Creating a KnowledgeBase using a KnowledgeAgent, KnowledgeAgentConfiguration and KnowledgeBaseConfiguration
11:03 a.m.
Hi,
I want to create a KnowledgeBase using stream processing mode, getting
its resources from an change-set xml and getting the updated when
resources are changed. So far I'm aware I need a KnowledgeAgent and a
configuration for the kagent and the kbase.
My code is:
// create knowledge base
// knowledge base configuration
KnowledgeBaseConfiguration kbaseConf =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
kbaseConf.setOption(EventProcessingOption.STREAM);
// knowledge base
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(kbaseConf);
// create knowledge agent
// create knowledge agent configuration
KnowledgeAgentConfiguration kagentConf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
//enable incremental knowledge base build
kagentConf.setProperty("drools.agent.newInstance", "false");
//create knowledge agent
KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent("AITS CEP Engine Agent",
kbase, kagentConf);
// apply change-set XML to knowledge agent
kagent.applyChangeSet(ResourceFactory.newClassPathResource("changeset.xml"));
// get updated knowledge base object
kbase = kagent.getKnowledgeBase();
// create session
session = kbase.newStatefulKnowledgeSession();
Can it be done in a more compact way?
Thank you! :)
Tina
2:35 p.m.
I think that is the minimum code needed to create a kagent with custom
configuration.
The only line you could remove is:
kbase = kagent.getKnowledgeBase();
Because you are using incremental change-set processing (
drools.agent.newInstance = false), you don't need to obtain a reference to
the new kbase, because there is no new kbase. The agent will use the same
kbase you provided.
If you don't want to use incremental change-set processing, then you must
keep that line, and you could remove any reference to
KnowledgeAgentConfiguration.
Best,
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com
2010/8/23 Tina Vießmann <tviessmann(a)stud.hs-bremen.de>
Hi,
I want to create a KnowledgeBase using stream processing mode, getting its
resources from an change-set xml and getting the updated when resources are
changed. So far I'm aware I need a KnowledgeAgent and a configuration for
the kagent and the kbase.
My code is:
// create knowledge base
// knowledge base configuration
KnowledgeBaseConfiguration kbaseConf =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
kbaseConf.setOption(EventProcessingOption.STREAM);
// knowledge base
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(kbaseConf);
// create knowledge agent
// create knowledge agent configuration
KnowledgeAgentConfiguration kagentConf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
//enable incremental knowledge base build
kagentConf.setProperty("drools.agent.newInstance", "false");
//create knowledge agent
KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent("AITS CEP
Engine Agent", kbase, kagentConf);
// apply change-set XML to knowledge agent
kagent.applyChangeSet(ResourceFactory.newClassPathResource("changeset.xml"));
// get updated knowledge base object
kbase = kagent.getKnowledgeBase();
// create session
session = kbase.newStatefulKnowledgeSession();
Can it be done in a more compact way?
Thank you! :)
Tina
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12:55 a.m.
New subject: How to check for errors when creating a kBase using kAgent, kAgentConfiguration and kBaseConfiguration
What's the best way for checking for errors when using the following
code for creating a kbase?
// ResourceChangeScanner
ResourceChangeScannerConfiguration sconf =
ResourceFactory.getResourceChangeScannerService().newResourceChangeScannerConfiguration();
sconf.setProperty("drools.resource.scanner.interval", "10");
ResourceFactory.getResourceChangeScannerService().configure(sconf);
ResourceFactory.getResourceChangeNotifierService().start();
ResourceFactory.getResourceChangeScannerService().start();
// knowledge base
KnowledgeBaseConfiguration kbaseConf =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
kbaseConf.setOption(EventProcessingOption.STREAM);
kbaseConf.setOption(MBeansOption.ENABLED);
KnowledgeBase kbase =
KnowledgeBaseFactory.newKnowledgeBase(kbaseConf);
// knowledge agent
KnowledgeAgentConfiguration kagentConf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
kagentConf.setProperty("drools.agent.newInstance", "false");
KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent("AITS CEP Engine Agent", kbase,
kagentConf);
kagent.applyChangeSet(ResourceFactory.newClassPathResource(myFile));
// session
fSession = kbase.newStatefulKnowledgeSession();
Thank you.
Tina
1:41 p.m.
New subject: How to check for errors when creating a kBase using kAgent, kAgentConfiguration and kBaseConfiguration
Hi,
If you are using 5.1 or greater, you can use a KnowledgeAgentEventListener
to be notified when resource's compilation fails. You can create your own
implementation of KnowledgeAgentEventListener, or you can
use DefaultKnowledgeAgentEventListener and override just the methods you
need:
kagent.addEventListener(new DefaultKnowledgeAgentEventListener() {
public void resourceCompilationFailed(ResourceCompilationFailedEvent
event) {
//ResourceCompilationFailedEvent contains a reference to kagent's
kbuilder. You can use it to see what happened.
}
});
Best,
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com
On Sun, Oct 24, 2010 at 7:55 PM, Tina Vießmann <tviessmann(a)stud.hs-bremen.de
wrote:
What's the best way for checking for errors when using the
following
code for creating a kbase?
