Problems with ruleflow
by Femke De Backere
Hi,
I have a problem with an easy Rule flow project (source code included
in this mail). The only thing that should happen is the execution of a
rule flowgroup, but my application ends before executing the group...
Does anybody see the problems? I tried every possible adaptation and
based this problem on a similar, working feverapplication... But is
still doesn't work and I really can't find the problem.
Thx,
Femke
17 years
Problems setting MySQL for the human task process server....
by Cristiano Gavião
Hi,
I was trying to change the persistence settings for human task process
server for using MySQL instead of H2DB.
I was following the Drools Flows Documentation on chapter 5.1.3.:
Configuring Persistence.(https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBui...
#d0e1157)
I read on docs that I should override the persistence.xml of the
drools-process-enterprise.jar, create the drools.session.conf with
some contents (i don`t undestand` what it is...) and put them on my
project META-INF directory... ok?
I created the files as stated on docs but it didn't work... My
example runned ok, but using the H2DB and not my MYSQL.
// Use persistence.xml configuration
emf =
Persistence.createEntityManagerFactory("org.drools.persistence.jpa");
taskService = new TaskService(emf);
taskSession = taskService.createSession();
server = new MinaTaskServer(taskService);
Thread thread = new Thread(server);
thread.start();
Thread.sleep(500);
System.out.println("Server started ...");
<properties>
<property name="hibernate.dialect"
value="org.hibernate.dialect.MySQL5Dialect" />
<property name="hibernate.connection.driver_class"
value="com.mysql.jdbc.Driver" />
<property name="hibernate.connection.url" value="jdbc:mysql://
localhost/drools" />
<property name="hibernate.connection.username" value="root" />
<property name="hibernate.connection.password" value="" />
<property name="hibernate.connection.autocommit" value="false" />
<property name="hibernate.max_fetch_depth" value="3" />
<property name="hibernate.hbm2ddl.auto" value="create-drop" />
<property name="hibernate.show_sql" value="true" />
</properties>
After some investigation I could see that the example recommended by
Mark Proctor (TaskLifeCycleTest.java, and others that use
MinaTaskServer) use <persistence-unit name = "org.drools.task"> that
is setting on drools-process-task.jar and not the
"org.drools.persistence.jpa" on drools-process-enterprise.jar as
stated on documentation...
First question, which one should I use for use the Drools Flows Server
and Client?
emf =
Persistence.createEntityManagerFactory( "org.drools.task" );
emf =
Persistence.createEntityManagerFactory("org.drools.persistence.jpa");
I test the first option. I changed the persistence.xml file and use
the code below:
// Use persistence.xml configuration
emf = Persistence.createEntityManagerFactory("org.drools.task");
taskService = new TaskService(emf);
taskSession = taskService.createSession();
server = new MinaTaskServer(taskService);
Thread thread = new Thread(server);
thread.start();
Thread.sleep(500);
System.out.println("Server started ...");
Hummm.... It runs and connect well to my MySQL. but now it brings me a
error...
java.lang.IllegalArgumentException: Named query not found:
UnescalatedDeadlines
at
org
.hibernate
.ejb
.AbstractEntityManagerImpl
.createNamedQuery(AbstractEntityManagerImpl.java:108)
at org.drools.task.service.TaskService.<init>(TaskService.java:84)
at org.drools.task.service.TaskService.<init>(TaskService.java:68)
It sounds like it was not possible to find orm.xml that is on META-INF
of drools-process-task.jar.
But when I copy the orm.xml file to my project META-INF it works ok....
Could someone give some ideas how can I solve this problem..
Thanks a lot
Cristiano
17 years, 1 month
Customize the UI
by Rads2029
Hi,
Can anyone give me an example of what exactly needs to be done if I need to
use my own custom UI for rule creation etc. ( In this case my UI is Flex)
As per the rules documentation , we need to to use the ServiceImplementation
class which implements the RepositoryService. ( both of these are in the
package structure org.drools.guvnor.server)
However I could not find any jar where these classes are readily available.
:-((
It would be great if i can get pointers to the jar location and also a small
end to end example of how to plug in custom UI to call the drools guvnor (
brms) service.
