[rules-users] spring-drools api exception: Invalid property 'knowledgeAgent'

[Esteban Aliverti]

kagent property of StatelessKnowledgeSessionImpl is only used by the kagent
itself. This property is not even exposed through StatelessKnowledgeSession
interface. So I'm not sure whether this should be configurable through
spring or not.

If you are trying to configure a Stateful session from a kbase that is
updated by a kagent, you could try this configuration:

<drools:ksession id="ksession1" type="stateful" kbase="kbase1"/>
 <drools:kbase id="kbase1"/>


<drools:kagent id="kagent1" kbase="kbase1" new-instance="false">
      <drools:resources>
        <drools:resource type="DRL" source="....." />

        <drools:resource type="DRL" source="....." />

        ...

      </drools:resources>
</drools:kagent>



Best,

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com


On Wed, Feb 23, 2011 at 5:29 PM, mmjose26 <mmjose26 at yahoo.com.mx> wrote:

>
> Hi,
> Im runnung test cases in Spring Drools 5.2M1
>
> and I have this exception:
>
> Exception in thread "main"
> org.springframework.beans.factory.BeanCreationException: Error creating
> bean
> with name 'ksession2': 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?
>
> it happens with testAgents method
>
> If you change the source code located in the drools-spring component in
> class
>
> org.drools.container.spring.namespace.KnowledgeSessionDefinitionParser.java:
>
>
>
>  // find any kagent's for the current kbase and assign
>        for ( String beanName :
> parserContext.getRegistry().getBeanDefinitionNames() ) {
>            BeanDefinition def =
> parserContext.getRegistry().getBeanDefinition( beanName );
>            if ( KnowledgeAgentBeanFactory.class.getName().equals(
> def.getBeanClassName() ) ) {
>                PropertyValue pvalue =
> def.getPropertyValues().getPropertyValue( "kbase" );
>                RuntimeBeanReference tbf = (RuntimeBeanReference)
> pvalue.getValue();
>                if ( kbase.equals( tbf.getBeanName() ) ) {
>                    factory.addPropertyValue( "knowledgeAgent",
>                                              new RuntimeBeanReference(
> beanName ) );
>                }
>            }
>        }
>
> modifying:  if ( kbase.equals( tbf.getBeanName() ) &&  "stateless".equals(
> sessionType ) )
> it works, becasue only stateless sessions have knowledgeAgent property.
>
> is It Correct?
>
>
>
> --
> View this message in context:
> http://drools-java-rules-engine.46999.n3.nabble.com/spring-drools-api-exception-Invalid-property-knowledgeAgent-tp2562735p2562735.html
> Sent from the Drools - User mailing list archive at Nabble.com.
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