Re: [rules-users] collection question
Very clean.
Earnie!
From: Steve Ronderos
To: Rules Users List
Sent: Wed, July 21, 2010 9:56:56 AM
Subject: Re: [rules-users] collection question
Hi J,
In your example I don't think that the collect is necessary.
I believe the following will work:
rule "AddBonusCd"
when
$so : ShippingOrder()
Product(name == "cd1") from $so.products
not (Product(name == "bonus_cd") from $so.products)
then
System.out.println("Adding Bonus Cd");
Set productSet = new HashSet($so.getProducts());
Product bonusCd = new Product();
bonusCd.setName("bonus_cd");
productSet.add(bonusCd);
modify($so) {
setProducts(productSet);
}
end
You don't need the collects because you are just checking for
existence/non-existence of facts within the products collection.
Good luck!
Steve
rules-users-boun...@lists.jboss.org wrote on 07/21/2010 01:59:40 AM:
> From:
>
> Wolfgang Laun
>
> To:
>
> Rules Users List
>
> Date:
>
> 07/21/2010 02:02 AM
>
> Subject:
>
> Re: [rules-users] collection question
>
> Sent by:
>
> rules-users-boun...@lists.jboss.org
>
> Things would be smpler if you could avoid re-creating Product objects
> because adding an identical Object does not change the Set. (This
> could be implemented with the help of a global Map,)
>
> Second, overriding equals (and hashCode) in Product would also avoid adding
> an "evil twin" in your rule code - as it is!
>
> Even simpler is a solution where the relevant Product objects are inserted
> as facts, so that
>$cd1 : Product( name == "cd1" )
>$bonus_cd : Product( name == "bonus_cd" )
>$order : ShippingOrder( products contains $cd1, products not
> contains $bonus_cd )
> is true (again, with equals and hashCode being overridden).
>
> Given your solution with collect, an additional eval testing for
> "bonus_cd" not being the
> name of the single Product in List $productList might be more
> efficient than iterating
> all products a second time.
>
> -W
>
> On 21 July 2010 00:41, javaj wrote:
> >
> > I'm trying to write a rule to add an object to a collection if thecollection
> > already contained a certain object with a specific attribute.
> >
> > I developed a small example so maybe that will make more sense:
> >
> > Use Case: In a product shipping applicaiton, anytime a product with the name
> > "cd1" is in the shipping order, a bonus product named "bonus_cd" needs to be
> > added to the shipping order. The bonus cd should not be added if it's
> > already in the shipping order.
> >
> > Shipping Order:
> >
> > public class ShippingOrder {
> >
> >private Set products;
> >
> >public ShippingOrder() {}
> >
> >public Set getProducts() {
> >return products;
> >}
> >
> >public void setProducts(Set products) {
> >this.products = products;
> >}
> >
> > }
> >
> > Product:
> >
> > public class Product {
> >
> >private String name;
> >
> >public Product(){}
> >
> >public String getName() {
> >return name;
> >}
> >
> >public void setName(String name) {
> >this.name = name;
> >}
> >
> > }
> >
> >
> > Rule:
> >
> > rule "AddBonusCd"
> >
> >when
> >$so : ShippingOrder()
> >$productList : ArrayList(size == 1) from collect(
> Product(name matches
> > "cd1|bonus_cd") from $so.products)
> >then
> >System.out.println("Adding Bonus Cd");
> >
> >Set productSet = new HashSet
> ($so.getProducts());
> >
> >Product bonusCd = new Product();
> >bonusCd.setName("bonus_cd");
> >productSet.add(bonusCd);
> >
> >modify($so) {
> >setProducts(productSet);
> >}
> > end
> >
> > The Shipping Order object is inserted as the fact.
> >
> > The rule is valid if only cd1 or cd_bonus is in the shipping order. I only
> > want the rule to run when cd1 is in the product set but cd_bonus is not.
> > Makes sense?
> >
> > Thanks,
> > J
> > --
> > View this message in context: http://drools-java-rules-engine.
> 46999.n3.nabble.com/collection-question-tp982769p982769.html
> > Sent from the Drools - User mailing list archive at Nabble.com.
> > ___
> > rules-users mailing list
> > rules-users@lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
>
> ___
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Re: [rules-users] collection question
Would the following accomplish your goal?
Earnie!
import java.util.*;
import com.sample.Product;
import com.sample.ShippingOrder;
rule "AddBonusCd"
when
$so : ShippingOrder()
ArrayList(size == 1) from collect( Product(name matches
"cd1") from $so.products)
ArrayList(size == 0) from collect( Product(name matches
"bonus_cd") from $so.products)
then
System.out.println("Adding Bonus Cd ");
Set productSet = new HashSet($so.getProducts());
Product bonusCd = new Product();
bonusCd.setName("bonus_cd");
productSet.add(bonusCd);
modify($so) {
setProducts(productSet);
}
end
From: javaj
To: rules-users@lists.jboss.org
Sent: Tue, July 20, 2010 6:41:25 PM
Subject: [rules-users] collection question
I'm trying to write a rule to add an object to a collection if the collection
already contained a certain object with a specific attribute.
I developed a small example so maybe that will make more sense:
Use Case: In a product shipping applicaiton, anytime a product with the name
"cd1" is in the shipping order, a bonus product named "bonus_cd" needs to be
added to the shipping order. The bonus cd should not be added if it's
already in the shipping order.
Shipping Order:
public class ShippingOrder {
private Set products;
public ShippingOrder() {}
public Set getProducts() {
return products;
}
public void setProducts(Set products) {
this.products = products;
}
}
Product:
public class Product {
private String name;
public Product(){}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
Rule:
rule "AddBonusCd"
when
$so : ShippingOrder()
$productList : ArrayList(size == 1) from collect( Product(name matches
"cd1|bonus_cd") from $so.products)
then
System.out.println("Adding Bonus Cd");
Set productSet = new HashSet($so.getProducts());
Product bonusCd = new Product();
bonusCd.setName("bonus_cd");
productSet.add(bonusCd);
modify($so) {
setProducts(productSet);
}
end
The Shipping Order object is inserted as the fact.
