Consume Dymanic rules from application
by Anton
Hi,
I have been trying to consume the dynamic rules from another application..
Could not accomplish this..
Following is the setup, please identify what has been missed.
Have workbench 6.0.1 working
Able to create rules and build and deploy
Have the rules at local maven repository
Able to see the rules in the remote repository as well. Thru
http://localhost:8080/context/maven2
I have Kie-ci-6.0.1.jar in my external applications classpath
Added the repository details in settings.xml both at
mavenhome/conf/settings.xml and user_home/.m2/settings.xml
Still I am not able to use the rules from the remore repository. Please
point out anything I am missing.
Regards,
Anton
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12 years
Drools Declaring New Types To Use Across Multiple Files
by Jan Šťastný
Hi,
can anybody tell me, how can I declare a type which I can use in
multiple files?
Sure, I can create a java class and then import to respective files. But
I was wondering whether there was a solution which wouldn't demand
compilation of source code after each change of rules (extending the
rules with new type which is java class would require that).
Any suggestion appreciated.
Regards
Jan
12 years
KIE API for Decision Tables Templates
by Andrei Ermicioi
Hi there!
I was looking on web to find if KIE provide any API for reading the Decision Tables from XLS/CSV and I was not able to find :(
Can somebody point me where I can find that or just to tell me if such API exist or not.
Thank you.
--
Andrei Ermicioi aka erani,
Software Engineer at CaseNet
Phone: +420 776 424 143
Skype: aermicioi_casenet
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12 years
What is the compatibility matric of kie workbench 6.0.x and 6.1.x?
by Shrinath Managuli
Hi,
Will workbench 6.0 deploy on jdk7 and jee 6 and will the same work for 6.1.x?
I'm trying to deploy on WAS 8.5.5 running jdk 7.
Thanks,
Shrinath Managuli
[Aspire Systems]
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12 years
Memory leak due CompositeClassLoader
by Romain Thouvenin
Hello,
I am working on a Web application that uses a third-party component that
uses Drools 5.2.1 (I know this is old, but this is not my choice).
While investigating memory leaks in my application, I found out that after
redeploying the webapp in the application server (Weblogic), the leaking
class loader is referenced by:
org.drools.util.CompositeClassLoader.classLoaders
This is because when that class is instantiated by
org.drools.util.ClassLoaderUtil, the initial list of class loaders
includes the context class loader of the current thread, which is the
class loader of my webapp. But the class loader of CompositeClassLoader is
not the same as my webapp, so when I redeploy my webapp
CompositeClassLoader continues to exist and keep that reference to the
webapp class loader, which is therefore never garbage-collected.
Browsing a bit through the code, I see no reference to
CompositeClassLoader.removeClassLoader that could remove the faulty
reference.
So my questions are:
1) Is my investigation correct?
2) I found this thread on the list:
http://drools.46999.n3.nabble.com/permgen-leak-td4027038i20.html
Is this the same issue as mine, meaning that it is fixed in 5.6.0 and 6.0?
If yes, pushing this third-party component to upgrade is really the only
solution I have?
I am not at all a knowledgeable user of drools, I just happen to be user
of that third-party component, that is why I wanted confirmation of my
findings.
Thanks for your help!
Romain
12 years
Linkage Error In execute method
by Karan Malhotra
Hi All,
We have recently upgraded our application from 5.1.0 to 5.4.0.Final.
Everything worked well until this was deployed at Production Envr. We started getting multiple Linkage Error in execute method of Stateless KnowledgeSession.
