3:41 a.m.
Hi ,
I'm trying to use the *Exists *keyword within my rules with the following
snippet :
// Create a session
KnowledgeBaseConfiguration config =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
((RuleBaseConfiguration)config).setRuleBaseUpdateHandler( null ); *
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(config);
StatefulKnowledgeSession session = kbase.newStatefulKnowledgeSession();
// Add some objects
for (int i=0; i<5; i++) {
session.insert(new Foo());
}
// Add a DRL to the kbase
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newClassPathResource( "test/existsTest.drl" ),
ResourceType.DRL);
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
// Fire rules
int fireCount = session.fireAllRules();
*existsTest.drl* :
rule "existsTest"
when
exists (Foo());
//not ( not ( Foo() ) ); (2)
then
System.out.println("Rule fired...");
end
When launched , the rule is not fired (no messages , fireCount 0), but it is
when changing
exists with a double not condition (2).
If the working memory is populated after adding the rules file, the exists
CE works as expected.
* I've used no RuleBaseUpdateHandler preventing automatic activations to be
executed so fireAllRules can be used to get the fireCount, but commenting
this line out doesn't change the results.
Probably i'm doing something wrong so a little help would be very
appreciated.
Regards,
Manuel.
4:06 a.m.
Chivotario,
From what I understand, the activation of rules happen as facts are
inserted into the working memory; hence it is important for the session to
be begun against a knowledge base that has the rule packages loaded before
the facts are inserted.
-Visu
Chivotario Martin
<chivotario@gmail
.com> To
Sent by: rules-users(a)lists.jboss.org
rules-users-bounc cc
es(a)lists.jboss.or
g Subject
[rules-users] "Exists" CE behaviour
13/07/2009 14:11
Please respond to
Rules Users List
<rules-users@list
s.jboss.org>
Hi ,
I'm trying to use the Exists keyword within my rules with the following
snippet :
// Create a session
KnowledgeBaseConfiguration config =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
((RuleBaseConfiguration)config).setRuleBaseUpdateHandler( null ); *
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(config);
StatefulKnowledgeSession session = kbase.newStatefulKnowledgeSession();
// Add some objects
for (int i=0; i<5; i++) {
4:37 a.m.
Hi Visu,
My understanding (also tested) is that activations are created no matter the
knowledge base has the rule packages loaded
before or after the working memory is filled with facts, but the execution
of the rules happens automatically if the working memory is filled in
advance.Setting the RuleBaseUpdateHandler to null, prevents the execution of
the rules but keeps activations to be created when adding a rule to the
kbase.
In this case, it seems the exists CE only creates activations if the rules
are loaded before the working memory is populated.
But this doesn't happen if i change the statement :
exists ( Foo() ) --> not ( not ( Foo() ) )
In this case, activations are created no matter whether the kbase is empty
or not before populating the WM.
2009/7/13 Viswanathan Nageswaran <visu.nageswaran(a)in.ibm.com>
Chivotario,
>From what I understand, the activation of rules happen as facts are
inserted into the working memory; hence it is important for the session to
be begun against a knowledge base that has the rule packages loaded before
the facts are inserted.
-Visu
Chivotario Martin
<chivotario@gmail
.com> To
Sent by: rules-users(a)lists.jboss.org
rules-users-bounc cc
es(a)lists.jboss.or
g Subject
[rules-users] "Exists" CE behaviour
13/07/2009 14:11
Please respond to
Rules Users List
<rules-users@list
s.jboss.org>
Hi ,
I'm trying to use the Exists keyword within my rules with the following
snippet :
// Create a session
KnowledgeBaseConfiguration config =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
((RuleBaseConfiguration)config).setRuleBaseUpdateHandler( null ); *
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(config);
StatefulKnowledgeSession session = kbase.newStatefulKnowledgeSession();
// Add some objects
for (int i=0; i<5; i++) {
}
// Add a DRL to the kbase
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newClassPathResource( "test/existsTest.drl"
), ResourceType.DRL);
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
// Fire rules
int fireCount = session.fireAllRules();
existsTest.drl :
rule "existsTest"
( Foo() ) ); (2)
end
When launched , the rule is not fired (no messages , fireCount 0), but it
is when changing
exists with a double not condition (2).
If the working memory is populated after adding the rules file, the exists
CE works as expected.
* I've used no RuleBaseUpdateHandler preventing automatic activations to be
executed so fireAllRules can be used to get the fireCount, but commenting
this line out doesn't change the results.
Probably i'm doing something wrong so a little help would be very
appreciated.
Regards,
Manuel.
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
5:27 a.m.
Quite right, since not(not(Foo())) is equivalent to exists(Foo()).
Martin, would you please submit a JIRA?
