[rules-users] Executing more than one rules having no infinite execution

[Hushen Savani]

Hi,

 

I have a simple rule as following:

 

import java.util.HashMap;

 

rule first

when

 a : CrestelRuleModel( $hmap : singleHashMap!=null);

then

 System.out.println(Old Map:  + $hmap);

 HashMap mapp = new HashMap();

 mapp.put(hello, world);

 a.setSingleHashMap(mapp);

 System.out.println(New Map:  + a.getSingleHashMap());

 update(a);

end;

 

When I invoke the rule from my client, the rule is executed infinitely.

 

So, I have placed a drools.halt() before end statement of above rule.
So, it stopped executing infinitely as I wanted. But is it a good practice?

 

Now, I want my input to be filtered by two rules, so I have placed rules
like following:

 

import java.util.HashMap;

 

rule first

when

 a : CrestelRuleModel( $hmap : singleHashMap!=null);

then

 System.out.println(Old Map:  + $hmap);

 HashMap mapp = new HashMap();

 mapp.put(hello, world);

 a.setSingleHashMap(mapp);

 System.out.println(New Map:  + a.getSingleHashMap());

 update(a);

 drools.halt();

end;

 

rule second

when

 b : CrestelRuleModel( $hmap2 : singleHashMap!=null);

then

 System.out.println(Old Map2:  + $hmap2);

 HashMap mapp2 = new HashMap();

 mapp2.put(hello2, world2);

 b.setSingleHashMap(mapp2);

 System.out.println(New Map2:  + b.getSingleHashMap());

 update(b);

 drools.halt();

end;

 

But in above case, only the second  rule executes. What to do in order to
execute both the rules without any infinite loop?

 

Kindly share some pointers on this. Thanks.

 

 

PS: CrestelRuleModel is my POJO model having following fields,

 

public class CrestelRuleModel {

   

   private ArrayList arrayListOfHashMap;

   private HashMap singleHashMap;

   private Object object;

   private String remarks;

 

   //Getters and Setters

 

}

 

Best Regards

Hushen Savani | Crestel Billing

ecTag

 

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Re: [rules-users] Executing more than one rules having no infinite execution

[Esteban Aliverti]

Using drools.halt() is not considered a good practice at all. I would
recommend you to read this post:
http://ilesteban.wordpress.com/2012/11/16/about-drools-and-infinite-execution-loops/

Best Regards,




Esteban Aliverti
- Blog @ http://ilesteban.wordpress.com



On Fri, Dec 7, 2012 at 8:59 AM, Hushen Savani
hushen.sav...@elitecore.comwrote:

  Hi,

 ** **

 I have a simple rule as following:

 ** **

 *import java.util.HashMap;*

 * *

 *rule first*

 *when*

 * a : CrestelRuleModel( $hmap : singleHashMap!=null);*

 *then*

 * System.out.println(Old Map:  + $hmap);*

 * HashMap mapp = new HashMap();*

 * mapp.put(hello, world);*

 * a.setSingleHashMap(mapp);*

 * System.out.println(New Map:  + a.getSingleHashMap());*

 * update(a);*

 *end;*

 ** **

 When I invoke the rule from my client, the rule is executed *infinitely*.*
 ***

 ** **

 So, I have placed a “*drools.halt()*” before “*end*” statement of above
 rule. So, it stopped executing infinitely as I wanted. But *is it a good
 practice?*

 ** **

 Now, I want my input to be filtered by *two rules*, so I have placed
 rules like following:

 ** **

 *import java.util.HashMap;*

 * *

 *rule first*

 *when*

 * a : CrestelRuleModel( $hmap : singleHashMap!=null);*

 *then*

 * System.out.println(Old Map:  + $hmap);*

 * HashMap mapp = new HashMap();*

 * mapp.put(hello, world);*

 * a.setSingleHashMap(mapp);*

 * System.out.println(New Map:  + a.getSingleHashMap());*

 * update(a);*

 * drools.halt();*

 *end;*

 * *

 *rule second*

 *when*

 * b : CrestelRuleModel( $hmap2 : singleHashMap!=null);*

 *then*

 * System.out.println(Old Map2:  + $hmap2);*

 * HashMap mapp2 = new HashMap();*

 * mapp2.put(hello2, world2);*

 * b.setSingleHashMap(mapp2);*

 * System.out.println(New Map2:  + b.getSingleHashMap());*

 * update(b);*

 * drools.halt();*

 *end;*

 ** **

 But in above case, *only the “second”  rule executes*. What to do in
 order to execute both the rules without any infinite loop?

 ** **

 Kindly share some pointers on this. Thanks.

 ** **

 ** **

 *PS*: *CrestelRuleModel* is my POJO model having following fields,

 * *

 *public* *class* CrestelRuleModel {



*private* *ArrayList* arrayListOfHashMap;

*private* *HashMap* singleHashMap;

*private* Object object;

*private* String remarks;

 ** **

//Getters and Setters

 ** **

 }

 ** **

 Best Regards

 *Hushen Savani* | Crestel Billing

 [image: ecTag]

 ** **

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Re: [rules-users] documentation on rules engine and planner

[Geoffrey De Smet]

  
  

Op 07-12-12 08:29, Michiel Vermandel
  schreef:


  Hi,

I would like to read some documentation on how the rules engine
(specifically for planner) works.
I have a number of unanswered questions.

Some type of questions:

- If I have two rules in my drl file, will the engine execute
first the first rule with all possible combinations of the
planning entities matching the conditions of the rule
 and then the second rule with all possible combinations of
the planning entities matching the conditions of the rule
  

the order depends on the rule agenda, see drools expert manual
http://docs.jboss.org/drools/release/5.5.0.Final/drools-expert-docs/html_single/index.html

  - Can I trace which
  rules are executed with what planning-variables and in which
  order
  

You can put System.out.println() in the RHS.
Drools expert does not support TRACE logging to support this for you
currently.
If you would like this, vote for this issue:
 https://issues.jboss.org/browse/JBRULES-3702


  
- What is the purpose of the last variable amount of
parameters ($x, $y, $z) in the RHS logic insertLogical(new
IntConstraintOccurrence( ... , $x, $y ,$z))
  

Those "causes" is to keep Drools Expert's insertLogical's behaviour
happy because an IntConstraintOccurrence's equals/hashcode is
  called so only 1 can be in the working memory.
  Basically, they explain what caused that part of the score. It's
  interesting if you want to use them to explain why a solution has
  a certain score.
  But, on the other hand, it's a PITA and I am working on an
  alternative that's easier to use and faster, once drools expert
  supports ChangeMatchListeners.
  
  In any case, it's a valid issue that the docs don't explain this
  causes thing.


  

  
I know there is
http://docs.jboss.org/drools/release/5.5.0.Final/drools-planner-docs/html_single/index.html
but it does not really answer the above questions.
  

  
Thanks,

  
Michiel
  

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  Follow us at http://twitter.com/#!/Codessentials
  
  
  
  
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Re: [rules-users] documentation on rules engine and planner

[Michiel Vermandel]

Thanks for the explanation, Geoffrey.

I voted for https://issues.jboss.org/browse/JBRULES-3702 and I hope other users 
do so too.
I think it can be very handy for less experienced users (like myself) to get to 
understand how things work.

Concerning the You can put System.out.println() in the RHS., that only shows 
when the then part is invoked.
Sometimes I add a dummy method invoked to my planning entity which always 
returns true and prints all data I want.
I put this method as a condition in the LHS.

Though that is no permanent solution as I do not want to clutter my rules with 
such dummy conditions.

