Re: [rules-users] Drools Flow :Persistence Problem : Restore StatefulKnowledgeSession from database
by Pardeep.Ruhil＠lntinfotech.com
Hi Mauricio,
Thanks for you reply. I have one more doubt in this.
Will the drool-persistence will work for two or more workflow running
simultaneously ?
Also these workflow will use the same schema for all the workflows.
Looking from the table that are generated in the database, it seems that
database design is done keeping only one workflow running at a time.
Am I thinking correct ?
Please help me to get the solution.
Thanks & Regards
Pardeep Ruhil
______________________________________________________________________
16 years, 8 months
Re: [rules-users] Drools solver info => provide DSL instead of DRL to Drools Solver
by Geoffrey De Smet
Hi Marco,
[I've send this answer to the drools user list,
please post any follow ups on the user list instead of mailing it
directly to me.
You can use nntp://news.gmane.org #gmane.comp.java.drools.user if you
want to keep your mailbox clean.]
Drools Solver's xml configuration doesn't support <scoreDsl> entry's yet
That shouldn't be to much work. I just created a JIRA for it:
https://jira.jboss.org/jira/browse/JBRULES-2333
Patch welcome (attached to that jira) and I would apply it within a week
on trunk.
Short of doing the patch on trunk, you can do this workaround:
- build the Solver directly yourself (basically just fisheye.jboss.org
for XmlSolverConfigurer's code). Not recommended.
- supply a an empty drl to <scoreDrl>, build the Solver, cast it to
DefaultLocalSearchSolver and replace the rulebase.
Both are not ideal in the long run though.
With kind regards,
Geoffrey De Smet
Marco caminiti schreef:
> Hi Geoffrey,
> I'm Marco Caminiti an Italian student of computer engineering. I'm
> using drools solver for my thesis and I have a problem.
>
> For the thesis I made a model of bin packing writing the rules on a
> drl file, and thus far, so good.
>
> Now I want to rewrite the rules that must use the solver in a specific
> language, but if I put in the configuration file of the solver the URL
> of the file DSL (or file DSLR) the solver crashes because it can not
> be configured.
>
> I ask whether you can use the solver with DSL tool and if so how could
> I do.
>
> Sorry to bother you but on this argument I have not found
> documentation on the Internet, more than anything else I'm sorry for
> my English.
>
> Thanks from now for the answer.
> Marco Caminiti
>
>
16 years, 8 months
ConcurrentModificationException at org.drools.reteoo.ClassObjectTypeConf.getMatchingObjectTypes
by karthizap
I am using Drools-core.jar(version-5.0.0.CR1) and getting the following
exception. I could see similar stacktrace reported with
JIRA-1888(https://jira.jboss.org/jira/browse/JBRULES-1888) and its marked as
closed. Fix related to this Jira is not available (Rete.java) in the Drools
5.0.1 and 5.1.0 source code/drools-core jar files.
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException {
entryPoints = Collections.synchronizedMap((Map<EntryPoint,
EntryPointNode>) in.readObject());
ruleBase = ((DroolsObjectInputStream)in).getRuleBase();
super.readExternal( in );
}
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:841)
at java.util.HashMap$ValueIterator.next(HashMap.java:871)
at
org.drools.reteoo.ClassObjectTypeConf.getMatchingObjectTypes(ClassObjectTypeConf.java:171)
at
org.drools.reteoo.ClassObjectTypeConf.getObjectTypeNodes(ClassObjectTypeConf.java:163)
at
org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:143)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1066)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1022)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:810)
Please let me know the correct fix for this problem.
--
View this message in context: http://old.nabble.com/ConcurrentModificationException-at-org.drools.reteo...
Sent from the drools - user mailing list archive at Nabble.com.
16 years, 8 months
Java beans inheritance
by Zohar Etzioni
Hi,
I have a class hierarchy of objects that I'm inserting as facts. Lets
say X, Y extends X and Z extends Y. I have a rule that is defined on X
and therefore applies to all of them, however in the rule I want to
ask about the class name and I'm referring to it as
class.name=="some.class". This should work as far as I understand coz
it keeps the java beans format, however it is not directly defined in
the class X but rather in Object. The error I'm getting is "Error:
could not access: name". Any idea what I'm doing wrong?
Thanks,
Dawg
16 years, 8 months
Odd class loading issues (java.lang.NoClassDefFoundError wrong name) running JUnit test cases via Ant
by Weaver, Scott
Hi,
I am running into a strange classloader issue when running test cases in Ant. Outside of Ant, the test cases and application itself just run fine. It's only when I attempt to run the test case from within Ant that I get the error below:
Drools 5.0.1
Ant 1.6
JUnit 4.7
<testcase classname="com.siemens.pl.it.gre.rules.TestJUnit" name="testRule" time="1.75">
<error message="TestObject (wrong name: com/siemens/pl/it/gre/rules/TestObject)" type="java.lang.NoClassDefFoundError">java.lang.NoClassDefFoundError: TestObject (wrong name: com/siemens/pl/it/gre/rules/TestObject)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:242)
at org.drools.rule.CompositeClassLoader.loadClass(CompositeClassLoader.java:61)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.drools.base.ClassTypeResolver.resolveType(ClassTypeResolver.java:144)
at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:140)
at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:104)
at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:69)
at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:68)
at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1159)
at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:649)
at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:290)
at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:488)
at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:25)
at com.siemens.pl.it.gre.rules.AbstractRulesTestCase.createRuleBase(AbstractRulesTestCase.java:62)
at com.siemens.pl.it.gre.rules.TestJUnit.setUp(TestJUnit.java:21)
</error>
Ant snippet:
<target name="unitTest2">
<junit fork="yes">
<classpath>
<path refid="classpath" />
</classpath>
<formatter type="xml" />
<test name="com.siemens.pl.it.gre.rules.TestJUnit" haltonfailure="yes" outfile="${test.reports.dir}/results">
<formatter type="xml" />
</test>
</junit>
</target>
Turning the "fork" option off has no effect.