-W
On 7/13/09, Chivotario Martin <chivotario(a)gmail.com> wrote:
Hi Visu,
My understanding (also tested) is that activations are created no matter the
knowledge base has the rule packages loaded
before or after the working memory is filled with facts, but the execution
of the rules happens automatically if the working memory is filled in
advance.Setting the RuleBaseUpdateHandler to null, prevents the execution of
the rules but keeps activations to be created when adding a rule to the
kbase.
In this case, it seems the exists CE only creates activations if the rules
are loaded before the working memory is populated.
But this doesn't happen if i change the statement :
exists ( Foo() ) --> not ( not ( Foo() ) )
In this case, activations are created no matter whether the kbase is empty
or not before populating the WM.
2009/7/13 Viswanathan Nageswaran <visu.nageswaran(a)in.ibm.com>
> Chivotario,
>
> >From what I understand, the activation of rules happen as facts are
> inserted into the working memory; hence it is important for the session to
> be begun against a knowledge base that has the rule packages loaded before
> the facts are inserted.
>
> -Visu
>
>
>
>
> Chivotario Martin
> <chivotario@gmail
> .com> To
> Sent by: rules-users(a)lists.jboss.org
> rules-users-bounc cc
> es(a)lists.jboss.or
> g Subject
> [rules-users] "Exists" CE behaviour
>
> 13/07/2009 14:11
>
>
> Please respond to
> Rules Users List
> <rules-users@list
> s.jboss.org>
>
>
>
>
>
>
>
> Hi ,
>
> I'm trying to use the Exists keyword within my rules with the following
> snippet :
>
> // Create a session
> KnowledgeBaseConfiguration config =
>
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
>
((RuleBaseConfiguration)config).setRuleBaseUpdateHandler(
null ); *
> KnowledgeBase kbase =
KnowledgeBaseFactory.newKnowledgeBase(config);
> StatefulKnowledgeSession session =
kbase.newStatefulKnowledgeSession();
>
> // Add some objects
> for (int i=0; i<5; i++) {
> }
>
>
> // Add a DRL to the kbase
> KnowledgeBuilder kbuilder =
KnowledgeBuilderFactory.newKnowledgeBuilder();
> kbuilder.add( ResourceFactory.newClassPathResource(
"test/existsTest.drl"
> ), ResourceType.DRL);
> kbase.addKnowledgePackages(
kbuilder.getKnowledgePackages() );
>
> // Fire rules
> int fireCount = session.fireAllRules();
>
>
> existsTest.drl :
>
> rule "existsTest"
> ( Foo() ) ); (2)
>
> end
>
> When launched , the rule is not fired (no messages , fireCount 0), but it
> is when changing
> exists with a double not condition (2).
> If the working memory is populated after adding the rules file, the exists
> CE works as expected.
> * I've used no RuleBaseUpdateHandler preventing automatic activations to
be
> executed so fireAllRules can be used to get the fireCount, but commenting
> this line out doesn't change the results.
>
> Probably i'm doing something wrong so a little help would be very
> appreciated.
>
> Regards,
> Manuel.
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
5:59 a.m.
Hi Wolfgang,
I do not know if i can use the issue tracker to post this as an issue, as i
don't know if i'm allowed to do so, and also if this is officially, really a
bug or the expected behaviour :) .
However i left a complete piece of code showing the behaviour i'm getting :
*RuleTester.java*
package org.drools.test;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseConfiguration;
import org.drools.KnowledgeBaseFactory;
import org.drools.RuleBaseConfiguration;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
public class RuleTester {
private static final int MAX_EVENTS = 5;
public class Foo { }
public void test() {
KnowledgeBaseConfiguration config =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
((RuleBaseConfiguration)config).setRuleBaseUpdateHandler( null );
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(config);
StatefulKnowledgeSession session =
kbase.newStatefulKnowledgeSession();
for (int i=0; i<MAX_EVENTS; i++) {
session.insert(new Foo());
}
for (int i=1; i<3; i++) {
KnowledgeBuilder kbuilder =
KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newClassPathResource(
"test"+i+".drl" ), ResourceType.DRL);
if( kbuilder.hasErrors() ) {
System.out.println( kbuilder.getErrors() );
return;
}
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
int fireCount = session.fireAllRules();
System.out.println("Test"+i+".drl , number of rules fired =
"+fireCount);
}
session.dispose();
}
public static void main(String[] args) {
RuleTester tester = new RuleTester();
tester.test();
}
}
*test1.drl*
import org.drools.test.RuleTester.Foo;
rule "notNotRule"
when
exists ( Foo() );
then
System.out.println("Rule fired...");
end
*test2.drl*
import org.drools.test.RuleTester.Foo;
rule "notNotRule"
when
not ( not ( Foo() ) );
then
System.out.println("Rule fired...");
end
Using Drools 5.0.1-Final , the expected output would be :
Test1.drl , number of rules fired = 0
Rule fired...