Regards,

Michiel

 
-
http://www.codessentials.com - Your essential software, for free!
Follow us at http://twitter.com/#!/Codessentials



 From: Geoffrey De Smet ge0ffrey.s...@gmail.com
To: Michiel Vermandel mverm...@yahoo.com; Rules Users List 
rules-users@lists.jboss.org 
Sent: Friday, December 7, 2012 9:35 AM
Subject: Re: documentation on rules engine and planner
 



Op 07-12-12 08:29, Michiel Vermandel schreef:

Hi,

I would like to read some documentation on how the rules engine
(specifically for planner) works.
I have a number of unanswered questions.
 
Some type of questions:

- If I have two rules in my drl file, will the engine execute
first the first rule with all possible combinations of the
planning entities matching the conditions of the rule
   and then the second rule with all possible combinations of
the planning entities matching the conditions of the rule

the order depends on the rule agenda, see drools expert manual
http://docs.jboss.org/drools/release/5.5.0.Final/drools-expert-docs/html_single/index.html

- Can I trace which rules are executed with what planning-variables and in 
which order

You can put System.out.println() in the RHS.
Drools expert does not support TRACE logging to support this for you
currently.
If you would like this, vote for this issue:
  https://issues.jboss.org/browse/JBRULES-3702


- What is the purpose of the last variable amount of parameters ($x, $y, $z) in 
the RHS logic insertLogical(new IntConstraintOccurrence( ... , $x, $y ,$z))
Those causes is to keep Drools Expert's insertLogical's behaviour happy 
because an IntConstraintOccurrence's equals/hashcode is called so only 1 can be 
in the working memory.
Basically, they explain what caused that part of the score. It's
  interesting if you want to use them to explain why a solution has
  a certain score.
But, on the other hand, it's a PITA and I am working on an
  alternative that's easier to use and faster, once drools expert
  supports ChangeMatchListeners.

In any case, it's a valid issue that the docs don't explain this
  causes thing.
 


I know there is 
http://docs.jboss.org/drools/release/5.5.0.Final/drools-planner-docs/html_single/index.html 
 but it does not really answer the above questions.



Thanks,


Michiel

 
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Follow us at http://twitter.com/#!/Codessentials


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Re: [rules-users] debug

[Kevin Kelleher]

Guys,

Is there a fix coming for this issue? 

I do not see how we can use 5.5.0 core if the eclipse debugger does not
work.

The mvel workaround does not work for me. Even if it did, I wrote a load of
java dialect rules for 5.3.0 which I don't want to rewrite.

Please advise? Should I stay with 5.3.0? I really want to start our project
with the latest  greatest.

Any thoughts welcome 

Regards,
Kevin



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Re: [rules-users] documentation on rules engine and planner

[Lukáš Petrovický]

Michiel Vermandel píše v Pá 07. 12. 2012 v 01:35 -0800:
 I voted for https://issues.jboss.org/browse/JBRULES-3702 and I hope
 other users do so too.
 I think it can be very handy for less experienced users (like myself)
 to get to understand how things work.

In my opinion, this makes no sense - or, rather, is a subset of
something already implemented. See the KnowledgeRuntimeLogger, which
will produce an audit log of agenda operations. (Which can even be
browsed in a special editor in Eclipse.)

The question remains, how to expose this in Planner - and it is indeed a
valid question. But let's not duplicate already existing functionality -
Drools has known to do this for a long time.

-- 
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QE Lead, JBoss Enterprise BRMS
Phone: +420 532 294 123
irc: lpetrovi, triceo

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Re: [rules-users] documentation on rules engine and planner

[Geoffrey De Smet]

  
  

Op 07-12-12 10:35, Michiel Vermandel
  schreef:


  
Thanks for the explanation, Geoffrey.

  
I voted forhttps://issues.jboss.org/browse/JBRULES-3702
and I hope other users do so too.
I think it can be very
handy for less experienced users (like myself) to get to
understand how things work.

  
Concerning the "You
  can put System.out.println() in the RHS.", that only shows
  when the "then" part is invoked.
Sometimes I add a dummy
  method "invoked" to my planning entity which always returns
  true and prints all data I want.
I put this method as a
  condition in the LHS.

Though that is no permanent
  solution as I do not want to clutter my rules with such dummy
  conditions.
  

That doesn't make much sense to try understand in which order the
patterns match:
Drools expert will try to optimize matching the patterns with as
little as calls as possible.
It's similar to trying to understand how many times HashSet calls
equals() on the objects you add to it:
quite a lot: it depends on load, bucket size, ...

  


Regards,


Michiel


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  free!
  Follow us at http://twitter.com/#!/Codessentials


  
 
 From:
Geoffrey De Smet ge0ffrey.s...@gmail.com
To:
Michiel Vermandel mverm...@yahoo.com; Rules
Users List rules-users@lists.jboss.org 
Sent:
Friday, December 7, 2012 9:35 AM
Subject:
Re: documentation on rules engine and planner
   


   
Op 07-12-12
  08:29, Michiel Vermandel schreef:


  Hi,

I would like to read some documentation on how the
rules engine (specifically for planner) works.
I have a number of unanswered questions.

Some type of questions:

- If I have two rules in my drl file, will the
engine execute first the first rule with all
possible combinations of the planning entities
matching the conditions of the rule
 and then the second rule with all possible
combinations of the planning entities matching the
conditions of the rule
  

the order depends on the rule agenda, see drools expert
manual
http://docs.jboss.org/drools/release/5.5.0.Final/drools-expert-docs/html_single/index.html

  - Can
  I trace which rules are executed with what
  planning-variables and in which order
  

You can put System.out.println() in the RHS.
Drools expert does not support TRACE logging to support
this for you currently.
If you would like this, vote for this issue:
 https://issues.jboss.org/browse/JBRULES-3702


  
- What is the purpose of the last
variable amount of parameters ($x, $y, $z) in
the RHS logic insertLogical(new
IntConstraintOccurrence( ... , $x, $y ,$z))
  

Those "causes" is to keep Drools Expert's
insertLogical's behaviour happy because an IntConstraintOccurrence's
  equals/hashcode is called so only 1 can be in the
  working memory.
  Basically, they explain what caused that part of the
  score. It's interesting if you want to use them to
  explain why a solution has a certain score.
  But, on the other hand, it's a PITA and I am working
  on an alternative that's easier to use and faster,
  once drools expert supports ChangeMatchListeners.
  
  In any case, it's a valid issue that the docs don't
  explain this causes thing.


  

  
I
know there is 

Re: [rules-users] InvalidItemStateException while accessing Guvnor

[Jervis Liu]

On 2012/12/7 2:19, worldofprasanna wrote:
 Hi All ..

 We are getting the following error message in Guvnor when trying to access
 it.

 org.drools.repository.RulesRepositoryException:
 javax.jcr.InvalidItemStateException: property
 /drools:repository/drools:package_area/com.lsi.sort/assets/Lotting
 Guidelines/drools:content: the property cannot be saved because it has been
 modified externally.
Hi, You get this error when one user tries to save the asset with 
changes while the asset has already been changed by another user.

Cheers,
Jervis

 This occurs in our production system and it is occurring rarely (So We
 couldn t reproduce it locally in our environment).

 But this issue is resolved when we restarted the Server in which the Guvnor
 app is running. But this is nearly impossible as this occurs in production
 system.

 We are using Oracle DB as our Persistent Manager (as seen in the attachment)
 and running the guvnor in clustered environment.