The rule is valid if only cd1 or cd_bonus is in the shipping order. I only
want the rule to run when cd1 is in the product set but cd_bonus is not.
Makes sense?
Thanks,
J
--
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http://drools-java-rules-engine.46999.n3.nabble.com/collection-question-tp982769p982769.html
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Re: [rules-users] Dynamic attribute in Guvnor
What triggers the change in DynamicAttribute? How does the rule know to use AssetID versus AssetOwner for instance? Earnie! From: bbarani To: rules-users@lists.jboss.org Sent: Mon, July 19, 2010 2:40:41 PM Subject: [rules-users] Dynamic attribute in Guvnor Hi, We have a scenario as below, Here is what we want to achieve. Let’s say we want to have following rule: When AssetType = DSTR Then Decision = Granted. I can have AssetType as static class or attribute in the model. But this may limit our ability to handle new information. Let’s say now I have rule to restrict access to a specific metadata asset like: When AssetID = 8-XXX-1234 and Group<>’HR’ then Decision = Denied. If we don’t have AssetID, then no one can define that rule until we change the code. What we really want is if Drools can do something like this: When DynamicAttribute(“AssetID”) = 8-xxx-1234and Group<>’HR’ then Decision = Denied. Any one has implemented anything similar to this before?? Thanks, BB -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Dynamic-attribute-in-Guvnor-tp979262p979262.html Sent from the Drools - User mailing list archive at Nabble.com. ___ 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
Re: [rules-users] Avoiding writing redundant rules
A couple of things come to mind with regards to your "example solution": 1. Will there only ever be one Person in working memory that can match and trigger your first rule? If not, setting a single boolean will only indicate that the first rule has fired at least once, not for each Person, or one Person, or two... or whatever your requirement is. 2. I usually accomplish this with a place holder fact or a fact created as an extension of a, for example your Person, class. This also acts as a place holder. I agree, I don't like having duplicated code that is just negated because as we know, negating a "simple rule" can turn out to be not such a simple thing to do. Earnie! From: skasab2s To: rules-users@lists.jboss.org Sent: Mon, July 19, 2010 12:57:39 PM Subject: [rules-users] Avoiding writing redundant rules Hello, in our company we use DRL-files and we have the problem with the fact, that rules have no 'else'-part. We've read in this forum, that we can simulate the else-part of a rule by declaring a new rule which has the constraints of the first rule, but negated. We regard this as some kind of redundancy in our code , besides our rule-files become twice as large and drools have to evaluate the (almost) same constraints twice. We wanted to ask you if it makes sense to declare additional variables in order to mark if a rule has fired. Something like this: declare FirstRuleHasFired value: boolean end ... //Insert an object from type FirstRuleHasFired ... rule "FirstRule" salience 100 when Person (name) then //do some job firstRuleHasFired.setValue(true) ; end rule "SecondRule" salience 90 when not(FirstRuleHasFired(value == true)) then //do some other job ) .. Or do you know some other useful tricks to avoid the redundancy I have written about? Thanks a lot for every idea and/or advice! Regards, skasab2s -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Avoiding-writing-redundant-rules-tp979016p979016.html Sent from the Drools - User mailing list archive at Nabble.com. ___ 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
Re: [rules-users] Inter-fact comparison
Greg, Thanks for the example. This should do what I need. Can you point me to some documentation on how to create custom operators? Earnie! From: Greg Barton To: Rules Users List Sent: Tue, June 22, 2010 4:29:50 PM Subject: Re: [rules-users] Inter-fact comparison A regular old accumulate could do this. Doesn't even have to be custom: rule "many bogus attempts" when $login : Login( $baseName : name) $total : Number( intValue > 5 ) from accumulate( Login( this != login, eval(levenshtein(name, baseName) ), init( int total = 0; ), action( total++; ), reverse( total--; ), result( total ) ) then //ALARM! end This basically says "accumulate all Logins where the name is within a levenshtein distance of a given Login and freak out if there's more than X." This rule isn't all fusiony, but you get the idea. Also, the eval in the accumulate could be a custom operator for readability. --- On Tue, 6/22/10, Earnest Dyke wrote: >From: Earnest Dyke >Subject: Re: [rules-users] Inter-fact comparison >To: "Rules Users List" >Date: Tuesday, June 22, 2010, 2:57 PM > > >Thanks for the quick reply. > >Yes, the original facts are already coming in via a stream (Fusion) to an >existing set of rules so I was hoping to build on that. What I am trying to do >is evaluate logins information as users are attempting to login trying to >identify hack attempts by a person trying to login with a slightly different >user name over a given period of time. > >Earnie! > > > > From: David Sinclair >To: Rules Users List > >Sent: Tue, June 22, 2010 3:47:36 PM >Subject: Re: [rules-users] Inter-fact comparison > >>Hi Earnie, > >What you are explaining seems pretty straight forward and would more likely >than not be overkill to use a rule engine. Are there other aspects of the >system you are leaving out that warrant the use of Drools? > >dave > > >2010/6/22 Earnest Dyke > >Greetings all, >> >>I have a requirement to compare a set of facts against each other, calculate >>a value that indicates the amount of difference (Levenshtein distance) >>between a single attribute on each fact. So I load all of my facts into >>working memory then what? Do I execute a rule first that creates a new set of >>facts which is a Cartesian product of the original set of facts, each new >>fact containing a reference to two original facts and the diff between them? >>Looked at using a custom accumulate function but I don't think that's going >>to do what I need since it is intended to go through a set of facts and >>return a single value. >> >>Any and all related help is appreciated. >> >>Earnie! >> >>___ >>>>rules-users mailing list >>rules-users@lists.jboss.org >>https://lists.jboss.org/mailman/listinfo/rules-users >> >> > >-Inline Attachment Follows- > > >___ >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
