are some errors in your rule. No idea whether this is a copy/paste
or a read/type, so I will just point them out.
- ; is usually not needed in a LHS, I am not familiar with the from
entry-point syntax, but I assume it wouldn't be needed
- There is a ) in excess in one of your conditions

3) I don't think it makes sense to put your rules as you did in the second
example. Even if you are trying to examine whether those three sensors are
false.

On a personal note: what does from entry-point do? I must have overlooked it
in the documentation.

Regards,
Frank


sariman wrote:
 
 To keep it short, I have three sensors providing me some values every x
 seconds. I am running an algorithm over those values and getting at the
 end a single value for each sensor. Next I check if this value is
 greater/less than a threshold value and creating an object and setting its
 booelan value to true/false. The last part looks like this:
 
 SensorEvent sensorEvent = new SensorEvent ();
   sensorEvent.setBoolean(booleanValue);
   sensorEvent.setSensorID(sensorID);
 
 I want to do some actions if one of the sensors has true and this works.
 But I want no action if all sensors have true. And this part doens't
 work. If I only check one of the sensors if it is false it is ok but the
 combination doesn't work. It means this case seems naver to happen. No
 exception or error but no system print either. Here is the code snippet
 from my rules file:
 
 declare SensorEvent
   @role(event)
 end
 
 
 rule All false
 
   when
   #conditions
   sensorEvent1: SensorEvent(sensorID == 1 , booleanValue == 
 false)from
 entry-point Default;
   sensorEvent2: SensorEvent(sensorID == 5 , booleanValue == 
 false) )  from
 entry-point Default;
   sensorEvent3: SensorEvent(sensorID == 6 , booleanValue == 
 false)from
 entry-point Default;
   
   then 
   #actions
   System.out.println( All false!! - );
 
 end
 
 
 I run the engine in stream mode and every single value (or object) is
 being inserted after I receieved the value. I also tried this variant but
 it didn't work either:
 
 rule All false
 
   when
   #conditions
   sensorEvent1: SensorEvent(sensorID == 1 )   from 
 entry-point Default;
   sensorEvent2: SensorEvent(sensorID == 5 )   from 
 entry-point Default;
   sensorEvent3: SensorEvent(sensorID == 6 , booleanValue == 
 false 
 sensorEvent1.booleanValue == false  sensorEvent2.booleanValue == false))
 from entry-point Default;
   
   then 
   #actions
   System.out.println( All false!! - );
 
 end
 
 Any suggestions?
 


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Re: [rules-users] Combination of conditions doesn't work

2011-04-07 Thread FrankVhh

Yes, thanks Manstis. I am already informing myself as we speak :-).


manstis wrote:
 
 @FrankVhh
 
 Entry-points are used with CEP; you'll find details in the Fusion
 documetation.
 
 With kind regards,
 
 Mike
 
 On 7 April 2011 15:21, FrankVhh lt;frank.vanhoensho...@agserv.eugt;
 wrote:
 
 Hi Sariman,

 The trick with from entry-point, is quite unfamiliar to me. There might
 be
 some problem with that, but I cannot tell by looking at it.

 However, there are a few problems with the rules that you have printed
 out
 for us.

 1) The way I understand it, they do not do what they should be doing. You
 said you do NOT want an action when all sensors evaluate to true. In your
 case, you are evaluateing whether all sensors are false. This is pretty
 useless if you already have a rule which evaluates the existence of at
 least
 1 true sensor. The way I would put this is like this:

 rule Myrule
when
#conditions
sensorEvent1: SensorEvent(booleanValue == true)
exists( SensorEvent(booleanValue == false) )
then
#actions
 end

 2) There are some errors in your rule. No idea whether this is a
 copy/paste
 or a read/type, so I will just point them out.
- ; is usually not needed in a LHS, I am not familiar with the from
 entry-point syntax, but I assume it wouldn't be needed
- There is a ) in excess in one of your conditions

 3) I don't think it makes sense to put your rules as you did in the
 second
 example. Even if you are trying to examine whether those three sensors
 are
 false.

 On a personal note: what does from entry-point do? I must have overlooked
 it
 in the documentation.