Thanks,
Radha
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17 years, 1 month
Validation in Guvnor fails due to unrecognized method of implemented interface
by Brody bach
Hi,
I have a class which implementes several interfaces
class MyClass implements interA, interB, interC {
private String nameA;
private String nameB;
private String ownString;
public String getNameA(){ ---impl of method from interface interA
return nameA;
}
public String getNameB(){ ---- impl method from interface interB
return nameB;
}
public String getOwnString{ ---- own method
return ownString;
}
}
Another class, MyBiggerClass has MyClass as its attribute:
class MyBiggerClass {
private MyClass myClass;
public MyClass getMyClass(){
return myClass;
}
}
In a rule, I use MyBiggerClass as follows:
$mybig : MyBiggerClass()
eval($mybig.getMyClass().getNameB().equals("HelloWorld"))
The evaluation fails, and it said
unable to resolve method using strict-mode: interA.getNameB()
As you can see, the validator checks as if the getNameB was a method of
interA (the first interface).
I'm wondering whether this is a bug, or do I have to somehow change the
structure of my class.
But the question is, why does it check the interfaces not the class itself?
Thanks for advices
Regard
bb
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17 years, 1 month
Drools 5 - how create Logger for Template File based rules?
by chris＠twc
I'm trying to figure out how I can create a Logger to log rule activations
for my Template File code. I followed the examples to successfully create a
Logger for DRL and Decision Table examples. Apparently, to create a Logger,
the KnowledgeRuntimeLoggerFactory methods take a
KnowledgeRuntimeEventManager type, which StatefulKnowledgeSession
implements. But, for the Template File examples, the StatefulSession from
the "unstable" drools-core *does not* implement this interface. SEE the code
examples below - how do I create a Logger for my Template File code?
//#### DRL FILE & EXCEL FILE EXAMPLE FOR CREATING A SESSION AND FIRING THE
RULES:
//#### CREATING A RULES LOGGER WORKS
// populate working memory
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(...[DRL or DTABLE resources]...);
KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase();
knowledgeBase.addKnowledgePackages(kbuilder.getKnowledgePackages());
// create session
StatefulKnowledgeSession rulesSession =
knowledgeBase.newStatefulKnowledgeSession();
KnowledgeRuntimeLogger rulesLogger =
KnowledgeRuntimeLoggerFactory.newConsoleLogger(rulesSession);
//<<CREATE LOGGER!
FactHandle factHandle = rulesSession.insert(myFact);
// fire the rules
rulesSession.fireAllRules();
//#### TEMPLATE FILE EXAMPLE FOR CREATING A SESSION AND FIRING THE RULES:
//#### CREATING A RULES LOGGER DOES NOT COMPILE!
// populate working memory
ExternalSpreadsheetCompiler converter = new ExternalSpreadsheetCompiler();
InputStream spreadsheetStream = ...
InputStream templateFileStream = ...
String drl = converter.compile(spreadsheetStream, templateFileStream, 3, 3);
PackageBuilder builder = new PackageBuilder();
builder.addPackageFromDrl(new StringReader(drl));
RuleBase templateRuleBase = RuleBaseFactory.newRuleBase();
templateRuleBase.addPackage(builder.getPackage());
// create session
StatefulSession rulesSession = templateRuleBase.newStatefulSession();
KnowledgeRuntimeLogger rulesLogger =
KnowledgeRuntimeLoggerFactory.newConsoleLogger(rulesSession);//<<DOESN'T
COMPILE!
FactHandle factHandle = rulesSession.insert(myFact);
// fire the rules
rulesSession.fireAllRules();
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17 years, 1 month
[drools-solver] help for defining my drools model / moves
by Laurent Michenaud
Hi,
Here is my test :
I have an appointment to schedule on a customer availability.
I have a list of customer availabilities.
A customer availability is a period.
An appointment needs an exact number of persons.
A resource is composed of persons ( between 1 and n ) and has availabilities too.
The problem is to schedule the appointment : it has to choose the
right resource availabilities that matches one of the customer availabilities and
the total number of persons inside chosen resources must match exactly the
needed number of persons of the appointment.