Re: [rules-users] Inter-fact comparison
Thanks for the quick reply. Yes, the original facts are already coming in via a stream (Fusion) to an existing set of rules so I was hoping to build on that. What I am trying to do is evaluate logins information as users are attempting to login trying to identify hack attempts by a person trying to login with a slightly different user name over a given period of time. Earnie! From: David Sinclair To: Rules Users List Sent: Tue, June 22, 2010 3:47:36 PM Subject: Re: [rules-users] Inter-fact comparison Hi Earnie, What you are explaining seems pretty straight forward and would more likely than not be overkill to use a rule engine. Are there other aspects of the system you are leaving out that warrant the use of Drools? dave 2010/6/22 Earnest Dyke Greetings all, > >I have a requirement to compare a set of facts against each other, calculate a >value that indicates the amount of difference (Levenshtein distance) between a >single attribute on each fact. So I load all of my facts into working memory >then what? Do I execute a rule first that creates a new set of facts which is >a Cartesian product of the original set of facts, each new fact containing a >reference to two original facts and the diff between them? Looked at using a >custom accumulate function but I don't think that's going to do what I need >since it is intended to go through a set of facts and return a single value. > >Any and all related help is appreciated. > >Earnie! > >___ >>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
[rules-users] Inter-fact comparison
Greetings all, I have a requirement to compare a set of facts against each other, calculate a value that indicates the amount of difference (Levenshtein distance) between a single attribute on each fact. So I load all of my facts into working memory then what? Do I execute a rule first that creates a new set of facts which is a Cartesian product of the original set of facts, each new fact containing a reference to two original facts and the diff between them? Looked at using a custom accumulate function but I don't think that's going to do what I need since it is intended to go through a set of facts and return a single value. Any and all related help is appreciated. Earnie! ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] How to Enrich Facts with Data from a Database
Ken,
Neither solution makes any assumption about data storage. Hibernate entities
could be used or simple POJOs, matters not. As to your Example, I have used
something similar to the following:
public class Entity {
private String firstName;
public String getFirstName() { return firstName; }
public void setFirstname(String firstName) { this.firstName = firstName; }
}
public class FactEntity {
private Entity entity;
private String additionalAttribute;
public FactEntity(Entity entity) { this.entity = entity; }
public Entity getEntity() { return entity; }
public void setEntity(Entity entity) { this.entity = entity; }
public String getAdditionalAttribute() { return additionalAttribute; }
public void setAdditionalAttribute(String additionalAttribute) {
this.additionalAttribute = additionalAttribute; }
}
In your class that inserts the Entity facts into working memory, you just;
FactEntity fe = new FactEntity(originalEntity);
workingMemory.insert(fe);
In your rule, you can then do something like;
rule
when
$fe : FactEntity(additionalAttribute == "Supervisor")
then
System.out.println($fe.entity.firstName);
end
Earnie!
From: Ken Archer
To: rules-users@lists.jboss.org
Sent: Thursday, July 30, 2009 9:13:35 AM
Subject: Re: [rules-users] How to Enrich Facts with Data from a Database
Earnie,
Thanks for this. Do your two solutions to fact enrichment presume use of the
Hibernate framework to interact with a database in the rules? Would an example
of your first solution be the following?
when
$w : WMFact($key : id)
$d : DatabaseFact(parentKey == $key)
then
$w.Field1=$d.Field1 AND $w.Field2=$d.Field2 AND $w.Field3=$d.Field3
Ken
Date: Tue, 28 Jul 2009 09:35:47 -0700
From: earnied...@yahoo.com
To: rules-users@lists.jboss.org
Subject: Re: [rules-users] How to Enrich Facts with Data from a Database
One way is to extend the original classes and add the desired attributes, then
insert the extended class into WorkingMemory. You could then use RHS to modify
matched facts. Another way is to inject "related" facts. So your LHS matches a
fact and you insert a new "related" fact in the RHS. Rules that must evaluate
data from both facts can the do something like this:
when
$b : BaseFact($key : id)
$r : RelatedFact(parentKey == $key)
then
...
I have used both albeit on small sets of facts and both worked fine.
Earnie!
From: Ken Archer
To: rules-users@lists.jboss.org
Sent: Tuesday, July 28, 2009 12:22:37 PM
Subject: [rules-users] How to Enrich Facts with Data from a Database
I would like to append values to facts in working memory with
values from a database before rules processing. The Fusion documentation
says, “one of the most common use cases for rules is event data enrichment”,
but no documentation seems to explain how this is done whether we’re talking
about events or just plain old facts. And the RHS syntax seems to be
limited to working with data already in working memory. How can I enrich
facts with data from another system? Thanks in advance.