Test2.drl , number of rules fired = 1
If someone allows me to open this a a JIRA i would try to understand how to
use it :D and would do so.
Regards,
Manuel.
2009/7/13 Wolfgang Laun <wolfgang.laun(a)gmail.com>
Quite right, since not(not(Foo())) is equivalent to exists(Foo()).
Martin, would you please submit a JIRA?
-W
On 7/13/09, Chivotario Martin <chivotario(a)gmail.com> wrote:
> Hi Visu,
>
> My understanding (also tested) is that activations are created no matter
the
> knowledge base has the rule packages loaded
> before or after the working memory is filled with facts, but the
execution
> of the rules happens automatically if the working memory is filled in
> advance.Setting the RuleBaseUpdateHandler to null, prevents the execution
of
> the rules but keeps activations to be created when adding a rule to the
> kbase.
> In this case, it seems the exists CE only creates activations if the
rules
> are loaded before the working memory is populated.
> But this doesn't happen if i change the statement :
>
> exists ( Foo() ) --> not ( not ( Foo() ) )
>
> In this case, activations are created no matter whether the kbase is
empty
> or not before populating the WM.
>
>
>
>
> 2009/7/13 Viswanathan Nageswaran <visu.nageswaran(a)in.ibm.com>
>
> > Chivotario,
> >
> > >From what I understand, the activation of rules happen as facts are
> > inserted into the working memory; hence it is important for the session
to
> > be begun against a knowledge base that has the rule packages loaded
before
> > the facts are inserted.
> >
> > -Visu
> >
> >
> >
> >
> > Chivotario Martin
> > <chivotario@gmail
> > .com>
To
> > Sent by: rules-users(a)lists.jboss.org
> > rules-users-bounc
cc
> > es(a)lists.jboss.or
> > g
Subject
> > [rules-users] "Exists" CE
behaviour
> >
> > 13/07/2009 14:11
> >
> >
> > Please respond to
> > Rules Users List
> > <rules-users@list
> > s.jboss.org>
> >
> >
> >
> >
> >
> >
> >
> > Hi ,
> >
> > I'm trying to use the Exists keyword within my rules with the following
> > snippet :
> >
> > // Create a session
> > KnowledgeBaseConfiguration config =
> >
> KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
> >
> ((RuleBaseConfiguration)config).setRuleBaseUpdateHandler(
> null ); *
> > KnowledgeBase kbase =
> KnowledgeBaseFactory.newKnowledgeBase(config);
> > StatefulKnowledgeSession session =
> kbase.newStatefulKnowledgeSession();
> >
> > // Add some objects
> > for (int i=0; i<5; i++) {
> > }
> >
> >
> > // Add a DRL to the kbase
> > KnowledgeBuilder kbuilder =
> KnowledgeBuilderFactory.newKnowledgeBuilder();
> > kbuilder.add( ResourceFactory.newClassPathResource(
> "test/existsTest.drl"
> > ), ResourceType.DRL);
> > kbase.addKnowledgePackages(
> kbuilder.getKnowledgePackages() );
> >
> > // Fire rules
> > int fireCount = session.fireAllRules();
> >
> >
> > existsTest.drl :
> >
> > rule "existsTest"
> > ( Foo() ) ); (2)
> >
> > end
> >
> > When launched , the rule is not fired (no messages , fireCount 0), but
it
> > is when changing
> > exists with a double not condition (2).
> > If the working memory is populated after adding the rules file, the
exists
> > CE works as expected.
> > * I've used no RuleBaseUpdateHandler preventing automatic activations
to
> be
> > executed so fireAllRules can be used to get the fireCount, but
commenting
> > this line out doesn't change the results.
> >
> > Probably i'm doing something wrong so a little help would be very
> > appreciated.
> >
> > Regards,
> > Manuel.
> > _______________________________________________
> > rules-users mailing list
> > rules-users(a)lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users(a)lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
6:20 a.m.
https://jira.jboss.org/jira/browse/JBRULES-2206 created.
Thanks for the code!
-W
On 7/13/09, Chivotario Martin <chivotario(a)gmail.com> wrote:
Hi Wolfgang,
I do not know if i can use the issue tracker to post this as an issue, as i
don't know if i'm allowed to do so, and also if this is officially, really a
bug or the expected behaviour :) .
