this is the full drl file: ------------ package com.swa.planner.domain.rule; import org.drools.planner.core.score.buildin.hardandsoft.HardAndSoftScoreHolder; import org.drools.planner.core.score.constraint.IntConstraintOccurrence; import org.drools.planner.core.score.constraint.ConstraintType; import com.swa.planner.domain.CloudBalance; import com.swa.planner.domain.CloudComputer; import com.swa.planner.domain.CloudProcess; global HardAndSoftScoreHolder scoreHolder; rule "requiredCpuPowerTotal" when $computer : CloudComputer($cpuPower : cpuPower) $requiredCpuPowerTotal : Number(intValue > $cpuPower) from accumulate( CloudProcess ( computer == $computer, $requiredCpuPower : requiredCpuPower), sum($requiredCpuPower) ) then insertLogical(new IntConstraintOccurrence("requiredCpuPowerTotal", ConstraintType.NEGATIVE_HARD, $requiredCpuPowerTotal.intValue() - $cpuPower, $computer)); end rule "requiredMemoryTotal" when $computer : CloudComputer($memory : memory) $requiredMemoryTotal : Number(intValue > $memory) from accumulate( CloudProcess ( computer == $computer, $requiredMemory : requiredMemory), sum($requiredMemory) ) then insertLogical(new IntConstraintOccurrence("requiredMemoryTotal", ConstraintType.NEGATIVE_HARD, $requiredMemoryTotal.intValue() - $memory, $computer)); end rule "requiredNetworkBandwidth" when $computer : CloudComputer($networkBandwidth : networkBandwidth) $requiredNetworkBandwidthTotal : Number(intValue > $networkBandwidth) from accumulate( CloudProcess ( computer == $computer, $requiredNetworkBandwidth : requiredNetworkBandwidth) sum($requiredNetworkBandwidth) ) then insertLogical(new IntConstraintOccurrence("requiredNetworkBandwidth", ConstraintType.NEGATIVE_HARD, $requiredNetworkBandwidthTotal.intValue() - $networkBandwidth, $computer)); end rule "hardConstraintBroken" salience -1 when $hardTotal : Number() from accumulate( IntConstraintOccurrence(constraintType == ConstraintType.NEGATIVE_HARD, $weight : weight) sum($weight) ) then scoreHolder.setHardConstraintsBroken($hardTotal.intValue()); end // Soft constraint rule "computerCost" when $computer : CloudComputer($cost : cost) exists CloudProcess(computer == $computer) then insertLogical(new IntConstraintOccurrence("computerCost", ConstraintType.NEGATIVE_SOFT, $cost, $computer)); end rule "softConstraintBroken" salience -1 when $softTotal : Number() from accumulate( IntConstraintOccurrence(ConstraintType == ConstraintType.NEGATIVE_SOFT, $weight : weight) sum($weight) ) then scoreHolder.setHardConstraintsBroken($softTotal.intValue()); end 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com&gt; > com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.defaultConsequence(Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.java:14) > > What's in the then side of Rule_requiredCpuPowerTotal ? > > Op 28-01-13 16:00, André Fróes schreef: > > Even adding that, the error still > > -------------- > 12:57:41.050 [main] INFO o.d.p.core.solver.DefaultSolver - Solving > started: time spend (152), score (null), new best score (null), random seed > (0). > Exception in thread "main" Exception executing consequence for rule > "requiredCpuPowerTotal" in com.swa.planner.domain.rule: > java.lang.NullPointerException > at > org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) > at > org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297) > at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221) > at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456) > at > org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710) > at > org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674) > at > org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177) > at > org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92) > at > org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120) > at > org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136) > at > org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110) > at > org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82) > at > org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65) > at > org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) > at > org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) > at com.swa.planner.domain.CloudTest.main(CloudTest.java:67) > Caused by: java.lang.NullPointerException > at java.lang.String.<init>(Unknown Source) > at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) > at > org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302) > at > org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) > at org.mvel2.MVEL.compileExpression(MVEL.java:810) > at > org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435) > at > org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238) > at > org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206) > at > org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190) > at > org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157) > at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) > at > org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497) > at > org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382) > at > org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235) > at > org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240) > at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350) > at > org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38) > at > org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204) > at > org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176) > at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231) > at > org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903) > at > org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245) > at > org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210) > at > org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205) > at > com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.defaultConsequence(Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.java:14) > at > com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvokerGenerated.evaluate(Unknown > Source) > at > com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvoker.evaluate(Unknown > Source) > at > org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287) > ... 