 Regards,
 Frank


 sariman wrote:
 
  To keep it short, I have three sensors providing me some values every x
  seconds. I am running an algorithm over those values and getting at the
  end a single value for each sensor. Next I check if this value is
  greater/less than a threshold value and creating an object and setting
 its
  booelan value to true/false. The last part looks like this:
 
  SensorEvent sensorEvent = new SensorEvent ();
sensorEvent.setBoolean(booleanValue);
sensorEvent.setSensorID(sensorID);
 
  I want to do some actions if one of the sensors has true and this
 works.
  But I want no action if all sensors have true. And this part doens't
  work. If I only check one of the sensors if it is false it is ok but
 the
  combination doesn't work. It means this case seems naver to happen. No
  exception or error but no system print either. Here is the code snippet
  from my rules file:
 
  declare SensorEvent
@role(event)
  end
 
 
  rule All false
 
when
#conditions
sensorEvent1: SensorEvent(sensorID == 1 ,
 booleanValue
 == false)from
  entry-point Default;
sensorEvent2: SensorEvent(sensorID == 5 ,
 booleanValue
 == false) )  from
  entry-point Default;
sensorEvent3: SensorEvent(sensorID == 6 ,
 booleanValue
 == false)from
  entry-point Default;
 
then
#actions
System.out.println( All false!! - );
 
  end
 
 
  I run the engine in stream mode and every single value (or object) is
  being inserted after I receieved the value. I also tried this variant
 but
  it didn't work either:
 
  rule All false
 
when
#conditions
sensorEvent1: SensorEvent(sensorID == 1 )   from
 entry-point Default;
sensorEvent2: SensorEvent(sensorID == 5 )   from
 entry-point Default;
sensorEvent3: SensorEvent(sensorID == 6 ,
 booleanValue
 == false 
  sensorEvent1.booleanValue == false  sensorEvent2.booleanValue ==
 false))
  from entry-point Default;
 
then
#actions
System.out.println( All false!! - );
 
  end
 
  Any suggestions?
 


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Re: [rules-users] The update function inside a rule

2011-03-30 Thread FrankVhh

There might be some conceptual problem going on here.

Calling a ruleset with just (one of- those rules would indeed not produce
the desired results (leaving the timer aside).

Here is what happens:
1) The rule matches because endtime  currenttime
2) Rule is put on agenda
3) As the only rule in the agenda, it is executed and sets the endtime to a
couple of seconds in the future
4) WM is updated and rules are re-evaluated
5) No more matching rules because endtime  currenttime
6) Rule execution stops

I do not know exactly what Marc is doing, but I assume he is trying to keep
the engine alive by calling fireAllrules time after time. Part of the
problem may be lying here. Could you show us the all parts of your code
where you have fireAllRules()  coded?

Additionally, we can be hoping, but the issue with the timer will probably
remain. Did you try to System.out the values of endtime and currenttime
after each rule execution?

Regards,
Frank 


Wolfgang Laun-2 wrote:
 
 On 29 March 2011 19:04, marc lt;marc.stra...@gmail.comgt; wrote:
 
 gt; Thanks,
 gt; The JBRULES-2825 seems to be a similar issue indeed !
 gt;
 gt; The timer is necessary: When change the value of SimpleClock and I
 only do
 gt; an update (obj), without calling fireAllRules(). That way the rule
 doesn't
 gt; fire...  Is-it an other problem ??
 gt;
 gt; If I do a update + fireAllRulles() when I change the timer, the
 rule_b fire
 gt; fine every 10 seconds. (without timer in the rule..)
 gt;
 gt; Sorry, but I do not understand what you mean by any of these two
 scenarios.
 -W
 
 
 
 gt;
 gt; I think there is an open JIRA for a very similar issue:
 gt;
 gt; JBRULES-2825 amp;quot;rule with timer and CE not keeps firing after
 turning
 gt; falseamp;quot;
 gt;
 gt; I have added these two rules as a comment.
 gt;
 gt; However, the timer isn't necessary in this here case. Since the
 SimpleClock
 gt; fact is updated periodically, the engine will fire the rule as soon
 as
 gt; dateInMillisec exceeds the clock value in the Message fact.
 gt;
 gt; Both rules work correctly, if written without the timer.
 gt;
 gt; Actuallay, the timer doesn't have any effect (except wasting a few
 cycles).
 gt; If the LHS becomes true, it delays the first firing by 1s, and then
 the LHS
 gt; is made false by changing the Message object. This stops the timer!
 But
 gt; then, eventually, the LHS becomes true again, and *another timer *is
 gt; started, delays 1s, fires, and terminates.
 gt;
 gt; -W
 gt;
 gt;
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Re: [rules-users] The update function inside a rule

2011-03-30 Thread FrankVhh

Not entirely,

Wolfgang could probably explain this a lot better than me, but I will give
it a try.

