6:52 a.m.
Hi all,
I have some problem with KnowledgeAgent, maybe you can help me. I will list
these in the following
1) during change set loading I have the following error
(null: 1, 207): schema_reference.4: Failed to read schema document
'drools-change-set-5.0.xsd', because 1) could not find the document; 2) the
document could not be read; 3) the root element of the document is not
<xsd:schema>.
(null: 1, 207): cvc-elt.1: Cannot find the declaration of element
'change-set'.
(null: 1, 216): schema_reference.4: Failed to read schema document
'drools-change-set-5.0.xsd', because 1) could not find the document; 2) the
document could not be read; 3) the root element of the document is not
<xsd:schema>.
(null: 1, 311): schema_reference.4: Failed to read schema document
'drools-change-set-5.0.xsd', because 1) could not find the document; 2) the
document could not be read; 3) the root element of the document is not
<xsd:schema>
I suppose this is because change-set.xml can be reached. What is a correct
setting for xs:schemaLocation.
2) I would like scan also a directories in order to add knowledge to my rule
set if I add a new file. How I can do that?
3) KnowledgeAgentConfiguration aconf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
aconf.setProperty("drools.agent.newInstance", "true") <== what is
the
meaning of this property? Where I can find documentation about those
properties
4) why when I would set a global variable I receive
Exception in thread "main" java.lang.RuntimeException: Unexpected global
[service]
at
org.drools.common.AbstractWorkingMemory.setGlobal(AbstractWorkingMemory.java:615)
at
org.drools.impl.StatefulKnowledgeSessionImpl.setGlobal(StatefulKnowledgeSessionImpl.java:332)
at
com.sample.DroolsKnowledgeAgentTest.main(DroolsKnowledgeAgentTest.java:90)
I the following an example about my question
@SuppressWarnings("restriction") public class DroolsKnowledgeAgentTest {
public static class Service {
}
DroolsKnowledgeAgentTest() {
KnowledgeBase newKnowledgeBase = KnowledgeBaseFactory.newKnowledgeBase();
ResourceFactory.getResourceChangeNotifierService()
.start();
ResourceFactory.getResourceChangeScannerService()
.start();
final ResourceChangeScannerConfiguration sconf =
ResourceFactory.getResourceChangeScannerService()
.newResourceChangeScannerConfiguration();
sconf.setProperty("drools.resource.scanner.interval", "2");
ResourceFactory.getResourceChangeScannerService()
.configure(sconf);
final KnowledgeAgentConfiguration aconf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
aconf.setProperty("drools.agent.scanDirectories", "true");
aconf.setProperty("drools.agent.scanResources", "true");
aconf.setProperty("drools.agent.newInstance", "true");
final KnowledgeAgent agent =
KnowledgeAgentFactory.newKnowledgeAgent("pch.sel.knowledge.agent",
newKnowledgeBase, aconf);
// if (_l.isDebugEnabled()) {
/* we need some log every time */
agent.setSystemEventListener(new PrintStreamSystemEventListener());
// }
}
public static void main(String[] args) throws IOException {
ResourceFactory.getResourceChangeNotifierService()
.start();
ResourceFactory.getResourceChangeScannerService()
.start();
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='Z:/WSP/drools-test/src/main/java/com/sample/rule1.drl' type='DRL'
/>";
xml += " </add> ";
xml += "</change-set>";
FileManager fileManager = new FileManager();
File fxml = fileManager.newFile("changeset.xml");
BufferedWriter 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();
ksession.setGlobal("service", new Service());
}
}
and rule named rule1.drl
#created on: 29-Feb-2012
package com.sample
#list any import classes here.
#declare any global variables here
global DroolsKnowledgeAgentTest.Service service;
rule "Your First Rule"
when
#conditions
then
#actions
end
Thank you very much for your answers and kind regards
Alberto
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7:19 a.m.
Hi Alberto
1) The XML parser is not validating, so that's not a real issue. If you
want, the actual changeset file header is:
<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/...
... </>
2) just use a "file:" URL pointing to the directory, but the folder will
have to contain resources of the same type
3) when set to true, a new KnowledgeBase instance will be created to apply
the changes, rather than updating the existing one. If you keep the old KB,
any object in a session obtained from that KB will be subject to the new
rules. You can also see the documentation.
4) the rule is declared in package com.sample, what about
DroolsKnowledgeAgentTest? If that's not in the same package, you'll need to
import it before you can declare a global DKAT.Service
Let me know if you have additional questions
Best,
Davide
(with some hints from Esteban Aliverti)
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7:23 a.m.