14 more > > -------------- > > I added to cloudprocess computer variable: > -------------- > package com.swa.planner.domain; > > import org.drools.planner.api.domain.entity.PlanningEntity; > import org.drools.planner.api.domain.variable.PlanningVariable; > import org.drools.planner.api.domain.variable.ValueRange; > import org.drools.planner.api.domain.variable.ValueRangeType; > import org.drools.planner.examples.common.domain.AbstractPersistable; > > @PlanningEntity(difficultyComparatorClass = > CloudProcessDifficultyComparator.class) > public class CloudProcess extends AbstractPersistable{ > > private int requiredCpuPower; > private int requiredMemory; > private int requiredNetworkBandwidth; > > private CloudComputer computer; > > public CloudProcess(long id, int requiredCpuPower, int requiredMemory, > int requiredNetworkBandwidth) { > super(); > setId(id); > this.requiredCpuPower = requiredCpuPower; > this.requiredMemory = requiredMemory; > this.requiredNetworkBandwidth = requiredNetworkBandwidth; > } > public CloudProcess() { } > > public int getRequiredCpuPower() { > return requiredCpuPower; > } > > public void setRequiredCpuPower(int requiredCpuPower) { > this.requiredCpuPower = requiredCpuPower; > } > > public int getRequiredMemory() { > return requiredMemory; > } > > public void setRequiredMemory(int requiredMemory) { > this.requiredMemory = requiredMemory; > } > > public int getRequiredNetworkBandwidth() { > return requiredNetworkBandwidth; > } > > public void setRequiredNetworkBandwidth(int requiredNetworkBandwidth) { > this.requiredNetworkBandwidth = requiredNetworkBandwidth; > } > > public String getLabel() { > return "Process " + id; > } > @PlanningVariable(strengthComparatorClass = > CloudComputerStrengthComparator.class) > @ValueRange(type = ValueRangeType.FROM_SOLUTION_PROPERTY, > solutionProperty = "computerList") > public CloudComputer getComputer() { > if (computer == null) { return null; } > return computer; > } > > public void setComputer(CloudComputer computer) { > this.computer = computer; > } > public CloudProcess clone(){ > CloudProcess clone = new CloudProcess(); > clone.id = id; > clone.requiredCpuPower = requiredCpuPower; > clone.requiredMemory = requiredMemory; > clone.requiredNetworkBandwidth = requiredNetworkBandwidth; > clone.computer = computer; > return clone; > } > public int getRequiredMultiplicand() { > return requiredCpuPower * requiredMemory * > requiredNetworkBandwidth; > } > } > -------------- > > this is what i'm doing to run the example: > > ------------- > package com.swa.planner.domain; > > import java.io.ByteArrayInputStream; > import java.util.ArrayList; > import java.util.List; > > import org.drools.planner.config.SolverFactory; > import org.drools.planner.config.XmlSolverFactory; > import org.drools.planner.core.Solver; > > public class CloudTest { > public static void main(String[] args) { > String t = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" > + "<solver>" > + " <solutionClass>com.swa.planner.domain.CloudBalance</solutionClass>" > + " > <planningEntityClass>com.swa.planner.domain.CloudProcess</planningEntityClass>" > + " <scoreDirectorFactory>" > + " <scoreDefinitionType>HARD_AND_SOFT</scoreDefinitionType>" > + " > <scoreDrl>/com/swa/planner/domain/rule/cloudBalancingScoreRules.drl</scoreDrl>" > + " </scoreDirectorFactory>" > + " <termination>" > + " <maximumSecondsSpend>120</maximumSecondsSpend>" > + " </termination>" > + " <constructionHeuristic>" > + " > <constructionHeuristicType>FIRST_FIT_DECREASING</constructionHeuristicType>" > + " > <constructionHeuristicPickEarlyType>FIRST_LAST_STEP_SCORE_EQUAL_OR_IMPROVING</constructionHeuristicPickEarlyType>" > + " </constructionHeuristic>" > + " <localSearch>" > + " <acceptor>" > + " <planningEntityTabuSize>7</planningEntityTabuSize>" > + " </acceptor>" > + " <forager>" > + " <minimalAcceptedSelection>1000</minimalAcceptedSelection>" > + " </forager>" > + " </localSearch>" > + "</solver>"; > > byte b[] = t.getBytes(); > ByteArrayInputStream bt = new ByteArrayInputStream(b); > SolverFactory solverFactory = new XmlSolverFactory().configure(bt); > Solver solver = solverFactory.buildSolver(); > > List<CloudComputer> computerList = new ArrayList<CloudComputer>(); > computerList.add(new CloudComputer(1L, "Computador 1", 3, 2, 2, 110)); > computerList.add(new CloudComputer(2L, "Computador 2", 12, 8, 3, 400)); > computerList.add(new CloudComputer(3L, "Computador 3", 6, 6, 4, 300)); > computerList.add(new CloudComputer(4L, "Computador 4", 18, 12, 8, > 1000)); > computerList.add(new CloudComputer(5L, "Computador 5", 8, 4, 6, 800)); > computerList.add(new CloudComputer(6L, "Computador 6", 9, 7, 9, 1000)); > > List<CloudProcess> processList = new ArrayList<CloudProcess>(); > processList.add(new CloudProcess(11L, 2, 2, 2)); > processList.add(new CloudProcess(12L, 4, 4, 2)); > processList.add(new CloudProcess(13L, 1, 1, 3)); > processList.add(new CloudProcess(14L, 7, 3, 5)); > processList.add(new CloudProcess(15L, 5, 8, 3)); > processList.add(new CloudProcess(16L, 9, 2, 2)); > processList.add(new CloudProcess(17L, 6, 5, 6)); > > CloudBalance cloudBalance = new CloudBalance(); > cloudBalance.setId(0L); > cloudBalance.setComputerList(computerList); > cloudBalance.setProcessList(processList); > > // Solve the problem > solver.setPlanningProblem(cloudBalance); > solver.solve(); > CloudBalance solvedCloudBalance = (CloudBalance) > solver.getBestSolution(); > > // Display the result > System.out.println("\nSolved cloudBalance with 5 computers and 6 > processes:\n" > + toDisplayString(solvedCloudBalance)); > } > > public static String toDisplayString(CloudBalance cloudBalance) { > StringBuilder displayString = new StringBuilder(); > for (CloudProcess process : cloudBalance.getProcessList()) { > CloudComputer computer = process.getComputer(); > displayString.append(" ").append(process.getLabel()) > .append(" -> ") > .append(computer == null ? null : computer.getLabel()) > .append("\n"); > } > return displayString.toString(); > } > } > > ------------- > > > 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com&gt; > >> The value of a variable of an entity starts out as null during >> construction heuristics, even if it's not nullable. >> >> The usual trick is to add null safe getters: >> >> public class BedDesignation { >> >> // bed is planning variable >> ... >> public Departement getDepartment() { >> if (bed == null) { return null;} >> return bed.getRoom().getDepartement() >> } >> } >> >> >> Op 28-01-13 15:13, André Fróes schreef: >> >> I've implemented it to see how it would work, now I got another error: >> >> --------------- >> >> 12:10:41.357 [main] INFO o.d.p.core.solver.DefaultSolver - Solving >> started: time spend (302), score (null), new best score (null), random seed >> (0). >> Exception in thread "main" Exception executing consequence for rule >> "requiredCpuPowerTotal" in com.swa.planner.domain.rule: >> java.lang.NullPointerException >> at >> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) >> at >> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297) >> at >> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221) >> at >> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456) >> at >> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710) >> at >> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674) >> at >> org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177) >> at >> org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92) >> at >> org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120) >> at >> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136) >> at >> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110) >> at >> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82) >> at >> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65) >> at >> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) >> at >> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) >> at com.swa.planner.domain.CloudTest.main(CloudTest.java:65) >> Caused by: java.lang.NullPointerException >> at java.lang.String.