1) Rule execution stops -or it should stop- as soon as there are no more
rules with conditions that are true. Therefor, the rules should only be
executed once.
2) You would not need your timer because the only thing it does, is to slow
down rule execution 1 sec. And, as wolfgang pointed out, the timer stops, or
should stop, once the condition becomes false.

Now, in your case, it appears the only job the timer does, is to keep the
session alive, which appears to be a bug.

What you need, is not a timer. You need something to keep your session alive
during the time your conditions are false. Preferably something that is not
buggy. This could be achieved by f.e. fireUntilHalt(), or whatever
intelligent design you can come up with.

About adding log to trace the values of endDate, the traces show correct
values. But it doesn't trace the value viewed by the drools engine itself
wich could be different (just as if I don't do an update() after a
modification)

If you rpint the value that is evaluated in the condition, that should be
the value drools sees... But I am not an expert in JVM, so I could be wrong.

Regards,
Frank

marc wrote:

I was using only one fireAllRules() after insert(message) and not
fireUntilHalt(). But is should be enough : as the rule change update the
fact, the rule is applied again (10 seconds later, and not 1second).

With fireUntilHalt() the rule work fine (and without timer)... but it
burns the CPU (the java process reach 50% on a bi-proc) while a simple
call to fireAllRues() after the timer update use nothing... This doesn't
make sense to me because the drools engine is only notified of a fact
modification only 1 time per second (the timer update), so it should only
fire all rules a this moment and that all (just like a fireAllRules()
after the update(SimpleClock) does), so why does it takes so much CPU ? I
can post the code but I should open a other thread because it not the same
problem ?

Marc

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Re: [rules-users] Rule storage

2011-03-29 Thread FrankVhh

Hi all,

Thanks for your inputs Manstis and Mister X. Out of pure gratitude, I will
make sure your name remains unspoken :-).

This is my second attempt to write a reply, some weird thing happened during
the previous one. I hope it does not suddenly show up on the message board.

There surely is something in the DSL approach. Using DSL that way, you
copuld actually replace variables by a possibly more flexible alternative.

However, there are some drawbacks as well, as there will still be some
manageablility issues. Suppose prices go up by 5% in year X and by another
2% in year Y. This would mean you have to do some calculations in order to
get your DSL straight. Also, you would need to know which groups could be
bulk updated in the future. If there are some corss-overs, that might
complicate things as well.

Providing you can control versioning, I guess a more direct approach might
be the way to go.

But no need to worry about that, you helped me a lot gaining more insight,
especially the silent one.

Thanks,
Frank  

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Re: [rules-users] The update function inside a rule

2011-03-29 Thread FrankVhh

Hi Marc,

Your rules do not immediately reveal anything remarkable to me, so I do not
have an explanation or solution just yet.

Here is what I would do to narrow down on the problem:
Add an output in your rules that print the internal end date and the current
date in each RHS of the rules.

It is unlikely that the WM is not updated at all, that would cause
internalEndDate to remain unchanged and rules wouldn't be fired anymore.

Regards,
Frank


Marc Strabin wrote:
 
 Hello,
 I've 2 rules which should be similar but the result is different and I
 can't
 understand why :
 
 I insert an object Message() into drools with the following rule :
 
 rule quot;rule_aquot;
 timer (int:1s 1s)
 when
 SimpleClock ( d : dateInMillisec != 0 )  // SimpleClock give the current
 time (set by a java timer and an update)
 m : Message ( internalEndDate lt; d )
 then
  System.out.println( quot;rule aquot;);
 m.setInternalEndDate (d + 1);
 * retract (m);*
 * insert (m);*
 end
 
 
 gt; the result is fine : a message every 10.
 
 If I replace the rule_a by the rule_b : (because an update should be
 better
 than an retract/insert I guess)
 
 rule quot;rule_bquot;
 timer (int:1s 1s)
 when
 SimpleClock ( d : dateInMillisec != 0 )  // Simple slock give the current
 time (set by a java timer and an update)
 m : Message ( internalEndDate lt; d )
 then
  System.out.println( quot;rule bquot;);
 m.setInternalEndDate (d + 1);
 * update (m);*
 end
 
 
 gt; the result is bad : a message every 1 second.
 