However i left a complete piece of code showing the behaviour i'm getting :
RuleTester.java
package org.drools.test;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseConfiguration;
import org.drools.KnowledgeBaseFactory;
import org.drools.RuleBaseConfiguration;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
public class RuleTester {
private static final int MAX_EVENTS = 5;
public class Foo { }
public void test() {
KnowledgeBaseConfiguration config =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
((RuleBaseConfiguration)config).setRuleBaseUpdateHandler(
null );
KnowledgeBase kbase =
KnowledgeBaseFactory.newKnowledgeBase(config);
StatefulKnowledgeSession session =
kbase.newStatefulKnowledgeSession();
for (int i=0; i<MAX_EVENTS; i++) {
session.insert(new Foo());
}
for (int i=1; i<3; i++) {
KnowledgeBuilder kbuilder =
KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(
ResourceFactory.newClassPathResource( "test"+i+".drl" ),
ResourceType.DRL);
if( kbuilder.hasErrors() ) {
System.out.println( kbuilder.getErrors() );
return;
}
kbase.addKnowledgePackages(
kbuilder.getKnowledgePackages() );
int fireCount = session.fireAllRules();
System.out.println("Test"+i+".drl , number of
rules fired = "+fireCount);
}
session.dispose();
}
public static void main(String[] args) {
RuleTester tester = new RuleTester();
tester.test();
}
}
test1.drl
import org.drools.test.RuleTester.Foo;
rule "notNotRule"
when
exists ( Foo() );
then
System.out.println("Rule fired...");
end
test2.drl
import org.drools.test.RuleTester.Foo;
rule "notNotRule"
when
not ( not ( Foo() ) );
then
System.out.println("Rule fired...");
end
Using Drools 5.0.1-Final , the expected output would be :
> Test1.drl , number of rules fired = 0
> Rule fired...
> Test2.drl , number of rules fired = 1
If someone allows me to open this a a JIRA i would try to understand how to
use it :D and would do so.
Regards,
Manuel.
2009/7/13 Wolfgang Laun <wolfgang.laun(a)gmail.com>
> Quite right, since not(not(Foo())) is equivalent to exists(Foo()).
>
> Martin, would you please submit a JIRA?
>
> -W
>
>
>
>
>
> On 7/13/09, Chivotario Martin <chivotario(a)gmail.com> wrote:
> > Hi Visu,
> >
> > My understanding (also tested) is that activations are created no matter
the
> > knowledge base has the rule packages loaded
> > before or after the working memory is filled with facts, but the
execution
> > of the rules happens automatically if the working memory is filled in
> > advance.Setting the RuleBaseUpdateHandler to null, prevents the
execution of
> > the rules but keeps activations to be created when adding a rule to the
> > kbase.
> > In this case, it seems the exists CE only creates activations if the
rules
> > are loaded before the working memory is populated.
> > But this doesn't happen if i change the statement :
> >
> > exists ( Foo() ) --> not ( not ( Foo() ) )
> >
> > In this case, activations are created no matter whether the kbase is
empty
> > or not before populating the WM.
> >
> >
> >
> >
> > 2009/7/13 Viswanathan Nageswaran <visu.nageswaran(a)in.ibm.com>
> >
> > > Chivotario,
> > >
> > > >From what I understand, the activation of rules happen as facts are
> > > inserted into the working memory; hence it is important for the
session to
> > > be begun against a knowledge base that has the rule packages loaded
before
> > > the facts are inserted.
> > >
> > > -Visu
> > >
> > >
> > >
> > >
> > > Chivotario Martin
> > > <chivotario@gmail
> > > .com>
To
> > > Sent by: rules-users(a)lists.jboss.org
> > > rules-users-bounc
cc
> > > es(a)lists.jboss.or
> > > g
Subject
> > > [rules-users] "Exists" CE
behaviour
> > >
> > > 13/07/2009 14:11
> > >
> > >
> > > Please respond to
> > > Rules Users List
> > > <rules-users@list
> > > s.jboss.org>
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Hi ,
> > >
> > > I'm trying to use the Exists keyword within my rules with the
following
> > > snippet :
> > >
> > > // Create a session
> > > KnowledgeBaseConfiguration config =
> > >
> >
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
> > >
> >
((RuleBaseConfiguration)config).setRuleBaseUpdateHandler(
> > null ); *
> > > KnowledgeBase kbase =
> > KnowledgeBaseFactory.newKnowledgeBase(config);
> > > StatefulKnowledgeSession session =
> > kbase.newStatefulKnowledgeSession();
> > >
> > > // Add some objects
> > > for (int i=0; i<5; i++) {
> > > }
> > >
> > >
> > > // Add a DRL to the kbase
> > > KnowledgeBuilder kbuilder =
> > KnowledgeBuilderFactory.newKnowledgeBuilder();
> > > kbuilder.add( ResourceFactory.newClassPathResource(
> > "test/existsTest.drl"
> > > ), ResourceType.DRL);
> > > kbase.addKnowledgePackages(
> > kbuilder.getKnowledgePackages() );
> > >
> > > // Fire rules
> > > int fireCount = session.fireAllRules();
> > >
> > >
> > > existsTest.drl :
> > >
> > > rule "existsTest"
> > > ( Foo() ) ); (2)
> > >
> > > end
> > >
> > > When launched , the rule is not fired (no messages , fireCount 0), but
it
> > > is when changing
> > > exists with a double not condition (2).
