Drools 5.4.0.FINAL and OSGI. Unable to instantiate service for Class 'org.drools.concurrent.ExecutorProvider'
by Per Sterner
Hello,
I have been using Drools 5.3.0.FINAL until now. I am upgrading my
running system with 5.4.0.FINAL. The bundles are all runing. I got some
error messages and tried to reduce the problem and created a simple bundle.
The code only inserts facts and after 20 facts I get the following error:
[ERROR] [System] - Exception in thread "Thread-8"
java.lang.ExceptionInInitializerError
[ERROR] [System] - at
org.drools.concurrent.ExecutorProviderFactory.getExecutorProvider(ExecutorProviderFactory.java:12)
[ERROR] [System] - at
org.drools.rule.constraint.MvelConstraint$ExecutorHolder.<clinit>(MvelConstraint.java:208)
[ERROR] [System] - at
org.drools.rule.constraint.MvelConstraint.jitEvaluator(MvelConstraint.java:199)
[ERROR] [System] - at
org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:164)
[ERROR] [System] - at
org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:124)
[ERROR] [System] - at
org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137)
[ERROR] [System] - at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)
[ERROR] [System] - at
org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)
[ERROR] [System] - at
org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)
[ERROR] [System] - at
org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:337)
[ERROR] [System] - at
org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:298)
[ERROR] [System] - at
org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:123)
[ERROR] [System] - at
org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:53)
[ERROR] [System] - at
de.pelle7.drools.test1.simpletest.SimpleTestDrools$1.run(SimpleTestDrools.java:74)
[ERROR] [System] - Caused by: java.lang.IllegalArgumentException: Unable
to instantiate service for Class 'org.drools.concurrent.ExecutorProvider'
[ERROR] [System] - at
org.drools.util.ServiceRegistryImpl.get(ServiceRegistryImpl.java:162)
[ERROR] [System] - at
org.drools.concurrent.ExecutorProviderFactory$ExecutorProviderHolder.<clinit>(ExecutorProviderFactory.java:8)
[ERROR] [System] - ... 14 more
[ERROR] [System] - Caused by: java.lang.IllegalArgumentException: Unable
to instantiate 'org.drools.concurrent.ExecutorProviderImpl'
[ERROR] [System] - at
org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.newInstance(ServiceRegistryImpl.java:213)
[ERROR] [System] - at
org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.call(ServiceRegistryImpl.java:205)
[ERROR] [System] - at
org.drools.util.ServiceRegistryImpl.get(ServiceRegistryImpl.java:160)
[ERROR] [System] - ... 15 more
[ERROR] [System] - Caused by: java.lang.ClassNotFoundException:
org.drools.concurrent.ExecutorProviderImpl
[ERROR] [System] - at
org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:506)
[ERROR] [System] - at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:422)
[ERROR] [System] - at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410)
[ERROR] [System] - at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
[ERROR] [System] - at java.lang.ClassLoader.loadClass(Unknown Source)
[ERROR] [System] - at java.lang.Class.forName0(Native Method)
[ERROR] [System] - at java.lang.Class.forName(Unknown Source)
[ERROR] [System] - at
org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.newInstance(ServiceRegistryImpl.java:210)
[ERROR] [System] - ... 17 more
The Rule file:
package de.pelle7.drools.test1.users.rules.impl;
import de.pelle7.drools.test1.simpletest.*;
import org.jbpm.ruleflow.instance.*;
rule "Funny Rule #1"
dialect "java"
when
$testObject : TestObjectA( value == 0 ) from entry-point "my_entry"
then
System.err.println("New Item: " + $testObject);
retract($testObject);
end
If I change the line
--> $testObject : TestObjectA( value == 0 ) from entry-point "my_entry"
to
--> $testObject : TestObjectA( ) from entry-point "my_entry"
there is no problem.