 I presume that the issue might be related to versioning in Guvnor ? If so
 can anyone guide us to solve this versioning problem ?

 Herewith attached the repository.xml file.

 Thanks in advance,
 Prasanna Venkataraman.

 repository.xml
 http://drools.46999.n3.nabble.com/file/n4021115/repository.xml



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[rules-users] change polling interval of 60 seconds in KnowledgeBase

[Bacem]

Hello, 

Is it possible to change the polling interval of 60 seconds in
knowledgeAgent ?



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Re: [rules-users] documentation on rules engine and planner

[Geoffrey De Smet]

Op 07-12-12 10:45, Lukáš Petrovický schreef:
 Michiel Vermandel píše v Pá 07. 12. 2012 v 01:35 -0800:
 I voted for https://issues.jboss.org/browse/JBRULES-3702 and I hope
 other users do so too.
 I think it can be very handy for less experienced users (like myself)
 to get to understand how things work.
 In my opinion, this makes no sense - or, rather, is a subset of
 something already implemented. See the KnowledgeRuntimeLogger, which
 will produce an audit log of agenda operations. (Which can even be
 browsed in a special editor in Eclipse.)

 The question remains, how to expose this in Planner - and it is indeed a
 valid question. But let's not duplicate already existing functionality -
 Drools has known to do this for a long time.

Good point that we shouldn't duplicate such functionality.
But I would like to argue that KnowledgeRuntimeLogger is currently 
clunky to enable.
To enable it is a programmatic change, not a configuration change.

I would argue: every Logger should be able to be enabled through normal 
logging configuration (= logback.xml, log4j.xml, ...).
Just like in any other framework (hibernate, weld, spring, ...)

So maybe for 6.0, we can replace KnowledgeRuntimeLogger by normal logging?

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Re: [rules-users] InvalidItemStateException while accessing Guvnor

[Kannan]

I tried replicating this error.I got a valid error message

*Unable to save this asset, as it has been recently updated.*

Is there a way to replicate this?. I am not able to get this error in our
stage environment

Is there any way we can avoid this error (maybe some kind of a retry)

Thanks
Kannan



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Re: [rules-users] change polling interval of 60 seconds in KnowledgeBase

[Wolfgang Laun]

See the javadoc on org.drools.agent.KnowledgeAgentFactory for how to
change the polling interval.

-W


On 07/12/2012, Bacem ghali.ba...@gmail.com wrote:
 Hello,

 Is it possible to change the polling interval of 60 seconds in
 knowledgeAgent ?



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Re: [rules-users] change polling interval of 60 seconds in KnowledgeBase

[Adrián Paredes]

Hi, Bacem:

You can change the polling interval as follows:

ResourceChangeScannerConfiguration sconf =
ResourceFactory.getResourceChangeScannerService().newResourceChangeScannerConfiguration();
sconf.setProperty( drools.resource.scanner.interval, 10 ); // set the
disk scanning interval to 10s
ResourceFactory.getResourceChangeScannerService().configure(sconf);

Greetings,
Adrian

2012/12/7 Wolfgang Laun wolfgang.l...@gmail.com

 See the javadoc on org.drools.agent.KnowledgeAgentFactory for how to
 change the polling interval.

 -W


 On 07/12/2012, Bacem ghali.ba...@gmail.com wrote:
  Hello,
 
  Is it possible to change the polling interval of 60 seconds in
  knowledgeAgent ?
 
 
 
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[rules-users] IntelliFest - Learning the Reason for Failure to Match

[ben.cot...@ms.com]

Did this white paper ever get published at jboss.org?

On 11/5/2012 1:10 PM, Wolfgang Laun wrote:
A White Paper containing a similar sceenario (and other material) will 
be out soon on some RedHat/JBoss site.




From: Wolfgang Laun wolfgang.l...@gmail.com
mailto:wolfgang.l...@gmail.com
To: Rules Users List rules-users@lists.jboss.org
mailto:rules-users@lists.jboss.org,
Date: 11/05/2012 05:19 AM
Subject: Re: [rules-users] DROOLs callback API for L-value
predicatematching events
Sent by: rules-users-boun...@lists.jboss.org
mailto:rules-users-boun...@lists.jboss.org




Learning the reason for failure to match is the title of a
section in my
boot camp you missed at this year's IntelliFest a couple of weeks ago.

You are getting close to the solution, but here's the outline of the
rule programming design pattern:

Write one rule (high salience) to create an auxiliary fact (Aux),
containing a reference to the fact under investigation (Crf) and a
Set.

Write one rule each, combining Aux and Crf, restricting the latter
with one
of the required property values/range. On the RHS, add an
identification to the set component of Aux. DO NOT MODIFY/UPDATE.

Write another rule (low salience) combining Aux and Crf and see what
Aux contains in the Set. Retract Aux.

-W




On 05/11/2012, Cotton, Ben ben.cot...@morganstanley.com
mailto:ben.cot...@morganstanley.com wrote:
 Could a solution be as simple as this?  Is this approach to
consuming
 LCHUS_IRS_CURRENCY_RULE L-value matching events sound/complete
(and
 not-vulnerable to any race condition?).  Is there any DROOLS
EventListener
 callback API that would be more appropriate to solve the problem?

 E.g.  I want to be able to log when each of these 5 L-value
predicates
 either MATCHES or FAILS TO MATCH (at the time of the event)

 rule LCHUS_IRS_CURRENCY_RULE  //XLS Item=195
 when
IRDCurrencyRuleFact(
 productType == IRS,
 currency==GBP,
 upfrontFeePaymentDate  IRDCurrencyRuleFact.terminationDate,
 maturity = 18275,
  //unit = days, i.e. 50 Years
 notional = 99,999,999,999.99
   //max Notional
)
 then
   System.out.println(LCHUS);
 end


 Again the objective is to be able to join a high-resolution logging
 capability wrt to which of the specific 5 L-value predicates
matched.
 Instinctively, to this DROOLs newbie, this approach seems
workable but not
 ideal 

 rule LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_1
 when
IRDCurrencyRuleFact(productType == IRS)
then
  System.out.println(LCHUS_IRS_CURRENCY_RULE_L-value event 1
 match);  //log event  L-value predicate 1 matched
 end

 rule LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_2
 when
IRDCurrencyRuleFact(currency==GBP)
then
  System.out.println(LCHUS_IRS_CURRENCY_RULE_L-value event 2
 match); //log event  L-value predicate 2 matched
 end

 rule LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_3
 when
 IRDCurrencyRuleFact(upfrontFeePaymentDate 
 IRDCurrencyRuleFact.terminationDate)
 then
  System.out.println(LCHUS_IRS_CURRENCY_RULE_L-value event 3
 match); //log event  L-value predicate 3 matched
 end

 rule LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_4
 when
 IRDCurrencyRuleFact(maturity = 18275)
 then
  System.out.println(LCHUS_IRS_CURRENCY_RULE_L-value event 4
 match); //log event  L-value predicate 4 matched
 end

 rule LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_5
 when
 IRDCurrencyRuleFact(notional = 99,999,999,999.99)
 then
  System.out.println(LCHUS_IRS_CURRENCY_RULE_L-value event 5
 match); //log event  L-value predicate 5 matched
 end





 Ben D Cotton III
 Morgan Stanley  Co.
 OTC Derivatives Clearing Technology
 1221 AOTA Rockefeller Ctr - Flr 27
 New York, NY 10020
 (212)762.9094 tel:%28212%29762.9094
 ben.cot...@ms.com
mailto:ben.cot...@ms.commailto:ben.cot...@ms.com




 From: rules-users-boun...@lists.jboss.org
mailto:rules-users-boun...@lists.jboss.org
 [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of
Cotton, Ben
 (ISGT)
 Sent: Saturday, November 03, 2012 8:24 AM
 To: rules-users@lists.jboss.org mailto:rules-users@lists.jboss.org
 Cc: O'Brien, Patrick (ISGT)
 Subject: [rules-users] DROOLs callback API for L-value predicate
matching
 events

 Hi,  Can someone please point me to 

[rules-users] A basic doubt about Drools Fusion

[Adrián Paredes]

Hi all:

I have a very basic doubt about Drools Fusion.

