6:07 p.m.
Yes and no . Guvnor uses a JCR repository (the default is http://jackrabbit.apache.org/)
which can not be accessed using hibernate directly. We ran into this issue, and the only
way to use guvnor as of 6 months ago was to have a user go into guvnor and create a DRL
file by clicking a few buttons. Not a big deal, but it isn't automated. You can then
use that DRL as a resource in your application. I know there was some working being done
to be able to pull out DRLs from Guvnor using xml calls, but don't know if that was
ever completed.
Michael Rhoden
----- Original Message -----
From: "bbarani" <bbarani(a)gmail.com>
To: rules-users(a)lists.jboss.org
Sent: Wednesday, May 19, 2010 5:12:57 PM
Subject: [rules-users] Drools with Guvnor
Hi,
I am very new to Drools and very very new to Guvnor.
I am in the process of creating a rule engine which will fetch the data from
a source (I am using Hibernate framework to fetch the data) and evaluate the
data using Drools rule engine. The rules supplied to the Drools rule engine
are stored in a Rules table in a database.
Now my question is that can I use Guvnor to store the rules (instead of me
creating a rule data model) and use Guvnor to supply rules to my Drools
engine?
I am trying to find out the best possible way to create / manage a rule
database (which stores all the rules).
Thanks,
BB
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1:43 a.m.
New subject: Drools with Guvnor
With the new KnowledgeAgent API, you can not only connect to Guvnor
server remotely to store and retrieve rules, but also to add or update
rules. It also has basic authentication supported. Take a look at the
unit test:
http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-compiler...
Below is a very simple test case that connects to Guvnor to retrieve a
rule package, build a KnowledgeSession, then fire rules:
public void testBasicAuthentication() throws Exception {
String xml = "";
xml += "<change-set
xmlns='http://drools.org/drools-5.0/change-set'";
xml += "
xmlns:xs='http://www.w3.org/2001/XMLSchema-instance'";
xml += "
xs:schemaLocation='http://drools.org/drools-5.0/change-set
drools-change-set-5.0.xsd' >";
xml += " <add> ";
xml += " <resource
source='http://localhost:8081/drools-guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST'
type='PKG' basicAuthentication='enabled' username='admin'
password='admin'/>";
xml += " </add> ";
xml += "</change-set>";
File fxml = fileManager.newFile("changeset.xml");
Writer output = new BufferedWriter(new FileWriter(fxml));
output.write(xml);
output.close();
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
ResourceChangeScannerConfiguration sconf = ResourceFactory
.getResourceChangeScannerService()
.newResourceChangeScannerConfiguration();
sconf.setProperty("drools.resource.scanner.interval", "2");
ResourceFactory.getResourceChangeScannerService().configure(sconf);
KnowledgeAgentConfiguration aconf = KnowledgeAgentFactory
.newKnowledgeAgentConfiguration();
aconf.setProperty("drools.agent.scanDirectories", "true");
aconf.setProperty("drools.agent.scanResources", "true");
aconf.setProperty("drools.agent.newInstance", "true");
KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent(
"test agent", kbase, aconf);
kagent.applyChangeSet(ResourceFactory.newUrlResource(fxml.toURI()
.toURL()));
StatefulKnowledgeSession ksession = kagent.getKnowledgeBase()
.newStatefulKnowledgeSession();
List<String> list = new ArrayList<String>();
ksession.setGlobal("list", list);
ksession.fireAllRules();
ksession.dispose();
assertEquals(2, list.size());
assertTrue(list.contains("rule1"));
assertTrue(list.contains("rule2"));
}
Hope this helps,
Jervis
Michael Rhoden wrote:
Yes and no. Guvnor uses a JCR repository (the default is
http://jackrabbit.apache.org/) which can not be accessed using
hibernate directly. We ran into this issue, and the only way to use
guvnor as of 6 months ago was to have a user go into guvnor and create
a DRL file by clicking a few buttons. Not a big deal, but it isn't
automated. You can then use that DRL as a resource in your
application. I know there was some working being done to be able to
pull out DRLs from Guvnor using xml calls, but don't know if that was
ever completed.
Michael Rhoden
----- Original Message -----
From: "bbarani" <bbarani(a)gmail.com>
To: rules-users(a)lists.jboss.org
Sent: Wednesday, May 19, 2010 5:12:57 PM
Subject: [rules-users] Drools with Guvnor
Hi,
I am very new to Drools and very very new to Guvnor.
I am in the process of creating a rule engine which will fetch the
data from
a source (I am using Hibernate framework to fetch the data) and
evaluate the
data using Drools rule engine. The rules supplied to the Drools rule
engine
are stored in a Rules table in a database.
Now my question is that can I use Guvnor to store the rules (instead of me
creating a rule data model) and use Guvnor to supply rules to my Drools
engine?
I am trying to find out the best possible way to create / manage a rule
database (which stores all the rules).
Thanks,
BB
--
View this message in context:
http://drools-java-rules-engine.46999.n3.nabble.com/Drools-with-Guvnor-tp...
