[rules-users] Drools Planner: Exception on createSolver method

Hi, I am new to Drools in general so please excuse my noobness with some of the concepts. I am in the process of creating a maintenance scheduling system. As Geoffrey suggested, I have based my application heavily on the curriculum course example included in the solver (planner) examples. I have created most of the classes used by the example and will be implementing my gui. I use an XmlSolverConfigurer to read the configuration from xml. The solver config xml path is correct as I get another exception due to the file not being found when I change the path. When the solver tries to load the xml configuration the following exception occurs: Exception in thread "AWT-EventQueue-0" com.thoughtworks.xstream.converters.ConversionException: environmentMode : environmentMode : environmentMode : environmentMode ---- Debugging information ---- message : environmentMode : environmentMode cause-exception : com.thoughtworks.xstream.mapper.CannotResolveClassException cause-message : environmentMode : environmentMode class : org.drools.solver.config.localsearch.LocalSearchSolverConfig required-type : org.drools.solver.config.localsearch.LocalSearchSolverConfig line number : 12 ------------------------------- at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:89) at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:63) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:76) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:60) at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:137) at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:33) at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:923) at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:909) at com.thoughtworks.xstream.XStream.fromXML(XStream.java:853) at org.drools.solver.config.XmlSolverConfigurer.configure(XmlSolverConfigurer.java:68) at org.drools.solver.config.XmlSolverConfigurer.configure(XmlSolverConfigurer.java:59) at org.drools.solver.config.XmlSolverConfigurer.configure(XmlSolverConfigurer.java:52) at za.co.rgems.projects.imms.swing.gui.ImmsGui.createSolver(ImmsGui.java:95) at za.co.rgems.projects.imms.swing.gui.ImmsGui.createSolutionBusiness(ImmsGui.java:103) at za.co.rgems.projects.imms.swing.gui.ImmsGui.btnSolveActionPerformed(ImmsGui.java:76) at za.co.rgems.projects.imms.swing.gui.ImmsGui.access$000(ImmsGui.java:23) at za.co.rgems.projects.imms.swing.gui.ImmsGui$1.actionPerformed(ImmsGui.java:50) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236) at java.awt.Component.processMouseEvent(Component.java:6263) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6028) at java.awt.Container.processEvent(Container.java:2041) at java.awt.Component.dispatchEventImpl(Component.java:4630) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168) at java.awt.Container.dispatchEventImpl(Container.java:2085) at java.awt.Window.dispatchEventImpl(Window.java:2475) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) Caused by: com.thoughtworks.xstream.mapper.CannotResolveClassException: environmentMode : environmentMode at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java:68) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.DynamicProxyMapper.realClass(DynamicProxyMapper.java:71) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.PackageAliasingMapper.realClass(PackageAliasingMapper.java:88) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.ClassAliasingMapper.realClass(ClassAliasingMapper.java:86) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.ArrayMapper.realClass(ArrayMapper.java:96) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:38) at com.thoughtworks.xstream.mapper.CachingMapper.realClass(CachingMapper.java:52) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.determineType(AbstractReflectionConverter.java:347) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:208) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:162) at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:82) ... 41 more Here is the contents of my XML configuration file: <?xml version="1.0" encoding="UTF-8"?> <localSearchSolver> <environmentMode>REPRODUCIBLE</environmentMode> <scoreDrl>/za/co/rgems/projects/imms/drl/immsRules.drl</scoreDrl> <scoreDefinition> <scoreDefinitionType>HARD_AND_SOFT</scoreDefinitionType> </scoreDefinition> <termination> <scoreAttained>0hard/-5000soft</scoreAttained> </termination> <startingSolutionInitializerClass>za.co.rgems.projects.imms.solution.initialiser.ImmsStartingSolutionInitialiser</startingSolutionInitializerClass> <finish> <maximumSecondsSpend>300</maximumSecondsSpend> </finish> <selector> <selector> <topSize>10</topSize> </selector> <selector> <moveFactoryClass>za.co.rgems.projects.imms.move.factory.MaintenanceSlotMoveFactory</moveFactoryClass> <relativeSelection>0.002</relativeSelection> </selector> <selector> <moveFactoryClass>za.co.rgems.projects.imms.move.factory.MaintenanceTaskSwitchFactory</moveFactoryClass> <relativeSelection>0.002</relativeSelection> </selector> <selector> <moveFactoryClass>za.co.rgems.projects.imms.move.factory.MaintenanceTechnicianChangeMoveFactory</moveFactoryClass> <relativeSelection>0.002</relativeSelection> </selector> <selector> <moveFactoryClass>za.co.rgems.projects.imms.move.factory.MotorChangeMoveFactory</moveFactoryClass> <relativeSelection>0.002</relativeSelection> </selector> </selector> <accepter> <completePropertyTabuSize>10</completePropertyTabuSize> <completeSolutionTabuSize>1500</completeSolutionTabuSize> </accepter> <forager> <foragerType>MAX_SCORE_OF_ALL</foragerType> </forager> </localSearchSolver> I am not sure why this occurs and I have also searched the forums/mailing list to no avail. I have been through the documentation on the configuration file as well as several of the example applications' config files, but fail to see what is the cause. Thank you in advance! Regards, De Ville Weppenaar -- View this message in context: http://n3.nabble.com/Drools-Planner-Exception-on-createSolver-method-tp71... Sent from the Drools - User mailing list archive at Nabble.com.