I have two simple Java classes:

EventA  {
String id;
Date timestamp;
Long duration;
}

EventB {
String id;
Date timestamp;
Long duration;
}

I have a DRL file, where I declare this two classes as Events:

declare EventA
@role(event)
@timestamp(timestamp)
@duration(duration)
end

declare EventB
@role(event)
@timestamp(timestamp)
@duration(duration)
end

I have a simple rule:

rule Basic Rule
dialect 'mvel'
when
$eventA: EventA($aId: id) from entry-point time stream
then
System.out.println(Event A  + $aId +  at  + $eventA.timestamp);
end

Finally, I have a test that starts a StatefulKnowledgeSession in STREAM
mode, register an eventLister in the session in order to fire the rules
when an event arrives:

ksession.addEventListener(new DefaultAgendaEventListener() {
@Override
public void activationCreated(ActivationCreatedEvent event) {
((StatefulKnowledgeSession)
event.getKnowledgeRuntime()).fireAllRules();
}
});

And then the test insert in the time stream entry-point an instance of
EventA with duration of 10 miliseconds, as follows:

EventA eventA = new EventA();
eventA.setId(123);
eventA.setTimestamp(new Date());
eventA.setDuration(10L);
ksession.getWorkingMemoryEntryPoint(time stream).insert(event);

At the end of the test, I have an sleep of 2 seconds just in case.

I don't understand why the Basic Rule never fires.

But if I add another condition to the same rule, something like this:

rule Basic Rule
dialect 'mvel'
when
$eventA: EventA($aId: id) from entry-point time stream
not EventB($aId == id, this after [0s,5s] $eventA) from entry-point
time stream
then
System.out.println(Event A  + $aId +  at  + $eventA.timestamp);
end

The rules fires and I see this message in console:

Event A 123 at Fri Dec 07 09:48:59 ART 2012

I don't understand why the first rule, that is more open, don't fire, and
the second rule, that is more restrictive, fires without problems.

Thank you very much!

Greetings,
Adrian.

-- 
*Epidata Consulting | Deploying Ideas
Ing. Adrián M. Paredes | Arquitecto Desarrollador
adri...@epidataconsulting.com | Cel: (54911) 3297 1713

Argentina: Maipú 521 Piso 1 Of. A | Buenos Aires | Of: (5411) 5031 0060
Chile: Apoquindo 3600 Piso 7 y 9 | Las Condes - Santiago | Of: (+56) 2 495
8450
---
 www.epidataconsulting.com
 Linkedin http://bit.ly/epidatalinkedin |
Facebookhttp://www.facebook.com/epidata.consulting
 | Twitter http://twitter.com/epidata
*
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rules-users mailing list
rules-users@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users

Re: [rules-users] A basic doubt about Drools Fusion

[Esteban Aliverti]

It could be the case, and I'm guessing here, that the AgendaEventListener
is called just before the activation is placed into the agenda. So, the
call to fireAllRules() finds an empty agenda. What you could do to check if
this is what is happening, is to insert 2 EvenA objects. The second call of
fireAllRules() should fire the activation of the first object (and you will
miss the activation of the second).

Best Regards,






Esteban Aliverti
- Blog @ http://ilesteban.wordpress.com



On Fri, Dec 7, 2012 at 1:55 PM, Adrián Paredes 
adri...@epidataconsulting.com wrote:

 Hi all:

 I have a very basic doubt about Drools Fusion.

 I have two simple Java classes:

 EventA  {
 String id;
 Date timestamp;
 Long duration;
 }

 EventB {
 String id;
 Date timestamp;
 Long duration;
 }

 I have a DRL file, where I declare this two classes as Events:

 declare EventA
 @role(event)
 @timestamp(timestamp)
 @duration(duration)
 end

 declare EventB
 @role(event)
 @timestamp(timestamp)
 @duration(duration)
 end

 I have a simple rule:

 rule Basic Rule
 dialect 'mvel'
 when
 $eventA: EventA($aId: id) from entry-point time stream
 then
 System.out.println(Event A  + $aId +  at  + $eventA.timestamp);
 end

 Finally, I have a test that starts a StatefulKnowledgeSession in STREAM
 mode, register an eventLister in the session in order to fire the rules
 when an event arrives:

 ksession.addEventListener(new DefaultAgendaEventListener() {
 @Override
 public void activationCreated(ActivationCreatedEvent event) {
 ((StatefulKnowledgeSession)
 event.getKnowledgeRuntime()).fireAllRules();
 }
 });

 And then the test insert in the time stream entry-point an instance of
 EventA with duration of 10 miliseconds, as follows:

 EventA eventA = new EventA();
 eventA.setId(123);
 eventA.setTimestamp(new Date());
 eventA.setDuration(10L);
 ksession.getWorkingMemoryEntryPoint(time stream).insert(event);

 At the end of the test, I have an sleep of 2 seconds just in case.

 I don't understand why the Basic Rule never fires.

 But if I add another condition to the same rule, something like this:

 rule Basic Rule
 dialect 'mvel'
 when
 $eventA: EventA($aId: id) from entry-point time stream
 not EventB($aId == id, this after [0s,5s] $eventA) from entry-point
 time stream
 then
 System.out.println(Event A  + $aId +  at  + $eventA.timestamp);
 end

 The rules fires and I see this message in console:

 Event A 123 at Fri Dec 07 09:48:59 ART 2012

 I don't understand why the first rule, that is more open, don't fire, and
 the second rule, that is more restrictive, fires without problems.

 Thank you very much!

 Greetings,
 Adrian.

 --
 *Epidata Consulting | Deploying Ideas
 Ing. Adrián M. Paredes | Arquitecto Desarrollador
 adri...@epidataconsulting.com | Cel: (54911) 3297 1713

 
 Argentina: Maipú 521 Piso 1 Of. A | Buenos Aires | Of: (5411) 5031 0060
 Chile: Apoquindo 3600 Piso 7 y 9 | Las Condes - Santiago | Of: (+56) 2
 495 8450

 ---
  www.epidataconsulting.com
  Linkedin http://bit.ly/epidatalinkedin | 
 Facebookhttp://www.facebook.com/epidata.consulting
  | Twitter http://twitter.com/epidata
 *

 ___
 rules-users mailing list
 rules-users@lists.jboss.org
 https://lists.jboss.org/mailman/listinfo/rules-users


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Re: [rules-users] Drools + Semantic Web : EulerGUI

[Jean-Marc Vanel]

It's too bad indeed !
I've looked for a rules, BPMS, inference, IA, Meetup in London, but found
none .
I can be here longer.
I may move my meeup to attend yours.

JMV

2012/12/7 Mauricio Salatino sala...@gmail.com

 Hi Jean-Marc,
 Ouch! I will be doing a jBPM5 and Drools talk at the same time the same
 day in the same city! I would love to go and see your talk, I guess that I
 will miss that this time. Are you going to be around later this week? we
 can probably arrange to meet. Is the content of the talk gonna be published
 online somewhere?