StackTrace:
Exception: java.util.concurrent.ExecutionException: java.lang.LinkageError: loader (instance oforg/drools/rule/JavaDialectRuntimeData$PackageClassLoader): attemptedduplicate class definition for name: "OffBarCapping/Rule_Off_Bar_Tariff_Capping_13_2a4a909def69414bbd60cdfdac9ad807"|
OffBarCapping/Rule_Off_Bar_Tariff_Capping_16_6b6f1282708449448fc434e820fa8e1f# at OffBarCapping.Rule_Off_Bar_Tariff_Capping_16_6b6f1282708449448fc434e820fa8e1fPredicate0InvokerGenerated.evaluate(Unknown Source)# at OffBarCapping.Rule_Off_Bar_Tariff_Capping_16_6b6f1282708449448fc434e820fa8e1fPredicate0Invoker.evaluate(Unknown Source)# at org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:299)# at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137)# at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497)# at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382)# at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)# at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)# at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:337)# at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:298)# at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:888)# at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:847)# at org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:269)# at org.drools.impl.StatelessKnowledgeSessionImpl.execute(StatelessKnowledgeSessionImpl.java:294)#
1. Some surfing on the internet referred us to a similar JIRA issue:- JBRULES-3675<https://issues.jboss.org/browse/JBRULES-3675>
It says this has been fixed in 6.0.0. We were not in a position to upgrade to 6.0.0 right away and hence decide to apply a patch in drools-core-5.4.0.Final.jar
Drools: 5.4.0
public Class<?> More ...fastFindClass( final String name ) {
Class<?> cls = findLoadedClass( name );
if (cls == null) {
final byte[] clazzBytes = this.store.read( convertClassToResourcePath( name ) );
if (clazzBytes != null) {
String pkgName = name.substring( 0,
name.lastIndexOf( '.' ) );
if (getPackage( pkgName ) == null) {
definePackage( pkgName,
"",
"",
"",
"",
"",
"",
null );
}
cls = defineClass( name,
clazzBytes,
0,
clazzBytes.length,
PROTECTION_DOMAIN );
}
if (cls != null) {
resolveClass( cls );
}
}
return cls;
}
Path applied:-
public Class fastFindClass(String name)
{
Class cls = findLoadedClass(name);
if(cls == null)
{
byte clazzBytes[] = store.read(JavaDialectRuntimeData.convertClassToResourcePath(name));
if(clazzBytes != null)
{
String pkgName = name.substring(0, name.lastIndexOf('.'));
if(!existingPackages.contains(pkgName))
{
synchronized(this)
{
if(!existingPackages.contains(pkgName))
{
if(getPackage(pkgName) == null)
{
definePackage(pkgName, "", "", "", "", "", "", null);
}
existingPackages.add(pkgName);
}
}
}
cls = defineClass(name, clazzBytes, 0, clazzBytes.length, JavaDialectRuntimeData.access$000());
}
if(cls != null)
{
resolveClass(cls);
}
}
return cls;
}
But we are still getting this Error.
Let me know if any one did face a similar issue and solution for the same.
Thanks and regards,
Karan Malhotra
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12 years, 1 month
Drools Workbench Camel integration
by Anton
Hi,
We are looking for the way to consume the DRLs managed in the Drools
workbench in the camel and expose them as services to the clients.
We have tried it with the sample examples (with drl files) provided in the
camel integration example and found it working. Using drools 6.0.1, now how
the workbench knowledge base should be added to the camel knowledge
services?
Searched a lot, could not find a reference/help on this regard? We are
looking for XML element like below for the file based integration
<kie:kbase name="kbase1" packages="org.drools.server">
<kie:ksession name="ksession1" type="stateless"/>
</kie:kbase>
>From the Java application, we are able to run against the workbench
knowledgebase dynamically (using maven release id). How this should be
integrated with camel services?
Regards,
Anton
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12 years, 1 month
Deploying kie-drools workbench 6.1 beta on websphere liberty 8.5.5 gives classpath errors
by Shrinath Managuli
Hi ,
I ran kie-drools workbench 6.1 beta on websphere liberty 8.5.5 and gives manifest file related errors as below. I tried to add jars but spent all the time just find that again it asks for other jars in loop with different versions of same jars.
Need help on this..
Error:
The manifest class path avalon-framework-4.2.0.jar can not be found in jar file file:/D:/Program%20Files/IBM/Liberty/usr/servers/guvnor/apps/drools6/WEB-INF/lib/fop-0.95.jar or its parent.
