[rules-users] Question on Rule Flow and Web Console
Hi All, I have a question about rule flow and web console: - Can we create a Rule Flow scenario in which the User tasks in it is dynamic. I created a Rule Flow usingFluent Api but what will happen is that in this case I wont have a single Rule Flow scenario with dynamic number of user tasks I ended up by having multiple scenarios. I used also the ForEach loop but what happened is that the user tasks are all created at the same level. what i am looking to is to have according to certain parameter of (2) for example start task 1 task 2 end if the parameter value is (3) then I will have start task 1 task 2 task 3 end Can this be achieved in Rule Flow ??? And if it Cant?? is there any Alternative ??? -- View this message in context: http://old.nabble.com/Question-on-Rule-Flow-and-Web-Console-tp26508838p26508838.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] Activation groups (xor-group)
Please could someone clarify exactly how activation-groups work. My understanding of them is that if a set of rules are all in the same activation group then only one of them will fire. Is this correct? In particular what happens if a rule becomes deactivated, can another rule in the same activation-group then fire? Thanks, Thomas This message is confidential and intended only for the addressee. If you have received this message in error, please immediately notify the postmas...@nds.com and delete it from your system as well as any copies. The content of e-mails as well as traffic data may be monitored by NDS for employment and security purposes. To protect the environment please do not print this e-mail unless necessary. An NDS Group Limited company. www.nds.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] StatefulKnowledgeSession Vs StatefulSession
I used a KnowledgeBuilder ro read the resources (DSL DSLR files) Then created a KnowledgeBase and created a StatefulKnowledgeSession out of the KnowledgeBase. The StatefulKnowledgeSession was used to start the process and fire all rules. Then I realized I was not able to access the RuleBase from StatefulKnowledgeSession. So, now I create a RuleBase, then a PackageBuilder, add the resources to the packageBuilder, then add the package to the RuleBase and create a StatefulSession out of the RuleBase. This statefulsession is used to start the process and fire all rules. Can someone explain to me whats the difference in the above 2 methods of firing the rules. Whats the difference between StatefulKnowledgeSession StatefulSession. -- View this message in context: http://old.nabble.com/StatefulKnowledgeSession-Vs-StatefulSession-tp26511606p26511606.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] RESTful Example
All,
First, I apologize long email. I have a few questions on how to use RESTful web
Service on Execution Server. I have read through the document and followed the
instruction. I think I missed a few critical steps. Here are what I did.
1) Created package, category, rule, a java class (Referral as fact).
Class Referral {
String homeState;
String servviceType;
String stateLicenseNumber;
...
}
2) Used Test Scenarios tool to test rule. Everything worked perfectly.
3) Installed Execution Server in JBoss.
4) Added a mytest.properties file under
\drools-5.0-guvnor-standalone\jboss-4.2.3.GA\server\default\deploy\drools-server.war\WEB-INF\classes\
change-set xmlns='http://drools.org/drools-5.0/change-set';
xmlns:xs='http://www.w3.org/2001/XMLSchema-instance'
xs:schemaLocation='http://drools.org/drools-5.0/change-set
drools-change-set-5.0.xsd'
add
resource source=http://localhost:8080/DroolsDemo_sfasdfasd.pkg
type='PKG' /
/add
/change-set
5) Add jar file for above java class in lib directory.
6) Created java class to call mytest RESTful service.
PostMethod method = new
PostMethod(http://localhost:8080/drools-server/knowledgebase/mytest;);
method.setRequestHeader(Cache-Control, no-cache);
method.setRequestHeader(Accept,text/xml);
method.setRequestHeader(Content-Encoding,UTF-8);
try{
File f = new File(Request.xml);
method.setRequestBody(new FileInputStream(f));
}catch(Exception e){
}
Request.xml content is:
knowledgebase-request
globals
/globals
inOutFacts
named-fact
idtestFact/id
fact class=Drools.ReferralDetail
homeStateFL/homeState
serviceTypeHH/serviceType
stateLicenseNumber/stateLicenseNumber
/fact
/named-fact
/inOutFacts
/knowledgebase-request
I got RuleBase mytest not known or is not valid.