My moves are for the moment :
- Change the customer availability.
- Add a resource to the list of chosen resources.
My init is :
- One of the customer availability is taken
- 0 resource taken.
First, i don't know if my model and my init are ok.
Secondly, the solver does the following :
- At the beginning, the score is bad because there is no resource.
So, it begins adding resource and the score is getting better
but when it changes the availability, the score gets very bad either because
the chosen resources don't match the new availability or it has no resource
inside. The solver doesnot seem to interest in the new chosen availibity with no
resource, but i wish it does.
Thanks for your remarks/help
Best regards
17 years, 1 month
stream mode and DroolsStreamUtils
by Jaroslaw Kijanowski
Hi,
I'm using sliding windows (hence stream mode).
Here's my rule:
declare Sensor
@role (event)
end
rule 'r'
when
Number( dv:doubleValue > 1 ) from accumulate(
Sensor( $v : value ) over window:length( 2 ),
average( $v ) )
then
System.out.println(dv);
end
Here's my class:
++++++++++++++++++++++++++++++++++++++++++++++
public class CEPTest {
public static void main(String[] args) throws Exception {
KnowledgeBuilder kbuilder =
KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newClassPathResource("cep.drl"),
ResourceType.DRL);
if (kbuilder.getErrors().size() > 0) {
throw new IllegalArgumentException("Could not parse knowledge.");
}
KnowledgeBaseConfiguration kbaseConfig =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
kbaseConfig.setOption(EventProcessingOption.STREAM);
KnowledgeBase kbase =
KnowledgeBaseFactory.newKnowledgeBase(kbaseConfig);
kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
KnowledgeBase kbase2 = (KnowledgeBase)
DroolsStreamUtils.streamIn(DroolsStreamUtils.streamOut(kbase), null);
final StatefulKnowledgeSession ksession =
kbase2.newStatefulKnowledgeSession();
System.out.println("T1");
ksession.insert(new Sensor(1.0));
ksession.fireAllRules();
System.out.println("T2");
ksession.insert(new Sensor(2.0));
ksession.fireAllRules();
System.out.println("T3");
ksession.insert(new Sensor(3.0));
ksession.fireAllRules();
ksession.dispose();
}
}
++++++++++++++++++++++++++++++++++++++++++++++
The output is (as expected):
+++++++++++++++
T1
T2
1.5
T3
2.5
+++++++++++++++
I'm wondering why I have to use DroolsStreamUtils to get a knowledge
base? When I use kbase (which didn't went through DroolsStreamUtils)
instead of kbase2 to create a new session, the output will be:
+++++++++++++++
T1
T2
2.0
T3
3.0
+++++++++++++++
Thanks,
Jarek
17 years, 1 month
Re: [rules-users] How to retrieve the Rule names in the drools rule file
by Amila Silva
Hi Laun,
Yes now it works fine thanks.
earlier case it was like
rule "Test Exists" enabled false
@Purpose (" WORD ")
when
after removing "enabled false" tag it works fine.
Amila Silva
--- @ WiseStamp Signature <http://www.wisestamp.com/email-install>. Get it
now <http://www.wisestamp.com/email-install>
On Tue, Jun 30, 2009 at 5:02 PM, Wolfgang Laun <wolfgang.laun(a)gmail.com>wrote:
> Notice that the metadata annotations must precede 'when', not 'then'.
>
> rule x
> @Purpose( "purpose of x" )
> when
> ...
> then
> ...
> end
>
> You may use more than one such metadata, e.g.,
>
> rule x
> @Purpose( "purpose of x" )
> @Rulename( "this rule is called 'x'" )
> when
> ...
>
> -W
>
>
>
> -W
>
>
> On 6/30/09, Amila Silva <amilac(a)hsenidmobile.com> wrote:
>>
>> hi Laun,
>> I tries with your solutions but i couldn't find the way to configure
>> the meta - data part in rule file to read.
>> I came across with following issues when trying to read it from a given
>> code.
>>
>> [12,2]: [ERR 102] Line 12:2 mismatched input 'AT' expecting 'then' in
>> rule "create new Instance"
>> Exception in thread "main" java.lang.IllegalArgumentException: Could
>> not parse knowledge.