Thank you Davide,
I will try soon your suggestion about point 4, yes the class is in the same
package com.sample
Best,
Alberto
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7:35 a.m.
here again,
I tried to change url in a directory in this way
kagent.applyChangeSet(ResourceFactory.newUrlResource("file://Z:/WSP/drools-test/src/main/java/com/sample"));
kagent.setSystemEventListener(new PrintStreamSystemEventListener());
StatefulKnowledgeSession ksession = kagent.getKnowledgeBase()
.newStatefulKnowledgeSession();
ksession.setGlobal("service", new Service());
rule1.drl file is in the directory sample.
The KnowledgeAgenda seems wait few seconds then the exception is raised
again.
There is a new anyway, the application do not stop. Why?
Thank you for any help
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6:18 p.m.
@Alberto, Herman,
sorry, it seems that even the schemalocation I provided is outdated... The
xsd is actually included in the droolsjbpm-knowledge api, so it's part of
the distribution. It can also be found here
https://raw.github.com/droolsjbpm/droolsjbpm-knowledge/master/knowledge-a...
@Alberto:
the applyChangeSet method requires a ChangeSet resource. You should create a
changeset xml which contains the URLresource pointing to your directory.
This URLresource will contain the "file://..." URL and the resourcetype of
the items contained in the directory (e.g. DRLs)
If you configure the KA to monitor for changes (and activate the relative
scanner services), the KA will stay "alive" until you stop such
thread-animated functionalities, so make sure to stop and dispose everything
when you are done. You can read the details in section 4.2.6 of the
documentation, which is dedicated to the KA.
As for issue #4, I tried to reproduce it. If the package is the same, it
should work... which version of drools are you using?
Davide
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12:51 a.m.
On 1 March 2012 01:18, Davide Sottara <dsotty(a)gmail.com> wrote:
@Alberto:
the applyChangeSet method requires a ChangeSet resource. You should create
a
changeset xml which contains the URLresource pointing to your directory.
This URLresource will contain the "file://..." URL and the resourcetype of
the items contained in the directory (e.g. DRLs)
As for issue #4, I tried to reproduce it. If the package is the same, it
should work... which version of drools are you using?
Davide
If the session isn't derived from a Knowledge Base defining the
global, then this RuntimeException: Unexpected global [service] is
to be expected.
-W
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10:11 a.m.
There is the use case where the changeset.xml is read from Guvnor - that is what we are
trying to do, and we don't have the option to specify where the schema lives.
Perhaps schema validation should be false by default instead of true.
Herm
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On
Behalf Of Wolfgang Laun
Sent: Wednesday, February 29, 2012 11:51 PM
To: Rules Users List
Subject: Re: [rules-users] KnowledgeAgent Changeset problems
On 1 March 2012 01:18, Davide Sottara
<dsotty@gmail.com<mailto:dsotty@gmail.com>> wrote:
@Alberto:
the applyChangeSet method requires a ChangeSet resource. You should create a
changeset xml which contains the URLresource pointing to your directory.
This URLresource will contain the "file://..." URL and the resourcetype of
the items contained in the directory (e.g. DRLs)
As for issue #4, I tried to reproduce it. If the package is the same, it
should work... which version of drools are you using?
Davide
If the session isn't derived from a Knowledge Base defining the
global, then this RuntimeException: Unexpected global [service] is
to be expected.
-W
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11:43 a.m.
For your issue #1, we were having the same problem. In
org.drools.xml.ExtensibleXmlParser it appears that 'isValidating' defaults
to true. This field is tied to the property 'drools.schema.validating'.
The only way we have been able to avoid this error is by setting
-Ddrools.schema.validating=false when we boot JBoss. We think the reason
we see this and others may not is due to our proxy server.
Hope this helps,
Herm
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2:15 p.m.
I am also seeing an "unexpected global" in working code when built in the
"buidling using code" paradigm when moved to use changesets and
knowledgeagents. I also see this problem reported on another, non-Drools
site.
My global is a simple java.util.ArrayList <String> and I can see it in the
debugger in Java. The knowledgebase.rulebase.globals is null, as is
statefulsession.globalResolver.map.table. The changeset has had its
resources reduced to
<resource source=''classpath:/call2OfFareFamilies.drl'
type='DRL' />
A possibly related issue is that, despite not being explicitly loaded a
Drools ruleflow in a project in my buildpath is being shown in the "rules"
window (as well as the rules from the file above.) Thoughts?
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9:12 a.m.
Thank you every body for your answer, unfortunately I was't able to reply to
you until now because other stuff overwhelmed me literally at work.
Anyway I was going ahead using KnowledgeAgent, following your comments and
other suggestion. Now I am able to load rules applying change set with
KnowledgeAgent (thank you!!!), but honestly this is a poor success because,
even if when I change the rule KnowledgeAgent says "incremental build of
KnowledgeBase finished and in use" nothing changes.