 It act as if the attibute message.internalEndDate wasn't updated in the
 drools engine. Could someone explain me if/why this behaviour is normal ?
 Thanks in advance
 
 Marc
 
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Re: [rules-users] The update function inside a rule

2011-03-29 Thread FrankVhh

I'm sorry, that didn't make any sense. An un-updated internal enddate would
indeed cause the LHS condition to remain true, and the timer will cause it
to fire each second.

My bad...


FrankVhh wrote:
 
 Hi Marc,
 
 Your rules do not immediately reveal anything remarkable to me, so I do
 not have an explanation or solution just yet.
 
 Here is what I would do to narrow down on the problem:
 Add an output in your rules that print the internal end date and the
 current date in each RHS of the rules.
 
 It is unlikely that the WM is not updated at all, that would cause
 internalEndDate to remain unchanged and rules wouldn't be fired anymore.
 
 Regards,
 Frank
 
 
 Marc Strabin wrote:
 
 Hello,
 I've 2 rules which should be similar but the result is different and I
 can't
 understand why :
 
 I insert an object Message() into drools with the following rule :
 
 rule quot;rule_aquot;
 timer (int:1s 1s)
 when
 SimpleClock ( d : dateInMillisec != 0 )  // SimpleClock give the current
 time (set by a java timer and an update)
 m : Message ( internalEndDate lt; d )
 then
  System.out.println( quot;rule aquot;);
 m.setInternalEndDate (d + 1);
 * retract (m);*
 * insert (m);*
 end
 
 
 gt; the result is fine : a message every 10.
 
 If I replace the rule_a by the rule_b : (because an update should be
 better
 than an retract/insert I guess)
 
 rule quot;rule_bquot;
 timer (int:1s 1s)
 when
 SimpleClock ( d : dateInMillisec != 0 )  // Simple slock give the current
 time (set by a java timer and an update)
 m : Message ( internalEndDate lt; d )
 then
  System.out.println( quot;rule bquot;);
 m.setInternalEndDate (d + 1);
 * update (m);*
 end
 
 
 gt; the result is bad : a message every 1 second.
 
 It act as if the attibute message.internalEndDate wasn't updated in the
 drools engine. Could someone explain me if/why this behaviour is normal ?
 Thanks in advance
 
 Marc
 
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[rules-users] Rule storage

Hi all,

This may be a stupid question, but is there a way to see your Guvnor-rules
outside Guvnor in some kind of readable file?

I noticed jackrabbit is used as a repository, so I would like to have a look
in there, but I am not able to find it in the expanded guvnor.war folder.

The version I am using is Guvnor 5.1.1, with standard configuration.

A look in the Guvnor documentation did not help me out. Feel free to burn me
if I missed it :-)

Thanks and regards,
Frank

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Re: [rules-users] Rule storage

Hi,

Thanks for your quick reply, Salaboy.

Webdav indeed allow me to browse through the packages and I was able to
locate a file mortgage-sample-repository.xml in the folder WEB-INF/classes
of drools-fuvnor.war.

However, changes in the xml did not show up in Guvnor and vice versa. So,
jackrabbit has to store its contents somewhere else. The folder repository
only consists of class-files.

The reason I am looking for this file, is because I am looking for ways to
simultaneously update multiple rule parameters, without adding a new rule to
the ruleset. F.e. we want all base prices of our beverages to increase by
5%.

It would be as if you run an sql update statement on a rule database.
You'll probably need to parse the drl to achieve this.

Regards,
Frank

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Re: [rules-users] Rule storage

Hi,

Tx agaiin for the clarification on the .xml file. It makes a lot more sense,
now.

Bulk update is indeed not provided, I was hoping to have a look at the way
the rules were stored (probably plain drl, or isn't it?) to assess what
effort a bulk update would take.

If you mean by your last statement to have rules that set the initial base
price, and afterwards add rules to modify the base price (when beverage(),
then b.augmentBasePrice(5)), I absolutely agree it is the best solution,
implementation-wise.

Regarding rule management and governance, there are a few issues that might
arise.
 1) It is more difficult to get a view on your base prices
 2) What if base prices are adapted manually to the desired level? Which
adaptation rules need to be deleted or changed?

