Are the classes you import in your DRL available on the classpath at runtime?<br><br><div class="gmail_quote">On 24 October 2012 11:10, Willem van Asperen <span dir="ltr"><<a href="mailto:willem@van.asperen.org" target="_blank">willem@van.asperen.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear All,<br>
<br>
I use the Drools compiler to compile a set of drl files:<br>
<br>
<br>
KnowledgeBuilder kbuilder =<br>
KnowledgeBuilderFactory.newKnowledgeBuilder(configuration);<br>
kbuilder.add(ResourceFactory.newFileResource(fileName),<br>
ResourceType.DRL);<br>
<br>
KnowledgeBuilderErrors errors = kbuilder.getErrors();<br>
if (errors.size() > 0) {<br>
for (KnowledgeBuilderError error: errors) {<br>
logger.error(error);<br>
}<br>
throw new IllegalArgumentException("Could not parse<br>
knowledge.");<br>
}<br>
<br>
ObjectOutputStream out = new ObjectOutputStream(new<br>
FileOutputStream(fileName+".compiled"));<br>
out.writeObject( kbuilder.getKnowledgePackages());<br>
out.close();<br>
<br>
I then load these *.compiled files into my application:<br>
<br>
<br>
for (String packageName : packages) {<br>
InputStream is =<br>
getClass().getResourceAsStream("/"+packageName+".drl.compiled");<br>
if (is != null) {<br>
logger.debug("adding package '"+packageName+"'");<br>
ObjectInputStream in = new ObjectInputStream(is);<br>
kbase.addKnowledgePackages((Collection<KnowledgePackage>) in.readObject());<br>
in.close();<br>
} else<br>
throw new FileNotFoundException("could not find<br>
resource for package "+packageName);<br>
is.close();<br>
}<br>
<br>
In some of these drl files I declare a class, for instance:<br>
<br>
package vcm.selection.standard;<br>
<br>
import com.paconsulting.pase.transport.agents.ShiftWorker;<br>
import com.paconsulting.pase.transport.agents.VCMShiftWorker;<br>
import com.paconsulting.pase.transport.actions.ExecutableAction;<br>
import com.paconsulting.pase.transport.agents.ScheduleManagingContainer;<br>
import com.paconsulting.pase.transport.agents.water.Bridge;<br>
import com.paconsulting.pase.transport.agents.movers.AbstractMover;<br>
import com.paconsulting.pase.transport.agents.movers.Ship;<br>
import com.paconsulting.pase.transport.agents.movers.VCMShip;<br>
<br>
declare RelevantExecutableAction<br>
agent : ShiftWorker<br>
executableAction : ExecutableAction<br>
end<br>
...<br>
<br>
When running the<br>
kbase.addKnowledgePackages((Collection<KnowledgePackage>)<br>
in.readObject()) I get the following ClassNotFound stack trace:<br>
<br>
java.lang.ClassNotFoundException:<br>
vcm.selection.standard.RelevantExecutableAction<br>
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)<br>
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)<br>
at java.security.AccessController.doPrivileged(Native Method)<br>
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)<br>
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)<br>
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)<br>
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)<br>
at java.lang.Class.forName0(Native Method)<br>
at java.lang.Class.forName(Class.java:264)<br>
at<br>
org.drools.common.DroolsObjectInputStream.resolveClass(DroolsObjectInputStream.java:85)<br>
at<br>
org.drools.common.DroolsObjectInputStream.resolveClass(DroolsObjectInputStream.java:97)<br>
at<br>
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1593)<br>
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1514)<br>
at java.io.ObjectInputStream.readClass(ObjectInputStream.java:1480)<br>
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1330)<br>
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)<br>
at<br>
org.drools.rule.ConsequenceMetaData$Statement.readExternal(ConsequenceMetaData.java:61)<br>
at<br>
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)<br>
at<br>
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)<br>
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)<br>
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)<br>
at java.util.ArrayList.readObject(ArrayList.java:733)<br>
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)<br>
at<br>
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)<br>
at<br>
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)<br>
at java.lang.reflect.Method.invoke(Method.java:601)<br>
at<br>
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004)<br>
at<br>
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866)<br>
at<br>
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)<br>
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)<br>
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)<br>
at<br>
org.drools.rule.ConsequenceMetaData.readExternal(ConsequenceMetaData.java:19)<br>
at<br>
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)<br>
at<br>
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)<br>
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)<br>
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)<br>
at org.drools.rule.Rule.readExternal(Rule.java:207)<br>
at<br>
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)<br>
at<br>
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)<br>
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)<br>
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)<br>
at<br>
org.drools.rule.JavaDialectRuntimeData.readExternal(JavaDialectRuntimeData.java:195)<br>
at<br>
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)<br>
at<br>
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)<br>
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)<br>
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)<br>
at java.util.HashMap.readObject(HashMap.java:1155)<br>
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)<br>
at<br>
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)<br>
at java.lang.reflect.Method.invoke(Method.java:601)<br>
at<br>
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004)<br>
at<br>
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866)<br>
at<br>
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)<br>
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)<br>
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)<br>
at<br>
org.drools.rule.DialectRuntimeRegistry.readExternal(DialectRuntimeRegistry.java:58)<br>
at<br>
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)<br>
at<br>
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)<br>
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)<br>
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)<br>
at org.drools.rule.Package.readExternal(Package.java:208)<br>
at<br>
org.drools.definitions.impl.KnowledgePackageImp.readExternal(KnowledgePackageImp.java:157)<br>
at<br>
java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1810)<br>
at<br>
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)<br>
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)<br>
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)<br>
at java.util.ArrayList.readObject(ArrayList.java:733)<br>
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)<br>
at<br>
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)<br>
at<br>
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)<br>
at java.lang.reflect.Method.invoke(Method.java:601)<br>
at<br>
java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1004)<br>
at<br>
java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866)<br>
at<br>
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)<br>
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)<br>
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)<br>
at<br>
com.paconsulting.pase.core.configuration.runconfig.definition.KnowledgebaseDefinition.addPackages(KnowledgebaseDefinition.java:48)<br>
at<br>
com.paconsulting.pase.core.configuration.runconfig.definition.KnowledgebaseDefinition.materialize(KnowledgebaseDefinition.java:59)<br>
at<br>
com.paconsulting.pase.core.configuration.runconfig.definition.TeamDefinition.materialize(TeamDefinition.java:97)<br>
at<br>
com.paconsulting.pase.core.configuration.runconfig.definition.OperatingModelDefinition.materialize(OperatingModelDefinition.java:36)<br>
at<br>
com.paconsulting.pase.core.configuration.runconfig.Run.<init>(Run.java:31)<br>
at<br>
com.paconsulting.pase.core.configuration.runconfig.definition.RunDefinition.materialize(RunDefinition.java:53)<br>
at<br>
com.paconsulting.pase.core.configuration.runconfig.RunConfigExecutor$ScheduleExecutorWrapper.run(RunConfigExecutor.java:69)<br>
...<br>
<br>
I'm sure I miss something as this is basic functionality. Maybe I must<br>
tell the kbase where to load the classes...<br>
<br>
Can someone point me in the right direction?<br>
<br>
Thanks,<br>
Willem<br>
<br>
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</blockquote></div><br>