>>
>> i think this might be a issue with a @ sign in the rule file but i think
>> i this kinda of annotations will help to specify the
>> main rule name. Or is there any way to identify or filter out the main
>> rule name from file.
>>
>> BTW your this solution help me a lot.
>> thanks
>>
>>
>>
>>
>>
>>
>> On Tue, Jun 30, 2009 at 2:44 PM, Wolfgang Laun <wolfgang.laun(a)gmail.com>wrote:
>>
>>> You might use the API to retrieve all rules in your KnowledgeBase
>>>
>>> KnowledgeBase kBase = ...;
>>>
>>> for( KnowledgePackage kp: kBase.getKnowledgePackages() ){
>>> for( Rule r: kp.getRules() ){
>>> String name = r.getName();
>>> String purpose = r.getMetaAttribute( "Purpose" ); // or
>>> similar - see below
>>> System.out.println( "Rule " + name + ", purpose: " + purpose
>>> );
>>> }
>>> }
>>>
>>> Rule names may not provide sufficient information. You could add
>>> arbitrary metadata to your rules, e.g.,
>>>
>>> rule "pqx"
>>> @Purpose( "locates very interesting facts" )
>>> when
>>> ...
>>> end
>>>
>>> -W
>>>
>>>
>>>
>>> 2009/6/30 Amila Silva <amilac(a)hsenidmobile.com>
>>>
>>>>
>>>> hi everyone,
>>>> I have requirement like to retrieve the RULE names in a given rule
>>>> files. and also is there a way to map a rule names from a multiple rule
>>>> files.
>>>> i want to load the or show the available rules and system user to
>>>> select the required rule for his program.
>>>> let me know the possible way of doing this.
>>>>
>>>>
>>>> --
>>>> Thanks,
>>>> Regrads,
>>>>
>>>> Amila Silva,
>>>> Associate Software Engineer
>>>>
>>>> hSenid Mobile Solutions
>>>>
>>>> Phone :
>>>> +94-77-9983894
>>>> Fax :
>>>> +94-11-2673 845
>>>>
>>>> Web:
>>>> http://www.hSenid.com <http://www.hsenid.com/>
>>>>
>>>> Make it Happen
>>>>
>>>>
>>>> http://www.hSenidMobile.com <http://www.hsenidmobile.com/>
>>>>
>>>> Enabling the Mobile World
>>>>
>>>>
>>>> Disclaimer: This email and any files transmitted with it are
>>>> confidential and intended solely for the use of the individual or entity to
>>>> which they are addressed. The content and opinions contained in this email
>>>> are not necessarily those of hSenid Software International. If you have
>>>> received this email in error please contact the sender.
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> rules-users mailing list
>>>> rules-users(a)lists.jboss.org
>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>> --
>>
>>
>
--
Thanks,
Regrads,
Amila Silva,
Associate Software Engineer
hSenid Mobile Solutions
Phone :
+94-77-9983894
Fax :
+94-11-2673 845
Web:
http://www.hSenid.com
Make it Happen
http://www.hSenidMobile.com
Enabling the Mobile World
Disclaimer: This email and any files transmitted with it are confidential
and intended solely for the use of the individual or entity to which they
are addressed. The content and opinions contained in this email are not
necessarily those of hSenid Software International. If you have received
this email in error please contact the sender.
17 years, 1 month
RuleBase.newStatefulSession() and EventProcessingOption
by Julien Nicoulaud
Hi, I am trying to upgrade a system from Drools 4.0.7 to Drools 5.0.1 to
use Drools Fusion temporal operators.
With used to start our rule engine this way:
RuleBase ruleBase = RuleBaseFactory.newRuleBase(new
RuleBaseConfiguration(ourClassloader));
WorkingMemory workingMemory = ruleBase.newStatefulSession();
Now this seems deprecated reading the Drools fusion documentation...
Should I give up RuleBase for KnowledgeBase to be able to start the rule
engine in "Stream" event processing mode ?
Thanks for your help !
Julien Nicoulaud
OW2 Consortium
17 years, 1 month