Here are my questions:
1) Did I miss any other steps? Anything I did wrong?
2) If I run execution server on different server, where I should put pkg
file and how to make necessary changes to mytest.properties?
Sorry for long email. Appreciate your help and Happy Holidays.
Tony
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[rules-users] RESTful Example
All,
First, I apologize long email. I have a few questions on how
to use RESTful web Service on Execution Server. I have read through the
document and followed the instruction. I think I missed a few critical steps.
Here are what I did.
1)
Created package, category, rule, a java class
(Referral as fact).
Class Referral {
String homeState;
String servviceType;
String stateLicenseNumber;
…
}
2)
Used Test Scenarios tool to test rule.
Everything worked perfectly.
3)
Installed Execution Server in JBoss.
4)
Added a mytest.properties file under
\drools-5.0-guvnor-standalone\jboss-4.2.3.GA\server\default\deploy\drools-server.war\WEB-INF\classes\
change-set
xmlns='http://drools.org/drools-5.0/change-set';
xmlns:xs='http://www.w3.org/2001/XMLSchema-instance'
xs:schemaLocation='http://drools.org/drools-5.0/change-set
drools-change-set-5.0.xsd'
add
resource source=http://localhost:8080/DroolsDemo_sfasdfasd.pkg
type='PKG' /
/add
/change-set
5) Add jar file for above java
class in lib directory.
6)
Created java class to call mytest RESTful
service.
PostMethod
method = new
PostMethod(http://localhost:8080/drools-server/knowledgebase/mytest;);
method.setRequestHeader(Cache-Control, no-cache);
method.setRequestHeader(Accept,text/xml);
method.setRequestHeader(Content-Encoding,UTF-8);
try{
File f = new File(Request.xml);
method.setRequestBody(new
FileInputStream(f));
}catch(Exception e){
}
Request.xml content is:
knowledgebase-request
globals
/globals
inOutFacts
named-fact
idtestFact/id
fact class=Drools.ReferralDetail
homeStateFL/homeState
serviceTypeHH/serviceType
stateLicenseNumber/stateLicenseNumber
/fact
/named-fact
/inOutFacts
/knowledgebase-request
I got RuleBase mytest not known
or is not valid.
Here are my questions:
1)
Did I miss any other steps? Anything I did
wrong?
2)
If I run execution server on different
server, where I should put pkg file and how to make necessary changes to
mytest.properties?
Appreciate your help and Happy
Holidays.
Tony
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Re: [rules-users] Question on Rule Flow and Web Console
How about simply adding an XOR split node after the second node that checks the value of the parameter? Or adding a ruleset node there and they use rules to create this human task if necessary? A more advanced way to model this would be to use dynamic or ad-hoc processes. At this point you could easily have a rule that describes in which situation a task should be created (which is already possible now) but it will also allow you to wait for the completion of these dynamically created tasks. But we are currently still working on this type of processes, so it's still in experimental phase. Kris Quoting ramram8 ramram...@gmail.com: Hi All, I have a question about rule flow and web console: - Can we create a Rule Flow scenario in which the User tasks in it is dynamic. I created a Rule Flow usingFluent Api but what will happen is that in this case I wont have a single Rule Flow scenario with dynamic number of user tasks I ended up by having multiple scenarios. I used also the ForEach loop but what happened is that the user tasks are all created at the same level. what i am looking to is to have according to certain parameter of (2) for example start task 1 task 2 end if the parameter value is (3) then I will have start task 1 task 2 task 3 end Can this be achieved in Rule Flow ??? And if it Cant?? is there any Alternative ??? -- View this message in context: http://old.nabble.com/Question-on-Rule-Flow-and-Web-Console-tp26508838p26508838.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 Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] StatefulKnowledgeSession Vs StatefulSession
DeepakA wrote: I used a KnowledgeBuilder ro read the resources (DSL DSLR files) Then created a KnowledgeBase and created a StatefulKnowledgeSession out of the KnowledgeBase. The StatefulKnowledgeSession was used to start the process and fire all rules. Then I realized I was not able to access the RuleBase from StatefulKnowledgeSession. So, now I create a RuleBase, then a PackageBuilder, add the resources to the packageBuilder, then add the package to the RuleBase and create a StatefulSession out of the RuleBase. This statefulsession is used to start the process and fire all rules. packagebuilder is the old api, knowledgebuilder is the new one Can someone explain to me whats the difference in the above 2 methods of firing the rules. Whats the difference between StatefulKnowledgeSession StatefulSession. statefulession is the old api. these old apis are kept around for backwards compatability. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Flow (human task) and web apps