Ken Archer
Telogical Systems___
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Re: [rules-users] How to Enrich Facts with Data from a Database
One way is to extend the original classes and add the desired attributes, then insert the extended class into WorkingMemory. You could then use RHS to modify matched facts. Another way is to inject "related" facts. So your LHS matches a fact and you insert a new "related" fact in the RHS. Rules that must evaluate data from both facts can the do something like this: when $b : BaseFact($key : id) $r : RelatedFact(parentKey == $key) then ... I have used both albeit on small sets of facts and both worked fine. Earnie! From: Ken Archer To: rules-users@lists.jboss.org Sent: Tuesday, July 28, 2009 12:22:37 PM Subject: [rules-users] How to Enrich Facts with Data from a Database I would like to append values to facts in working memory with values from a database before rules processing. The Fusion documentation says, “one of the most common use cases for rules is event data enrichment”, but no documentation seems to explain how this is done whether we’re talking about events or just plain old facts. And the RHS syntax seems to be limited to working with data already in working memory. How can I enrich facts with data from another system? Thanks in advance. Ken Archer Telogical Systems___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] setFocus
I vote helper method. :-) Earnie! From: Edson Tirelli To: Rules Users List Sent: Friday, June 12, 2009 11:59:40 AM Subject: Re: [rules-users] setFocus getAgenda().getAgendaGroup(String group).setFocus(); We are still discussing if we should create a helper method for this or keeping it normalized like that is good enough. []s Edson 2009/6/12 Earnest Dyke Converting a 4.0.7 project to 5.0.1 and StatefulKnowledgeSession does not have a .setFocus method like StatefulSession has. How do I accomplish the same function in 5.0.1? > >Earnie! > >___ >>rules-users mailing list >rules-users@lists.jboss.org >https://lists.jboss.org/mailman/listinfo/rules-users > > -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] setFocus
Thanks Wolfgang. As usually happens I found this 10 minutes after I sent the email. :-) Earnie! From: Wolfgang Laun To: Rules Users List Sent: Friday, June 12, 2009 11:49:31 AM Subject: Re: [rules-users] setFocus For instance: ksession.getAgenda().getAgendaGroup( "Group A" ).setFocus(); -W 2009/6/12 Earnest Dyke Converting a 4.0.7 project to 5.0.1 and StatefulKnowledgeSession does not have a .setFocus method like StatefulSession has. How do I accomplish the same function in 5.0.1? > >Earnie! > >___ >>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
[rules-users] setFocus
Converting a 4.0.7 project to 5.0.1 and StatefulKnowledgeSession does not have a .setFocus method like StatefulSession has. How do I accomplish the same function in 5.0.1? Earnie! ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] 5.0 newbie question
Greetings all, I just downloaded 5.0 yesterday and have been going through the doc and have a question: with Rules is the idea to have one active flow per session or can a session have more than one active flow? Earnie! ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: re[rules-users] move hardcoded values in DRL or have constants inside drl
Wolfgang makes a good point. However, given the requirement that the value
changes and is not truly static, I would recommend something like the following
which, if your SearchParm loads the data from a persisted source you could
change it's value without any code change.
Earnie!
package com.sample
rule "Test Rule"
when
SearchParam($searchName : searchName)
$person : Person(name == $searchName)
then
System.out.println(drools.getRule().getName() + " [" + $searchName + "]
[" + $person.getName() + "]");
$person.setActivation(true);
end
package com.sample;
public class Person {
private String name;
private Boolean activation;
public Person(String name, Boolean activation) {
this.name = name;
this.activation = activation;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Boolean getActivation() {
return activation;
}
public void setActivation(Boolean activation) {
this.activation = activation;
}
}
package com.sample;
public class SearchParam {
private String searchName;
public SearchParam(String searchName) {
super();
this.searchName = searchName;
}
public String getSearchName() {
return searchName;
}
public void setSearchName(String searchName) {
this.searchName = searchName;
}
}
package com.sample;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.Properties;
import org.drools.RuleBase;
import org.drools.RuleBaseFactory;
import org.drools.StatefulSession;
import org.drools.compiler.PackageBuilder;
import org.drools.compiler.PackageBuilderConfiguration;
import org.drools.rule.Package;
import org.drools.rule.builder.dialect.java.JavaDialectConfiguration;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.*;
public class GlobalTest {
private RuleBase ruleBase;
@Test
public void testWithGlobal() {
StatefulSession ss = ruleBase.newStatefulSession();
Person p = new Person("John",false);
ss.insert(p);
SearchParam sp = new SearchParam("John");
ss.insert(sp);
ss.fireAllRules();
assertTrue(p.getActivation().equals(true));
}
@Before
public void buildRules() throws Exception {
Reader source = new InputStreamReader(this.getClass()
.getResourceAsStream("/test.drl"));
Properties props = new Properties();
props.setProperty("drools.dialect.java.compiler", "JANINO");
PackageBuilderConfiguration cfg = new
PackageBuilderConfiguration(props);
JavaDialectConfiguration javaConf = (JavaDialectConfiguration) cfg
.getDialectConfiguration("java");
javaConf.setCompiler(JavaDialectConfiguration.JANINO);
PackageBuilder builder = new PackageBuilder(cfg);
builder.addPackageFromDrl(source);
Package pkg = builder.getPackage();
ruleBase = RuleBaseFactory.newRuleBase();
ruleBase.addPackage(pkg);
}
}
From: Wolfgang Laun
To: Rules Users List
Sent: Monday, June 1, 2009 7:57:36 AM
Subject: Re: re[rules-users] move hardcoded values in DRL or have constants
inside drl
But assigning a value to a global isn't straightforward - you can't do
it in the declaration. You'll have to do it from the application (or
use some dirty hack, in a start-up rule); either way it's separate
from the declaration.
IMHO, using a Java class with public static final is definitely cleaner.
-W
2009/6/1 Earnest Dyke :
> How about adding them as Globals and referencing them that way? You should
> be able to put them in a map as well in a Global and reference them.
>
> Earnie!
>
>
> From: karthizap
> To: rules-users@lists.jboss.org
> Sent: Monday, June 1, 2009 7:14:56 AM
> Subject: re[rules-users] move hardcoded values in DRL or have constants
> inside drl
>
> Is there is anyway i can remove hardcoded values in the DRL file? Can I have
> the constants file(like data dictionary) inside drl/functions. I don't want
> to refer java constants class directly in drl file and would like to declare
> and refer those constants inside drl file.
>
> View this message in context: remove hardcoded values in DRL or have
> constants inside drl
> Sent from the drools - user mailing list archive at Nabble.com.
