How to Capture the rule which does not get executed
by Navdeep Kumar
Hi All,
I am new to Drools. I am working on a project where nature of rules are
dynamic. I want to capture that rule which does not get executed. i need to
store that rule because i have to display that rule in the UI.
Here is my rule file
rule "FrontAxle:Capacity|FrontSuspension:Capacity"
when
b:Feature(featureClass.name=="FrontSuspension")
c:Feature(featureClass.name=="FrontAxle")
//eval(b.getCapacity() >= c.getCapacity())
then
System.out.println("These are compatible");
System.out.println(b.getFeatureClass().getName());
availablity.put(b.getFeatureClass().getName()+"-"+c.getFeatureClass().getName(),"12.35");
//availablity.put(b.getName()+"-"+c.getName(),new Double(b.getCapacity()));
insert(availablity);
end
rule "FrontSuspension:Type|FrontAxle:Type"
when
b:Feature(featureClass.name=="FrontSuspension")
c:Feature(featureClass.name=="FrontAxle")
not Feature(b.attributes.Type=="I Beam" && c.attributes.Type=="Multi Link
Air")
//NOT (FrontAxle.type = "I-Beam" AND FrontSuspension.type = "Multi-link
Air") - mounting restriction
then
System.out.println("I am in 2");
end
rule "FrontAxle:FeatureCode|FrontSuspension:Type"
when
b:Feature(featureClass.name=="FrontSuspension")
Feature(featureClass.name=="FrontAxle" && code=="002ASW")and not
Feature(b.attributes.Type=="Multi Link Air" || b.attributes.Type=="Monoleaf
Spring")
//FrontAxle.featureCode = "002ASW" AND NOT (FrontSuspension.type =
"Multi-link Air" OR FrontSuspension.type = "Monoleaf Spring")
then
System.out.println("I am in 3");
end
now if these two objects named FrontAxle and FrontSuspension are compatible
then it has to meet all the 3 rules, but if any combination of these objects
does not meet one of the rule listed above then i have to store the rule for
the displaying purpose that this combination didn't meet this rule thats why
they are not compatible. any kind of help will be appreciated.
Thanks.
15 years, 11 months
re-fire all rules
by Yaniv Itzhaki
Hi there,
Is there a way to "reset" the working memory so that all the rules will
run again when fireAllRules() is called? (I am running the startProcess
method number of times with the same working memory)
I know that normally rules will only be run again when there was a change
and the fact was updated. but in my case I like to run all rules again
in some situations without having a change on the facts.
so is there a way to do this?
Thanks
Yaniv
15 years, 11 months
Question about drools server
by Xinhua Zhu
Hi
I am a new guy on drools server. I am trying to exposed drools rules in web
services.
I downloaded Drools Guvnor Standalone from website, it includes Jboss, then
I put drools server war file in deploy folder, and start the Jboss.
When I input "http://localhost:8080/drools-5.1.1-server/" in browser, it
works well. the result is "Execution server is running".
When I input "http://localhost:8080/drools-5.1.1-server/test.jsp", the
expected result should be "echo: Hello world", but the actual result is:
Sending Message: "Hello World"
Response: "org.apache.cxf.jaxrs.impl.ResponseImpl@6231ed"
What is wrong with it? How to solve it? Thanks very much!
BR
Xinhua
15 years, 11 months
ksession.dispose() and DroolsSpringJpaManager.dispose()
by drooRam
I have question on kession.dispose(), what is the best place to call this
method?
I have a code where in i call
ksession.startProcess("someprocess", mapParam);
ksession.fireAllRules();
....
finally{
ksession.dispose();
}
If i invoke the kession.dispose() like the above, I always ended up in "No
value bound to the key" - Transaction exception.
My understanding is that all the calls to drools should be enclosed in a
transactional unit. I have done that so.
My observation is that DroolsSpringJpaManager.dispose() method is being
invoked due to my call to ksession.dispose() after the transaction has begun
from my app code and right before the transaction.aftercompletioncommit()
call.
I can see a line of code in DroolsJpaManager.dispose() method,
TransactionSynchronizationManager.unbindResource(this.emf) //
entityManagerFactory reference borrowed from application code.
My question is that why the above line of code is necessary in dispose()
method since this.emf is the reference obtained from Application code jpa
manager, since this method unbinded this resource, transaction initiated
from the application code is also trying to unbind the same resource once
everything is completed results to "No value found for this key exception".
When i comment out ksession.dispose() call from my app code, it works fine.
At this point, i am not sure when to invoke ksession.dispose() call and why
the TransactionSynchronizationManager.unbindResource(this.emf) being made
in DroolsSpringJpaManager.dispose() on a reference obtained from
JpaTransactionManager ?
-drooRam
--
View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/ksession-dispose-and-...
Sent from the Drools - User mailing list archive at Nabble.com.
15 years, 11 months
DRL Functions
by Swindells, Thomas
I've just been writing what should be a really simple function in my DRL.
What I wanted to do is to take an object in, construct another object from it and then insert both into working memory.
Eg.
function void insertBoth(Object1 object1) {
insert(new Object2(object1));
insert(object 1);
}
Rule XYZ
When
Then
insertBoth(new Object1());
End
This didn't work as expected however as it couldn't find the method insert.