<init>(Unknown Source) >> at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) >> at >> org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302) >> at >> org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) >> at org.mvel2.MVEL.compileExpression(MVEL.java:810) >> at >> org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435) >> at >> org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238) >> at >> org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206) >> at >> org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190) >> at >> org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157) >> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) >> at >> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497) >> at >> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382) >> at >> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235) >> at >> org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240) >> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350) >> at >> org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38) >> at >> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204) >> at >> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176) >> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231) >> at >> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903) >> at >> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245) >> at >> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210) >> at >> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205) >> at >> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bd.defaultConsequence(Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bd.java:14) >> at >> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bdDefaultConsequenceInvokerGenerated.evaluate(Unknown >> Source) >> at >> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bdDefaultConsequenceInvoker.evaluate(Unknown >> Source) >> at >> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287) >> ... 14 more >> >> ----------------- >> >> this one i have no clue >> >> >> 2013/1/28 André Fróes <arfmoraes(a)gmail.com&gt; >> >>> Hello there, i'm getting this error: >>> >>> ------------------- >>> 11:26:50.394 [main] INFO o.d.p.core.solver.DefaultSolver - Solving >>> started: time spend (187), score (null), new best score (null), random seed >>> (0). >>> Exception in thread "main" java.lang.IllegalStateException: The >>> selectionOrder (DECREASING_DIFFICULTY) can not be used on a PlanningEntity >>> (com.swa.planner.domain.CloudProcess) that has no support for difficulty >>> sorting. Check the @PlanningEntity annotation. >>> at >>> org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.validate(PlanningEntitySelector.java:53) >>> at >>> org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.phaseStarted(PlanningEntitySelector.java:45) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.selector.GreedyPlanningEntitySelector.phaseStarted(GreedyPlanningEntitySelector.java:41) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.phaseStarted(DefaultGreedyFitSolverPhase.java:111) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:57) >>> at >>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) >>> at >>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) >>> at com.swa.planner.domain.CloudTest.main(CloudTest.java:51) >>> ------------------------- >>> >>> I know why it is happening though (at least i think so), but will I >>> have to implement the comparator to every planner I do or is there any >>> other way to make it work? >>> >>> I'm reproducing the example from the guide, when it passes the drools >>> rules it gives that message. I didn't implement >>> CloudComputerStrengthComparator neither CloudProcessDifficultyComparator, >>> will I have to implement those so this example works? >>> >> >> >> >> _______________________________________________ >> rules-users mailing listrules-users@lists.jboss.orghttps://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 >> >> > > > _______________________________________________ > rules-users mailing listrules-users@lists.jboss.orghttps://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 > >

Which version of planner (drools-planner-core) and drools (drools-core, drools-compiler)? Op 28-01-13 16:40, André Fróes schreef: I'm comparing both the example and my implementation, can't see anything different from each other except that example uses that CloudBalancingGenerator. Even the drl rule remains the same, i wrote it and then fixed the errors until reach that point. 2013/1/28 André Fróes <arfmoraes(a)gmail.com&gt; > this is the full drl file: > > ------------ > > package com.swa.planner.domain.rule; > > import > org.drools.planner.core.score.buildin.hardandsoft.HardAndSoftScoreHolder; > import org.drools.planner.core.score.constraint.IntConstraintOccurrence; > import org.drools.planner.core.score.constraint.ConstraintType; > > import com.swa.planner.domain.CloudBalance; > import com.swa.planner.domain.CloudComputer; > import com.swa.planner.domain.CloudProcess; > > global HardAndSoftScoreHolder scoreHolder; > > rule "requiredCpuPowerTotal" > when > $computer : CloudComputer($cpuPower : cpuPower) > $requiredCpuPowerTotal : Number(intValue > $cpuPower) from accumulate( > CloudProcess ( > computer == $computer, > $requiredCpuPower : requiredCpuPower), > sum($requiredCpuPower) > ) > then > insertLogical(new IntConstraintOccurrence("requiredCpuPowerTotal", > ConstraintType.NEGATIVE_HARD, > $requiredCpuPowerTotal.intValue() - $cpuPower, > $computer)); > end > > rule "requiredMemoryTotal" > when > $computer : CloudComputer($memory : memory) > $requiredMemoryTotal : Number(intValue > $memory) from accumulate( > CloudProcess ( > computer == $computer, > $requiredMemory : requiredMemory), > sum($requiredMemory) > ) > then > insertLogical(new IntConstraintOccurrence("requiredMemoryTotal", > ConstraintType.NEGATIVE_HARD, > $requiredMemoryTotal.intValue() - $memory, > $computer)); > end > > rule "requiredNetworkBandwidth" > when > $computer : CloudComputer($networkBandwidth : networkBandwidth) > $requiredNetworkBandwidthTotal : Number(intValue > $networkBandwidth) > from accumulate( > CloudProcess ( > computer == $computer, > $requiredNetworkBandwidth : requiredNetworkBandwidth) > sum($requiredNetworkBandwidth) > ) > then > insertLogical(new IntConstraintOccurrence("requiredNetworkBandwidth", > ConstraintType.NEGATIVE_HARD, > $requiredNetworkBandwidthTotal.intValue() - $networkBandwidth, > $computer)); > end > > rule "hardConstraintBroken" > salience -1 > when > $hardTotal : Number() from accumulate( > IntConstraintOccurrence(constraintType == ConstraintType.NEGATIVE_HARD, > $weight : weight) > sum($weight) > ) > then > scoreHolder.setHardConstraintsBroken($hardTotal.intValue()); > end > > > // Soft constraint > > rule "computerCost" > when > $computer : CloudComputer($cost : cost) > exists CloudProcess(computer == $computer) > then > insertLogical(new IntConstraintOccurrence("computerCost", > ConstraintType.NEGATIVE_SOFT, > $cost, > $computer)); > end > > rule "softConstraintBroken" > salience -1 > when > $softTotal : Number() from accumulate( > IntConstraintOccurrence(ConstraintType == ConstraintType.NEGATIVE_SOFT, > $weight : weight) > sum($weight) > ) > then > scoreHolder.setHardConstraintsBroken($softTotal.intValue()); > end > > > 