>
> ___
> rules-users mailing list
> rules-users@lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
___
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Re: re[rules-users] move hardcoded values in DRL or have constants inside drl
How about adding them as Globals and referencing them that way? You should be able to put them in a map as well in a Global and reference them. Earnie! From: karthizap To: rules-users@lists.jboss.org Sent: Monday, June 1, 2009 7:14:56 AM Subject: re[rules-users] move hardcoded values in DRL or have constants inside drl Is there is anyway i can remove hardcoded values in the DRL file? Can I have the constants file(like data dictionary) inside drl/functions. I don't want to refer java constants class directly in drl file and would like to declare and refer those constants inside drl file. View this message in context: remove hardcoded values in DRL or have constants inside drl Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools and OpenJPA
As an update: I tried several things to remedy this problem. I tried adding the classloader to the JPA classes to the RuleBaseConfiguration but that had no effect. After much code digging, debugging and research I decided to setShadowProxy(false) on the RuleBaseConfiguration and low-and-behold things worked. No sure why Drools can't create the proxies for the JPA classes. I will save that for the next rainy day. Earnie1 From: Earnest Dyke To: JBoss Rules Sent: Wednesday, May 6, 2009 11:15:10 AM Subject: [rules-users] Drools and OpenJPA Greetings all, I am trying to use Drools 4.0.7 with objects that are retrieved via OpenJPA. So I have a Person entity which is in the package com.my.company.entity. When I retrieve it via OpenJPA what I get, and subsequently insert into working memory, is a org.apache.openjpa.enhance.com$my$company$entity$Person$pcsubclass. I have tried casting before inserting into working memory but that does not change things. Drools is throwing java.lang.NoClassDefFoundError: org/apache/openjpa/enhance/com$my$company$entity$Person$pcsubclass exception. Any ideas of how to get around this? I really don't want to have to declare the concrete (OpenJPA) classes in my rules if I can help it. Thanks in advance for any and all help! Earnie!___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Drools and OpenJPA
Greetings all, I am trying to use Drools 4.0.7 with objects that are retrieved via OpenJPA. So I have a Person entity which is in the package com.my.company.entity. When I retrieve it via OpenJPA what I get, and subsequently insert into working memory, is a org.apache.openjpa.enhance.com$my$company$entity$Person$pcsubclass. I have tried casting before inserting into working memory but that does not change things. Drools is throwing java.lang.NoClassDefFoundError: org/apache/openjpa/enhance/com$my$company$entity$Person$pcsubclass exception. Any ideas of how to get around this? I really don't want to have to declare the concrete (OpenJPA) classes in my rules if I can help it. Thanks in advance for any and all help! Earnie!___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] listbox in DSL
Do you want to use Drools to determine which elements are added to the listbox? Earnie! From: sreenivas555 To: rules-users@lists.jboss.org Sent: Wednesday, April 22, 2009 8:58:09 AM Subject: [rules-users] listbox in DSL Hi All, I want to create a listbox (multi selections) using DSL. is it possible? If yes, please provide some pointers. I am using Drools 5, JDK 1.5 , jboss-eap-4.3 Thanks in advance. -- View this message in context: http://www.nabble.com/listbox-in-DSL-tp23175424p23175424.html Sent from the drools - user mailing list archive at Nabble.com. ___ 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
[rules-users] Old messages
Is anyone else receiving old list messages? I have received over 20 with some dated as far back as June 2008. Earnie!___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Using rules engine to find patterns in time series data
Not sure what type of data you expect to get back. Are you looking for all the objects that make up an "event" of just the fact (no pun intended) that the event has occured? Earnie! From: "Towler, Robert [RA]" To: rules-users@lists.jboss.org Sent: Friday, April 17, 2009 11:19:31 AM Subject: [rules-users] Using rules engine to find patterns in time series data I’m looking at the rules engine as a mechanism to find patterns in some time series data. I’m looking for things like there where N spikes above a certain threshold value in a certain period of time. I was wondering if anyone has done this, or have any ideas on how best to do this with the rules engine. My own ideas & the prototype I’ve built seem to be really procedural, so I’m wondering if there’s a better way that I’m missing. Robert___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] How to clone object inside a rule
Override and implement the clone method of the class you want to clone/copy then in the RHS of your rule do: SomeClass copy = $someclass.clone(); Earnie! From: Ashish Soni To: Rules Users List Sent: Wednesday, April 1, 2009 9:50:25 AM Subject: [rules-users] How to clone object inside a rule Hi All , I want to clone/copy one object inside a rule depends on some condition , Please let me know how i can do that ? Regards, Ashish ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Guvnor and 'from' database
Could you do the same thing with an entity manager? Earnie! From: Mark Proctor To: Rules Users List Sent: Friday, March 27, 2009 2:09:19 PM Subject: Re: [rules-users] Guvnor and 'from' database a...@work wrote: > I am trying to use drools to evaluate the following rule: > > Given a telephone number, if the telephone number already exists in database > and has a balance > 0, set isAllowed = false. > Looking at forum posts I understand that this can be achieved using > hibernate and 'from' keyword. However, this is my current scenario - I > create a package snapshot for my rules in Guvnor and use the URL in Drools > execution server. Execution server runs only stateless sessions. > Where and how do I use hibernate named queries? set the hibernate session as a global and then the 'from' can access it. > Thx, > Anu > > > ___ 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
Re: [rules-users] Chart notation, update, and infinite loops
Dan, Why would you have more than one Charge when you are not qualifying it? Are they all the same? Do you not care which one matches? Earnie! From: Dan Seaver <[EMAIL PROTECTED]> To: rules-users@lists.jboss.org Sent: Tuesday, November 4, 2008 12:50:09 PM Subject: [rules-users] Chart notation, update, and infinite loops I'm trying to find a good technique for updating specific facts in working memory. What I'm currently doing is something like this: Rule "Update Amount" when amountFact : Fact(name == "Amount") charge : Charge() then Double amount = amountFact.getAmount(); Double chargeAmount = charge.getAmount(); amountFact.setAmount(amount + chargeAmount); update(amountFact); end The update statement causes an infinite loop. I tried using no-loop, which works if there is 1 charge, but not if there are more than one. Any help with solutions or strategies would be much appreciated. -- View this message in context: http://www.nabble.com/Chart-notation%2C-update%2C-and-infinite-loops-tp20327483p20327483.html Sent from the drools - user mailing list archive at Nabble.com. ___ 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
Re: [rules-users] Newbie question on accessing predecessor and successor in a list
Chris,
You wouldn't necessarily need to clone you business objects. If you create
classes that had them as attributes and injected your "new" classes into the
rules engine, you could accomplish both goals: no parallel model and classes
that support the needs of your rules.