Quoting ramram8 ramram...@gmail.com: Concerning this point the JNDI seems to be a good idea but in case I cant use the JNDI is there any alternative Any solution that would allow an external application and console to share the same session would work. I used the XML dumper and changed the dynamic process to XML but can you help with a reference to a sample JAVA code that can be used to upload an xml file into Guvnor and build the file in order to use it in the GWT web application I guess the best way is to look at the Guvnor JUnit tests, there must be some tests that should features like this. You could also mount Guvnor on your file system (using WebDAV), so uploading would be the same as writing a file to disk. Kris Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools Flow 5.1 - Update JPA Entity - while workitem is in pending state - variable persistence strategy
Quoting Vijay K Pandey vpan...@mdes.ms.gov: c)I would like to change it through Drools Process because that's where I have associated the JPA entities - I would not like to update it from outside. Not sure this is a problem. You merely create an association to these JPA entities (assuming we implement the pluggable persistence strategy here as well). And the engine is only interested in the start and completion of the work item, not really in anything that happens in between. So I don't think updating the JPA entities from outside the engine should be considered a problem. In theory you could easily update the work item, we simply don't have a command for that implemented. If you would write a command that can then be executed inside a transaction using the JPA command service, those changes would be persisted. Kris Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] StatefulKnowledgeSession Vs StatefulSession
So how can I access RuleBase from StatefulKnowledgeSession? I cant find a API that links RuleBase and StatefulKnowledgeSession interface. I need to get hold of each individual rule from StatefulKnowledgeSession DeepakA wrote: I used a KnowledgeBuilder ro read the resources (DSL DSLR files) Then created a KnowledgeBase and created a StatefulKnowledgeSession out of the KnowledgeBase. The StatefulKnowledgeSession was used to start the process and fire all rules. Then I realized I was not able to access the RuleBase from StatefulKnowledgeSession. So, now I create a RuleBase, then a PackageBuilder, add the resources to the packageBuilder, then add the package to the RuleBase and create a StatefulSession out of the RuleBase. This statefulsession is used to start the process and fire all rules. Can someone explain to me whats the difference in the above 2 methods of firing the rules. Whats the difference between StatefulKnowledgeSession StatefulSession. -- View this message in context: http://old.nabble.com/StatefulKnowledgeSession-Vs-StatefulSession-tp26511606p26515717.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] Drools bootcamp schedules
Hello all, Is there a list of scheduled boot camps with dates/locations anywhere? I can't seem to find it on the site/blog. Thanks, Chris ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] GUI help
Hi! I have some questions about the guided editor. I try to build a rule in the guided editor. I added some conditions and this is the generated DRL: Rule grafikus dialect mvel when orvosimeres$Adattipus( ertek == /heart_rate ) orvosimeres$Mertadat( mertekegyseg == /min , mozgas == true , vernyomas ( 140 ) , vernyomas ( 180 ) ) then end My imports in the rule.package file are the following: package orvosi; import orvosi.orvosimeres.Adattipus; import orvosi.orvosimeres.Mertadat; And I have this error message: unknown:4:2 Unexpected token 'orvosimeres' . So that is my first question. What can cause the problem? And my other question is, how can I execute a rule, that was made in the guided editor? Thanks in advance for the reply! -- View this message in context: http://old.nabble.com/GUI-help-tp26518461p26518461.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] FW: Rule runs twice without explicit call to update($fact).