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com&gt; > >> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.defaultConsequence(Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.java:14) >> >> What's in the then side of Rule_requiredCpuPowerTotal ? >> >> Op 28-01-13 16:00, André Fróes schreef: >> >> Even adding that, the error still >> >> -------------- >> 12:57:41.050 [main] INFO o.d.p.core.solver.DefaultSolver - Solving >> started: time spend (152), score (null), new best score (null), random seed >> (0). >> Exception in thread "main" Exception executing consequence for rule >> "requiredCpuPowerTotal" in com.swa.planner.domain.rule: >> java.lang.NullPointerException >> at >> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) >> at >> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297) >> at >> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221) >> at >> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456) >> at >> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710) >> at >> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674) >> at >> org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177) >> at >> org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92) >> at >> org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120) >> at >> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136) >> at >> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110) >> at >> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82) >> at >> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65) >> at >> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) >> at >> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) >> at com.swa.planner.domain.CloudTest.main(CloudTest.java:67) >> Caused by: java.lang.NullPointerException >> at java.lang.String.<init>(Unknown Source) >> at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) >> at >> org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302) >> at >> org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) >> at org.mvel2.MVEL.compileExpression(MVEL.java:810) >> at >> org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435) >> at >> org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238) >> at >> org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206) >> at >> org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190) >> at >> org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157) >> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) >> at >> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497) >> at >> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382) >> at >> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235) >> at >> org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240) >> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350) >> at >> org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38) >> at >> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204) >> at >> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176) >> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231) >> at >> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903) >> at >> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245) >> at >> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210) >> at >> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205) >> at >> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.defaultConsequence(Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.java:14) >> at >> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvokerGenerated.evaluate(Unknown >> Source) >> at >> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvoker.evaluate(Unknown >> Source) >> at >> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287) >> ... 14 more >> >> -------------- >> >> I added to cloudprocess computer variable: >> -------------- >> package com.swa.planner.domain; >> >> import org.drools.planner.api.domain.entity.PlanningEntity; >> import org.drools.planner.api.domain.variable.PlanningVariable; >> import org.drools.planner.api.domain.variable.ValueRange; >> import org.drools.planner.api.domain.variable.ValueRangeType; >> import org.drools.planner.examples.common.domain.AbstractPersistable; >> >> @PlanningEntity(difficultyComparatorClass = >> CloudProcessDifficultyComparator.class) >> public class CloudProcess extends AbstractPersistable{ >> >> private int requiredCpuPower; >> private int requiredMemory; >> private int requiredNetworkBandwidth; >> >> private CloudComputer computer; >> >> public CloudProcess(long id, int requiredCpuPower, int requiredMemory, >> int requiredNetworkBandwidth) { >> super(); >> setId(id); >> this.requiredCpuPower = requiredCpuPower; >> this.requiredMemory = requiredMemory; >> this.requiredNetworkBandwidth = requiredNetworkBandwidth; >> } >> public CloudProcess() { } >> >> public int getRequiredCpuPower() { >> return requiredCpuPower; >> } >> >> public void setRequiredCpuPower(int requiredCpuPower) { >> this.requiredCpuPower = requiredCpuPower; >> } >> >> public int getRequiredMemory() { >> return requiredMemory; >> } >> >> public void setRequiredMemory(int requiredMemory) { >> this.requiredMemory = requiredMemory; >> } >> >> public int getRequiredNetworkBandwidth() { >> return requiredNetworkBandwidth; >> } >> >> public void setRequiredNetworkBandwidth(int requiredNetworkBandwidth) { >> this.requiredNetworkBandwidth = requiredNetworkBandwidth; >> } >> >> public String getLabel() { >> return "Process " + id; >> } >> @PlanningVariable(strengthComparatorClass = >> CloudComputerStrengthComparator.class) >> @ValueRange(type = ValueRangeType.FROM_SOLUTION_PROPERTY, >> solutionProperty = "computerList") >> public CloudComputer getComputer() { >> if (computer == null) { return null; } >> return computer; >> } >> >> public void setComputer(CloudComputer computer) { >> this.computer = computer; >> } >> public CloudProcess clone(){ >> CloudProcess clone = new CloudProcess(); >> clone.id = id; >> clone.requiredCpuPower = requiredCpuPower; >> clone.requiredMemory = requiredMemory; >> clone.requiredNetworkBandwidth = requiredNetworkBandwidth; >> clone.computer = computer; >> return clone; >> } >> public int getRequiredMultiplicand() { >> return requiredCpuPower * requiredMemory * >> requiredNetworkBandwidth; >> } >> } >> -------------- >> >> this is what i'm doing to run the example: >> >> ------------- >> package com.swa.planner.domain; >> >> import java.io.ByteArrayInputStream; >> import java.util.ArrayList; >> import java.util.List; >> >> import org.drools.planner.config.SolverFactory; >> import org.drools.planner.config.XmlSolverFactory; >> import org.drools.planner.core.Solver; >> >> public class CloudTest { >> public static void main(String[] args) { >> String t = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" >> + "<solver>" >> + " >> <solutionClass>com.swa.planner.domain.CloudBalance</solutionClass>" >> + " >> <planningEntityClass>com.swa.planner.domain.CloudProcess</planningEntityClass>" >> + " <scoreDirectorFactory>" >> + " <scoreDefinitionType>HARD_AND_SOFT</scoreDefinitionType>" >> + " >> <scoreDrl>/com/swa/planner/domain/rule/cloudBalancingScoreRules.drl</scoreDrl>" >> + " </scoreDirectorFactory>" >> + " <termination>" >> + " <maximumSecondsSpend>120</maximumSecondsSpend>" >> + " </termination>" >> + " <constructionHeuristic>" >> + " >> <constructionHeuristicType>FIRST_FIT_DECREASING</constructionHeuristicType>" >> + " >> <constructionHeuristicPickEarlyType>FIRST_LAST_STEP_SCORE_EQUAL_OR_IMPROVING</constructionHeuristicPickEarlyType>" >> + " </constructionHeuristic>" >> + " <localSearch>" >> + " <acceptor>" >> + " <planningEntityTabuSize>7</planningEntityTabuSize>" >> + " </acceptor>" >> + " <forager>" >> + " <minimalAcceptedSelection>1000</minimalAcceptedSelection>" >> + " </forager>" >> + " </localSearch>" >> + "</solver>"; >> >> byte