In the java code i initialize a Drools Session programatically and add
one rule file:
package de.pelle7.drools.test1.simpletest;
import java.io.InputStream;
import java.net.URI;
import java.net.URL;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseConfiguration;
import org.drools.KnowledgeBaseFactoryService;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderConfiguration;
import org.drools.builder.KnowledgeBuilderFactoryService;
import org.drools.builder.ResourceType;
import org.drools.definition.KnowledgePackage;
import org.drools.io.ResourceFactory;
import org.drools.io.ResourceFactoryService;
import org.drools.runtime.StatefulKnowledgeSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class SimpleTestDrools {
public static final String DEFAULT_ENTRY = "my_entry";
private static Logger logger =
LoggerFactory.getLogger(SimpleTestDrools.class);
private StatefulKnowledgeSession droolsSession;
private KnowledgeBuilderFactoryService
droolsKnowledgeBuilderFactoryService;
private ResourceFactoryService droolsResourceFactoryService;
private KnowledgeBaseFactoryService droolsKnowledgeBaseFactoryService;
public static Logger getLogger() {
return logger;
}
public StatefulKnowledgeSession getDroolsSession() {
return droolsSession;
}
public void start() {
KnowledgeBuilder kbuilder =
getDroolsKnowledgeBuilderFactoryService().newKnowledgeBuilder();
KnowledgeBaseConfiguration config =
getDroolsKnowledgeBaseFactoryService().newKnowledgeBaseConfiguration();
//config.setOption( MBeansOption.ENABLED );
KnowledgeBase knowledgeBase =
getDroolsKnowledgeBaseFactoryService().newKnowledgeBase(config);
droolsSession = knowledgeBase.newStatefulKnowledgeSession();
LinkedList<URI> resourcesList = new LinkedList<URI>();
try {
resourcesList.add(
getClass().getResource("MyDrools.drl").toURI() );
addResources(droolsSession,
getDroolsKnowledgeBuilderFactoryService(),
resourcesList);
} catch (Exception e) {
e.printStackTrace();
}
new Thread() {
public void run() {
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
}
System.out.println("Go 1");
for (int i = 0; i< 1000; i++) {
System.out.println(i);
getDroolsSession().getWorkingMemoryEntryPoint(DEFAULT_ENTRY).insert(new
TestObjectA());
getDroolsSession().fireAllRules();
try {
Thread.sleep(1);
} catch (InterruptedException e) {
}
}
System.out.println("Go 2");
};
}.start();
System.err.println("wait");
//getDroolsSession().fireUntilHalt();
}
public static void addResources(
StatefulKnowledgeSession droolsSession,
KnowledgeBuilderFactoryService
droolsKnowledgeBuilderFactoryService,
List<URI> resources
) throws MyDroolsException {
getLogger().debug("Drools: Register: " + resources);
MyDroolsException exception = null;
KnowledgeBuilderConfiguration lnowledgeBuilderConfiguration =
droolsKnowledgeBuilderFactoryService.newKnowledgeBuilderConfiguration();
HashSet<URI> defects = new HashSet<URI>();
KnowledgeBuilder kbuilder = null;
while (true) {
URI uriError = null;
kbuilder =
droolsKnowledgeBuilderFactoryService.newKnowledgeBuilder(lnowledgeBuilderConfiguration);
try {
Iterator<URI> it = resources.iterator();
while (it.hasNext()) {
URI uri = (URI) it.next();
if (defects.contains(uri)) {
continue;
}
StringBuilder builder = new StringBuilder();
builder.append("Adding drools file '" +
uri.toString() + "'");
URL url = uri.toURL();
InputStream iStream = url.openStream();
ResourceType resourceType;
String path = uri.getPath().toLowerCase();
resourceType =
ResourceType.determineResourceType(path);
getLogger().debug(builder.toString());
kbuilder.add(ResourceFactory.newInputStreamResource(iStream), resourceType);
// Check the builder for errors
if (kbuilder.hasErrors()) {
uriError = uri;
//getLogger().error(kbuilder.getErrors().toString());
String errorMessage =
kbuilder.getErrors().toString();
kbuilder.getErrors().clear();
throw new MyDroolsException(errorMessage);
}
try {
iStream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
} catch (Throwable e) {
if (uriError != null) {
defects.add(uriError);
}
String msg = "Error in Resource '" + uriError + "'";
getLogger().error(msg);
e.printStackTrace();
if (exception != null) {
exception = new MyDroolsException(msg, exception);
} else {
exception = new MyDroolsException(msg);
}
exception = new MyDroolsException(e.getMessage(),
exception);
continue;
}
// All done!
