Re: [rules-users] ClassNotFound on class defined in drl with 5.5.0.CR1
by Willem van Asperen
Hi,
This was a good idea. Here is my test case:
public class TestCompilation {
private final static FileFilter RULES_FILES_FILTER = new FileFilter() {
@Override
public boolean accept(File pathname) {
return pathname.getName().endsWith(".drl");
}
};
private void testCompilation() throws FileNotFoundException,
IOException {
KnowledgeBuilderConfiguration configuration =
KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration();
KnowledgeBuilder kbuilder =
KnowledgeBuilderFactory.newKnowledgeBuilder(configuration);
File folder = new File("src/main/rules/");
for (File file : folder.listFiles(RULES_FILES_FILTER)) {
System.out.println("compiling "+file.getAbsolutePath());
kbuilder.add(ResourceFactory.newFileResource(file.getAbsolutePath()),
ResourceType.DRL);
}
System.out.println("saving");
ObjectOutputStream out = new ObjectOutputStream(new
FileOutputStream("test.drl.compiled"));
out.writeObject( kbuilder.getKnowledgePackages());
out.close();
}
private KnowledgeBase testLoad() throws FileNotFoundException,
IOException, ClassNotFoundException {
Properties configProperties = new Properties();
KnowledgeBaseConfiguration knowledgeBaseConfiguration =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration(configProperties);
KnowledgeBase kbase =
KnowledgeBaseFactory.newKnowledgeBase(knowledgeBaseConfiguration);
ObjectInputStream in = new ObjectInputStream(new
FileInputStream("test.drl.compiled"));
System.out.println("loading");
kbase.addKnowledgePackages((Collection<KnowledgePackage>) in.readObject());
return kbase;
}
public static void main(String[] args) throws
FileNotFoundException, IOException, ClassNotFoundException {
TestCompilation testCompilation = new TestCompilation();
testCompilation.testCompilation();
testCompilation.testLoad();
}
}
The folder src/main/rules consists of a number of .drl files.
Compiling works fine.
This is the output:
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for
further details.
compiling
/home/willem/development/workspace/VCM/src/main/rules/planner-lock.drl
compiling
/home/willem/development/workspace/VCM/src/main/rules/executable-action-selection.drl
compiling
/home/willem/development/workspace/VCM/src/main/rules/block-times-3.drl
compiling
/home/willem/development/workspace/VCM/src/main/rules/planner-bridge.drl
compiling
/home/willem/development/workspace/VCM/src/main/rules/routeplan.drl
compiling
/home/willem/development/workspace/VCM/src/main/rules/shift-management-brabant.drl
compiling
/home/willem/development/workspace/VCM/src/main/rules/plan-first-object-in-route.drl
compiling
/home/willem/development/workspace/VCM/src/main/rules/operator-lock.drl
compiling
/home/willem/development/workspace/VCM/src/main/rules/block-times-route-call.drl
compiling
/home/willem/development/workspace/VCM/src/main/rules/shift-management.drl
compiling
/home/willem/development/workspace/VCM/src/main/rules/planner-process-data.drl
compiling
/home/willem/development/workspace/VCM/src/main/rules/plan-last-moment.drl
compiling
/home/willem/development/workspace/VCM/src/main/rules/operator-bridge.drl
compiling
/home/willem/development/workspace/VCM/src/main/rules/operator-management.drl
saving
loading
Exception in thread "main" java.lang.ClassNotFoundException:
vcm.planner.lock.standard.PossibleSlotLock
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at
org.drools.common.DroolsObjectInputStream.resolveClass(DroolsObjectInputStream.java:85)
at
org.drools.common.DroolsObjectInputStream.resolveClass(DroolsObjectInputStream.java:97)
at
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1593)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1514)
at java.io.ObjectInputStream.readClass(ObjectInputStream.java:1480)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1330)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at
org.drools.rule.ConsequenceMetaData$Statement.readExternal(ConsequenceMetaData.java:61)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at java.util.ArrayList.readObject(ArrayList.java:733)
at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004)