b[] = t.getBytes(); >> ByteArrayInputStream bt = new ByteArrayInputStream(b); >> SolverFactory solverFactory = new XmlSolverFactory().configure(bt); >> Solver solver = solverFactory.buildSolver(); >> >> List<CloudComputer> computerList = new ArrayList<CloudComputer>(); >> computerList.add(new CloudComputer(1L, "Computador 1", 3, 2, 2, 110)); >> computerList.add(new CloudComputer(2L, "Computador 2", 12, 8, 3, 400)); >> computerList.add(new CloudComputer(3L, "Computador 3", 6, 6, 4, 300)); >> computerList.add(new CloudComputer(4L, "Computador 4", 18, 12, 8, >> 1000)); >> computerList.add(new CloudComputer(5L, "Computador 5", 8, 4, 6, 800)); >> computerList.add(new CloudComputer(6L, "Computador 6", 9, 7, 9, 1000)); >> >> List<CloudProcess> processList = new ArrayList<CloudProcess>(); >> processList.add(new CloudProcess(11L, 2, 2, 2)); >> processList.add(new CloudProcess(12L, 4, 4, 2)); >> processList.add(new CloudProcess(13L, 1, 1, 3)); >> processList.add(new CloudProcess(14L, 7, 3, 5)); >> processList.add(new CloudProcess(15L, 5, 8, 3)); >> processList.add(new CloudProcess(16L, 9, 2, 2)); >> processList.add(new CloudProcess(17L, 6, 5, 6)); >> >> CloudBalance cloudBalance = new CloudBalance(); >> cloudBalance.setId(0L); >> cloudBalance.setComputerList(computerList); >> cloudBalance.setProcessList(processList); >> >> // Solve the problem >> solver.setPlanningProblem(cloudBalance); >> solver.solve(); >> CloudBalance solvedCloudBalance = (CloudBalance) >> solver.getBestSolution(); >> >> // Display the result >> System.out.println("\nSolved cloudBalance with 5 computers and 6 >> processes:\n" >> + toDisplayString(solvedCloudBalance)); >> } >> >> public static String toDisplayString(CloudBalance cloudBalance) { >> StringBuilder displayString = new StringBuilder(); >> for (CloudProcess process : cloudBalance.getProcessList()) { >> CloudComputer computer = process.getComputer(); >> displayString.append(" ").append(process.getLabel()) >> .append(" -> ") >> .append(computer == null ? null : computer.getLabel()) >> .append("\n"); >> } >> return displayString.toString(); >> } >> } >> >> ------------- >> >> >> 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com&gt; >> >>> The value of a variable of an entity starts out as null during >>> construction heuristics, even if it's not nullable. >>> >>> The usual trick is to add null safe getters: >>> >>> public class BedDesignation { >>> >>> // bed is planning variable >>> ... >>> public Departement getDepartment() { >>> if (bed == null) { return null;} >>> return bed.getRoom().getDepartement() >>> } >>> } >>> >>> >>> Op 28-01-13 15:13, André Fróes schreef: >>> >>> I've implemented it to see how it would work, now I got another error: >>> >>> --------------- >>> >>> 12:10:41.357 [main] INFO o.d.p.core.solver.DefaultSolver - Solving >>> started: time spend (302), score (null), new best score (null), random seed >>> (0). >>> Exception in thread "main" Exception executing consequence for rule >>> "requiredCpuPowerTotal" in com.swa.planner.domain.rule: >>> java.lang.NullPointerException >>> at >>> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) >>> at >>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297) >>> at >>> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221) >>> at >>> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456) >>> at >>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710) >>> at >>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674) >>> at >>> org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177) >>> at >>> org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92) >>> at >>> org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65) >>> at >>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) >>> at >>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) >>> at com.swa.planner.domain.CloudTest.main(CloudTest.java:65) >>> Caused by: java.lang.NullPointerException >>> at java.lang.String.<init>(Unknown Source) >>> at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) >>> at >>> org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302) >>> at >>> org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) >>> at org.mvel2.MVEL.compileExpression(MVEL.java:810) >>> at >>> org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435) >>> at >>> org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238) >>> at >>> org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206) >>> at >>> org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190) >>> at >>> org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157) >>> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) >>> at >>> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497) >>> at >>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382) >>> at >>> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235) >>> at >>> org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240) >>> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350) >>> at >>> org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38) >>> at >>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204) >>> at >>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176) >>> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231) >>> at >>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903) >>> at >>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245) >>> at >>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210) >>> at >>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205) >>> at >>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bd.defaultConsequence(Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bd.java:14) >>> at >>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bdDefaultConsequenceInvokerGenerated.evaluate(Unknown >>> Source) >>> at >>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bdDefaultConsequenceInvoker.evaluate(Unknown >>> Source) >>> at >>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287) >>> ... 