// ResourceChangeScanner
ResourceChangeScannerConfiguration sconf =
ResourceFactory.getResourceChangeScannerService().newResourceChangeScannerConfiguration();
sconf.setProperty("drools.resource.scanner.interval", "10");
ResourceFactory.getResourceChangeScannerService().configure(sconf);
ResourceFactory.getResourceChangeNotifierService().start();
ResourceFactory.getResourceChangeScannerService().start();
// knowledge base
KnowledgeBaseConfiguration kbaseConf =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
kbaseConf.setOption(EventProcessingOption.STREAM);
kbaseConf.setOption(MBeansOption.ENABLED);
KnowledgeBase kbase =
KnowledgeBaseFactory.newKnowledgeBase(kbaseConf);
// knowledge agent
KnowledgeAgentConfiguration kagentConf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
kagentConf.setProperty("drools.agent.newInstance", "false");
KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent("AITS CEP Engine Agent", kbase,
kagentConf);
kagent.applyChangeSet(ResourceFactory.newClassPathResource(myFile));
// session
fSession = kbase.newStatefulKnowledgeSession();
Thank you.
Tina
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12:08 a.m.
New subject: How to check for errors when creating a kBase using kAgent, kAgentConfiguration and kBaseConfiguration
Thank you. :)
And how do I catch the exceptions occurring while processing and
executing the rules?
Hi,
If you are using 5.1 or greater, you can use
a KnowledgeAgentEventListener to be notified when resource's
compilation fails. You can create your own implementation
of KnowledgeAgentEventListener, or you can
use DefaultKnowledgeAgentEventListener and override just the methods
you need:
kagent.addEventListener(new DefaultKnowledgeAgentEventListener() {
public void
resourceCompilationFailed(ResourceCompilationFailedEvent event) {
//ResourceCompilationFailedEvent contains a reference to
kagent's kbuilder. You can use it to see what happened.
}
});
Best,
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Esteban Aliverti
- Developer @ http://www.plugtree.com <http://www.plugtree.com>
- Blog @ http://ilesteban.wordpress.com
On Sun, Oct 24, 2010 at 7:55 PM, Tina Vießmann
<tviessmann(a)stud.hs-bremen.de <mailto:tviessmann@stud.hs-bremen.de>>
wrote:
What's the best way for checking for errors when using the following
code for creating a kbase?
// ResourceChangeScanner
ResourceChangeScannerConfiguration sconf =
ResourceFactory.getResourceChangeScannerService().newResourceChangeScannerConfiguration();
sconf.setProperty("drools.resource.scanner.interval",
"10");
ResourceFactory.getResourceChangeScannerService().configure(sconf);
ResourceFactory.getResourceChangeNotifierService().start();
ResourceFactory.getResourceChangeScannerService().start();
// knowledge base
KnowledgeBaseConfiguration kbaseConf =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
kbaseConf.setOption(EventProcessingOption.STREAM);
kbaseConf.setOption(MBeansOption.ENABLED);
KnowledgeBase kbase =
KnowledgeBaseFactory.newKnowledgeBase(kbaseConf);
// knowledge agent
KnowledgeAgentConfiguration kagentConf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
kagentConf.setProperty("drools.agent.newInstance",
"false");
KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent("AITS CEP Engine Agent",
kbase,
kagentConf);
kagent.applyChangeSet(ResourceFactory.newClassPathResource(myFile));
// session
fSession = kbase.newStatefulKnowledgeSession();
Thank you.
Tina
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11:30 a.m.
New subject: How to check for errors when creating a kBase using kAgent, kAgentConfiguration and kBaseConfiguration
2010/10/30 Tina Vießmann <tviessmann(a)stud.hs-bremen.de>
And how do I catch the exceptions occurring while processing and executing
the rules?
From my home page <http://members.inode.at/w.laun/>;: How to Implement Custom
Consequence Exception
Handling<http://members.inode.at/w.laun/drools/CustomConsequenceExceptionHandlingHowTo.html>
-W
3:39 p.m.
New subject: How to check for errors when creating a kBase using kAgent, kAgentConfiguration and kBaseConfiguration
Remember that errors while processing the rules occur when you insert/update
facts (when the LHS of the rules is evaluated). Using a
ConsequenceExceptionHandler you will be able to catch only exception
occurred in the RHS of the rules (when the activations are fired).
Best,
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com
2010/10/30 Wolfgang Laun <wolfgang.laun(a)gmail.com>
2010/10/30 Tina Vießmann <tviessmann(a)stud.hs-bremen.de>
>
> And how do I catch the exceptions occurring while processing and executing
> the rules?
>
>
From my home page <http://members.inode.at/w.laun/>;: How to Implement
Custom Consequence Exception
Handling<http://members.inode.at/w.laun/drools/CustomConsequenceExceptionHandlingHowTo.html>
-W
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6 comments
4 participants
participants (4)
-
Esteban Aliverti -
esteban.aliverti＠gmail.com
-
Tina Vießmann -
Wolfgang Laun