at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at
org.drools.rule.ConsequenceMetaData.readExternal(ConsequenceMetaData.java:19)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at org.drools.rule.Rule.readExternal(Rule.java:207)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at
org.drools.rule.JavaDialectRuntimeData.readExternal(JavaDialectRuntimeData.java:195)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at java.util.HashMap.readObject(HashMap.java:1155)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004)
at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at
org.drools.rule.DialectRuntimeRegistry.readExternal(DialectRuntimeRegistry.java:58)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at org.drools.rule.Package.readExternal(Package.java:208)
at
org.drools.definitions.impl.KnowledgePackageImp.readExternal(KnowledgePackageImp.java:157)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at java.util.ArrayList.readObject(ArrayList.java:733)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004)
at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at
com.paconsulting.pase.test.TestCompilation.testLoad(TestCompilation.java:57)
at
com.paconsulting.pase.test.TestCompilation.main(TestCompilation.java:64)
The class PossibleSlotLock is just a locally declared fact class. It is
only being used in that particular .drl file. Every .drl file has it's
own package name.
The head of the .drl file:
package vcm.planner.lock.standard;
import java.util.Set;
import com.paconsulting.pase.core.schedule.CurrentTime;
import com.paconsulting.pase.core.duration.FixedDuration;
import com.paconsulting.pase.transport.agents.ScheduleManagingContainer;
import com.paconsulting.pase.transport.agents.movers.Ship;
import com.paconsulting.pase.transport.agents.water.Lock;
import com.paconsulting.pase.transport.agents.water.LockChamber;
import com.paconsulting.pase.transport.agents.base.WaterLevel;
import com.paconsulting.pase.transport.components.action.ActionFactory;
import com.paconsulting.pase.transport.actions.IAction;
import com.paconsulting.pase.transport.components.action.IActionable;
import com.paconsulting.pase.transport.actions.NonTransactionAction;
import com.paconsulting.pase.transport.actions.ExecutableAction;
import com.paconsulting.pase.transport.components.containing.IContainer;
import
com.paconsulting.pase.transport.components.containing.IContainer.UpDown;
import com.paconsulting.pase.transport.components.moving.IMover;
import com.paconsulting.pase.transport.components.moving.TransferSchedule;
import com.paconsulting.pase.transport.components.moving.ToScheduleLock;
declare PossibleSlotLock
ship : IMover
chamber : IContainer
side : IContainer.UpDown
schedule : TransferSchedule
eta : double
at : double
cause : String
end
....
Same issue like in my previous email, different class that cannot be found.
This works in 5.4.0.Final
Any clue?
This seems to me like a really basic thing so either I am missing the
plot somehow or no-one has yet used a locally declared fact classes -
which I think is just not true...
Regards,
Willem
On 10/24/2012 07:29 PM, Wolfgang Laun wrote:
> It would be interesting to know (and perhaps help to isolate the problem
> apparently introduced in 5.5.0) if you could try and compile and
> serialize into a single file, and load that in a single readObject.
>
> -W
>
> On 24/10/2012, Willem van Asperen <willem(a)van.asperen.org> wrote:
>> Hi Wolfgang,
>>
>> Thanks for picking this up. I am indeed compiling these separate .drl
>> files into separate .drl.compiled files and then creating a kbase using
>> addKnowledgePackages on the individual .drl.compiled files.
>>
>> But: the classes declared in some of by .drl files are only going to be
>> used in that particular .drl file - not anywhere else.
>> Also: this did work in 5.4.0.Final but now has given up on me.
>>
>> Point is that I need to be flexible in mixing different .drl.compiled
>> files into a kbase, based on user specifications.
>> Alternative is that I do not pre-compile these .drl files and only
>> compile them, in combination, in the mix that is required by the user...