14 more >>> >>> ----------------- >>> >>> this one i have no clue >>> >>> >>> 2013/1/28 André Fróes <arfmoraes(a)gmail.com&gt; >>> >>>> Hello there, i'm getting this error: >>>> >>>> ------------------- >>>> 11:26:50.394 [main] INFO o.d.p.core.solver.DefaultSolver - Solving >>>> started: time spend (187), score (null), new best score (null), random seed >>>> (0). >>>> Exception in thread "main" java.lang.IllegalStateException: The >>>> selectionOrder (DECREASING_DIFFICULTY) can not be used on a PlanningEntity >>>> (com.swa.planner.domain.CloudProcess) that has no support for difficulty >>>> sorting. Check the @PlanningEntity annotation. >>>> at >>>> org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.validate(PlanningEntitySelector.java:53) >>>> at >>>> org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.phaseStarted(PlanningEntitySelector.java:45) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.selector.GreedyPlanningEntitySelector.phaseStarted(GreedyPlanningEntitySelector.java:41) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.phaseStarted(DefaultGreedyFitSolverPhase.java:111) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:57) >>>> at >>>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) >>>> at >>>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) >>>> at com.swa.planner.domain.CloudTest.main(CloudTest.java:51) >>>> ------------------------- >>>> >>>> I know why it is happening though (at least i think so), but will I >>>> have to implement the comparator to every planner I do or is there any >>>> other way to make it work? >>>> >>>> I'm reproducing the example from the guide, when it passes the >>>> drools rules it gives that message. I didn't implement >>>> CloudComputerStrengthComparator neither CloudProcessDifficultyComparator, >>>> will I have to implement those so this example works? >>>> >>> >>> >>> >>> _______________________________________________ >>> rules-users mailing listrules-users@lists.jboss.orghttps://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 >>> >>> >> >> >> _______________________________________________ >> rules-users mailing listrules-users@lists.jboss.orghttps://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 >> >> > _______________________________________________ rules-users mailing listrules-users@lists.jboss.orghttps://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

Which mvel2 jar version? Provided that the mvel version is correct, it looks like the real exception gets eaten... Caused by: java.lang.NullPointerException at java.lang.String.<init>(Unknown Source) at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) If that's true, we need to open a jira. Pinging Mario on this. In any case, the exception message should be much clearer as to what's the problem is. Op 28-01-13 16:51, André Fróes schreef: 5.5.0.Final both 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com&gt; > Which version of planner (drools-planner-core) and drools (drools-core, > drools-compiler)? > Op 28-01-13 16:40, André Fróes schreef: > > I'm comparing both the example and my implementation, can't see anything > different from each other except that example uses that > CloudBalancingGenerator. Even the drl rule remains the same, i wrote it and > then fixed the errors until reach that point. > > > 2013/1/28 André Fróes <arfmoraes(a)gmail.com&gt; > >> this is the full drl file: >> >> ------------ >> >> package com.swa.planner.domain.rule; >> >> import >> org.drools.planner.core.score.buildin.hardandsoft.HardAndSoftScoreHolder; >> import org.drools.planner.core.score.constraint.IntConstraintOccurrence; >> import org.drools.planner.core.score.constraint.ConstraintType; >> >> import com.swa.planner.domain.CloudBalance; >> import com.swa.planner.domain.CloudComputer; >> import com.swa.planner.domain.CloudProcess; >> >> global HardAndSoftScoreHolder scoreHolder; >> >> rule "requiredCpuPowerTotal" >> when >> $computer : CloudComputer($cpuPower : cpuPower) >> $requiredCpuPowerTotal : Number(intValue > $cpuPower) from accumulate( >> CloudProcess ( >> computer == $computer, >> $requiredCpuPower : requiredCpuPower), >> sum($requiredCpuPower) >> ) >> then >> insertLogical(new IntConstraintOccurrence("requiredCpuPowerTotal", >> ConstraintType.NEGATIVE_HARD, >> $requiredCpuPowerTotal.intValue() - $cpuPower, >> $computer)); >> end >> >> rule "requiredMemoryTotal" >> when >> $computer : CloudComputer($memory : memory) >> $requiredMemoryTotal : Number(intValue > $memory) from accumulate( >> CloudProcess ( >> computer == $computer, >> $requiredMemory : requiredMemory), >> sum($requiredMemory) >> ) >> then >> insertLogical(new IntConstraintOccurrence("requiredMemoryTotal", >> ConstraintType.NEGATIVE_HARD, >> $requiredMemoryTotal.intValue() - $memory, >> $computer)); >> end >> >> rule "requiredNetworkBandwidth" >> when >> $computer : CloudComputer($networkBandwidth : networkBandwidth) >> $requiredNetworkBandwidthTotal : Number(intValue > $networkBandwidth) >> from accumulate( >> CloudProcess ( >> computer == $computer, >> $requiredNetworkBandwidth : requiredNetworkBandwidth) >> sum($requiredNetworkBandwidth) >> ) >> then >> insertLogical(new IntConstraintOccurrence("requiredNetworkBandwidth", >> ConstraintType.NEGATIVE_HARD, >> $requiredNetworkBandwidthTotal.intValue() - $networkBandwidth, >> $computer)); >> end >> >> rule "hardConstraintBroken" >> salience -1 >> when >> $hardTotal : Number() from accumulate( >> IntConstraintOccurrence(constraintType == >> ConstraintType.NEGATIVE_HARD, $weight : weight) >> sum($weight) >> ) >> then >> scoreHolder.setHardConstraintsBroken($hardTotal.intValue()); >> end >> >> >> // Soft constraint >> >> rule "computerCost" >> when >> $computer : CloudComputer($cost : cost) >> exists CloudProcess(computer == $computer) >> then >> insertLogical(new IntConstraintOccurrence("computerCost", >> ConstraintType.NEGATIVE_SOFT, >> $cost, >> $computer)); >> end >> >> rule "softConstraintBroken" >> salience -1 >> when >> $softTotal : Number() from accumulate( >> IntConstraintOccurrence(ConstraintType == >> ConstraintType.NEGATIVE_SOFT, $weight : weight) >> sum($weight) >> ) >> then >> scoreHolder.setHardConstraintsBroken($softTotal.intValue()); >> end >> >> >> 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com&gt; >> >>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.defaultConsequence(Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.java:14) >>> >>> What's in the then side of Rule_requiredCpuPowerTotal ? >>> >>> Op 28-01-13 16:00, André Fróes schreef: >>> >>> Even adding that, the error still >>> >>> -------------- >>> 12:57:41.050 [main] INFO o.d.p.core.solver.DefaultSolver - Solving >>> started: time spend (152), score (null), new best score (null), random seed >>> (0). >>> Exception in thread "main" Exception executing consequence for rule >>> "requiredCpuPowerTotal" in com.swa.planner.domain.rule: >>> java.lang.NullPointerException >>> at >>> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) >>> at >>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297) >>> at >>> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221) >>> at >>> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456) >>> at >>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710) >>> at >>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674) >>> at >>> org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177) >>> at >>> org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92) >>> at >>> org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65) >>> at >>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) >>> at >>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) >>> at com.swa.planner.domain.CloudTest.main(CloudTest.java:67) >>> Caused by: java.lang.NullPointerException >>> at java.lang.String.