 On Fri, Dec 7, 2012 at 12:53 PM, Jean-Marc Vanel jeanmarc.va...@gmail.com
  wrote:

 Hi London Drools users !

 I come to London.
 I'm available for a talk about what I do with Drools + Semantic Web +
 Controlled English with EulerGUI [1].
 I've set a Meetup in London on dec. 12, in need of a location :
 http://www.meetup.com/LondonSWGroup/events/94447932/

 First I'll be in Oxford from today to tuesday at AGI (Artificial General
 Intelligence) conference [2] . The thread for me there will be how can an
 agent learn from its experience? .

 [1]
 http://eulergui.svn.sourceforge.net/viewvc/eulergui/trunk/eulergui/html/documentation.html#L5890
 [2] http://agi-conference.org/2012/
 [3] http://www.meetup.com/LondonSWGroup/events/94447932/

 --
 Jean-Marc Vanel
 Déductions SARL - Consulting, services, training,
 Rule-based programming, Semantic Web
 http://deductions-software.com/
 +33 (0)6 89 16 29 52
 chat :  irc://irc.freenode.net#eulergui

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  - Co-Founder @ http://www.jugargentina.org
  - Co-Founder @ http://www.jbug.com.ar

  - Salatino Salaboy Mauricio -


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 rules-users mailing list
 rules-users@lists.jboss.org
 https://lists.jboss.org/mailman/listinfo/rules-users




-- 
Jean-Marc Vanel
Déductions SARL - Consulting, services, training,
Rule-based programming, Semantic Web
http://deductions-software.com/
+33 (0)6 89 16 29 52
chat :  irc://irc.freenode.net#eulergui
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Re: [rules-users] Drools + Semantic Web : EulerGUI

[Mauricio Salatino]

If you do that it will be great.. so we can both attend to each others
meetup.
I'm really interested in the EulerGUI tool, I've being looking at it since
it started
Cheers


On Fri, Dec 7, 2012 at 1:40 PM, Jean-Marc Vanel jeanmarc.va...@gmail.comwrote:

 It's too bad indeed !
 I've looked for a rules, BPMS, inference, IA, Meetup in London, but found
 none .
 I can be here longer.
 I may move my meeup to attend yours.

 JMV

 2012/12/7 Mauricio Salatino sala...@gmail.com

 Hi Jean-Marc,
 Ouch! I will be doing a jBPM5 and Drools talk at the same time the same
 day in the same city! I would love to go and see your talk, I guess that I
 will miss that this time. Are you going to be around later this week? we
 can probably arrange to meet. Is the content of the talk gonna be published
 online somewhere?


 On Fri, Dec 7, 2012 at 12:53 PM, Jean-Marc Vanel 
 jeanmarc.va...@gmail.com wrote:

 Hi London Drools users !

 I come to London.
 I'm available for a talk about what I do with Drools + Semantic Web +
 Controlled English with EulerGUI [1].
 I've set a Meetup in London on dec. 12, in need of a location :
 http://www.meetup.com/LondonSWGroup/events/94447932/

 First I'll be in Oxford from today to tuesday at AGI (Artificial General
 Intelligence) conference [2] . The thread for me there will be how can an
 agent learn from its experience? .

 [1]
 http://eulergui.svn.sourceforge.net/viewvc/eulergui/trunk/eulergui/html/documentation.html#L5890
 [2] http://agi-conference.org/2012/
 [3] http://www.meetup.com/LondonSWGroup/events/94447932/

 --
 Jean-Marc Vanel
 Déductions SARL - Consulting, services, training,
 Rule-based programming, Semantic Web
 http://deductions-software.com/
 +33 (0)6 89 16 29 52
 chat :  irc://irc.freenode.net#eulergui

 ___
 rules-users mailing list
 rules-users@lists.jboss.org
 https://lists.jboss.org/mailman/listinfo/rules-users




 --
  - MyJourney @ http://salaboy.wordpress.com
  - Co-Founder @ http://www.jugargentina.org
  - Co-Founder @ http://www.jbug.com.ar

  - Salatino Salaboy Mauricio -


 ___
 rules-users mailing list
 rules-users@lists.jboss.org
 https://lists.jboss.org/mailman/listinfo/rules-users




 --
 Jean-Marc Vanel
 Déductions SARL - Consulting, services, training,
 Rule-based programming, Semantic Web
 http://deductions-software.com/
 +33 (0)6 89 16 29 52
 chat :  irc://irc.freenode.net#eulergui

 ___
 rules-users mailing list
 rules-users@lists.jboss.org
 https://lists.jboss.org/mailman/listinfo/rules-users




-- 
 - MyJourney @ http://salaboy.wordpress.com
 - Co-Founder @ http://www.jugargentina.org
 - Co-Founder @ http://www.jbug.com.ar

 - Salatino Salaboy Mauricio -
___
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Re: [rules-users] A basic doubt about Drools Fusion

[Adrián Paredes]

Thank you, Esteban.

You are right! If I insert two events A:

rulesTest.addEventA(123);
rulesTest.addEventA(456);

The second call of fireAllRules() activates the rule for the first object:

Event inserted com.epidataconsulting.drools.model.EventA
Event A 123 at Fri Dec 07 11:54:21 ART 2012
Event inserted com.epidataconsulting.drools.model.EventA

But not for the second.

How I can do to correct this behavior?

Thanks!

Adrian

2012/12/7 Esteban Aliverti esteban.alive...@gmail.com

 It could be the case, and I'm guessing here, that the AgendaEventListener
 is called just before the activation is placed into the agenda. So, the
 call to fireAllRules() finds an empty agenda. What you could do to check if
 this is what is happening, is to insert 2 EvenA objects. The second call of
 fireAllRules() should fire the activation of the first object (and you will
 miss the activation of the second).

 Best Regards,




 

 Esteban Aliverti
 - Blog @ http://ilesteban.wordpress.com



 On Fri, Dec 7, 2012 at 1:55 PM, Adrián Paredes 
 adri...@epidataconsulting.com wrote:

 Hi all:

 I have a very basic doubt about Drools Fusion.

 I have two simple Java classes:

 EventA  {
 String id;
 Date timestamp;
 Long duration;
 }

 EventB {
 String id;
 Date timestamp;
 Long duration;
 }

 I have a DRL file, where I declare this two classes as Events:

 declare EventA
 @role(event)
 @timestamp(timestamp)
 @duration(duration)
 end

 declare EventB
 @role(event)
 @timestamp(timestamp)
 @duration(duration)
 end

 I have a simple rule:

 rule Basic Rule
 dialect 'mvel'
 when
 $eventA: EventA($aId: id) from entry-point time stream
 then
 System.out.println(Event A  + $aId +  at  + $eventA.timestamp);
 end

 Finally, I have a test that starts a StatefulKnowledgeSession in STREAM
 mode, register an eventLister in the session in order to fire the rules
 when an event arrives:

 ksession.addEventListener(new DefaultAgendaEventListener() {
 @Override
 public void activationCreated(ActivationCreatedEvent event) {
 ((StatefulKnowledgeSession)
 event.getKnowledgeRuntime()).fireAllRules();
 }
 });

 And then the test insert in the time stream entry-point an instance of
 EventA with duration of 10 miliseconds, as follows:

 EventA eventA = new EventA();
 eventA.setId(123);
 eventA.setTimestamp(new Date());
 eventA.setDuration(10L);
 ksession.getWorkingMemoryEntryPoint(time stream).insert(event);

 At the end of the test, I have an sleep of 2 seconds just in case.