I never got an answer, any answer to this question. I really need to know if
PropertyChangeSupport actually works. Is anyone out there successfully using
it?
In one case (using modify()) I get a NPE. In all cases, the rules run twice
unless I explicitly call update(). Is anyone *not* seeing this behaviour?
Is anyone successfully using the PropertyChangeSupport mechanism without
explicit calls to update()???
Jason Smith
From: Jason Smith
Sent: Monday, November 23, 2009 12:36 PM
To: rules-users@lists.jboss.org
Subject: Rule runs twice without explicit call to update($fact).
My colleague has confirmed that this behavior has been around since Drools 4,
and it continues to be a problem for Drools 5.0.1 and 5.1.0.M1, assuming it's a
problem and not working as intended.
$fact.setPath(...) implements the correct PropertyChangeSupport mechanism for
Drools. At least Drools is using it and responding mostly as expected.
This runs once:
rule Constrain to owner or published to public
when
$fact : ListFact(
$path : path not matches .*owner.*,
noopResponse == true
)
$model : Model()
then
modify($fact)
{
setPath($fact.getPath() + [owner])
}
update($fact);
end
This runs twice:
rule Constrain to owner or published to public
when
$fact : ListFact(
$path : path not matches .*owner.*,
noopResponse == true
)
$model : Model()
then
modify($fact)
{
setPath($fact.getPath() + [owner])
}
end
If I don't use modify(...) and simply change the $fact bean path property, the
same thing occurs. If I explicitly call update($fact), the rule runs once. If
I don't it runs twice.
I get /path[owner][owner] when I actually wanted /path[owner], because it
ran twice, not once.
Why doe update(...) work differently from the PropertyChangeSupport
mechanism??? Shouldn't I be able to depend on Drools to run this rule only one
time?
I am, admittedly, a bit of a noob at this, but I ran this by my local Drools
resident expert, and he doesn't know the answer either.
Thanks so much!
Jason Smith
Software Engineer
InfoTrust Group, Inc.
500 Discovery Parkway, Suite 200
Superior, CO 80027
Office 303-627-6571
Fax 303-666-6711
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Re: [rules-users] GUI help
I thing it is because you use twice the same variable ovosimeres your rule should be Rule grafikus dialect mvel when orvosimeres:Adattipus( ertek == /heart_rate ) orvosimeres2:Mertadat( mertekegyseg == /min , mozgas == true , vernyomas ( 140 ) , vernyomas ( 180 ) ) then end 2009/11/25 SzA84 szepesiand...@citromail.hu Hi! I have some questions about the guided editor. I try to build a rule in the guided editor. I added some conditions and this is the generated DRL: Rule grafikus dialect mvel when orvosimeres$Adattipus( ertek == /heart_rate ) orvosimeres$Mertadat( mertekegyseg == /min , mozgas == true , vernyomas ( 140 ) , vernyomas ( 180 ) ) then end My imports in the rule.package file are the following: package orvosi; import orvosi.orvosimeres.Adattipus; import orvosi.orvosimeres.Mertadat; And I have this error message: unknown:4:2 Unexpected token 'orvosimeres' . So that is my first question. What can cause the problem? And my other question is, how can I execute a rule, that was made in the guided editor? Thanks in advance for the reply! -- View this message in context: http://old.nabble.com/GUI-help-tp26518461p26518461.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] unable to resolve Type Declaration class
Nope, this sounds like a bug... can you open a JIRA with that info
please?
Edson
2009/11/25 richarda richard.ambri...@gmail.com
Also tried under 5.1.0M1 release.. same issue :(
Am i doing something wrong by declaring the @role in the Configuration
section?
richarda wrote:
Still trying to get this to work.
I have managed to create from a default (new) guvnor setup.
Steps I do..
1. Create fresh guvnor
2. In eclipse create Message.java file in package com.sample, and create
a jar file
3. In guvnor import the model for the Message.jar file
4. In guvnor create a category
5. Create an import statement for import com.sample.Message
6. Create a simple technical rule, something like when, Message(),
then, System.out.println(.);
7. Build the pkg
8. download the pkg
use the code from previous post to load the pkg...
it works fine..
now, goto guvnor advanced view and change the Configuration from:
import com.sample.Message
to:
import com.sample.Message;
declare Message
@role( event )
end
build the pkg,
download the pkg,
run the test program...