>> If that would solve the problem... But it seems to be more cumbersome...
>>
>> Regards,
>> Willem
>>
>> On 10/24/2012 03:39 PM, Wolfgang Laun wrote:
>>> The code you use for loading where you load many .pkg files isn't
>>> quite the counterpart for compiling where you compile one DRL.
>>>
>>> Do you compile and output the .drl files one by one? Apparently you
>>> load them individually?
>>>
>>> Try compiling them all, and then take the Collection<KnowledgePackage>
>>> and writeObject it to a single .pkg from which you load them in one
>>> go.
>>>
>>> Could it be that the type declared in one .drl is used in another .drl
>>> in the same package? Reading this in the wrong order might cause the
>>> CNF.
>>>
>>> -W
>>>
>>> On 24/10/2012, Willem van Asperen <willem(a)van.asperen.org> wrote:
>>>> Dear All,
>>>>
>>>> I use the Drools compiler to compile a set of drl files:
>>>>
>>>>
>>>> KnowledgeBuilder kbuilder =
>>>> KnowledgeBuilderFactory.newKnowledgeBuilder(configuration);
>>>> kbuilder.add(ResourceFactory.newFileResource(fileName),
>>>> ResourceType.DRL);
>>>>
>>>> KnowledgeBuilderErrors errors = kbuilder.getErrors();
>>>> if (errors.size() > 0) {
>>>> for (KnowledgeBuilderError error: errors) {
>>>> logger.error(error);
>>>> }
>>>> throw new IllegalArgumentException("Could not parse
>>>> knowledge.");
>>>> }
>>>>
>>>> ObjectOutputStream out = new ObjectOutputStream(new
>>>> FileOutputStream(fileName+".compiled"));
>>>> out.writeObject( kbuilder.getKnowledgePackages());
>>>> out.close();
>>>>
>>>> I then load these *.compiled files into my application:
>>>>
>>>>
>>>> for (String packageName : packages) {
>>>> InputStream is =
>>>> getClass().getResourceAsStream("/"+packageName+".drl.compiled");
>>>> if (is != null) {
>>>> logger.debug("adding package '"+packageName+"'");
>>>> ObjectInputStream in = new ObjectInputStream(is);
>>>> kbase.addKnowledgePackages((Collection<KnowledgePackage>)
>>>> in.readObject());
>>>> in.close();
>>>> } else
>>>> throw new FileNotFoundException("could not find
>>>> resource for package "+packageName);
>>>> is.close();
>>>> }
>>>>
>>>> In some of these drl files I declare a class, for instance:
>>>>
>>>> package vcm.selection.standard;
>>>>
>>>> import com.paconsulting.pase.transport.agents.ShiftWorker;
>>>> import com.paconsulting.pase.transport.agents.VCMShiftWorker;
>>>> import com.paconsulting.pase.transport.actions.ExecutableAction;
>>>> import com.paconsulting.pase.transport.agents.ScheduleManagingContainer;
>>>> import com.paconsulting.pase.transport.agents.water.Bridge;
>>>> import com.paconsulting.pase.transport.agents.movers.AbstractMover;
>>>> import com.paconsulting.pase.transport.agents.movers.Ship;
>>>> import com.paconsulting.pase.transport.agents.movers.VCMShip;
>>>>
>>>> declare RelevantExecutableAction
>>>> agent : ShiftWorker
>>>> executableAction : ExecutableAction
>>>> end
>>>> ...