 I don't understand why the Basic Rule never fires.

 But if I add another condition to the same rule, something like this:

 rule Basic Rule
 dialect 'mvel'
 when
 $eventA: EventA($aId: id) from entry-point time stream
 not EventB($aId == id, this after [0s,5s] $eventA) from entry-point
 time stream
 then
 System.out.println(Event A  + $aId +  at  + $eventA.timestamp);
 end

 The rules fires and I see this message in console:

 Event A 123 at Fri Dec 07 09:48:59 ART 2012

 I don't understand why the first rule, that is more open, don't fire, and
 the second rule, that is more restrictive, fires without problems.

 Thank you very much!

 Greetings,
 Adrian.

 --
 *Epidata Consulting | Deploying Ideas
 Ing. Adrián M. Paredes | Arquitecto Desarrollador
 adri...@epidataconsulting.com | Cel: (54911) 3297 1713

 
 Argentina: Maipú 521 Piso 1 Of. A | Buenos Aires | Of: (5411) 5031 0060
 Chile: Apoquindo 3600 Piso 7 y 9 | Las Condes - Santiago | Of: (+56) 2
 495 8450

 ---
  www.epidataconsulting.com
  Linkedin http://bit.ly/epidatalinkedin | 
 Facebookhttp://www.facebook.com/epidata.consulting
  | Twitter http://twitter.com/epidata
 *

 ___
 rules-users mailing list
 rules-users@lists.jboss.org
 https://lists.jboss.org/mailman/listinfo/rules-users



 ___
 rules-users mailing list
 rules-users@lists.jboss.org
 https://lists.jboss.org/mailman/listinfo/rules-users




-- 
*Epidata Consulting | Deploying Ideas
Ing. Adrián M. Paredes | Arquitecto Desarrollador
adri...@epidataconsulting.com | Cel: (54911) 3297 1713

Argentina: Maipú 521 Piso 1 Of. A | Buenos Aires | Of: (5411) 5031 0060
Chile: Apoquindo 3600 Piso 7 y 9 | Las Condes - Santiago | Of: (+56) 2 495
8450
---
 www.epidataconsulting.com
 Linkedin http://bit.ly/epidatalinkedin |
Facebookhttp://www.facebook.com/epidata.consulting
 | Twitter 

Re: [rules-users] A basic doubt about Drools Fusion

[Esteban Aliverti]

I think you have 2 main options here:

   - Invoke fireUnitlHalt() in an independent thread.
   - Invoke fireAllRules() after each insert() you have.

Best Regards,





Esteban Aliverti
- Blog @ http://ilesteban.wordpress.com



On Fri, Dec 7, 2012 at 3:57 PM, Adrián Paredes 
adri...@epidataconsulting.com wrote:

 Thank you, Esteban.

 You are right! If I insert two events A:

 rulesTest.addEventA(123);
 rulesTest.addEventA(456);

 The second call of fireAllRules() activates the rule for the first object:

 Event inserted com.epidataconsulting.drools.model.EventA
 Event A 123 at Fri Dec 07 11:54:21 ART 2012
 Event inserted com.epidataconsulting.drools.model.EventA

 But not for the second.

 How I can do to correct this behavior?

 Thanks!

 Adrian


 2012/12/7 Esteban Aliverti esteban.alive...@gmail.com

 It could be the case, and I'm guessing here, that the AgendaEventListener
 is called just before the activation is placed into the agenda. So, the
 call to fireAllRules() finds an empty agenda. What you could do to check if
 this is what is happening, is to insert 2 EvenA objects. The second call of
 fireAllRules() should fire the activation of the first object (and you will
 miss the activation of the second).

 Best Regards,




 

 Esteban Aliverti
 - Blog @ http://ilesteban.wordpress.com



 On Fri, Dec 7, 2012 at 1:55 PM, Adrián Paredes 
 adri...@epidataconsulting.com wrote:

 Hi all:

 I have a very basic doubt about Drools Fusion.

 I have two simple Java classes:

 EventA  {
 String id;
 Date timestamp;
 Long duration;
 }

 EventB {
 String id;
 Date timestamp;
 Long duration;
 }

 I have a DRL file, where I declare this two classes as Events:

 declare EventA
 @role(event)
 @timestamp(timestamp)
 @duration(duration)
 end

 declare EventB
 @role(event)
 @timestamp(timestamp)
 @duration(duration)
 end

 I have a simple rule:

 rule Basic Rule
 dialect 'mvel'
 when
 $eventA: EventA($aId: id) from entry-point time stream
 then
 System.out.println(Event A  + $aId +  at  + $eventA.timestamp);
 end

 Finally, I have a test that starts a StatefulKnowledgeSession in STREAM
 mode, register an eventLister in the session in order to fire the rules
 when an event arrives:

 ksession.addEventListener(new DefaultAgendaEventListener() {
 @Override
 public void activationCreated(ActivationCreatedEvent event) {
 ((StatefulKnowledgeSession)
 event.getKnowledgeRuntime()).fireAllRules();
 }
 });

 And then the test insert in the time stream entry-point an instance of
 EventA with duration of 10 miliseconds, as follows:

 EventA eventA = new EventA();
 eventA.setId(123);
 eventA.setTimestamp(new Date());
 eventA.setDuration(10L);
 ksession.getWorkingMemoryEntryPoint(time stream).insert(event);

 At the end of the test, I have an sleep of 2 seconds just in case.

 I don't understand why the Basic Rule never fires.

 But if I add another condition to the same rule, something like this:

 rule Basic Rule
 dialect 'mvel'
 when
 $eventA: EventA($aId: id) from entry-point time stream
 not EventB($aId == id, this after [0s,5s] $eventA) from entry-point
 time stream
 then
 System.out.println(Event A  + $aId +  at  + $eventA.timestamp);
 end

 The rules fires and I see this message in console:

 Event A 123 at Fri Dec 07 09:48:59 ART 2012

 I don't understand why the first rule, that is more open, don't fire,
 and the second rule, that is more restrictive, fires without problems.

 Thank you very much!

 Greetings,
 Adrian.

 --
 *Epidata Consulting | Deploying Ideas
 Ing. Adrián M. Paredes | Arquitecto Desarrollador
 adri...@epidataconsulting.com | Cel: (54911) 3297 1713

 
 Argentina: Maipú 521 Piso 1 Of. A | Buenos Aires | Of: (5411) 5031 0060
 Chile: Apoquindo 3600 Piso 7 y 9 | Las Condes - Santiago | Of: (+56) 2
 495 8450

 ---
  www.epidataconsulting.com
  Linkedin http://bit.ly/epidatalinkedin | 
 Facebookhttp://www.facebook.com/epidata.consulting
  | Twitter http://twitter.com/epidata
 *

 ___
 rules-users mailing list
 rules-users@lists.jboss.org
 https://lists.jboss.org/mailman/listinfo/rules-users



 ___
 rules-users mailing list
 rules-users@lists.jboss.org
 https://lists.jboss.org/mailman/listinfo/rules-users




 --
 *Epidata Consulting | Deploying Ideas
 Ing. Adrián M. Paredes | Arquitecto Desarrollador
 adri...@epidataconsulting.com | Cel: (54911) 3297 1713

 
 Argentina: Maipú 521 Piso 1 Of. A 

Re: [rules-users] A basic doubt about Drools Fusion

[Mauricio Salatino]

There should be a listener for afterActivationCreated, right?