> > > If the working memory is populated after adding the rules file, the
exists
> > > CE works as expected.
> > > * I've used no RuleBaseUpdateHandler preventing automatic activations
to
> > be
> > > executed so fireAllRules can be used to get the fireCount, but
commenting
> > > this line out doesn't change the results.
> > >
> > > Probably i'm doing something wrong so a little help would be very
> > > appreciated.
> > >
> > > Regards,
> > > Manuel.
> > > _______________________________________________
> > > rules-users mailing list
> > > rules-users(a)lists.jboss.org
> > > https://lists.jboss.org/mailman/listinfo/rules-users
> > >
> > >
> > >
> > > _______________________________________________
> > > rules-users mailing list
> > > rules-users(a)lists.jboss.org
> > > https://lists.jboss.org/mailman/listinfo/rules-users
> > >
> >
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users(a)lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
7:35 a.m.
Hi Wolfgang,
Just seen the JIRA Issue it seems test1.drl got some copy-paste problems ,
because both rules are present :D.
However, thanks for creating the issue !
Regards,
Manuel.
2009/7/13 Wolfgang Laun <wolfgang.laun(a)gmail.com>
https://jira.jboss.org/jira/browse/JBRULES-2206 created.
Thanks for the code!
-W
On 7/13/09, Chivotario Martin <chivotario(a)gmail.com> wrote:
> Hi Wolfgang,
>
> I do not know if i can use the issue tracker to post this as an issue, as
i
> don't know if i'm allowed to do so, and also if this is officially,
really a
> bug or the expected behaviour :) .
>
> However i left a complete piece of code showing the behaviour i'm getting
:
>
> RuleTester.java
>
> package org.drools.test;
>
> import org.drools.KnowledgeBase;
> import org.drools.KnowledgeBaseConfiguration;
> import org.drools.KnowledgeBaseFactory;
> import org.drools.RuleBaseConfiguration;
> import org.drools.builder.KnowledgeBuilder;
> import org.drools.builder.KnowledgeBuilderFactory;
> import org.drools.builder.ResourceType;
> import org.drools.io.ResourceFactory;
> import org.drools.runtime.StatefulKnowledgeSession;
>
> public class RuleTester {
>
> private static final int MAX_EVENTS = 5;
>
> public class Foo { }
>
> public void test() {
>
> KnowledgeBaseConfiguration config =
> KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
>
> ((RuleBaseConfiguration)config).setRuleBaseUpdateHandler(
> null );
> KnowledgeBase kbase =
> KnowledgeBaseFactory.newKnowledgeBase(config);
>
> StatefulKnowledgeSession session =
> kbase.newStatefulKnowledgeSession();
>
> for (int i=0; i<MAX_EVENTS; i++) {
> session.insert(new Foo());
> }
>
> for (int i=1; i<3; i++) {
> KnowledgeBuilder kbuilder =
> KnowledgeBuilderFactory.newKnowledgeBuilder();
> kbuilder.add(
> ResourceFactory.newClassPathResource( "test"+i+".drl" ),
> ResourceType.DRL);
>
> if( kbuilder.hasErrors() ) {
> System.out.println( kbuilder.getErrors() );
> return;
> }
>
> kbase.addKnowledgePackages(
> kbuilder.getKnowledgePackages() );
>
> int fireCount = session.fireAllRules();
>
> System.out.println("Test"+i+".drl , number of
> rules fired = "+fireCount);
>
> }
>
> session.dispose();
>
> }
>
> public static void main(String[] args) {
> RuleTester tester = new RuleTester();
> tester.test();
> }
>
> }
>
>
> test1.drl
>
> import org.drools.test.RuleTester.Foo;
>
> rule "notNotRule"
> when
> exists ( Foo() );
> then
> System.out.println("Rule fired...");
> end
>
> test2.drl
>
> import org.drools.test.RuleTester.Foo;
>
> rule "notNotRule"
> when
> not ( not ( Foo() ) );
> then
> System.out.println("Rule fired...");
> end
>
>
> Using Drools 5.0.1-Final , the expected output would be :
>
> > Test1.drl , number of rules fired = 0
> > Rule fired...
> > Test2.drl , number of rules fired = 1
>
> If someone allows me to open this a a JIRA i would try to understand how
to
> use it :D and would do so.
>
> Regards,
> Manuel.
>
>
> 2009/7/13 Wolfgang Laun <wolfgang.laun(a)gmail.com>
>
> > Quite right, since not(not(Foo())) is equivalent to exists(Foo()).
> >
> > Martin, would you please submit a JIRA?