Example rule:
package com.siemens.pl.it.rules.test
import com.siemens.pl.it.gre.rules.TestObject;
rule "Is Value 'foo'?"
when
$testObj : TestObject( value == "foo" )
then
$testObj.setResult(true);
end
Interestingly, if I fully-qualify the class in LHS like this: com.siemens.pl.it.rules.test.TestObject( value == "foo" ), the test runs just fine though I would prefer not to have to do this in all my rules if at all possible.
Thanks,
-scott
16 years, 8 months
Fusion : Timebased rules fire only for the first time after the start of the application (tomcat)
by Chetan Mahadev
Hi
I am trying to correlate two or more events when a condition gets satisfied.
The rule is working fine only when i start my tomcat, and it fires only for
the first match of the events.
But subsequent events fails to correalte ( or rule doesnt fire). Am not sure
wats the issue.
Currently I am using the following config when i build my KnowledgeBase:
knowledgeBaseConfig = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
knowledgeBaseConfig.setOption( EventProcessingOption.STREAM );
kBase = KnowledgeBaseFactory.newKnowledgeBase( knowledgeBaseConfig
);
//kBase = newKbase();
kBase.addKnowledgePackages(knowledgeBuilder.getKnowledgePackages());
KnowledgeSessionConfiguration knowledgeSessionConfig =
KnowledgeBaseFactory.newKnowledgeSessionConfiguration();
((SessionConfiguration) knowledgeSessionConfig).setClockType(
ClockType.REALTIME_CLOCK );
Can anybody help here??
Regds
Chetan
16 years, 8 months
Reg: Writing complex rules in Grided editor
by bas karan
Hi,
I am new to Drools rules. Can any one of you tell me how can we write complex rules like below using Grided editor.
rule sequenceOfIncreasingWithdrawals
when
$account:Account($number : number)
$t1:TransactionCreatedEvent(fromAccountNumber == $number)
from entry-point TransactionStream
$t2:TransactionCreatedEvent(amount > $t1.amount,
fromAccountNumber == $number, this after[0, 3m] $t1)
from entry-point TransactionStream
not (TransactionCreatedEvent(fromAccountNumber == $number,
this after $t1, this before $t2 )
from entry-point TransactionStream)
$t3:TransactionCreatedEvent(amount > $t2.amount,
fromAccountNumber == $number, this after[0, 3m] $t2 )
from entry-point TransactionStream
not (TransactionCreatedEvent(fromAccountNumber == $number,
this after $t2, this before $t3 )
from entry-point TransactionStream)
$ai : AccountInfo(number == $number, eval($t1.amount.add(
$t2.amount).add($t3.amount).compareTo(BigDecimal.
valueOf(0.90).multiply(averageBalance)) > 0))
then
insert(new SuspiciousAccount($number,
SuspiciousAccountSeverity.MAJOR));
insert(new SuspiciousTransaction($t1.transactionUuid,
SuspiciousTransactionSeverity.MAJOR));
insert(new SuspiciousTransaction($t2.transactionUuid,
SuspiciousTransactionSeverity.MAJOR));
insert(new SuspiciousTransaction($t3.transactionUuid,
SuspiciousTransactionSeverity.MAJOR));
end
Thanks
Baskaran S
Yahoo! India has a new look. Take a sneak peek http://in.yahoo.com/trynew
16 years, 8 months
How to get parameter in a Human Task Handler specified while starting the process.
by Pardeep.Ruhil＠lntinfotech.com
Hi,
I have doubt regarding accessing parameter specified when we start a
workFlow proccess.
Like as we do while starting a process in Drools Flow.
ksession = JPAKnowledgeService.newStatefulKnowledgeSession( kbase, null,
env );
Map<String, Object> parameters = new HashMap<String, Object>();
parametes.put("objAppInfo",new AppInfo("Hello"));
WorkflowProcessInstance processInstance = (WorkflowProcessInstance)
ksession.startProcess("
DemoFlow",parameters);
Now I want to access this "objAppInfo" paramters in my Handler specified
for the HumanTask.
Please tell me the method. To retrieve the same.
Thanks & Regards
Pardeep Ruhil
______________________________________________________________________
16 years, 8 months
Guvnor Integration and Deployment
by Andrew Waterman
Hi All,
I've got a question about Guvnor integration into a build process.
I'm thinking that if I develop my rules within Guvnor; I can integrate
them into my unit testing part of my build process via a downloaded,
compiled package from Guvnor. My KnowledgeBase would be initialized
from this PKG file for local unit tests. Upon deployment of my
application to the server (an EAR file), I would then be able to use
two types of integration tests:
1. External integration tests for the full application that have
rules loaded from the Guvnor production server.
2. Guvnor scenario based tests.
So far, so good.
I have a few questions , though. I would like to put a reference to
the Guvnor WAR in my EAR file and have it simultaneously deployed with
my application. Of course, I would want to deploy my localized
package there as well, so I could use it at runtime.
Are there any suggestions on how to deploy an existing package into
Guvnor in a programmatic (maven-centric) fashion?
Is this the right approach to take for using Guvnor in a deployment
process?
Is there a way to remotely trigger Guvnor testing scenarios from the
build process?
best wishes,
Andrew
---------------------------------
Andrew Waterman
San Cristóbal de las Casas, Chiapas, Mexico
16 years, 8 months