<init>(Unknown Source) >>> at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) >>> at >>> org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302) >>> at >>> org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) >>> at org.mvel2.MVEL.compileExpression(MVEL.java:810) >>> at >>> org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435) >>> at >>> org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238) >>> at >>> org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206) >>> at >>> org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190) >>> at >>> org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157) >>> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) >>> at >>> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497) >>> at >>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382) >>> at >>> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235) >>> at >>> org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240) >>> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350) >>> at >>> org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38) >>> at >>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204) >>> at >>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176) >>> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231) >>> at >>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903) >>> at >>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245) >>> at >>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210) >>> at >>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205) >>> at >>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.defaultConsequence(Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.java:14) >>> at >>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvokerGenerated.evaluate(Unknown >>> Source) >>> at >>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvoker.evaluate(Unknown >>> Source) >>> at >>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287) >>> ... 14 more >>> >>> -------------- >>> >>> I added to cloudprocess computer variable: >>> -------------- >>> package com.swa.planner.domain; >>> >>> import org.drools.planner.api.domain.entity.PlanningEntity; >>> import org.drools.planner.api.domain.variable.PlanningVariable; >>> import org.drools.planner.api.domain.variable.ValueRange; >>> import org.drools.planner.api.domain.variable.ValueRangeType; >>> import org.drools.planner.examples.common.domain.AbstractPersistable; >>> >>> @PlanningEntity(difficultyComparatorClass = >>> CloudProcessDifficultyComparator.class) >>> public class CloudProcess extends AbstractPersistable{ >>> >>> private int requiredCpuPower; >>> private int requiredMemory; >>> private int requiredNetworkBandwidth; >>> >>> private CloudComputer computer; >>> >>> public CloudProcess(long id, int requiredCpuPower, int requiredMemory, >>> int requiredNetworkBandwidth) { >>> super(); >>> setId(id); >>> this.requiredCpuPower = requiredCpuPower; >>> this.requiredMemory = requiredMemory; >>> this.requiredNetworkBandwidth = requiredNetworkBandwidth; >>> } >>> public CloudProcess() { } >>> >>> public int getRequiredCpuPower() { >>> return requiredCpuPower; >>> } >>> >>> public void setRequiredCpuPower(int requiredCpuPower) { >>> this.requiredCpuPower = requiredCpuPower; >>> } >>> >>> public int getRequiredMemory() { >>> return requiredMemory; >>> } >>> >>> public void setRequiredMemory(int requiredMemory) { >>> this.requiredMemory = requiredMemory; >>> } >>> >>> public int getRequiredNetworkBandwidth() { >>> return requiredNetworkBandwidth; >>> } >>> >>> public void setRequiredNetworkBandwidth(int requiredNetworkBandwidth) >>> { >>> this.requiredNetworkBandwidth = requiredNetworkBandwidth; >>> } >>> >>> public String getLabel() { >>> return "Process " + id; >>> } >>> @PlanningVariable(strengthComparatorClass = >>> CloudComputerStrengthComparator.class) >>> @ValueRange(type = ValueRangeType.FROM_SOLUTION_PROPERTY, >>> solutionProperty = "computerList") >>> public CloudComputer getComputer() { >>> if (computer == null) { return null; } >>> return computer; >>> } >>> >>> public void setComputer(CloudComputer computer) { >>> this.computer = computer; >>> } >>> public CloudProcess clone(){ >>> CloudProcess clone = new CloudProcess(); >>> clone.id = id; >>> clone.requiredCpuPower = requiredCpuPower; >>> clone.requiredMemory = requiredMemory; >>> clone.requiredNetworkBandwidth = requiredNetworkBandwidth; >>> clone.computer = computer; >>> return clone; >>> } >>> public int getRequiredMultiplicand() { >>> return requiredCpuPower * requiredMemory * >>> requiredNetworkBandwidth; >>> } >>> } >>> -------------- >>> >>> this is what i'm doing to run the example: >>> >>> ------------- >>> package com.swa.planner.domain; >>> >>> import java.io.ByteArrayInputStream; >>> import java.util.ArrayList; >>> import java.util.List; >>> >>> import org.drools.planner.config.SolverFactory; >>> import org.drools.planner.config.XmlSolverFactory; >>> import org.drools.planner.core.Solver; >>> >>> public class CloudTest { >>> public static void main(String[] args) { >>> String t = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" >>> + "<solver>" >>> + " >>> <solutionClass>com.swa.planner.domain.CloudBalance</solutionClass>" >>> + " >>> <planningEntityClass>com.swa.planner.domain.CloudProcess</planningEntityClass>" >>> + " <scoreDirectorFactory>" >>> + " <scoreDefinitionType>HARD_AND_SOFT</scoreDefinitionType>" >>> + " >>> <scoreDrl>/com/swa/planner/domain/rule/cloudBalancingScoreRules.drl</scoreDrl>" >>> + " </scoreDirectorFactory>" >>> + " <termination>" >>> + " <maximumSecondsSpend>120</maximumSecondsSpend>" >>> + " </termination>" >>> + " <constructionHeuristic>" >>> + " >>> <constructionHeuristicType>FIRST_FIT_DECREASING</constructionHeuristicType>" >>> + " >>> <constructionHeuristicPickEarlyType>FIRST_LAST_STEP_SCORE_EQUAL_OR_IMPROVING</constructionHeuristicPickEarlyType>" >>> + " </constructionHeuristic>" >>> + " <localSearch>" >>> + " <acceptor>" >>> + " <planningEntityTabuSize>7</planningEntityTabuSize>" >>> + " </acceptor>" >>> + " <forager>" >>> + " <minimalAcceptedSelection>1000</minimalAcceptedSelection>" >>> + " </forager>" >>> + " </localSearch>" >>> + "</solver>"; >>> >>> byte b[] = t.getBytes(); >>> ByteArrayInputStream bt = new ByteArrayInputStream(b); >>> SolverFactory solverFactory = new XmlSolverFactory().configure(bt); >>> Solver solver = solverFactory.buildSolver(); >>> >>> List<CloudComputer> computerList = new ArrayList<CloudComputer>(); >>> computerList.add(new CloudComputer(1L, "Computador 1", 3, 2, 2, 110)); >>> computerList.add(new CloudComputer(2L, "Computador 2", 12, 8, 3, >>> 400)); >>> computerList.add(new CloudComputer(3L, "Computador 3", 6, 6, 4, 300)); >>> computerList.add(new CloudComputer(4L, "Computador 4", 18, 12, 8, >>> 1000)); >>> computerList.add(new CloudComputer(5L, "Computador 5", 8, 4, 6, 800)); >>> computerList.add(new CloudComputer(6L, "Computador 6", 9, 7, 9, >>> 1000)); >>> >>> List<CloudProcess> processList = new ArrayList<CloudProcess>(); >>> processList.add(new CloudProcess(11L, 2, 2, 2)); >>> processList.add(new CloudProcess(12L, 4, 4, 2)); >>> processList.add(new CloudProcess(13L, 1, 1, 3)); >>> processList.add(new CloudProcess(14L, 7, 3, 5)); >>> processList.add(new CloudProcess(15L, 5, 8, 3)); >>> processList.add(new CloudProcess(16L, 9, 2, 2)); >>> processList.add(new CloudProcess(17L, 6, 5, 6)); >>> >>> CloudBalance cloudBalance = new