break;
}
final Collection<KnowledgePackage> pkgs =
kbuilder.getKnowledgePackages();
droolsSession.getKnowledgeBase().addKnowledgePackages(pkgs);
if (exception != null) {
throw new MyDroolsException("Error while adding
resources!", exception);
}
}
public KnowledgeBuilderFactoryService
getDroolsKnowledgeBuilderFactoryService() {
return droolsKnowledgeBuilderFactoryService;
}
public void setDroolsKnowledgeBuilderFactoryService(
KnowledgeBuilderFactoryService
droolsKnowledgeBuilderFactoryService) {
this.droolsKnowledgeBuilderFactoryService =
droolsKnowledgeBuilderFactoryService;
}
public ResourceFactoryService getDroolsResourceFactoryService() {
return droolsResourceFactoryService;
}
public void setDroolsResourceFactoryService(
ResourceFactoryService droolsResourceFactoryService) {
this.droolsResourceFactoryService = droolsResourceFactoryService;
}
public KnowledgeBaseFactoryService
getDroolsKnowledgeBaseFactoryService() {
return droolsKnowledgeBaseFactoryService;
}
public void setDroolsKnowledgeBaseFactoryService(
KnowledgeBaseFactoryService
droolsKnowledgeBaseFactoryService) {
this.droolsKnowledgeBaseFactoryService =
droolsKnowledgeBaseFactoryService;
}
}
Some of the bundles in my runtime are:
39 ACTIVE org.drools.core_5.4.0.Final
66 ACTIVE org.drools.compiler_5.4.0.Final
78 ACTIVE org.drools.templates_5.4.0.Final
94 ACTIVE org.drools.internalapi_5.4.0.Final
136 ACTIVE org.drools.decisiontables_5.4.0.Final
189 ACTIVE org.drools.api_5.4.0.Final
191 ACTIVE org.mvel2_2.1.0.drools16
6 ACTIVE org.jbpm.flow.core_5.3.0.Final
13 ACTIVE org.jbpm.bpmn2_5.3.0.Final
71 ACTIVE org.jbpm.flow.builder_5.3.0.Final
142 ACTIVE org.jbpm.flow-persistence-jpa_5.3.0.FINAL
regards,
Per Sterner
11 years, 11 months
Change Scanner does not start
by Antonio Anderson Souza
Dear All,
I have an application that use Guvnor 5.4.0 final as the rules repository
and a DroolsServer 5.4.0 final (with Spring Camel) to provide rule engine
via a Rest Webservices, all of those apps Running in a JBossAS 7.1.
All of the service are working perfectly, except the
resource-change-scanner that is configured in the knowledge-services.xml
[1] as it's described in the documentation.
When Drools-Server are deployed the Change Scanner does not start (I'm
monitoring the change scanner via Wireshark analyzing the communication
between DroolServer and Guvnor), I've created an small JSP file [2] that
invoke the ChangeScanner start method, when i run the JSP the Change
Scanner start to work (i can see the http requests from Drools Server do
Guvnor to see if the knowledge base had changed), but after Change Scanner
started working the rules are not triggered anymore.
So without Change Scanner I've all of the knowledge service running
properly, but the App is unable to detect rules changes, when I explicitly
(via JSP) start the Change Scanner all of the knowledge service stopped
working.
Change Scanner starts automatically?
Does anybody has some idea to help me?
