[rules-users] Drools server and knowledge agent functionality

[Esteban Aliverti]

Yes, your approach is also ok. I was about to create the servlet I have
mentioned. Now I'm wondering which one is the best approach.
About reloading rules with declared types, yes, there is a known issue. They
are added multiple times in the classloader leading to ClassCastExceptions.
We are working on a solution. It would be nice if you could file an issue in
Jboss' jira (https://jira.jboss.org/) to keep track about the progress.

Best Regards,

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

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


2011/4/17 HALL, Ross <Ross.HALL at suncorp.com.au>

>  Hi Esteban,
>
>
>
> To start up the notifier and scanner service I modified the Drools-Server
> ResourceChangeScannerBeanFactory as documented in this post:
>
>
>
>
> http://drools.46999.n3.nabble.com/drools-server-resource-change-scanner-notifier-td2649325.html
>
>
>
> I’m just wondering whether this is the right approach or if I should
> consider a Servlet as you have suggested. Did you have a particular reason
> for this approach?
>
>
>
> BTW another caveat is that Declared Facts will not rebuild correctly, they
> just seem to get lost although other rules not dependent on any declared
> facts will fire normally. Using POJO’s is fine. Using new-instance =true
> will throw an error when a merge of the rules is attempted. I think this is
> a know issue with the rule agent.
>
>
>
> Regards Ross
>
>
>
> *From:* rules-users-bounces at lists.jboss.org [mailto:
> rules-users-bounces at lists.jboss.org] *On Behalf Of *Esteban Aliverti
> *Sent:* Friday, 15 April 2011 10:40 PM
> *To:* Rules Users List
> *Subject:* Re: [rules-users] Drools server and knowledge agent
> functionality
>
>
>
> Hi.
>
> You can configure a Knowledge Agent in Drools-Server using spring. You have
> to declare it in knowledge-services.xml config file. You need to do
> something like:
>
>
>
> <drools:kagent id="kagent1" kbase="kbase1" new-instance="false">
>
>             <drools:resources>
>
>                <drools:resource  type="DRL"
> source="file:/some/path/to/apache-tomcat-7.0.6/webapps/drools-server/WEB-INF/classes/test.drl"/>
>
>             <drools:resource  type="PKG" source="
> http://somehost:8080/droolg-guvnor/.../LATEST"/>
>
>          </drools:resources>
>
> </drools:kagent>
>
>
>
> For configure the scan interval, you can use:
>
>
>
> <drools:resource-change-scanner id="s1" interval="5" />
>
>
>
> There are, though, some caveats:
>
>    - If you are deploying drools-server in tomcat, then you can't use
>    classpath resources in the kagent. I have reported this problem today.
>    - drools-server doesn't start ResourceChangeNotifierService
>    nor ResourceChangeScannerService automatically. You need to hack some way to
>    invoke ResourceFactory.getResourceChangeNotifierService().start();
>    and ResourceFactory.getResourceChangeScannerService().start();. I was
>    thinking in a Servlet that calls these methods in its init() method.
>
>  Best Regards,
>
>
>
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>
> Esteban Aliverti
> - Developer @ http://www.plugtree.com
> - Blog @ http://ilesteban.wordpress.com
>
>  2011/4/15 Manuel Ortiz <manuel.ortizramos at gmail.com>
>
> Hello everybody:
>
>
>
> I am taking a look at Drools Integration documentation to understand how
> Drools server works and how can be used, and have a doubt concerning, let's
> say... 'KnowledgeAgent capabilities'. Does Drools server support on the fly
> rule updating as when using KnowledgeAgent to create KnowledgeBase objects?
> If it does, where can be configured 'KnowledgeAgent related' properties such
> as newInstance or resource scanner interval?
>
>
>
> Thank you in advance for your time.
>
>
>
> Kind regards,
>
>
>
> Manuel Ortiz.
>
>
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