>>>>
>>>> When running the
>>>> kbase.addKnowledgePackages((Collection<KnowledgePackage>)
>>>> in.readObject()) I get the following ClassNotFound stack trace:
>>>>
>>>> java.lang.ClassNotFoundException:
>>>> vcm.selection.standard.RelevantExecutableAction
>>>> at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
>>>> at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
>>>> at java.security.AccessController.doPrivileged(Native Method)
>>>> at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
>>>> at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
>>>> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
>>>> at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
>>>> at java.lang.Class.forName0(Native Method)
>>>> at java.lang.Class.forName(Class.java:264)
>>>> at
>>>> org.drools.common.DroolsObjectInputStream.resolveClass(DroolsObjectInputStream.java:85)
>>>> at
>>>> org.drools.common.DroolsObjectInputStream.resolveClass(DroolsObjectInputStream.java:97)
>>>> at
>>>> java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1593)
>>>> at
>>>> java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1514)
>>>> at
>>>> java.io.ObjectInputStream.readClass(ObjectInputStream.java:1480)
>>>> at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1330)
>>>> at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
>>>> at
>>>> org.drools.rule.ConsequenceMetaData$Statement.readExternal(ConsequenceMetaData.java:61)
>>>> at
>>>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
>>>> at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
>>>> at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
>>>> at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
>>>> at java.util.ArrayList.readObject(ArrayList.java:733)
>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>> at
>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>>>> at
>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>>> at java.lang.reflect.Method.invoke(Method.java:601)
>>>> at
>>>> java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004)
>>>> at
>>>> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866)
>>>> at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
>>>> at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
>>>> at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
>>>> at
>>>> org.drools.rule.ConsequenceMetaData.readExternal(ConsequenceMetaData.java:19)
>>>> at
>>>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
>>>> at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
>>>> at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
>>>> at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
>>>> at org.drools.rule.Rule.readExternal(Rule.java:207)
>>>> at
>>>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
>>>> at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
>>>> at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
>>>> at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
>>>> at
>>>> org.drools.rule.JavaDialectRuntimeData.readExternal(JavaDialectRuntimeData.java:195)
>>>> at
>>>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
>>>> at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
>>>> at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
>>>> at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
>>>> at java.util.HashMap.readObject(HashMap.java:1155)
>>>> at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
>>>> at
>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>>> at java.lang.reflect.Method.invoke(Method.java:601)
>>>> at
>>>> java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004)
>>>> at
>>>> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866)
>>>> at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
>>>> at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
>>>> at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
>>>> at
>>>> org.drools.rule.DialectRuntimeRegistry.readExternal(DialectRuntimeRegistry.java:58)
>>>> at
>>>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
>>>> at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
>>>> at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
>>>> at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
>>>> at org.drools.rule.Package.readExternal(Package.java:208)
>>>> at
>>>> org.drools.definitions.impl.KnowledgePackageImp.readExternal(KnowledgePackageImp.java:157)
>>>> at
>>>> java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
>>>> at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
>>>> at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
>>>> at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
>>>> at java.util.ArrayList.readObject(ArrayList.java:733)
>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>> at
>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>>>> at
>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>>> at java.lang.reflect.Method.invoke(Method.java:601)
>>>> at
>>>> java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004)
>>>> at
>>>> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866)
>>>> at
>>>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
>>>> at
>>>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
>>>> at
>>>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
>>>> at
>>>> com.paconsulting.pase.core.configuration.runconfig.definition.KnowledgebaseDefinition.addPackages(KnowledgebaseDefinition.java:48)
>>>> at
>>>> com.paconsulting.pase.core.configuration.runconfig.definition.KnowledgebaseDefinition.materialize(KnowledgebaseDefinition.java:59)
>>>> at
>>>> com.paconsulting.pase.core.configuration.runconfig.definition.TeamDefinition.materialize(TeamDefinition.java:97)
>>>> at
>>>> com.paconsulting.pase.core.configuration.runconfig.definition.OperatingModelDefinition.materialize(OperatingModelDefinition.java:36)
>>>> at
>>>> com.paconsulting.pase.core.configuration.runconfig.Run.<init>(Run.java:31)
>>>> at
>>>> com.paconsulting.pase.core.configuration.runconfig.definition.RunDefinition.materialize(RunDefinition.java:53)
>>>> at
>>>> com.paconsulting.pase.core.configuration.runconfig.RunConfigExecutor$ScheduleExecutorWrapper.run(RunConfigExecutor.java:69)
>>>> ...
