[rules-users] Starting resource change scanner and notifier in drools-server.

Wed Nov 3 17:49:36 EDT 2010

Hello,

Any tips on this?  I'm seeing this same behavior using Drools 5.1.1:

Spring Beans:

  <!-- Drools : -->

  <drools:resource-change-scanner id="scanner" interval="10" />

  <drools:kbase id="ruleKBase">

  </drools:kbase>

  <drools:kagent id="kagent1" kbase="ruleKBase">

    <drools:resources>

     <drools:resource type="CHANGE_SET" source=
"classpath:drools-changeset.xml"/>

    </drools:resources>

  </drools:kagent>

Changeset:

<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
http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-api/src/main/resources/change-set-1.0.0.xsd
' >

    <add>

      <resource source="
http://10.1.109.54:8080/drools-5.1.1-guvnor/org.drools.guvnor.Guvnor/package/com.cjs.jworks.rules.cases/LATEST
"

           type='PKG' basicAuthentication="enabled" username="admin"
password="admin" />

    </add>

</change-set>

At startup I see that the KnowledgeAgent registers a listener but never
detects changes:

[2010:11:307 15:11:506:info] ResourceChangeScanner reconfigured with
interval=60

[2010:11:307 15:11:506:info] ResourceChangeScanner created with default
interval=60

[2010:11:307 15:11:506:info] ResourceChangeScanner reconfigured with
interval=10

[2010:11:307 15:11:528:info] ResourceChangeNotification created

[2010:11:307 15:11:528:debug] ResourceChangeNotification monitor added
monitor=org.drools.io.impl.ResourceChangeScannerImpl at 616181be

[2010:11:307 15:11:529:debug] KnowledgeAgent building resource map

[2010:11:307 15:11:529:info] KnowledegAgent has started listening for
ChangeSet notifications

[2010:11:307 15:11:529:info] KnowledgeAgent created, with configuration:

monitorChangeSetEvents=true scanResources=true scanDirectories=true
newInstance=true

[2010:11:307 15:11:530:info] KnowledgeAgent applying ChangeSet

[2010:11:307 15:11:531:debug] KnowledgeAgent processing sub
ChangeSet=[ClassPathResource path='drools-changeset.xml']

[2010:11:307 15:11:919:debug] KnowledgeAgent notifier subscribing to
resource=[UrlResource path='
http://10.1.109.54:8080/drools-5.1.1-guvnor/org.drools.guvnor.Guvnor/package/com.cjs.jworks.rules.cases/LATEST
']

[2010:11:307 15:11:920:debug] ResourceChangeNotification subscribing
listener=org.drools.agent.impl.KnowledgeAgentImpl at d2a7c1e to
resource=[UrlResource path='
http://10.1.109.54:8080/drools-5.1.1-guvnor/org.drools.guvnor.Guvnor/package/com.cjs.jworks.rules.cases/LATEST
']

[2010:11:307 15:11:920:debug] ResourceChangeScanner subcribing
notifier=org.drools.io.impl.ResourceChangeNotifierImpl at 603a9c52 to
resource=[UrlResource path='
http://10.1.109.54:8080/drools-5.1.1-guvnor/org.drools.guvnor.Guvnor/package/com.cjs.jworks.rules.cases/LATEST
']

[2010:11:307 15:11:920:debug] KnowledgeAgent rebuilding KnowledgeBase using
ChangeSet

Thanks!

Jason

2010/9/23 Clandes Tino <clandestino_bgd at yahoo.co.uk>

> Hi,
> I've also faced the same problem.
> Hope somebody could give a hint.
>
> thanks & best,
> milan
>
> --- On *Mon, 20/9/10, Graham Thomson <gthomson at fizzback.com>* wrote:
>
>
> From: Graham Thomson <gthomson at fizzback.com>
> Subject: [rules-users] Starting resource change scanner and notifier in
> drools-server.
> To: rules-users at lists.jboss.org
> Date: Monday, 20 September, 2010, 15:24
>
>
>
> Hi,
>
> I would like to ask for help with setting up drools-server with Guvnor. I
> am using version 5.1.1 of both.
>
> I am trying to set up an instance of drools-server in Tomcat that
> periodically loads new updates of packages published in Guvnor (both
> drools-server and Guvnor run in the same instance of Tomcat).
>
> My change set definition is as follows:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <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
>
> http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-api/src/main/resources/change-set-1.0.0.xsd'
> >
>   <add>
>     <resource source='
> http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/<one
> of my packages>/LATEST'
>       type='PKG' basicAuthentication="enabled" username="<username>"
> password="" />
>     <resource source="
> http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/<another
> of my packages>/LATEST"
>       type="PKG" basicAuthentication="enabled" username="<username>"
> password="" />
>   </add>
> </change-set>
>
> My knowledge-services.xml configuration is as follows (based on the unit
> test examples highlighted in
> http://article.gmane.org/gmane.comp.java.drools.user/20992/match=drools+spring
> ):
>
> <?xml version="1.0" encoding="UTF-8"?>
> <beans xmlns="http://www.springframework.org/schema/beans"
>        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>        xmlns:drools="http://drools.org/schema/drools-spring"
>        xsi:schemaLocation="http://www.springframework.org/schema/beans
> http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
>                            http://drools.org/schema/drools-spring
> http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-container/drools-spring/src/main/resources/org/drools/container/spring/drools-spring-1.0.0.xsd
> ">
>
>   <drools:resource-change-scanner id="s1" interval="5" />
>
>   <drools:execution-node id="node1" />
>
>   <drools:ksession id="ksession1" type="stateless" kbase="kbase1"
> node="node1"/>
>
>   <drools:kbase id="kbase1" node="node1" />
>
>   <drools:kagent id="kagent1" kbase="kbase1">
>     <drools:resources>
>       <drools:resource type="CHANGE_SET" source="classpath:changeset.xml"
> />
>     </drools:resources>
>   </drools:kagent>
>
> </beans>
>
> On loading drools-server, the resources listed in the change set are loaded
> and available.
>
> The problem is that when a new package built and published in Guvnor,
> drools-server does not detect this and update itself. The effect is the same
> as if a KnowledgeAgent were used locally and
>
>   ResourceFactory.getResourceChangeNotifierService().start();
>   ResourceFactory.getResourceChangeScannerService().start();
>
> were not called. This leads me to the assumption that drools-server does
> not start these services by default.
>
> My question is then can/how do I configure drools-server to start these
> services such that it will update new changes from Guvnor automatically?
>
>
> Thanks a lot for any help you can offer,
>
> Cheers,
>
> Graham.
>
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