> >
> > -W
> >
> >
> >
> >
> >
> > On 7/13/09, Chivotario Martin <chivotario(a)gmail.com> wrote:
> > > Hi Visu,
> > >
> > > My understanding (also tested) is that activations are created no
matter
> the
> > > knowledge base has the rule packages loaded
> > > before or after the working memory is filled with facts, but the
> execution
> > > of the rules happens automatically if the working memory is filled in
> > > advance.Setting the RuleBaseUpdateHandler to null, prevents the
> execution of
> > > the rules but keeps activations to be created when adding a rule to
the
> > > kbase.
> > > In this case, it seems the exists CE only creates activations if the
> rules
> > > are loaded before the working memory is populated.
> > > But this doesn't happen if i change the statement :
> > >
> > > exists ( Foo() ) --> not ( not ( Foo() ) )
> > >
> > > In this case, activations are created no matter whether the kbase is
> empty
> > > or not before populating the WM.
> > >
> > >
> > >
> > >
> > > 2009/7/13 Viswanathan Nageswaran <visu.nageswaran(a)in.ibm.com>
> > >
> > > > Chivotario,
> > > >
> > > > >From what I understand, the activation of rules happen as facts
are
> > > > inserted into the working memory; hence it is important for the
> session to
> > > > be begun against a knowledge base that has the rule packages loaded
> before
> > > > the facts are inserted.
> > > >
> > > > -Visu
> > > >
> > > >
> > > >
> > > >
> > > > Chivotario Martin
> > > > <chivotario@gmail
> > > > .com>
> To
> > > > Sent by: rules-users(a)lists.jboss.org
> > > > rules-users-bounc
> cc
> > > > es(a)lists.jboss.or
> > > > g
> Subject
> > > > [rules-users]
"Exists" CE
> behaviour
> > > >
> > > > 13/07/2009 14:11
> > > >
> > > >
> > > > Please respond to
> > > > Rules Users List
> > > > <rules-users@list
> > > > s.jboss.org>
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > Hi ,
> > > >
> > > > I'm trying to use the Exists keyword within my rules with the
> following
> > > > snippet :
> > > >
> > > > // Create a session
> > > > KnowledgeBaseConfiguration config =
> > > >
> > >
> KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
> > > >
> > >
> ((RuleBaseConfiguration)config).setRuleBaseUpdateHandler(
> > > null ); *
> > > > KnowledgeBase kbase =
> > > KnowledgeBaseFactory.newKnowledgeBase(config);
> > > > StatefulKnowledgeSession session =
> > > kbase.newStatefulKnowledgeSession();
> > > >
> > > > // Add some objects
> > > > for (int i=0; i<5; i++) {
> > > > }
> > > >
> > > >
> > > > // Add a DRL to the kbase
> > > > KnowledgeBuilder kbuilder =
> > > KnowledgeBuilderFactory.newKnowledgeBuilder();
> > > > kbuilder.add( ResourceFactory.newClassPathResource(
> > > "test/existsTest.drl"
> > > > ), ResourceType.DRL);
> > > > kbase.addKnowledgePackages(
> > > kbuilder.getKnowledgePackages() );
> > > >
> > > > // Fire rules
> > > > int fireCount = session.fireAllRules();
> > > >
> > > >
> > > > existsTest.drl :
> > > >
> > > > rule "existsTest"
> > > > ( Foo() ) ); (2)
> > > >
> > > > end
> > > >
> > > > When launched , the rule is not fired (no messages , fireCount 0),
but
> it
> > > > is when changing
> > > > exists with a double not condition (2).
> > > > If the working memory is populated after adding the rules file, the
> exists
> > > > CE works as expected.
> > > > * I've used no RuleBaseUpdateHandler preventing automatic
activations
> to
> > > be
> > > > executed so fireAllRules can be used to get the fireCount, but
> commenting
> > > > this line out doesn't change the results.
> > > >
> > > > Probably i'm doing something wrong so a little help would be
very
> > > > appreciated.
> > > >
> > > > Regards,
> > > > Manuel.
> > > > _______________________________________________
> > > > rules-users mailing list
> > > > rules-users(a)lists.jboss.org
> > > > https://lists.jboss.org/mailman/listinfo/rules-users
> > > >
> > > >
> > > >
> > > > _______________________________________________
> > > > rules-users mailing list
> > > > rules-users(a)lists.jboss.org
> > > > https://lists.jboss.org/mailman/listinfo/rules-users
> > > >
> > >
> > >
> > > _______________________________________________
> > > rules-users mailing list
> > > rules-users(a)lists.jboss.org
> > > https://lists.jboss.org/mailman/listinfo/rules-users
> > >
> > >
> > _______________________________________________
> > rules-users mailing list
> > rules-users(a)lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
8:16 a.m.
I changed the rule names intentionally. It shouldn't matter, for the
test, whether both are present or the second load overrides the 1st
rule.