It seems that changes at rules have no effect and it is pretty weird. I made
a maven project with eclipse to explain you better my problem. Is a simple
main. I am working for a better junit test. Anyway if you change the rule in
the folder knowledge you can test the problem by yourself.
Briefly I will explain the project:
Here the code:
_l.warn("START");
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='Z:/EXP/drools-test/knowledge/test.drl'
type='DRL' />";
xml += " </add> ";
xml += "</change-set>";
FileManager fileManager = new FileManager();
File fxml = fileManager.newFile("changeset.xml");
Writer output = new BufferedWriter(new FileWriter(fxml));
output.write(xml);
output.close();
// build a KnowledgeAgent
ResourceFactory.getResourceChangeNotifierService()
.start();
ResourceFactory.getResourceChangeScannerService()
.start();
final ResourceChangeScannerConfiguration sconf =
ResourceFactory.getResourceChangeScannerService()
.newResourceChangeScannerConfiguration();
sconf.setProperty("drools.resource.scanner.interval", "2");
ResourceFactory.getResourceChangeScannerService()
.configure(sconf);
final KnowledgeAgentConfiguration aconf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
aconf.setProperty("drools.agent.scanDirectories", "true");
aconf.setProperty("drools.agent.scanResources", "true");
/*
* important newInstance has to be false in order to update the
* knowledge base and not rebuild a new one
*/
aconf.setProperty("drools.agent.newInstance", "false");
final KnowledgeAgent agent =
KnowledgeAgentFactory.newKnowledgeAgent("pch.sel.knowledge.agent", aconf);
// if (_l.isDebugEnabled()) {
/* we need some log every time */
agent.setSystemEventListener(new PrintStreamSystemEventListener());
agent.applyChangeSet(ResourceFactory.newClassPathResource("pch.sel.kwset.xml"));
// fire rules
StatefulKnowledgeSession session =
agent.getKnowledgeBase().newStatefulKnowledgeSession();
session.fireAllRules();
_l.warn("END");
and here the rule
package it.ipiu.drools.KnowledgeAgent.test
rule "test rule" timer(int: 0s 2s)
when
eval(true);
then
System.out.println("ciao");
end
If I try to change timer from 2s to 2m nothing changes even if
KnowledgeAgent seems to reload all.
*Please help!!! I googled the problem everywhere without solution!!!*
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2:17 a.m.
Could you append the log output of the Knowledge Agent?
Best Regards,
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com
On Wed, Apr 4, 2012 at 4:12 PM, albertorugnone
<arugnonechemical(a)gmail.com>wrote:
Thank you every body for your answer, unfortunately I was't able
to reply
to
you until now because other stuff overwhelmed me literally at work.
Anyway I was going ahead using KnowledgeAgent, following your comments and
other suggestion. Now I am able to load rules applying change set with
KnowledgeAgent (thank you!!!), but honestly this is a poor success because,
even if when I change the rule KnowledgeAgent says "incremental build of
KnowledgeBase finished and in use" nothing changes.
It seems that changes at rules have no effect and it is pretty weird. I
made
a maven project with eclipse to explain you better my problem. Is a simple
main. I am working for a better junit test. Anyway if you change the rule
in
the folder knowledge you can test the problem by yourself.
Briefly I will explain the project:
Here the code:
_l.warn("START");
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='Z:/EXP/drools-test/knowledge/test.drl'
type='DRL' />";
xml += " </add> ";
xml += "</change-set>";
FileManager fileManager = new FileManager();
File fxml = fileManager.newFile("changeset.xml");
Writer output = new BufferedWriter(new FileWriter(fxml));
output.write(xml);
output.close();
// build a KnowledgeAgent
ResourceFactory.getResourceChangeNotifierService()
.start();
ResourceFactory.getResourceChangeScannerService()
.start();
final ResourceChangeScannerConfiguration sconf =
ResourceFactory.getResourceChangeScannerService()
.newResourceChangeScannerConfiguration();
sconf.setProperty("drools.resource.scanner.interval",
"2");
ResourceFactory.getResourceChangeScannerService()
.configure(sconf);
final KnowledgeAgentConfiguration aconf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
aconf.setProperty("drools.agent.scanDirectories",
"true");
aconf.setProperty("drools.agent.scanResources",
"true");
/*
* important newInstance has to be false in order to update
the
* knowledge base and not rebuild a new one
*/
aconf.setProperty("drools.agent.newInstance",
"false");
final KnowledgeAgent agent =
KnowledgeAgentFactory.newKnowledgeAgent("pch.sel.knowledge.agent", aconf);
// if (_l.isDebugEnabled()) {
/* we need some log every time */
agent.setSystemEventListener(new
PrintStreamSystemEventListener());
agent.applyChangeSet(ResourceFactory.newClassPathResource("pch.sel.kwset.xml"));
// fire rules
StatefulKnowledgeSession session =
agent.getKnowledgeBase().newStatefulKnowledgeSession();
session.fireAllRules();
_l.warn("END");
and here the rule
package it.ipiu.drools.KnowledgeAgent.test
rule "test rule" timer(int: 0s 2s)
when
eval(true);
then
System.out.println("ciao");
end
If I try to change timer from 2s to 2m nothing changes even if
KnowledgeAgent seems to reload all.