Earnie!
From: CSchr <[EMAIL PROTECTED]>
To: rules-users@lists.jboss.org
Sent: Tuesday, November 4, 2008 11:58:22 AM
Subject: Re: [rules-users] Newbie question on accessing predecessor and
successor in a list
Yes that's correct. No way to change the model yet. But I think I could
introduce additional objects and could even "clone" the business objects
into more convenient objects just for rule evaluation. But this would be my
least prefered solution as it would introduce a layer of transformation and
a parallel (mirror) model that needs to be updated whenever the business
model changes in future releases.
Regards,
Chris
Greg Barton wrote:
>
> I think you'd have to toss in ControlFact instances with positions from 1
> to journey.segmentList.size-1 for this to work. Otherwise the evaluation
> of the journey.segmentList would halt on the first failure of the rule to
> match. Then the modify block wouldn't be needed in the action.
>
> Also, CSchr, you mentioned that the business model could not be altered.
> Does that mean you can't use additional objects like control facts?
>
> --- On Tue, 11/4/08, Edson Tirelli <[EMAIL PROTECTED]> wrote:
>
>> From: Edson Tirelli <[EMAIL PROTECTED]>
>> Subject: Re: [rules-users] Newbie question on accessing predecessor and
>> successor in a list
>> To: "Rules Users List"
>> Date: Tuesday, November 4, 2008, 8:56 AM
>> Christian,
>>
>>My guess is that there are better approaches to do what
>> you want (i.e.,
>> write your business rules) without using specific indexes
>> in a list, since
>> that is usually a sign of trying to use a imperative
>> algorithm in a
>> declarative engine.
>>If you can share a mock of what your business rule is,
>> maybe we can help
>> more.
>>
>>Having said that, about your questions:
>>
>> * You can use eval inside patterns. Just remember that
>> eval() uses a code
>> block in the same dialect you are using to write your rules
>> (default is
>> java). So, $journey.segmentList is probably not valid in
>> java (since
>> segmentList is probably private attribute), but is valid in
>> MVEL that
>> transparently call getSegmentList(). So, either change your
>> expression to a
>> correct java expression or change the rule dialect to MVEL.
>>
>> * DISCLAIMER: THIS IS REALLY BAD PRACTICE: if you really
>> want to emulate
>> "imperative programming" for this rule, you need
>> a control fact to keep
>> track of the index you are testing:
>>
>> rule "Children: do not do this at home, unless your
>> parents says it is ok"
>> when
>> $cf : ControlFact( $pos : position <
>> $journey.segmentList.size )
>> $s : Segment( countries contains Country.Switzerland,
>> ... ) from
>> $journey.segmentList[$pos]
>> $ps : Segment( countries not contains
>> Country.Switzerland, ... ) from
>> $journey.segmentList[$pos-1]
>> then
>> // do something
>> // and also update control fact
>> modify( $cf ) { setPosition( $pos + 1 ) }
>> end
>>
>> Initialize control fact with position number 1 and it
>> should be fine, but I
>> did not tested the above rule.
>>
>>[]s
>>Edson
>>
>>
>> 2008/11/4 CSchr <[EMAIL PROTECTED]>
>>
>> >
>> > Thanks Greg for your fast reply. Unfortunately I do
>> not get this to work:
>> >
>> > $preSegment : Segment (
>> >
>> $journey.segmentList.indexOf(this) ==
>> > ($journey.segmentList.indexOf($segment) - 1),
>> >countries not contains
>> Country.Switzerland && ...
>> > ) from $journey.segmentList
>> >
>> > Compiler throws:
>> >
>> > [36,48]: unknown:36:48 Unexpected token
>> 'this'[36,98]: unknown:36:98
>> > Unexpected token '$segment'
>> >
>> > Is it possible to use eval() inside Segment ()?
>> >
>> > With eval the compiler throws something like this:
>> >
>> > $journey.segmentList cannot be resolved to a type
>> > Cannot use this in a static context
>> >
>> > I don't know how matching works in drools, but
>> wouldn't this also be very
>> > expensive? As for every match of Segment ( ) the
>> segmentList has to be
>> > iterated two times. These lists can get very long. A
>> cheap approach would
>> > be
>> > if the from statement would "know" the index
>> of the Segment () matched. I
>> > was hoping this would be possible.
>> >
>> >
>> > Regards,
>> >
>> > Chris
>> >
>> >
>> > Greg Barton wrote:
>> > >
>> > > You can't do
>> $journey.segmentList.indexOf(this) and
>> > > $journey.segmentList.indexOf($segment), even in
>> an eval?
>> > >
>> > > --- On Mon, 11/3/08, CSchr
>> <[EMAIL PROTECTED]> wrote:
>> > >
>> > >> From: CSchr
>> <[EMAIL PROTECTED]>
>> > >> Subject: [rules-users] Newbie question on
>> accessing predeces
Re: [rules-users] Problem with setting a Global
Thanks for the response. I have tried that actually. Left it out of the code
snippet by accident. I have tired both:
import org.jboss.seam.log.Log
global Log log
as well as:
global import org.jboss.seam.log.Log log
and neither made a difference.
Earnie!