Sent from the Drools - User mailing list archive at Nabble.com.
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
------------------------------------------------------------------------
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1:52 p.m.
New subject: Drools with Guvnor
Well, actually KnowledgeAgent can't modify the rules. It can modify its
internal kbase using the change-sets shown by jervis, but the rule sources
are never modified by the agent.
Basically you can start an agent with some initial change-set and all the
rules present in the change-set resources are added to the agent's kbase.
Once the agent is running you can add more resources using similar
change-sets. You can even modify (remove, update) the rules inside the
agent's kbase using change-sets too. Using ResourceScanner and Notifier, the
agent is able to automatically detect changes on monitored resources and
reflect the changes in its internal kbase. But as I said, the resources are
never modified by the agent.
Hope I was clear.
Best,
On Thu, May 20, 2010 at 3:43 AM, Jervisliu <jliu(a)redhat.com> wrote:
With the new KnowledgeAgent API, you can not only connect to Guvnor
server remotely to store and retrieve rules, but also to add or update
rules. It also has basic authentication supported. Take a look at the
unit test:
http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-compiler...
Below is a very simple test case that connects to Guvnor to retrieve a
rule package, build a KnowledgeSession, then fire rules:
public void testBasicAuthentication() throws Exception {
String xml = "";
xml += "<change-set
xmlns='http://drools.org/drools-5.0/change-set'";
xml += "
xmlns:xs='http://www.w3.org/2001/XMLSchema-instance'";
xml += "
xs:schemaLocation='http://drools.org/drools-5.0/change-set
drools-change-set-5.0.xsd' >";
xml += " <add> ";
xml += " <resource
source='
http://localhost:8081/drools-guvnor/org.drools.guvnor.Guvnor/package/mort...
'
type='PKG' basicAuthentication='enabled' username='admin'
password='admin'/>";
xml += " </add> ";
xml += "</change-set>";
File fxml = fileManager.newFile("changeset.xml");
Writer output = new BufferedWriter(new FileWriter(fxml));
output.write(xml);
output.close();
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
ResourceChangeScannerConfiguration sconf = ResourceFactory
.getResourceChangeScannerService()
.newResourceChangeScannerConfiguration();
sconf.setProperty("drools.resource.scanner.interval", "2");
ResourceFactory.getResourceChangeScannerService().configure(sconf);
KnowledgeAgentConfiguration aconf = KnowledgeAgentFactory
.newKnowledgeAgentConfiguration();
aconf.setProperty("drools.agent.scanDirectories", "true");
aconf.setProperty("drools.agent.scanResources", "true");
aconf.setProperty("drools.agent.newInstance", "true");
KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent(
"test agent", kbase, aconf);
kagent.applyChangeSet(ResourceFactory.newUrlResource(fxml.toURI()
.toURL()));
StatefulKnowledgeSession ksession = kagent.getKnowledgeBase()
.newStatefulKnowledgeSession();
List<String> list = new ArrayList<String>();
ksession.setGlobal("list", list);
ksession.fireAllRules();
ksession.dispose();
assertEquals(2, list.size());
assertTrue(list.contains("rule1"));
assertTrue(list.contains("rule2"));
}
Hope this helps,
Jervis
Michael Rhoden wrote:
> Yes and no. Guvnor uses a JCR repository (the default is
> http://jackrabbit.apache.org/) which can not be accessed using
> hibernate directly. We ran into this issue, and the only way to use
> guvnor as of 6 months ago was to have a user go into guvnor and create
> a DRL file by clicking a few buttons. Not a big deal, but it isn't
> automated. You can then use that DRL as a resource in your
> application. I know there was some working being done to be able to
> pull out DRLs from Guvnor using xml calls, but don't know if that was
> ever completed.
>
> Michael Rhoden
>
>
> ----- Original Message -----
> From: "bbarani" <bbarani(a)gmail.com>
> To: rules-users(a)lists.jboss.org
> Sent: Wednesday, May 19, 2010 5:12:57 PM
> Subject: [rules-users] Drools with Guvnor
>
>
> Hi,
>
> I am very new to Drools and very very new to Guvnor.
>
> I am in the process of creating a rule engine which will fetch the
> data from
> a source (I am using Hibernate framework to fetch the data) and
> evaluate the
> data using Drools rule engine. The rules supplied to the Drools rule
> engine
> are stored in a Rules table in a database.
>
> Now my question is that can I use Guvnor to store the rules (instead of
me
> creating a rule data model) and use Guvnor to supply rules to my Drools
> engine?
>
> I am trying to find out the best possible way to create / manage a rule
> database (which stores all the rules).
>
> Thanks,
> BB
> --
> View this message in context:
>
http://drools-java-rules-engine.46999.n3.nabble.com/Drools-with-Guvnor-tp...
> Sent from the Drools - User mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
> ------------------------------------------------------------------------
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
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Esteban Aliverti
5304
days inactive
5305
days old
2 comments
3 participants
participants (3)
-
Esteban Aliverti -
Jervisliu -
Michael Rhoden