I am not saying that this should be basic functionality of a brms, neither
am I very fond of the requirement myself. As it shifts the burden of work
from the business to the more technical people :-)

Regards,
Frank


manstis wrote:
 
 mortgage-sample-repository.xml is the example repository installed into
 Guvnor when you first deploy (and answer quot;yesquot; to the install
 examples
 prompt).
 
 Changing this XML will therefore have no effect, unless you re-import the
 XML too using the Administration functions in Guvnor.
 
 In order to achieve what you state you'd need to (a) use the JCR API to
 query the underlying datastore, (b) re-build your binary rule package. We
 don't provide a bulk update facility.
 
 Given your example would it be not best to have Beverages themselves as
 Facts and have rules that set their prices?
 
 Think of the Rules Engine as a RDBMS and the Facts as records.
 
 With kind regards,
 
 Mike
 
 On 28 March 2011 14:09, FrankVhh lt;frank.vanhoensho...@agserv.eugt;
 wrote:
 
 gt; Hi,
 gt;
 gt; Thanks for your quick reply, Salaboy.
 gt;
 gt; Webdav indeed allow me to browse through the packages and I was able
 to
 gt; locate a file mortgage-sample-repository.xml in the folder
 WEB-INF/classes
 gt; of drools-fuvnor.war.
 gt;
 gt; However, changes in the xml did not show up in Guvnor and vice versa.
 So,
 gt; jackrabbit has to store its contents somewhere else. The folder
 gt; quot;repositoryquot;
 gt; only consists of class-files.
 gt;
 gt; The reason I am looking for this file, is because I am looking for
 ways to
 gt; simultaneously update multiple rule parameters, without adding a new
 rule
 gt; to
 gt; the ruleset. F.e. we want all base prices of our beverages to
 increase by
 gt; 5%.
 gt;
 gt; It would be as if you run an sql update statement on a quot;rule
 databasequot;.
 gt; You'll probably need to parse the drl to achieve this.
 gt;
 gt; Regards,
 gt; Frank
 gt;
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 gt; View this message in context:
 gt;
 http://drools-java-rules-engine.46999.n3.nabble.com/Rule-storage-tp2742515p2743044.html
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Re: [rules-users] Rule storage

Mike,

Thanks again for your swift reply.

I have one more question, though :-) What do you mean by only need to
update DSL? I really don't get this. Imo, DSL are just rules with a shirt
on.

Regards,
Frank

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Re: [rules-users] Limiting rule evaluation--not firing

2011-03-21 Thread FrankVhh

Hi,

Having the same questions you had, I played a bit with agenda-groups to see
if there was any notable performance effect.

I added 200 extra rules which did not fire at all and did two series of
rule executions. Once with all rules within the same agenda-group and once
with the 200 extra rules in a different agenda-group, while setting focus to
the firing rules. Allthough I cannot claim statistical significance, I
didn't notice big effects.

As I consider it, the reason for still evaluating all rules is because you
would need an Update() statement everytime focus is switched to an other
agenda-group to make sure Objects are matched to those rules.

Maybe ruleflow-groups work a bit different - allthough I doubt it - but I
haven't played with them yet.

Regards,
Frank

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Re: [rules-users] Limiting rule evaluation--not firing

2011-03-21 Thread FrankVhh

Hi all,

This is a very interesting discussion, so I re-read the Drools Flow manual.
IN section 8.1, it is stated as one of the reasons to use rules in your
process:

Performance: Rule evaluation is optimized.

How do I have to understand this? Does rule evaluation only happens for the
rules that are in the current ruleflowgroup? Because the above conversation
seems to imply it isn't.

Regards,
Frank


Swindells, Thomas wrote:
 
 That's probably the best way to go. I think it's a case of experimentation
 to work out what runs best (and please report your results). Things to
 consider are what order you have the conditions in the rules (the control
 fact first is probably most efficient but may be worth comparing with it
 at the end) and the order you insert facts - do you insert the control
 fact first or last.
 
 Thomas
 
 From: rules-users-boun...@lists.jboss.org
 [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Vincent Legendre
 Sent: 21 March 2011 13:47
 To: Rules Users List
 Subject: Re: [rules-users] Limiting rule evaluation--not firing
 
 ok.
 So the only way to do that is to add a control fact, and update it at
 runtime...
 Do you think that using the quot;control factquot; method will speed up
 the execution time for a large ruleset that have different ruleflow-group
 ?
 My feeling is yes, especially if quot;firstquot; rules does many
 updates, but I haven't done any tests.
 