On Fri, Dec 7, 2012 at 3:16 PM, Esteban Aliverti esteban.alive...@gmail.com
 wrote:

 I think you have 2 main options here:

- Invoke fireUnitlHalt() in an independent thread.
- Invoke fireAllRules() after each insert() you have.

 Best Regards,



 

 Esteban Aliverti
 - Blog @ http://ilesteban.wordpress.com



 On Fri, Dec 7, 2012 at 3:57 PM, Adrián Paredes 
 adri...@epidataconsulting.com wrote:

 Thank you, Esteban.

 You are right! If I insert two events A:

 rulesTest.addEventA(123);
 rulesTest.addEventA(456);

 The second call of fireAllRules() activates the rule for the first object:

 Event inserted com.epidataconsulting.drools.model.EventA
 Event A 123 at Fri Dec 07 11:54:21 ART 2012
 Event inserted com.epidataconsulting.drools.model.EventA

 But not for the second.

 How I can do to correct this behavior?

 Thanks!

 Adrian


 2012/12/7 Esteban Aliverti esteban.alive...@gmail.com

 It could be the case, and I'm guessing here, that the
 AgendaEventListener is called just before the activation is placed into the
 agenda. So, the call to fireAllRules() finds an empty agenda. What you
 could do to check if this is what is happening, is to insert 2 EvenA
 objects. The second call of fireAllRules() should fire the activation of
 the first object (and you will miss the activation of the second).

 Best Regards,




 

 Esteban Aliverti
 - Blog @ http://ilesteban.wordpress.com



 On Fri, Dec 7, 2012 at 1:55 PM, Adrián Paredes 
 adri...@epidataconsulting.com wrote:

 Hi all:

 I have a very basic doubt about Drools Fusion.

 I have two simple Java classes:

 EventA  {
 String id;
 Date timestamp;
 Long duration;
 }

 EventB {
 String id;
 Date timestamp;
 Long duration;
 }

 I have a DRL file, where I declare this two classes as Events:

 declare EventA
 @role(event)
 @timestamp(timestamp)
 @duration(duration)
 end

 declare EventB
 @role(event)
 @timestamp(timestamp)
 @duration(duration)
 end

 I have a simple rule:

 rule Basic Rule
 dialect 'mvel'
 when
 $eventA: EventA($aId: id) from entry-point time stream
 then
 System.out.println(Event A  + $aId +  at  + $eventA.timestamp);
 end

 Finally, I have a test that starts a StatefulKnowledgeSession in STREAM
 mode, register an eventLister in the session in order to fire the rules
 when an event arrives:

 ksession.addEventListener(new DefaultAgendaEventListener() {
 @Override
 public void activationCreated(ActivationCreatedEvent event) {
 ((StatefulKnowledgeSession)
 event.getKnowledgeRuntime()).fireAllRules();
 }
 });

 And then the test insert in the time stream entry-point an instance
 of EventA with duration of 10 miliseconds, as follows:

 EventA eventA = new EventA();
 eventA.setId(123);
 eventA.setTimestamp(new Date());
 eventA.setDuration(10L);
 ksession.getWorkingMemoryEntryPoint(time stream).insert(event);

 At the end of the test, I have an sleep of 2 seconds just in case.

 I don't understand why the Basic Rule never fires.

 But if I add another condition to the same rule, something like this:

 rule Basic Rule
 dialect 'mvel'
 when
 $eventA: EventA($aId: id) from entry-point time stream
 not EventB($aId == id, this after [0s,5s] $eventA) from entry-point
 time stream
 then
 System.out.println(Event A  + $aId +  at  + $eventA.timestamp);
 end

 The rules fires and I see this message in console:

 Event A 123 at Fri Dec 07 09:48:59 ART 2012

 I don't understand why the first rule, that is more open, don't fire,
 and the second rule, that is more restrictive, fires without problems.

 Thank you very much!

 Greetings,
 Adrian.

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 *Epidata Consulting | Deploying Ideas
 Ing. Adrián M. Paredes | Arquitecto Desarrollador
 adri...@epidataconsulting.com | Cel: (54911) 3297 1713

 
 Argentina: Maipú 521 Piso 1 Of. A | Buenos Aires | Of: (5411) 5031 0060
 Chile: Apoquindo 3600 Piso 7 y 9 | Las Condes - Santiago | Of: (+56) 2
 495 8450

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 *Epidata Consulting | Deploying Ideas
 Ing. Adrián M. Paredes | Arquitecto Desarrollador
 adri...@epidataconsulting.com | Cel: (54911) 3297 1713

 

Re: [rules-users] Drools + Semantic Web : EulerGUI

[kurrent93]

Hi Jean-Marc

Unfortunately I cannot attend - but I would love to. I'm very interested to
hear what you have to say, and to see your presentation.

If it is possible, please record the event. 

Also, if you are ever in Denmark, let me know - I would appreciate learning
more.

Kind regards
Anton



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Re: [rules-users] IntelliFest - Learning the Reason for Failure to Match

[Mark Proctor]

It will be published soon.

Big thanks to wolfgang for his excellent work.

Mark
On 7 Dec 2012, at 12:52, ben.cot...@ms.com ben.cot...@morganstanley.com wrote:

 
 Did this white paper ever get published at jboss.org?
 
 On 11/5/2012 1:10 PM, Wolfgang Laun wrote:
 A White Paper containing a similar sceenario (and other material) will be 
 out soon on some RedHat/JBoss site.
 
 
 
 From:Wolfgang Laun wolfgang.l...@gmail.com 
 To:Rules Users List rules-users@lists.jboss.org, 
 Date:11/05/2012 05:19 AM 
 Subject:Re: [rules-users] DROOLs callback API for L-value predicate  
   matching events 
 Sent by:rules-users-boun...@lists.jboss.org 
 
 
 
 Learning the reason for failure to match is the title of a section in my
 boot camp you missed at this year's IntelliFest a couple of weeks ago.
 
 You are getting close to the solution, but here's the outline of the
 rule programming design pattern:
 
 Write one rule (high salience) to create an auxiliary fact (Aux),
 containing a reference to the fact under investigation (Crf) and a
 Set.
 
 Write one rule each, combining Aux and Crf, restricting the latter with one
 of the required property values/range. On the RHS, add an
 identification to the set component of Aux. DO NOT MODIFY/UPDATE.
 
 Write another rule (low salience) combining Aux and Crf and see what
 Aux contains in the Set. Retract Aux.
 
 -W
 
 
 
 
 On 05/11/2012, Cotton, Ben ben.cot...@morganstanley.com wrote:
  Could a solution be as simple as this?  Is this approach to consuming
  LCHUS_IRS_CURRENCY_RULE L-value matching events sound/complete (and
  not-vulnerable to any race condition?).  Is there any DROOLS EventListener
  callback API that would be more appropriate to solve the problem?
 