I then thought, ah maybe I need to use the kcontext global to access them
function void insertBoth(Object1 object1) {
kcontext.insert(new Object2(object1));
kcontext.insert(object 1);
}
Rule XYZ
When
Then
insertBoth(new Object1());
End
This doesn't work either so what I've had to do is:
function void insertBoth(KnowledgeContext kcontext, Object1 object1) {
kcontext.getKnowledgeRuntime().insert(new Object2(object1));
kcontext.getKnowledgeRuntime().insert(object 1);
}
Rule XYZ
When
Then
insertBoth(kcontext, new Object1());
End
This is suddenly a lot more complicated than it needs to be. Why can't functions have the same access to the standard operations (insert, update, retract etc) and globals as rule actions currently do?
Should I raise an issue for this or am I missing something?
Thomas
________________________________
**************************************************************************************
This message is confidential and intended only for the addressee. If you have received this message in error, please immediately notify the postmaster(a)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.
NDS Limited. Registered Office: One London Road, Staines, Middlesex, TW18 4EX, United Kingdom. A company registered in England and Wales. Registered no. 3080780. VAT no. GB 603 8808 40-00
**************************************************************************************
15 years, 11 months
Variable Notation in rule Condition
by sumatheja
Hi All,
I have this doubt regarding the notation used inside the rule's
condition. I have a fact HOST having the variables* HostName* and *
CPUSockets*. I have the following rule
rule "Test"
when
HOST(HostName!=null, CPUSockets>3)
then
# do something
Is throws an error saying cannot extract field *HostName*. It works fine
when i use *hostName*. Can anyone explain me the concept behind this.
Thanks in advance :)
--
cheers
Sumatheja Dasararaju
15 years, 11 months
Drools-Spring Config for Knowledge Agent
by KiranP
Hello Everybody,
I've used Drools5.1.0 and I have following Config In Spring :
<drools:resource id="profileChangeProcess" type="DRF"
source="classpath:/process/profilechangeprocess.rf"></drools:resource>
<drools:resource id="documentsRule" type="DRL"
source="classpath:/rules/documentsrule.drl" />
<drools:resource id="ChangeSet" type="CHANGE_SET"
source="classpath:/ChangeSet.xml"></drools:resource>
<drools:resource-change-scanner id="scanner" interval="10" />
<drools:kagent id="agent" kbase="knowledgeBase" new-instance="true">
<drools:resources>
<drools:resource ref="profileChangeProcess"></drools:resource>
<drools:resource ref="documentsRule"></drools:resource>
<drools:resource ref="ChangeSet"></drools:resource>
</drools:resources>
</drools:kagent>
<drools:kbase id="knowledgeBase"></drools:kbase>
now when i run the code i get following exception :
org.springframework.beans.factory.BeanCreationException: Error creating
bean with name 'kSession': Error setting property values; nested exception
is org.springframework.beans.NotWritablePropertyException: Invalid property
'knowledgeAgent' of bean class
[org.drools.container.spring.beans.StatefulKnowledgeSessionBeanFactory]:
Bean property 'knowledgeAgent' is not writable or has an invalid setter
method. Does the parameter type of the setter match the return type of the
getter?
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1341)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1067)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:511)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450)
at
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:290)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:189)
at
org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:820)
at
org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:762)
at
org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:680)
at
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:475)
... 30 more
Caused by: org.springframework.beans.NotWritablePropertyException: Invalid
property 'knowledgeAgent' of bean class
[org.drools.container.spring.beans.StatefulKnowledgeSessionBeanFactory]:
Bean property 'knowledgeAgent' is not writable or has an invalid setter
method. Does the parameter type of the setter match the return type of the
getter?
at
org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:1012)
at
org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:857)
at
org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:76)
at
org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:58)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1338)
... 41 more
any help or pointers to examples may help.............
-----
Keep Working >>
KiranP
--
View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Drools-Spring-Config-...
Sent from the Drools - User mailing list archive at Nabble.com.
15 years, 11 months
Resuming a simple process involving human task
by Touma
Hi all,
For the past few weeks I've been trying to get a simple drools flow example
involving human tasks up and running. I've done quite a bit to the point
that my session, process, task and workitems are being persisted in the
database. Here is what my flow looks like:
Start -> Ruleflow -> Decision node -> Human Task -> Printing Node -> End
The work item handler for the Human task simply performs the task of
persisting the Task instance. After reaching the Human Task, the flow stops
and the state is persisted. But how would I go about restarting/resuming the
flow so that the 'Printing node' is reached? I've tried using the
loadStatefulKnowledgeSession(sessionId) to load the session but querying the
list of all the processes for the given session returns an empty list. Ditto
with the list of all the process events. I have all the ID's with me
(workitem, process, task, session) but am pretty confused as to how these
can be put to use to resume my suspended workflow.
Any pointers would be much appreciated. TIA.
Peace,
/T\
--
View this message in context: http://n3.nabble.com/Resuming-a-simple-process-involving-human-task-tp716...
Sent from the Drools - User mailing list archive at Nabble.com.
15 years, 11 months