>>>>
>>>> I'm sure I miss something as this is basic functionality. Maybe I must
>>>> tell the kbase where to load the classes...
>>>>
>>>> Can someone point me in the right direction?
>>>>
>>>> Thanks,
>>>> Willem
>>>>
>>>> _______________________________________________
>>>> rules-users mailing list
>>>> rules-users(a)lists.jboss.org
>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>>
>>> _______________________________________________
>>> rules-users mailing list
>>> rules-users(a)lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
13 years, 2 months
ClassCastException
by Ejaz Mohammed
Hello,
I'm getting class cast exception when I execute same rules with same fact
for more than 4 times.
If I catch the exception and reload the knowledge base from serialized
file, the problem is fixed.
However, I'm interested in root cause of the issue
Any advice?
Regards
Ejaz
13 years, 2 months
ClassNotFound on class defined in drl with 5.5.0.CR1
by Willem van Asperen
Dear All,
I use the Drools compiler to compile a set of drl files:
KnowledgeBuilder kbuilder =
KnowledgeBuilderFactory.newKnowledgeBuilder(configuration);
kbuilder.add(ResourceFactory.newFileResource(fileName),
ResourceType.DRL);
KnowledgeBuilderErrors errors = kbuilder.getErrors();
if (errors.size() > 0) {
for (KnowledgeBuilderError error: errors) {
logger.error(error);
}
throw new IllegalArgumentException("Could not parse
knowledge.");
}
ObjectOutputStream out = new ObjectOutputStream(new
FileOutputStream(fileName+".compiled"));
out.writeObject( kbuilder.getKnowledgePackages());
out.close();
I then load these *.compiled files into my application:
for (String packageName : packages) {
InputStream is =
getClass().getResourceAsStream("/"+packageName+".drl.compiled");
if (is != null) {
logger.debug("adding package '"+packageName+"'");
ObjectInputStream in = new ObjectInputStream(is);
kbase.addKnowledgePackages((Collection<KnowledgePackage>) in.readObject());
in.close();
} else
throw new FileNotFoundException("could not find
resource for package "+packageName);
is.close();
}
In some of these drl files I declare a class, for instance:
package vcm.selection.standard;
import com.paconsulting.pase.transport.agents.ShiftWorker;
import com.paconsulting.pase.transport.agents.VCMShiftWorker;
import com.paconsulting.pase.transport.actions.ExecutableAction;
import com.paconsulting.pase.transport.agents.ScheduleManagingContainer;
import com.paconsulting.pase.transport.agents.water.Bridge;
import com.paconsulting.pase.transport.agents.movers.AbstractMover;
import com.paconsulting.pase.transport.agents.movers.Ship;
import com.paconsulting.pase.transport.agents.movers.VCMShip;
declare RelevantExecutableAction
agent : ShiftWorker
executableAction : ExecutableAction
end
...