  E.g.  I want to be able to log when each of these 5 L-value predicates
  either MATCHES or FAILS TO MATCH (at the time of the event)
 
  rule LCHUS_IRS_CURRENCY_RULE  //XLS Item=195
  when
 IRDCurrencyRuleFact(
  productType == IRS,
  currency==GBP,
  upfrontFeePaymentDate  IRDCurrencyRuleFact.terminationDate,
  maturity = 18275,
   //unit = days, i.e. 50 Years
  notional = 99,999,999,999.99
//max Notional
 )
  then
System.out.println(LCHUS);
  end
 
 
  Again the objective is to be able to join a high-resolution logging
  capability wrt to which of the specific 5 L-value predicates matched.
  Instinctively, to this DROOLs newbie, this approach seems workable but not
  ideal 
 
  rule LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_1
  when
 IRDCurrencyRuleFact(productType == IRS)
 then
   System.out.println(LCHUS_IRS_CURRENCY_RULE_L-value event 
  1
  match);  //log event  L-value predicate 1 matched
  end
 
  rule LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_2
  when
 IRDCurrencyRuleFact(currency==GBP)
 then
   System.out.println(LCHUS_IRS_CURRENCY_RULE_L-value event 
  2
  match); //log event  L-value predicate 2 matched
  end
 
  rule LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_3
  when
  IRDCurrencyRuleFact(upfrontFeePaymentDate 
  IRDCurrencyRuleFact.terminationDate)
  then
   System.out.println(LCHUS_IRS_CURRENCY_RULE_L-value event 
  3
  match); //log event  L-value predicate 3 matched
  end
 
  rule LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_4
  when
  IRDCurrencyRuleFact(maturity = 18275)
  then
   System.out.println(LCHUS_IRS_CURRENCY_RULE_L-value event 
  4
  match); //log event  L-value predicate 4 matched
  end
 
  rule LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_5
  when
  IRDCurrencyRuleFact(notional = 99,999,999,999.99)
  then
   System.out.println(LCHUS_IRS_CURRENCY_RULE_L-value event 
  5
  match); //log event  L-value predicate 5 matched
  end
 
 
 
 
 
  Ben D Cotton III
  Morgan Stanley  Co.
  OTC Derivatives Clearing Technology
  1221 AOTA Rockefeller Ctr - Flr 27
  New York, NY 10020
  (212)762.9094
  ben.cot...@ms.commailto:ben.cot...@ms.com
 
 
 
 
  From: rules-users-boun...@lists.jboss.org
  [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Cotton, Ben
  (ISGT)
  Sent: Saturday, November 03, 2012 8:24 AM
  To: rules-users@lists.jboss.org
  Cc: O'Brien, Patrick (ISGT)
  Subject: [rules-users] DROOLs callback API for L-value predicate matching
  events
 
  Hi,  Can someone please point me to compelling examples/sample code  of how
  to use a DROOLs callback API for very high-resolution logging of L-value
  predicate matching events?
 
  E.g.  I want to be able to log when each of these 5 L-value predicates
  either MATCHES or FAILS TO MATCH (at the time of the event)
 
  rule LCHUS_IRS_CURRENCY_RULE  //XLS Item=195
  when
 IRDCurrencyRuleFact(
  productType == IRS,
  

[rules-users] Is Drools suitable for preprocessing my Resource Allocation Problem

[Raphael Jolivet]

Hello,

Here is a copy of a question I just sent on Stackoverflow :
http://stackoverflow.com/questions/13753983/is-drools-suitable-for-preprocessing-a-resource-allocation-problem

I have a quite big resource allocation problem to compute.

I have just discovered Drools and I would like to know if it is a good
candidate to work as a preprocessor and generate a list of forbidden
allocations, based on some user rules.

The ProblemI have an optimisation engine that can allocate some activities
to some resources, while optimizing some KPIs (Key Performance Indicator).

The optimizer takes as input (among others) a list of forbiden allocations
that should be generated based on some user-provided rules.

Each forbid rule is an AND composition of two rules:

One for the activity
One for the resource
Each sub rule is itself a list of AND tests on some attributes.

Here is the structure of one rule, in Pseudo-Code

Rule1:
* ActivityRule
  * activity.prop1 == foo AND
  * activity.prop2 == bar AND
  * ...
* ResourceRule
  * resource.prop3 == foobar AND
  * resource.prop4 == NULL AND
  * ...

Rule2:
   ...


As soon as a pair of [Activity,Resource] matches one rule, it should be
sent as output, and not tested again against other rules.

Also, this is important to note that some rules will match very often,
while overs will match very rarely (very specific cases).

Performance constraints
Here are some rough hints about the volumetry of the problem :
* 1000 activities
* 200 resources
* 50 rules

I need the forbidden allocations to be generated in under a minute.

The challengeAs far, as I understand, Drools can surely generate those
forbidden allocations. the question is : How smart is he ?

If I had to write an engine myself for this particular problem, I would
make some improvements :

For example, I would not generate all possible allocations (200.000) and
then try to apply each rule on it (50 rules x 200.000).

Instead, I would try to match the resources and the activities separately
on each rule (each side of the rule), and then assemble the couples that
match at least one common rule.

Also, I would add some counter on each rule that would auto increment upon
each match, in order to apply first the rules that match often.

QuestionsIs the engine of Drools smart enought for that ? Or is he even
smarter ?
Do you have an example of Drools being used in a similar problem with
success ?
Do you have some hints on how to modelise this problem in Drools ?

Thanks in advance for your advice.
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Re: [rules-users] Is Drools suitable for preprocessing my Resource Allocation Problem

[Wolfgang Laun]

I don't see any reason why Drools should not be capable of
handling this kind of problem. Some consideration should be
given to the way the rules are written, depending on the number
of constraints matching the properties: the ones reducing the
number of possible matches most should come first in the
rule. Possibly it is the Resource that should precede the
Activity, but of course this depends on the constraints.

-W

On 07/12/2012, Raphael Jolivet raphael.joli...@gmail.com wrote:
 Hello,

 Here is a copy of a question I just sent on Stackoverflow :
 http://stackoverflow.com/questions/13753983/is-drools-suitable-for-preprocessing-a-resource-allocation-problem

 I have a quite big resource allocation problem to compute.

 I have just discovered Drools and I would like to know if it is a good
 candidate to work as a preprocessor and generate a list of forbidden
 allocations, based on some user rules.

 The ProblemI have an optimisation engine that can allocate some activities
 to some resources, while optimizing some KPIs (Key Performance Indicator).

 The optimizer takes as input (among others) a list of forbiden allocations
 that should be generated based on some user-provided rules.

 Each forbid rule is an AND composition of two rules:

 One for the activity
 One for the resource
 Each sub rule is itself a list of AND tests on some attributes.

 Here is the structure of one rule, in Pseudo-Code

 Rule1:
 * ActivityRule
   * activity.prop1 == foo AND
   * activity.prop2 == bar AND
   * ...
 * ResourceRule
   * resource.prop3 == foobar AND
   * resource.prop4 == NULL AND
   * ...

 Rule2:
...


 As soon as a pair of [Activity,Resource] matches one rule, it should be
 sent as output, and not tested again against other rules.

 Also, this is important to note that some rules will match very often,
 while overs will match very rarely (very specific cases).

 Performance constraints
 Here are some rough hints about the volumetry of the problem :
 * 1000 activities
 * 200 resources
 * 50 rules

 I need the forbidden allocations to be generated in under a minute.

 The challengeAs far, as I understand, Drools can surely generate those
 forbidden allocations. the question is : How smart is he ?

 If I had to write an engine myself for this particular problem, I would
 make some improvements :

 For example, I would not generate all possible allocations (200.000) and
 then try to apply each rule on it (50 rules x 200.000).

 Instead, I would try to match the resources and the activities separately
 on each rule (each side of the rule), and then assemble the couples that
 match at least one common rule.

 Also, I would add some counter on each rule that would auto increment upon
 each match, in order to apply first the rules that match often.

 QuestionsIs the engine of Drools smart enought for that ? Or is he even
 smarter ?
 Do you have an example of Drools being used in a similar problem with
 success ?
 Do you have some hints on how to modelise this problem in Drools ?

 Thanks in advance for your advice.

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