[4/4/14 18:31:12:530 IST] 00000012 m.ibm.ws.container.service.app.deploy.ManifestClassPathUtils W SRVE9967W: The manifest class path batik-all-1.7.jar can not be found in jar file file:/D:/Program%20Files/IBM/Liberty/usr/servers/guvnor/apps/drools6/WEB-INF/lib/fop-0.95.jar or its parent.
[4/4/14 18:31:12:531 IST] 00000012 m.ibm.ws.container.service.app.deploy.ManifestClassPathUtils W SRVE9967W: The manifest class path commons-io-1.3.1.jar can not be found in jar file file:/D:/Program%20Files/IBM/Liberty/usr/servers/guvnor/apps/drools6/WEB-INF/lib/fop-0.95.jar or its parent.
[4/4/14 18:31:12:531 IST] 00000012 m.ibm.ws.container.service.app.deploy.ManifestClassPathUtils W SRVE9967W: The manifest class path commons-logging-1.0.4.jar can not be found in jar file file:/D:/Program%20Files/IBM/Liberty/usr/servers/guvnor/apps/drools6/WEB-INF/lib/fop-0.95.jar or its parent.
[4/4/14 18:31:12:532 IST] 00000012 m.ibm.ws.container.service.app.deploy.ManifestClassPathUtils W SRVE9967W: The manifest class path serializer-2.7.0.jar can not be found in jar file file:/D:/Program%20Files/IBM/Liberty/usr/servers/guvnor/apps/drools6/WEB-INF/lib/fop-0.95.jar or its parent.
.......
Thanks
Shrinath
[Aspire Systems]
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12 years, 1 month
Drools Fusion inconsistencies at increasing event throughputs
by Vieri
Dear Drools Experts,
*Short version*
1. Cron-based rules triggers (more than once) for a full second, rather
than once every defined period;
2. After some time, event creation from the drl seems to hang. The "time
to hang" decreases as we increase the throughput of incoming events;
3. The two issues seem to be somehow related (well, maybe).
*Full version*
We are testing Drools Fusion to implement CEP functionalities in our
platform. We are performing these tests using Drools 6.0.1.Final.
As a basic test case, we set up a synthetic stream of events, and defined a
couple of rules to implement a simple throughput metric. Here's the
complete drl:
*package* it.intext.unity.test
*import* it.intext.unity.test.SynthEvent;
*import* java.util.Date;
*global* org.slf4j.Logger logger;
*declare* SynthEvent
@role( event )
@timestamp( timestamp )
*end*
*declare* EventCounter
@role( event )
@timestamp( timestamp )
id : *long*
key : String
timestamp : Date
*end*
// Business rules
*rule* "Create counter"
*when*
$e : SynthEvent() *from* entry-point "synth"
*then*
entryPoints["counters"].*insert*(*new* EventCounter( $e.getId(), "event",
$e.getTimestamp() ) );
*end*
// Metrics
*rule* "Count epm"
// Emit count every 10s, accumulate over 1m
timer ( cron: 0/10 * * * * ? )
*when*
Number( $count : intValue ) *from* *accumulate*(
EventCounter( key == "event" ) over window:time( 60s
)*from*entry-point
"counters", count(1) )
*then*
logger.debug("epm = {}", $count );
*end*
The SynthEvent class is very basic:
*public* *class* SynthEvent {
*long* id;
Date timestamp;
List<String> meta;
... // Getters/Setters and constructors omitted
}
Now, the test is performed running the session in one thread (code below)
*private* *void* process(*final* KieSession session) {
*new* Thread(){
*public* *void* run() {
session.fireUntilHalt();
};
}.start();
}
while feeding the events on a second thread (code below)
*private* *void* feed(*final* KieSession session) {
*new* Thread(){
@SuppressWarnings("unchecked")
*public* *void* run() {
*try* {
*int* counter = 0;
*while*(*true*) {
counter++;
session.execute(CommandFactory.