 Le 21/03/2011 14:37, Swindells, Thomas a écrit :
 The thing to remember is that fact evaluation occurs at object
 insert/update time, not at the point you call fireAllRules. Salience,
 Agenda and rufeflow control on the other hand are runtime conditions which
 control which rules are actually activated in what order.
 
 Thomas
 
 From:
 rules-users-boun...@lists.jboss.orglt;mailto:rules-users-boun...@lists.jboss.orggt;
 [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Vincent Legendre
 Sent: 21 March 2011 13:34
 To: Rules Users List
 Subject: Re: [rules-users] Limiting rule evaluation--not firing
 
 And what about ruleflow-group ?
 There is no network filtering for that too ? The ruleflow-group behaves
 like an agenda filter, but still evaluate all nodes ?
 Could we imagine setting quot;tagsquot; to nodes, and stop propagation
 for node that does not declare the current task tag ?
 
 
 Le 21/03/2011 14:20, Edson Tirelli a écrit :
 
The algorithm as is does eager evaluation, as for the general case that
 is still better than doing selective evaluation.
 
If, in your case, the decision of which rules to fire is an arbitrary
 application decision, and not based on the actual constraints of the rules
 themselves, then the only way would be by creating a control fact:
 
 rule 1
 when
ControlFact( phase == Phase.ONE )
 ...
 
 rule 2
 when
ControlFact( phase == Phase.TWO )
 ...
 
This way, if the control fact is the first pattern in each rule it
 effectively disables all the beta evaluations for rules of phases other
 than the current one. Just be aware that by blocking the eager evaluation
 this way, phase switches are heavier than without the control fact, where
 most constraints were already previously evaluated. Obvious, but worth
 saying out loud... :)
 
There is also a feature that Leonardo is working on that makes the
 engine automatically unlink and relink parts of the network, based on the
 existence and possibility of matching the other required facts in a rule
 LHS. It might achieve similar results to what you are looking for in some
 cases, but that is totally based on the constraints in there and not on
 any arbitrary application decision.
 
Edson
 
 
 
 
 
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Re: [rules-users] .drl(rule)file creation

Hi kedar,

Of course, I do not know what you are trying to achieve in the end, but from
the limited information that I have, I think I can agree with manstis that
there are 2 options.

1) Download and install Guvnor, which is a UI to edit rules and may be
exaclty what you want.
2) Write an application that constructs a text file, based on some inputs
and save the text file as myveryimportantrules.drl

I have never tried option 2, but it doesn't seem very hard. 


kedar vyawahare wrote:
 
 Thanks for reply.
 yaa i want exactly the same my U.I should generate the DRL file .But I
 dont
 know how to generate a DRL file through U.I.
 Please help me to generate the DRL through U.I.
 Thanks in Advance.
 Kedar
 
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Re: [rules-users] Drools verifier

Hi Wolfgang,

I was about to report the fact that using drools-verifier 5.2.0 M1 didn't
help, when I saw your comment about checking the error.

Apparently there is something wrong:
### Verifier errors ###
[ERR 101] Line 1:1 no viable alternative at input ':'
Verifier could not form a PackageDescr from the resources that it was trying
to verify.

I do not understand this completely. When I execute the ruleset, it runs as
planned, but this error message seems to imply there is something wrong with
the drl.

Is it a problem that I feed the verifier with
String ruleText  =
C:\\Users\\Frank\\Documents\\DroolsWorkSpaces\\EmpiricalExperiments\\Financial
Rules\\src\\main\\rules\\clearancerules.drl;
verifier.addResourcesToVerify( 
ResourceFactory.newReaderResource(

  new StringReader( ruleText ) ), ResourceType.DRL );

Do the inputs need to be in another format or is there definitely something
wrong in the rules themselves?

Regards,
Frank

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Re: [rules-users] Drools verifier

Hi Wolfgang,

Yes, you are absolutely right about the path mistake. Can't believe I missed
that. Fixing it removes the errors from the verifier.

However, it still does not return the expected outputs...

System.out.println(result.getVerifierData().getAll().isEmpty()); = returns
false, which is as expected

But the following statement still does not return anything.
for (VerifierMessageBase base : result

.getBySeverity(Severity.WARNING)) {
System.out.println(base);
}

I'm sorry to take so much of your time, I really appreciate your efforts.

Regards,
Frank

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Re: [rules-users] Drools verifier