[1] ------------------------------------------------------------------------
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:drools="http://drools.org/schema/drools-spring"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://drools.org/schema/drools-spring
http://drools.org/schema/drools-spring-1.3.0.xsd">
<drools:grid-node id="node1"/>
<drools:resource-change-scanner id="scanner" interval="10" />
<drools:kbase id="kbase1" node="node1" />
<drools:kagent id="kagent1" kbase="kbase1">
<drools:resources>
<drools:resource type="CHANGE_SET" source="classpath:ChangeSet.xml" />
</drools:resources>
</drools:kagent>
<drools:ksession id="ksession1" type="stateless" kbase="kbase1"
node="node1"/>
</beans>
[2] ------------------------------------------------------------------------
<%@ page language="java" contentType="text/html; charset=utf-8" %>
<%
org.drools.io.ResourceChangeScannerConfiguration sconf =
org.drools.io.ResourceFactory.getResourceChangeScannerService().newResourceChangeScannerConfiguration();
sconf.setProperty("drools.resource.scanner.interval", "5");
org.drools.io.ResourceFactory.getResourceChangeScannerService().configure(sconf);
org.drools.io.ResourceFactory.getResourceChangeScannerService().start();
org.drools.io.ResourceFactory.getResourceChangeNotifierService().start();
%>
Best Regards,
Antonio Anderson Souza
<http://174.129.217.139:8080/makecallclient/callme?p=YXNvdXphQHZvaWNlLmJyY...>
Blog <http://www.antonioams.com> - Twitter <http://twitter.com/antonioams>-
LinkedIn <http://br.linkedin.com/in/antonioams> -
Facebook<http://www.facebook.com/antonioams>
11 years, 11 months
Drools: Using Declared Types in Decision Tables
by David Smith
Hi,
I am trying to use a declared type in a decision table
but get an "Unable to resolve ObjectType" message.
The declared type is in a file types.drl,
I have a spreadsheet test.xls that has a Ruleset with
an import line for the declared type.
Is it possible to reference a declared type from a decision table?
Is it possible to declare a type in a decision table?
Thanks
David
11 years, 11 months
Complicated Issue
by abhinay_agarwal
hey,
M using guvnor 5.3.0 Final version and two instances of guvnor.
In my first guvnor application, i ve two packages containg all my rules
which i am accessing using drools core and knowledge api v5.2.0 Final .I use
type "DRL" to extract rules from my change set.
In my second guvnor application, i just have a package which contains my
JBPM process. Here, i am using drools 5.3.1 Final jars to connect and make
my kbase. i use type = "PKG" in my chnage set, which is contradictory to
JIRA <https://issues.jboss.org/browse/JBRULES-3388> is opened that a PKG
cannot be read, but was working fine for my application.
Now i dont want to deploy two different wars of guvnor and was expecting to
do it by deploying just 1 guvnor.
So instead of taking the headache of using different jars, i used a neutral
GUVNOR and drools 5.4.0 final version. I deployed the guvnor, imported the
old repository, built the packages and tried firing the rules using type =
"DRL" in my change set. Everything Worked fine.