I get:
org.drools.RuntimeDroolsException: unable to resolve Type Declaration
class 'Message'
at
org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:754)
at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:515)
at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:25)
at com.sample.DroolsTest.readKnowledgeBase(DroolsTest.java:69)
at com.sample.DroolsTest.main(DroolsTest.java:27)
richarda wrote:
So, my code is doing this:
KnowledgeBaseConfiguration conf =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
conf.setOption(EventProcessingOption.STREAM);
KnowledgeBuilder builder =
KnowledgeBuilderFactory.newKnowledgeBuilder();
try {
File f = new File(/tmp/my.pkg);
InputStream stream = new FileInputStream(f);
if (stream == null) {
jlog.fatal(Unable to find rule pkg);
} else {
jlog.info(adding pkg);
builder.add(ResourceFactory.newInputStreamResource(stream),
ResourceType.PKG);
}
} catch (Exception e) {
e.printStackTrace();
}
KnowledgeBase kbase =
KnowledgeBaseFactory.newKnowledgeBase(conf);
kbase.addKnowledgePackages(builder.getKnowledgePackages());
jlog.info(setup creating knowledge session);
ksession = kbase.newStatefulKnowledgeSession();
jlog.info( setup ksession created);
The pkg was created from Guvnor.
If in the package declaration area in Guvnor, (where you put the import
statements)
If I put
declare Signature
@role ( event )
end
then build the package, save it to disk /tmp/my.pkg
on startup I get:
[#|2009-11-24T14:50:38.944+|WARNING|sun-appserver2.1|javax.enterprise.system.stream.err|_ThreadID=12;_ThreadName=pool-1-thread-3;_RequestID=7c35064d-757e-4519-b5eb-433db89e168d;|org.drools.RuntimeDroolsException:
unable to resolve Type Declaration class 'Signature'
at
org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:754)
at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:515)
at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:25)
I need to declare 'Signature' as an 'event'
Am I doing this wrong?
If I do this all in Eclipse and load the DRL files manually it all
works.
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Re: [rules-users] GUI help
I think not, because orvosimeres is the class in the package:
public class orvosimeres {
}
Nicolas Héron wrote:
I thing it is because you use twice the same variable ovosimeres
your rule should be
Rule grafikus
dialect mvel
when
orvosimeres:Adattipus( ertek == /heart_rate )
orvosimeres2:Mertadat( mertekegyseg == /min , mozgas ==
true , vernyomas ( 140 ) , vernyomas ( 180 ) )
then
end
2009/11/25 SzA84 szepesiand...@citromail.hu
Hi!
I have some questions about the guided editor.
I try to build a rule in the guided editor. I added some conditions and
this
is the generated DRL:
Rule grafikus
dialect mvel
when
orvosimeres$Adattipus( ertek == /heart_rate )
orvosimeres$Mertadat( mertekegyseg == /min , mozgas ==
true ,
vernyomas ( 140 ) , vernyomas ( 180 ) )
then
end
My imports in the rule.package file are the following:
package orvosi;
import orvosi.orvosimeres.Adattipus;
import orvosi.orvosimeres.Mertadat;
And I have this error message: unknown:4:2 Unexpected token 'orvosimeres'
.
So that is my first question. What can cause the problem?
And my other question is, how can I execute a rule, that was made in the
guided editor?
Thanks in advance for the reply!
--
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[rules-users] 5.10M samples
I loaded the latest (5.1M) sample for fusion into eclipse and it builds and
runs, but does anyone else get this exception from time to time?