When running the
kbase.addKnowledgePackages((Collection<KnowledgePackage>)
in.readObject()) I get the following ClassNotFound stack trace:
java.lang.ClassNotFoundException:
vcm.selection.standard.RelevantExecutableAction
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at
org.drools.common.DroolsObjectInputStream.resolveClass(DroolsObjectInputStream.java:85)
at
org.drools.common.DroolsObjectInputStream.resolveClass(DroolsObjectInputStream.java:97)
at
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1593)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1514)
at java.io.ObjectInputStream.readClass(ObjectInputStream.java:1480)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1330)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at
org.drools.rule.ConsequenceMetaData$Statement.readExternal(ConsequenceMetaData.java:61)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at java.util.ArrayList.readObject(ArrayList.java:733)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004)
at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at
org.drools.rule.ConsequenceMetaData.readExternal(ConsequenceMetaData.java:19)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at org.drools.rule.Rule.readExternal(Rule.java:207)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at
org.drools.rule.JavaDialectRuntimeData.readExternal(JavaDialectRuntimeData.java:195)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at java.util.HashMap.readObject(HashMap.java:1155)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004)
at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at
org.drools.rule.DialectRuntimeRegistry.readExternal(DialectRuntimeRegistry.java:58)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at org.drools.rule.Package.readExternal(Package.java:208)
at
org.drools.definitions.impl.KnowledgePackageImp.readExternal(KnowledgePackageImp.java:157)
at
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at java.util.ArrayList.readObject(ArrayList.java:733)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004)
at
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at
com.paconsulting.pase.core.configuration.runconfig.definition.KnowledgebaseDefinition.addPackages(KnowledgebaseDefinition.java:48)
at
com.paconsulting.pase.core.configuration.runconfig.definition.KnowledgebaseDefinition.materialize(KnowledgebaseDefinition.java:59)
at
com.paconsulting.pase.core.configuration.runconfig.definition.TeamDefinition.materialize(TeamDefinition.java:97)
at
com.paconsulting.pase.core.configuration.runconfig.definition.OperatingModelDefinition.materialize(OperatingModelDefinition.java:36)
at
com.paconsulting.pase.core.configuration.runconfig.Run.<init>(Run.java:31)
at
com.paconsulting.pase.core.configuration.runconfig.definition.RunDefinition.materialize(RunDefinition.java:53)
at
com.paconsulting.pase.core.configuration.runconfig.RunConfigExecutor$ScheduleExecutorWrapper.run(RunConfigExecutor.java:69)
...
I'm sure I miss something as this is basic functionality. Maybe I must
tell the kbase where to load the classes...
Can someone point me in the right direction?
Thanks,
Willem
13 years, 2 months
Starting with Drools and EMF
by ordoabchao
Hi! i´m starting with Drools and EMF, so i decided to do a simple Drools
example and a simple EMF example.I tested it for separate and all worked
fine, so I tried to integrate both things. I added the path of the Drools
example to the EMF´s, but when I try to run i receive this message error:
Problems occurred when invoking code from plug-in: "org.eclipse.jface".
java.lang.NoClassDefFoundError: com/sample/Adapter
at Libreria.impl.clienteImpl.setNombre(clienteImpl.java:106)
at Libreria.impl.clienteImpl.eSet(clienteImpl.java:152)
at
org.eclipse.emf.ecore.impl.BasicEObjectImpl.eSet(BasicEObjectImpl.java:1071)
at
org.eclipse.gmf.runtime.emf.type.core.commands.SetValueCommand.doExecuteWithResult(SetValueCommand.java:74)
......
I don´t know what I´m doing wrong and I can´t find any example or practical
documentation to learn how to do Drools/EMF integration fine.
Could any one help me? salutes and thanks for all
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13 years, 2 months
can't start jboss with enable=true option for resource-change-scanner
by eselis
Hello,
I have an application that use Guvnor 5.4.0 final as a process repository,
processes are designed with Orix (v2.3.0), both are running in a
JBOSS-EAPv6.
In addition I have another app which consumes processes from Guvnor. I want
that my app gets the new processes without restarting the container (another
Jboos-EAPv6).
I found that the solution should be to add this to my configuration xml
/<drools:resource-change-scanner id="scanner" interval="10" enabled="true"
/> /
I added it, but when I want to startup my app, I have the following mistake
related to the line wrote above.
/nested exception is org.xml.sax.SAXParseException; lineNumber: 18;
columnNumber: 77; cvc-complex-type.3.2.2: Attribute 'enabled' is not allowed
to appear in element 'drools:resource-change-scanner'/
I tried to use without the option enable="true" but I didn't get the new
processes unless I restart jboss. Does anybody have any idea to help me?
Thanks in advance,
--
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13 years, 2 months