*Please help!!! I googled the problem everywhere without solution!!!*
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4:38 a.m.
This is what I have
11:36:48,888 [it.ipiu.drools.KnowledgeAgent.TestKnowledgeAgent] WARN
TestKnowledgeAgent : START
[2012-04-06 11:36:50,298:info] KnowledgeAgent applying ChangeSet
[2012-04-06 11:36:50,316:debug] KnowledgeAgent subscribing to
directory=[UrlResource path='file:/Z:/EXP/drools-test/knowledge']
[2012-04-06 11:36:50,318:debug] KnowledgeAgent mapping
resource=[FileResource file='Z:\EXP\drools-test\knowledge\test.drl'] to
KnowledgeDefinition=null
[2012-04-06 11:36:50,318:debug] KnowledgeAgent notifier subscribing to
resource=[FileResource file='Z:\EXP\drools-test\knowledge\test.drl']
[2012-04-06 11:36:50,318:debug] KnowledgeAgent notifier subscribing to
resource=[FileResource file='Z:\EXP\drools-test\knowledge\test.drl']
[2012-04-06 11:36:50,318:debug] KnowledgeAgent rebuilding KnowledgeBase
using ChangeSet
[2012-04-06 11:36:50,659:info] KnowledgeAgent performing an incremental
build of the ChangeSet
[2012-04-06 11:36:52,176:debug] KnowledgeAgent building resource map
[2012-04-06 11:36:52,176:debug] KnowledgeAgent no resource mapped for
rule=[Rule name=test rule, agendaGroup=MAIN, salience=0, no-loop=false]
[2012-04-06 11:36:52,177:debug] KnowledgeAgent mapping
resource=[FileResource file='Z:\EXP\drools-test\knowledge\test.drl'] to
KnowledgeDefinition=[Rule name=test rule, agendaGroup=MAIN, salience=0,
no-loop=false]
[2012-04-06 11:36:52,177:info] KnowledgeAgent incremental build of
KnowledgeBase finished and in use
[2012-04-06 11:36:52,177:debug] KnowledgeAgent finished rebuilding
KnowledgeBase using ChangeSet
11:36:52,357 [it.ipiu.drools.KnowledgeAgent.TestKnowledgeAgent] WARN
TestKnowledgeAgent : END
ciao
ciao
ciao
...
[2012-04-06 11:37:19,264:debug] KnowledgeAgent received ChangeSet changed
notification
[2012-04-06 11:37:19,264:info] KnowledgeAgent applying ChangeSet
[2012-04-06 11:37:19,265:debug] KnowledgeAgent removing mappings for
resource=[FileResource file='Z:\EXP\drools-test\knowledge\test.drl'] with
unsubscribe=false
[2012-04-06 11:37:19,265:debug] KnowledgeAgent rebuilding KnowledgeBase
using ChangeSet
[2012-04-06 11:37:19,270:info] KnowledgeAgent performing an incremental
build of the ChangeSet
[2012-04-06 11:37:19,296:debug] KnowledgeAgent: Diffing: [FileResource
file='Z:\EXP\drools-test\knowledge\test.drl']
[2012-04-06 11:37:19,316:debug] KnowledgeAgent mapping
resource=[FileResource file='Z:\EXP\drools-test\knowledge\test.drl'] to
KnowledgeDefinition=[Rule name=test rule, agendaGroup=MAIN, salience=0,
no-loop=false]
[2012-04-06 11:37:19,317:debug] KnowledgeAgent building resource map
[2012-04-06 11:37:19,317:debug] KnowledgeAgent no resource mapped for
rule=[Rule name=test rule, agendaGroup=MAIN, salience=0, no-loop=false]
[2012-04-06 11:37:19,317:info] KnowledgeAgent incremental build of
KnowledgeBase finished and in use
[2012-04-06 11:37:19,317:debug] KnowledgeAgent finished rebuilding
KnowledgeBase using ChangeSet
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11 comments
7 participants
participants (7)
-
albertorugnone -
Davide Sottara -
drdaveg -
Esteban Aliverti -
Herman Post -
Hrumph
-
Wolfgang Laun