Thanks,
Chris
=
Unexpected exception caught: [Error: cannot invoke getter: getSymbol
[declr.class: org.drools.examples.broker.model.SuddenDropEvent; act.class:
null]]
[Near : {... Unknown }]
^
[Line: 1, Column: 0]
org.drools.runtime.rule.ConsequenceException: [Error: cannot invoke getter:
getSymbol [declr.class: org.drools.examples.broker.model.SuddenDropEvent;
act.class: null]]
[Near : {... Unknown }]
^
[Line: 1, Column: 0]
at
org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleExcept
ion(DefaultConsequenceExceptionHandler.java:23)
at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:980)
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Re: [rules-users] Question on Rule Flow and Web Console
Thnx for ur advice Kris Yes I think I will use either an XOR or a Rule List But I have a question about this because i was trying them yesterday: 1- Do I have to use either the rule or XOR or I have to use then both together? 2- How I can pass a parameter to a rule or an XOR ? 3- can u give me an example on an XOR or Rule? Thnx again for the help Kris -- View this message in context: http://old.nabble.com/Question-on-Rule-Flow-and-Web-Console-tp26508838p26525235.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
Re: [rules-users] FW: Rule runs twice without explicit call to update($fact).
Just the place for a Snark! I have said it twice:
That alone should encourage the crew.
Just the place for a Snark! I have said it thrice:
What i tell you three times is true.
[...]
He had forty-two boxes, all carefully packed,
With his name painted clearly on each:
But, since he omitted to mention the fact, (!)
They were all left behind on the beach.
I'm not sure whether Lewis Carroll had Drools in mind when he wrote these lines,
but the allusions are there. ;-)
That said, I'll now turn to your code which indeed achieves to
tell it thrice: once by calling the setter in a modify, twice by
calling update,
and the third time by using the PropertyChangeSupport. Small wonder that
the engine is a little confused. Simply use just one of the three, and all will
be fine.
You should certainly do it once, or else the fact will be left changed but
forgotten on the beach...
-W
2009/11/25 Jason Smith jsm...@infotrustgroup.com:
I never got an answer, any answer to this question. I really need to know
if PropertyChangeSupport actually works. Is anyone out there successfully
using it?
In one case (using modify()) I get a NPE. In all cases, the rules run
twice unless I explicitly call update(). Is anyone *not* seeing this
behaviour? Is anyone successfully using the PropertyChangeSupport mechanism
without explicit calls to update()???
Jason Smith
From: Jason Smith
Sent: Monday, November 23, 2009 12:36 PM
To: rules-users@lists.jboss.org
Subject: Rule runs twice without explicit call to update($fact).
My colleague has confirmed that this behavior has been around since Drools
4, and it continues to be a problem for Drools 5.0.1 and 5.1.0.M1, assuming
it's a problem and not working as intended.
$fact.setPath(...) implements the correct PropertyChangeSupport mechanism
for Drools. At least Drools is using it and responding mostly as expected.
This runs once:
rule
Constrain to owner or published to public
when
$fact : ListFact(
$path : path
not matches .*owner.*,
noopResponse ==
true
)
$model : Model()
then
modify($fact)
{
setPath($fact.getPath() +
[owner])
}
update($fact);
end
This runs twice:
rule
Constrain to owner or published to public
when
$fact : ListFact(
$path : path
not matches .*owner.*,
noopResponse ==
true
)
$model : Model()
then
modify($fact)
{
setPath($fact.getPath() + [owner])
}
end
If I don't use modify(...) and simply change the $fact bean path property,
the same thing occurs. If I explicitly call update($fact), the rule runs
once. If I don't it runs twice.
I get /path[owner][owner] when I actually wanted /path[owner], because
it ran twice, not once.
Why doe update(...) work differently from the PropertyChangeSupport
mechanism??? Shouldn't I be able to depend on Drools to run this rule only
one time?
I am, admittedly, a bit of a noob at this, but I ran this by my local Drools
resident expert, and he doesn't know the answer either.
Thanks so much!
Jason Smith
Software Engineer
InfoTrust Group, Inc.
500 Discovery Parkway, Suite 200
Superior, CO 80027
Office 303-627-6571
Fax 303-666-6711
Email jsm...@infotrustgroup.com
WEB www.infotrustgroup.com
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