- Original Message
From: Ingomar Otter <[EMAIL PROTECTED]>
To: Rules Users List
Sent: Thursday, September 11, 2008 12:42:43 PM
Subject: Re: [rules-users] Problem with setting a Global
You have to declare the global in the rule package.
global foo.bar.Logger logger;
--Ingomar
Am 11.09.2008 um 18:24 schrieb Earnest Dyke:
> Greetings all,
>
> I have the following Java code and rule. When executed I get an
> "Unexpected Global" exception (see below). What am I doing wrong?
>
>
> @In WorkingMemory wm
>
> @Logger Log log;
>
> public void calculate() {
>wm.setGlobal("logger",log);
>wm.insert(calcResult);
>wm.fireAllRules();
> }
>
>
> rule "Calc"
>when
>$c : CalcResult();
> then
>log(drools.getRule().getName(),log);
>// Do calculation
> end
>
> function void log(String msg, Log log) {
>log.debug(msg,new Object[]{});
> }
>
> When the calculate method is executed I get the following exception:
>
>
> java.lang.RuntimeException: Unexpected global [logger]
> at
> org
> .drools
> .common.AbstractWorkingMemory.setGlobal(AbstractWorkingMemory.java:
> 367)
> at
> org.ebsinc.ia.action.AnalysisAction.createData(AnalysisAction.java:93)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun
> .reflect
> .NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun
> .reflect
> .DelegatingMethodAccessorImpl
> .invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
> at
> org
> .jboss
> .seam
> .intercept.RootInvocationContext.proceed(RootInvocationContext.java:
> 31)
> at
> org
> .jboss
> .seam
> .intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:
> 56)
> at
> org
> .jboss
> .seam
> .core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46)
> at
> org
> .jboss
> .seam
> .intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:
> 68)
> at
> org
> .jboss
> .seam
> .persistence
> .ManagedEntityIdentityInterceptor
> .aroundInvoke(ManagedEntityIdentityInterceptor.java:48)
> at
> org
> .jboss
> .seam
> .intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:
> 68)
> at
> org
> .jboss
> .seam
> .transaction
> .RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:31)
> at
> org
> .jboss
> .seam
> .intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:
> 68)
> at
> org
> .jboss
> .seam
> .core
> .MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:
> 42)
> at
> org
> .jboss
> .seam
> .intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:
> 68)
> at
> org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:
> 106)
> at
> org
> .jboss
> .seam
> .intercept
> .JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:155)
> at
> org
> .jboss
> .seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:
> 91)
> at org.ebsinc.ia.action.AnalysisAction_$
> $_javassist_9.createData(AnalysisAction_$$_javassist_9.java)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun
> .reflect
> .NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun
> .reflect
> .DelegatingMethodAccessorImpl
> .invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
> at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:
> 125)
> at org.jboss.seam.Component.callComponentMethod(Component.java:2074)
> at org.jboss.seam.Component.callCreateMethod(Component.java:1997)
> at org.jboss.seam.Component.newInstance(Component.java:1968)
> at org.jboss.seam.Component.getInstance(Component.java:1865)
> at org.jboss.seam.Component.getInstance(Component.java:1832)
> at org.jboss.seam.Component.getInstanceFromFactory(Component.java:
> 1911)
> at org.jboss.seam.Compone
[rules-users] Problem with setting a Global
Greetings all,
I have the following Java code and rule. When executed I get an "Unexpected
Global" exception (see below). What am I doing wrong?
@In WorkingMemory wm
@Logger Log log;
public void calculate() {
wm.setGlobal("logger",log);
wm.insert(calcResult);
wm.fireAllRules();
}
rule "Calc"
when
$c : CalcResult();
then
log(drools.getRule().getName(),log);
// Do calculation
end
function void log(String msg, Log log) {
log.debug(msg,new Object[]{});
}
When the calculate method is executed I get the following exception:
java.lang.RuntimeException: Unexpected global [logger]
at
org.drools.common.AbstractWorkingMemory.setGlobal(AbstractWorkingMemory.java:367)
at
org.ebsinc.ia.action.AnalysisAction.createData(AnalysisAction.java:93)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
at
org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
at
org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46)
at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at
org.jboss.seam.persistence.ManagedEntityIdentityInterceptor.aroundInvoke(ManagedEntityIdentityInterceptor.java:48)
at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at
org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:31)
at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at
org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42)
at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:106)
at
org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:155)
at
org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:91)
at
org.ebsinc.ia.action.AnalysisAction_$$_javassist_9.createData(AnalysisAction_$$_javassist_9.java)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:125)
at org.jboss.seam.Component.callComponentMethod(Component.java:2074)
at org.jboss.seam.Component.callCreateMethod(Component.java:1997)
at org.jboss.seam.Component.newInstance(Component.java:1968)
at org.jboss.seam.Component.getInstance(Component.java:1865)
at org.jboss.seam.Component.getInstance(Component.java:1832)
at org.jboss.seam.Component.getInstanceFromFactory(Component.java:1911)
at org.jboss.seam.Component.getInstance(Component.java:1855)
at org.jboss.seam.Component.getInstance(Component.java:1832)
at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:55)
at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:50)
at org.jboss.seam.Namespace.get(Namespace.java:28)
at
org.jboss.seam.el.SeamELResolver.resolveInNamespace(SeamELResolver.java:197)
at org.jboss.seam.el.SeamELResolver.getValue(SeamELResolver.java:57)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53)
at
com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64)
at
org.jboss.el.parser.AstPropertySuffix.getValue(AstPropertySuffix.java:53)
at org.jboss.el.parser.AstValue.getValue(AstValue.java:67)
at
org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
at
com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
at
javax.faces.component.ValueBindingValueExpressionAdapter.getValue(ValueBindingValueExpressionAdapter.java:102)
at com.sun.facelets.component.UIRepeat.getValue(UIRepeat.java:143)
at com.sun.facelets.component.UIRepeat.getDataModel(UIRepeat.java:121)
at com.sun.facelets.component.UIRepeat.setIndex(UIRepeat.java:305)
at com.sun.facelets.component.UIRepeat.process(UIRepeat.java:333)
at com.sun.