As soon as i changed my type = "PKG" in my change set to access the rules, i
got an error :
java.lang.UnsupportedClassVersionError:
Institutional/CalculateDateDifference : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at
org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:615)
at
org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254)
at
org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237)
at
org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at
org.drools.rule.MVELDialectRuntimeData.getParserConfiguration(MVELDialectRuntimeData.java:270)
at
org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:203)
at org.drools.base.mvel.MVELConsequence.compile(MVELConsequence.java:75)
at
org.drools.rule.MVELDialectRuntimeData.onBeforeExecute(MVELDialectRuntimeData.java:173)
at
org.drools.rule.DialectRuntimeRegistry.onBeforeExecute(DialectRuntimeRegistry.java:144)
at
org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:599)
at org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:472)
at
org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:150)
at
org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1085)
at
org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:824)
at
org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:673)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:203)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:182)
at
com.infy.fcs.drools.adapter.DroolsGuvnorTest.readKnowledgeBase(DroolsGuvnorTest.java:196)
at
com.infy.fcs.drools.adapter.DroolsGuvnorTest.main(DroolsGuvnorTest.java:107)
When i tried to access the process package(Which is a diff package and
contains only a process), i got the following error
java.lang.UnsupportedClassVersionError:
Fatca_Process/Process_Fatca_Process_Fatca_integration_queue_f06d3a378a5f49d5b7589aae2c0b686eReturnValueEvaluator7Invoker
: Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at
org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:615)
at
org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254)
at
org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237)
at
org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at
org.drools.rule.JavaDialectRuntimeData.wire(JavaDialectRuntimeData.java:435)
at
org.drools.rule.JavaDialectRuntimeData.wire(JavaDialectRuntimeData.java:430)
at
org.drools.rule.JavaDialectRuntimeData.onBeforeExecute(JavaDialectRuntimeData.java:256)
at
org.drools.rule.DialectRuntimeRegistry.onBeforeExecute(DialectRuntimeRegistry.java:138)
at
org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:599)
at org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:472)
at
org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:150)
at
org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1085)
at
org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:824)
at
org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:673)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:203)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:182)
at
com.infy.fcs.drools.adapter.DroolsGuvnorTest.readKnowledgeBase(DroolsGuvnorTest.java:196)
at
com.infy.fcs.drools.adapter.DroolsGuvnorTest.main(DroolsGuvnorTest.java:107)
here is the attached changeset that i am using
changeset_process.xml
<http://drools.46999.n3.nabble.com/file/n4020175/changeset_process.xml>
ChangeSet_rules.xml
<http://drools.46999.n3.nabble.com/file/n4020175/ChangeSet_rules.xml>
please lemme know, if wat i am trying to achieve is evne possible or not?
If yes, then where am i going wrong ?
--
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12 years
Drools 5.4 Jitting Error
by gboro54
I just updated to Drools 5.4 and I am not getting the following error on all
my map accessors:
10:41:12,997 ERROR [stderr] (Thread-169) Exception in thread "Thread-169"
java.lang.RuntimeException: Exception jitting: feeKeys[1] == null
10:41:12,998 ERROR [stderr] (Thread-169) at
org.drools.rule.constraint.MvelConstraint.executeJitting(MvelConstraint.java:219)
10:41:12,999 ERROR [stderr] (Thread-169) at
org.drools.rule.constraint.MvelConstraint.access$000(MvelConstraint.java:41)
10:41:13,000 ERROR [stderr] (Thread-169) at
org.drools.rule.constraint.MvelConstraint$1.run(MvelConstraint.java:201)
10:41:13,000 ERROR [stderr] (Thread-169) at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
10:41:13,001 ERROR [stderr] (Thread-169) at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
10:41:13,002 ERROR [stderr] (Thread-169) at
java.lang.Thread.run(Thread.java:662)
10:41:13,002 ERROR [stderr] (Thread-169) Caused by: java.lang.VerifyError:
(class: ConditionEvaluator51817e9f4a7542c5b295be7d674f854c, method: evaluate
signature:
(Ljava/lang/Object;Lorg/drools/common/InternalWorkingMemory;Lorg/drools/reteoo/LeftTuple;)Z)
Expecting to find object/array on stack
10:41:13,004 ERROR [stderr] (Thread-169) at
java.lang.Class.getDeclaredConstructors0(Native Method)
10:41:13,004 ERROR [stderr] (Thread-169) at
java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
10:41:13,005 ERROR [stderr] (Thread-169) at
java.lang.Class.getConstructor0(Class.java:2699)
10:41:13,005 ERROR [stderr] (Thread-169) at
java.lang.Class.getConstructor(Class.java:1657)
10:41:13,006 ERROR [stderr] (Thread-169) at
org.drools.rule.builder.dialect.asm.ClassGenerator.newInstance(ClassGenerator.java:173)
10:41:13,006 ERROR [stderr] (Thread-169) at
org.drools.rule.constraint.ASMConditionEvaluatorJitter.jitEvaluator(ASMConditionEvaluatorJitter.java:53)
10:41:13,007 ERROR [stderr] (Thread-169) at
org.drools.rule.constraint.MvelConstraint.executeJitting(MvelConstraint.java:217)
10:41:13,008 ERROR [stderr] (Thread-169) ... 5 more
Could anyone indicate how to fix this?