-W
On 7/13/09, Chivotario Martin <chivotario(a)gmail.com> wrote:
Hi Wolfgang,
Just seen the JIRA Issue it seems test1.drl got some copy-paste problems ,
because both rules are present :D.
However, thanks for creating the issue !
Regards,
Manuel.
2009/7/13 Wolfgang Laun <wolfgang.laun(a)gmail.com>
> https://jira.jboss.org/jira/browse/JBRULES-2206 created.
>
> Thanks for the code!
> -W
>
> On 7/13/09, Chivotario Martin <chivotario(a)gmail.com> wrote:
> > Hi Wolfgang,
> >
> > I do not know if i can use the issue tracker to post this as an issue,
> > as
> i
> > don't know if i'm allowed to do so, and also if this is officially,
> really a
> > bug or the expected behaviour :) .
> >
> > However i left a complete piece of code showing the behaviour i'm
> > getting
> :
> >
> > RuleTester.java
> >
> > package org.drools.test;
> >
> > import org.drools.KnowledgeBase;
> > import org.drools.KnowledgeBaseConfiguration;
> > import org.drools.KnowledgeBaseFactory;
> > import org.drools.RuleBaseConfiguration;
> > import org.drools.builder.KnowledgeBuilder;
> > import org.drools.builder.KnowledgeBuilderFactory;
> > import org.drools.builder.ResourceType;
> > import org.drools.io.ResourceFactory;
> > import org.drools.runtime.StatefulKnowledgeSession;
> >
> > public class RuleTester {
> >
> > private static final int MAX_EVENTS = 5;
> >
> > public class Foo { }
> >
> > public void test() {
> >
> > KnowledgeBaseConfiguration config =
> > KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
> >
> > ((RuleBaseConfiguration)config).setRuleBaseUpdateHandler(
> > null );
> > KnowledgeBase kbase =
> > KnowledgeBaseFactory.newKnowledgeBase(config);
> >
> > StatefulKnowledgeSession session =
> > kbase.newStatefulKnowledgeSession();
> >
> > for (int i=0; i<MAX_EVENTS; i++) {
> > session.insert(new Foo());
> > }
> >
> > for (int i=1; i<3; i++) {
> > KnowledgeBuilder kbuilder =
> > KnowledgeBuilderFactory.newKnowledgeBuilder();
> > kbuilder.add(
> > ResourceFactory.newClassPathResource( "test"+i+".drl" ),
> > ResourceType.DRL);
> >
> > if( kbuilder.hasErrors() ) {
> > System.out.println( kbuilder.getErrors() );
> > return;
> > }
> >
> > kbase.addKnowledgePackages(
> > kbuilder.getKnowledgePackages() );
> >
> > int fireCount = session.fireAllRules();
> >
> > System.out.println("Test"+i+".drl , number of
> > rules fired = "+fireCount);
> >
> > }
> >
> > session.dispose();
> >
> > }
> >
> > public static void main(String[] args) {
> > RuleTester tester = new RuleTester();
> > tester.test();
> > }
> >
> > }
> >
> >
> > test1.drl
> >
> > import org.drools.test.RuleTester.Foo;
> >
> > rule "notNotRule"
> > when
> > exists ( Foo() );
> > then
> > System.out.println("Rule fired...");
> > end
> >
> > test2.drl
> >
> > import org.drools.test.RuleTester.Foo;
> >
> > rule "notNotRule"
> > when
> > not ( not ( Foo() ) );
> > then
> > System.out.println("Rule fired...");
> > end
> >
> >
> > Using Drools 5.0.1-Final , the expected output would be :
> >
> > > Test1.drl , number of rules fired = 0
> > > Rule fired...
> > > Test2.drl , number of rules fired = 1
> >
> > If someone allows me to open this a a JIRA i would try to understand how
> to
> > use it :D and would do so.
> >
> > Regards,
> > Manuel.
> >
> >
> > 2009/7/13 Wolfgang Laun <wolfgang.laun(a)gmail.com>
> >
> > > Quite right, since not(not(Foo())) is equivalent to exists(Foo()).
> > >
> > > Martin, would you please submit a JIRA?
> > >
> > > -W
> > >
> > >
> > >
> > >
> > >
> > > On 7/13/09, Chivotario Martin <chivotario(a)gmail.com> wrote:
> > > > Hi Visu,
> > > >
> > > > My understanding (also tested) is that activations are created no
> matter
> > the
> > > > knowledge base has the rule packages loaded
> > > > before or after the working memory is filled with facts, but the
> > execution
> > > > of the rules happens automatically if the working memory is filled
> > > > in
> > > > advance.Setting the RuleBaseUpdateHandler to null, prevents the
> > execution of
> > > > the rules but keeps activations to be created when adding a rule to
> the
> > > > kbase.