*newInsert*(createEvent(), *null*, *false*, "synth"));
Thread.*sleep*(getSleepRate());
*if* ((counter % 1000) == 0) {
*logger*.debug("Total events: {}",
counter);
}
}
} *catch* (InterruptedException e) {
*logger*.warn("{}", e);
}
};
}.start();
}
I expected the cron rule "count epm" to trigger once every 10 seconds. But
here's an extract from the log (running at 5 events per second +/- 20%):
[DEBUG] 2014-03-25 04:56:10.008
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 1
[DEBUG] 2014-03-25 04:56:10.075
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 2
[DEBUG] 2014-03-25 04:56:10.262
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 3
[DEBUG] 2014-03-25 04:56:10.507
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 4
[DEBUG] 2014-03-25 04:56:10.678
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 5
[DEBUG] 2014-03-25 04:56:10.871
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 6
[DEBUG] 2014-03-25 04:56:20.001
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 50
[DEBUG] 2014-03-25 04:56:20.042
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 51
[DEBUG] 2014-03-25 04:56:20.231
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 52
[DEBUG] 2014-03-25 04:56:20.405
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 53
[DEBUG] 2014-03-25 04:56:20.647
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 54
[DEBUG] 2014-03-25 04:56:20.823
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 55
[DEBUG] 2014-03-25 04:56:20.992
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 56
As you can see, the "count epm" rules fires once per incoming event for a
full second (e.g. for the second cycle we see the first activation at
04:56:20.001 and the last one at 04:56:20.992).
This is not a major issue, since it can be solved with a sort-of
publish/subscribe pattern which, BTW, increases the system stability (if
anyone is interested I can post more details on the list).
Anyhow, the test ran for more than 20' consistently until we decided it was
enough.
Now, the problem is that as we increase the throughput (e.g. 50 events per
second), the test runs for a few minutes before it becomes inconsistent.
The evidence is that the first rule stops to trigger, and EventCounter
aren't created anymore. Here's a log extract:
[DEBUG] 2014-03-25 07:37:40.008
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 199
[DEBUG] 2014-03-25 07:37:40.017
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 200
[DEBUG] 2014-03-25 07:37:40.034
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 201
[DEBUG] 2014-03-25 07:37:40.058
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 202
[DEBUG] 2014-03-25 07:37:40.076
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 203
*... here the system is stable as we get about 3K events per minute as
expected*
[DEBUG] 2014-03-25 07:38:36.022 (StreamTester.java:run:70) Total events:
3000
[DEBUG] 2014-03-25 07:38:40.001
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 2999
[DEBUG] 2014-03-25 07:38:40.016
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 2998
[DEBUG] 2014-03-25 07:38:40.024
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 2999
[DEBUG] 2014-03-25 07:38:40.034
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 2998
[DEBUG] 2014-03-25 07:38:40.047
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 2999
[DEBUG] 2014-03-25 07:38:40.057
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 2998
...
[DEBUG] 2014-03-25 07:39:50.974
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 3008
[DEBUG] 2014-03-25 07:39:50.988
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 3007
[DEBUG] 2014-03-25 07:39:50.996
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 3008
[DEBUG] 2014-03-25 07:39:55.842 (StreamTester.java:run:70) Total events:
7000
*... Somewhere in between the system becomes inconsistent and the number of
events decreases to 0*
[DEBUG] 2014-03-25 07:40:00.001
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 2734
[DEBUG] 2014-03-25 07:40:00.017
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 2733
[DEBUG] 2014-03-25 07:40:00.037
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 2732
...