[rules-users] Drools problem in Seam
Greetings all,
I posted this to the Seam users forum and they recommended I post it here as
well.
I am using Seam 2.0.0 and Drools 4.0.7. I am getting the following exception
when my rule is compiled on first access.
Rule:
package org.ebsinc.ia.rules
#list any import classes here.
import org.ebsinc.ia.entity.BenefitAnalysis;
import org.ebsinc.ia.entity.RetirementEligibility;
#declare any global variables here
rule "Verify FERS"
when
$ba : BenefitAnalysis(plan == "FERS")
$elig : RetirementEligibility(eligible == false)
then
System.out.println("FERS retirement");
$elig.setReason("ok");
end
components.xml
/security.drl
/RetirementEligibility.drl
Exception:
2008-08-26
08:40:37,750 ERROR [STDERR] at
org.drools.rule.builder.dialect.java.JavaConsequenceBuilder.build(JavaConsequenceBuilder.java:123)
at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:67)
at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:446)
at
org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:304)
at
org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:167)
at org.jboss.seam.drools.RuleBase.compileRuleBase(RuleBase.java:58)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:125)
at org.jboss.seam.Component.callComponentMethod(Component.java:2074)
at org.jboss.seam.Component.callCreateMethod(Component.java:1997)
at org.jboss.seam.Component.newInstance(Component.java:1968)
at org.jboss.seam.Component.getInstance(Component.java:1865)
at org.jboss.seam.Component.getInstance(Component.java:1832)
at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:55)
at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:50)
at org.jboss.seam.el.SeamELResolver.resolveBase(SeamELResolver.java:166)
at org.jboss.seam.el.SeamELResolver.getValue(SeamELResolver.java:53)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53)
at
com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64)
at org.jboss.el.parser.AstIdentifier.getValue(AstIdentifier.java:44)
at
org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
at org.jboss.seam.core.Expressions$1.getValue(Expressions.java:112)
at
org.jboss.seam.drools.ManagedWorkingMemory.getRuleBaseFromValueBinding(ManagedWorkingMemory.java:78)
at
org.jboss.seam.drools.ManagedWorkingMemory.getStatefulSession(ManagedWorkingMemory.java:67)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:125)
at org.jboss.seam.Component.callComponentMethod(Component.java:2074)
at org.jboss.seam.Component.unwrap(Component.java:2100)
at org.jboss.seam.Component.getInstance(Component.java:1879)
at org.jboss.seam.Component.getInstance(Component.java:1832)
at
org.jboss.seam.Component.getInstanceInAllNamespaces(Component.java:2174)
at org.jboss.seam.Component.getValueToInject(Component.java:2126)
at org.jboss.seam.Component.injectAttributes(Component.java:1590)
at org.jboss.seam.Component.inject(Component.java:1408)
at
org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:45)
at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at
org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42)
at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:106)
at
org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:155)
at
org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:91)
at
org.ebsinc.ia.action.AgentActi
[rules-users] Drools problem in Seam
Greetings all,
I posted this to the Seam users forum and they recommended I post it here as
well.
I am using Seam 2.0.0 and Drools 4.0.7. I am getting the following exception
when my rule is compiled on first access.
Rule:
package org.ebsinc.ia.rules
#list any import classes here.
import org.ebsinc.ia.entity.BenefitAnalysis;
import org.ebsinc.ia.entity.RetirementEligibility;
#declare any global variables here
rule "Verify FERS"
when
$ba : BenefitAnalysis(plan == "FERS")
$elig : RetirementEligibility(eligible == false)
then
System.out.println("FERS retirement");
$elig.setReason("ok");
end
components.xml
/security.drl
/RetirementEligibility.drl
Exception:
2008-08-26
08:40:37,750 ERROR [STDERR] at
org.drools.rule.builder.dialect.java.JavaConsequenceBuilder.build(JavaConsequenceBuilder.java:123)
at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:67)
at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:446)
at
org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:304)
at
org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:167)
at org.jboss.seam.drools.RuleBase.compileRuleBase(RuleBase.java:58)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:125)
at org.jboss.seam.Component.callComponentMethod(Component.java:2074)
at org.jboss.seam.Component.callCreateMethod(Component.java:1997)
at org.jboss.seam.Component.newInstance(Component.java:1968)
at org.jboss.seam.Component.getInstance(Component.java:1865)
at org.jboss.seam.Component.getInstance(Component.java:1832)
at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:55)
at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:50)
at org.jboss.seam.el.SeamELResolver.resolveBase(SeamELResolver.java:166)
at org.jboss.seam.el.SeamELResolver.getValue(SeamELResolver.java:53)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53)
at
com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64)
at org.jboss.el.parser.AstIdentifier.getValue(AstIdentifier.java:44)
at
org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
at org.jboss.seam.core.Expressions$1.getValue(Expressions.java:112)
at
org.jboss.seam.drools.ManagedWorkingMemory.getRuleBaseFromValueBinding(ManagedWorkingMemory.java:78)
at
org.jboss.seam.drools.ManagedWorkingMemory.getStatefulSession(ManagedWorkingMemory.java:67)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:125)
at org.jboss.seam.Component.callComponentMethod(Component.java:2074)
at org.jboss.seam.Component.unwrap(Component.java:2100)
at org.jboss.seam.Component.getInstance(Component.java:1879)
at org.jboss.seam.Component.getInstance(Component.java:1832)
at
org.jboss.seam.Component.getInstanceInAllNamespaces(Component.java:2174)
at org.jboss.seam.Component.getValueToInject(Component.java:2126)
at org.jboss.seam.Component.injectAttributes(Component.java:1590)
at org.jboss.seam.Component.inject(Component.java:1408)
at
org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:45)
at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at
org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42)
at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:106)
at
org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:155)
at
org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:91)
at
org.ebsinc.ia.action.AgentActi