--
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12 years
Rules with variable timers
by Shannon Hastings
Is there a way to write a rule in DRL that uses a timer or something that is dynamic. I.E. I want the time that rule waits to fire to be dependent on a variable such as below:
rule "CheckDoseMissed"
no-loop
timer(int: $eventA.sleepTime)
when
$eventA : MyEvent()
………..
----------
Shannon Hastings
Inventrio
shannon.hastings(a)inventrio.com
(614) 389-2795 ext: 101
http://www.inventrio.com
12 years
Droold 5.4.0
by hare ram
Hi All,
I am newbie to Drools. I just downloaded drools-distribution-5.4.0.Final.
If I look at the binaries directory.
there are lots of jar files in it. I want to know what the minimum set of
jars i need to include in my classpath
to compile and run simple drl file.
Thanks
12 years
Re: [rules-users] Planner:5.5.0beta1 chained with 2 planningvariables difficulties
by ge0ffrey
Paul T wrote
> Exception in thread "main" java.lang.IllegalArgumentException: The
> valueSelectorConfig (ValueSelectorConfig(null)) has no configured
> planningVariableName (null) for planningEntityClass (class
> com.domain.Orders) and because there are multiple in the
> planningVariableNameSet ([previousTaskOrEquip, standTime]), it can not be
> deducted automatically.
You'll need to specify the planningVariableName, see the
curriculumCourseSolverConfig.xml for an example how to do that.
This is because there are 2 planning variables, it's independent of whether
or not some of them are chained.
--
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12 years, 1 month
java.lang.LinkageError, but only sometimes
by kennywest
Dear list,
We have an application (A) deployed on JBoss 7.1.1 accepting commands (CQRS,
but only C and Q :) ). A console application (B) is sending a large volume
of commands to create entities in A. Entities in A are validated by Drools
(plain drl files, configured in spring using drools-spring). Most of the
time this works just fine. But sometimes, we get the following exception:
java.lang.LinkageError: loader (instance of
org/drools/rule/JavaDialectRuntimeData$PackageClassLoader): attempted
duplicate class definition for name:
"a/b/c/Rule_person_unique___name_656ee3db19d34e689d95e2d6b2be67b6"
at java.lang.ClassLoader.defineClass1(Native Method) [rt.jar:1.6.0_30]
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
[rt.jar:1.6.0_30]
at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
[rt.jar:1.6.0_30]
at
org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:615)
[drools-core-5.4.0.Final.jar:5.4.0.Final]
at
org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254)
[knowledge-api-5.4.0.Final.jar:5.4.0.Final]
at
org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237)
[knowledge-api-5.4.0.Final.jar:5.4.0.Final]
at
org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88)
[knowledge-api-5.4.0.Final.jar:5.4.0.Final]
at java.lang.ClassLoader.loadClass(ClassLoader.java:295) [rt.jar:1.6.0_30]
at java.lang.ClassLoader.loadClass(ClassLoader.java:247) [rt.jar:1.6.0_30]
at
a.b.c.Rule_gg___unique___name_656ee3db19d34e689d95e2d6b2be67b6Eval0InvokerGenerated.evaluate(Unknown
Source)
at
a.b.c.Rule_gg___unique___name_656ee3db19d34e689d95e2d6b2be67b6Eval0Invoker.evaluate(Unknown
Source)
at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:114)
[drools-core-5.4.0.Final.jar:5.4.0.Final]
Any idea where this is coming from or what's causing this.
We are using:
- JBoss 7.1.1
- drools 5.4.0.Final
- jdk 1.6u30
- Windows 7 64 bit
regards,
Kenneth
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