[DEBUG] 2014-03-25 07:40:50.937
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 181
[DEBUG] 2014-03-25 07:40:50.953
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 180
[DEBUG] 2014-03-25 07:40:50.975
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 179
[DEBUG] 2014-03-25 07:40:50.997
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 178
[DEBUG] 2014-03-25 07:40:55.438 (StreamTester.java:run:70) Total events:
10000
[DEBUG] 2014-03-25 07:41:00.001
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 0
[DEBUG] 2014-03-25 07:41:10.001
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 0
We added a quick rule to count "live EventCounter"
*rule* "Count live counters"
timer ( cron: 0/60 * * * * ? )
*when*
Number( $count : intValue ) *from* *accumulate*(
EventCounter( key == "event" ) *from* entry-point "counters",
count(1) )
*then*
logger.debug("Live counters = {}", $count );
*end*
and, again, the evidence is that when things go wrong the EventCounter
events aren't created anymore.
[DEBUG] 2014-03-25 07:40:55.438 (StreamTester.java:run:70) Total events:
10000
[DEBUG] 2014-03-25 07:41:00.001
(Rule_Count_live_counters1625367465.java:defaultConsequence:14) Live
counters = 0
[DEBUG] 2014-03-25 07:41:00.001
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 0
[DEBUG] 2014-03-25 07:41:10.001
(Rule_Count_epm442808096.java:defaultConsequence:14) epm = 0
Adding a debug line in the "Create counter" rule confirm this hypotesis
(after a while the rule won't trigger anymore). Modified rule is:
*rule* "Create counter"
*when*
$e : SynthEvent() *from* entry-point "synth"
*then*
entryPoints["counters"].*insert*( *new* EventCounter( $e.getId(),
"event", $e.getTimestamp() ) );
*if* (Math.random() < 0.01) logger.debug("New event: {}", $e.getId());
*end*
When the system becomes inconsistent, we stop seeing "New event" log lines.
What are we missing? Any suggestion? Anyone experienced the same problems
we have?
Your help will be greatly appreciated.
Thanks in advance,
Vieri
12 years, 1 month
Re: [rules-users] rules-users Digest, Vol 89, Issue 11
by Mallikarjun Kohalli (mkohalli)
Hi All,
I have a single thread executing all my rules in DROOLS 5.1.0.Can I enable multiple threads to be running in the drools using thread pool to execute the rules so that execution can be faster .
I would like to know the configurations that should be made in 5.1.0 verison .
Regards,
Mallikarjun K
-----Original Message-----
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of rules-users-request(a)lists.jboss.org
Sent: Thursday, April 03, 2014 1:13 PM
To: rules-users(a)lists.jboss.org
Subject: rules-users Digest, Vol 89, Issue 11
Send rules-users mailing list submissions to
rules-users(a)lists.jboss.org
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.jboss.org/mailman/listinfo/rules-users
or, via email, send a message with subject or body 'help' to
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You can reach the person managing the list at
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When replying, please edit your Subject line so it is more specific than "Re: Contents of rules-users digest..."
Today's Topics:
1. Re: External Imports (Michael Anstis)
2. Re: Memory leak due CompositeClassLoader (Romain Thouvenin)
3. Re: Random rule fire (Wolfgang Laun)
4. Re: Random rule fire (Wolfgang Laun)
5. Re: Drools 6 and OSGi (Florian Pirchner)
----------------------------------------------------------------------
Message: 1
Date: Thu, 3 Apr 2014 07:03:09 +0100
From: Michael Anstis <michael.anstis(a)gmail.com>
Subject: Re: [rules-users] External Imports
To: Rules Users List <rules-users(a)lists.jboss.org>
Message-ID:
<CAAG9P0vfshuCiYWhpVEBJvOe3Eh58xj3RdCYCdRYte0YeCW07A(a)mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
These should be added as "Import suggestions" in the Project Editor in the Authoring Perspective.
Sent on the move
On 2 Apr 2014 22:22, "vvicky72" <vvicky72(a)hotmail.com> wrote:
> I am using the latest drools wb on jboss as7.
>
> Trying to add java.lang.ArrayList to the project.imports. But the New
> item button is disabled. Screen shot attached. Any ideas?
> <http://drools.46999.n3.nabble.com/file/n4029102/DroolsCannotImport.jp
> g>
>
> Thanks,
> Vikas.
>
>
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/External-Imports-tp4029102.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
12 years, 1 month