> > > > In this case, it seems the exists CE only creates activations if the
> > rules
> > > > are loaded before the working memory is populated.
> > > > But this doesn't happen if i change the statement :
> > > >
> > > > exists ( Foo() ) --> not ( not ( Foo() ) )
> > > >
> > > > In this case, activations are created no matter whether the kbase is
> > empty
> > > > or not before populating the WM.
> > > >
> > > >
> > > >
> > > >
> > > > 2009/7/13 Viswanathan Nageswaran <visu.nageswaran(a)in.ibm.com>
> > > >
> > > > > Chivotario,
> > > > >
> > > > > >From what I understand, the activation of rules happen as
facts
> are
> > > > > inserted into the working memory; hence it is important for the
> > session to
> > > > > be begun against a knowledge base that has the rule packages
> > > > > loaded
> > before
> > > > > the facts are inserted.
> > > > >
> > > > > -Visu
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > Chivotario Martin
> > > > > <chivotario@gmail
> > > > > .com>
> > To
> > > > > Sent by:
rules-users(a)lists.jboss.org
> > > > > rules-users-bounc
> > cc
> > > > > es(a)lists.jboss.or
> > > > > g
> > Subject
> > > > > [rules-users]
"Exists" CE
> > behaviour
> > > > >
> > > > > 13/07/2009 14:11
> > > > >
> > > > >
> > > > > Please respond to
> > > > > Rules Users List
> > > > > <rules-users@list
> > > > > s.jboss.org>
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > Hi ,
> > > > >
> > > > > I'm trying to use the Exists keyword within my rules with
the
> > following
> > > > > snippet :
> > > > >
> > > > > // Create a session
> > > > > KnowledgeBaseConfiguration config =
> > > > >
> > > >
> > KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
> > > > >
> > > >
> > ((RuleBaseConfiguration)config).setRuleBaseUpdateHandler(
> > > > null ); *
> > > > > KnowledgeBase kbase =
> > > > KnowledgeBaseFactory.newKnowledgeBase(config);
> > > > > StatefulKnowledgeSession session =
> > > > kbase.newStatefulKnowledgeSession();
> > > > >
> > > > > // Add some objects
> > > > > for (int i=0; i<5; i++) {
> > > > > }
> > > > >
> > > > >
> > > > > // Add a DRL to the kbase
> > > > > KnowledgeBuilder kbuilder =
> > > > KnowledgeBuilderFactory.newKnowledgeBuilder();
> > > > > kbuilder.add( ResourceFactory.newClassPathResource(
> > > > "test/existsTest.drl"
> > > > > ), ResourceType.DRL);
> > > > > kbase.addKnowledgePackages(
> > > > kbuilder.getKnowledgePackages() );
> > > > >
> > > > > // Fire rules
> > > > > int fireCount = session.fireAllRules();
> > > > >
> > > > >
> > > > > existsTest.drl :
> > > > >
> > > > > rule "existsTest"
> > > > > ( Foo() ) ); (2)
> > > > >
> > > > > end
> > > > >
> > > > > When launched , the rule is not fired (no messages , fireCount
0),
> but
> > it
> > > > > is when changing
> > > > > exists with a double not condition (2).
> > > > > If the working memory is populated after adding the rules file,
> > > > > the
> > exists
> > > > > CE works as expected.
> > > > > * I've used no RuleBaseUpdateHandler preventing automatic
> activations
> > to
> > > > be
> > > > > executed so fireAllRules can be used to get the fireCount, but
> > commenting
> > > > > this line out doesn't change the results.
> > > > >
> > > > > Probably i'm doing something wrong so a little help would be
very
> > > > > appreciated.
> > > > >
> > > > > Regards,
> > > > > Manuel.
> > > > > _______________________________________________
> > > > > rules-users mailing list
> > > > > rules-users(a)lists.jboss.org
> > > > > https://lists.jboss.org/mailman/listinfo/rules-users
> > > > >
> > > > >
> > > > >
> > > > > _______________________________________________
> > > > > rules-users mailing list
> > > > > rules-users(a)lists.jboss.org
> > > > > https://lists.jboss.org/mailman/listinfo/rules-users
> > > > >
> > > >
> > > >
> > > > _______________________________________________
> > > > rules-users mailing list
> > > > rules-users(a)lists.jboss.org
> > > > https://lists.jboss.org/mailman/listinfo/rules-users
> > > >
> > > >
> > > _______________________________________________
> > > rules-users mailing list
> > > rules-users(a)lists.jboss.org
> > > https://lists.jboss.org/mailman/listinfo/rules-users
> > >
> >
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users(a)lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
6115
days inactive
6115
days old
7 comments
3 participants
participants (3)
-
Chivotario Martin -
Viswanathan Nageswaran -
Wolfgang Laun