CloudBalance(); >>> cloudBalance.setId(0L); >>> cloudBalance.setComputerList(computerList); >>> cloudBalance.setProcessList(processList); >>> >>> // Solve the problem >>> solver.setPlanningProblem(cloudBalance); >>> solver.solve(); >>> CloudBalance solvedCloudBalance = (CloudBalance) >>> solver.getBestSolution(); >>> >>> // Display the result >>> System.out.println("\nSolved cloudBalance with 5 computers and 6 >>> processes:\n" >>> + toDisplayString(solvedCloudBalance)); >>> } >>> >>> public static String toDisplayString(CloudBalance cloudBalance) { >>> StringBuilder displayString = new StringBuilder(); >>> for (CloudProcess process : cloudBalance.getProcessList()) { >>> CloudComputer computer = process.getComputer(); >>> displayString.append(" ").append(process.getLabel()) >>> .append(" -> ") >>> .append(computer == null ? null : computer.getLabel()) >>> .append("\n"); >>> } >>> return displayString.toString(); >>> } >>> } >>> >>> ------------- >>> >>> >>> 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com&gt; >>> >>>> The value of a variable of an entity starts out as null during >>>> construction heuristics, even if it's not nullable. >>>> >>>> The usual trick is to add null safe getters: >>>> >>>> public class BedDesignation { >>>> >>>> // bed is planning variable >>>> ... >>>> public Departement getDepartment() { >>>> if (bed == null) { return null;} >>>> return bed.getRoom().getDepartement() >>>> } >>>> } >>>> >>>> >>>> Op 28-01-13 15:13, André Fróes schreef: >>>> >>>> I've implemented it to see how it would work, now I got another error: >>>> >>>> --------------- >>>> >>>> 12:10:41.357 [main] INFO o.d.p.core.solver.DefaultSolver - Solving >>>> started: time spend (302), score (null), new best score (null), random seed >>>> (0). >>>> Exception in thread "main" Exception executing consequence for rule >>>> "requiredCpuPowerTotal" in com.swa.planner.domain.rule: >>>> java.lang.NullPointerException >>>> at >>>> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) >>>> at >>>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297) >>>> at >>>> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221) >>>> at >>>> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456) >>>> at >>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710) >>>> at >>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674) >>>> at >>>> org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177) >>>> at >>>> org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92) >>>> at >>>> org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65) >>>> at >>>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) >>>> at >>>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) >>>> at com.swa.planner.domain.CloudTest.main(CloudTest.java:65) >>>> Caused by: java.lang.NullPointerException >>>> at java.lang.String.<init>(Unknown Source) >>>> at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) >>>> at >>>> org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302) >>>> at >>>> org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) >>>> at org.mvel2.MVEL.compileExpression(MVEL.java:810) >>>> at >>>> org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435) >>>> at >>>> org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238) >>>> at >>>> org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206) >>>> at >>>> org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190) >>>> at >>>> org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157) >>>> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) >>>> at >>>> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497) >>>> at >>>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382) >>>> at >>>> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235) >>>> at >>>> org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240) >>>> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350) >>>> at >>>> org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38) >>>> at >>>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204) >>>> at >>>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176) >>>> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231) >>>> at >>>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903) >>>> at >>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245) >>>> at >>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210) >>>> at >>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205) >>>> at >>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bd.defaultConsequence(Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bd.java:14) >>>> at >>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bdDefaultConsequenceInvokerGenerated.evaluate(Unknown >>>> Source) >>>> at >>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bdDefaultConsequenceInvoker.evaluate(Unknown >>>> Source) >>>> at >>>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287) >>>> ... 14 more >>>> >>>> ----------------- >>>> >>>> this one i have no clue >>>> >>>> >>>> 2013/1/28 André Fróes <arfmoraes(a)gmail.com&gt; >>>> >>>>> Hello there, i'm getting this error: >>>>> >>>>> ------------------- >>>>> 11:26:50.394 [main] INFO o.d.p.core.solver.DefaultSolver - Solving >>>>> started: time spend (187), score (null), new best score (null), random seed >>>>> (0). >>>>> Exception in thread "main" java.lang.IllegalStateException: The >>>>> selectionOrder (DECREASING_DIFFICULTY) can not be used on a PlanningEntity >>>>> (com.swa.planner.domain.CloudProcess) that has no support for difficulty >>>>> sorting. Check the @PlanningEntity annotation. >>>>> at >>>>> org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.validate(PlanningEntitySelector.java:53) >>>>> at >>>>> org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.phaseStarted(PlanningEntitySelector.java:45) >>>>> at >>>>> org.drools.planner.core.constructionheuristic.greedyFit.selector.GreedyPlanningEntitySelector.phaseStarted(GreedyPlanningEntitySelector.java:41) >>>>> at >>>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.phaseStarted(DefaultGreedyFitSolverPhase.java:111) >>>>> at >>>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:57) >>>>> at >>>>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) >>>>> at >>>>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) >>>>> at com.swa.planner.domain.CloudTest.main(CloudTest.java:51) >>>>> ------------------------- >>>>> >>>>> I know why it is happening though (at least i think so), but will I >>>>> have to implement the comparator to every planner I do or is there any >>>>> other way to make it work? >>>>> >>>>> I'm reproducing the example from the guide, when it passes the >>>>> drools rules it gives that message. I didn't implement >>>>> CloudComputerStrengthComparator neither CloudProcessDifficultyComparator, >>>>> will I have to implement those so this example works? >>>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> rules-users mailing listrules-users@lists.jboss.orghttps://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 >>>> >>>> >>> >>> >>> _______________________________________________ >>> rules-users mailing listrules-users@lists.jboss.orghttps://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 >>> >>> >> > > > _______________________________________________ > rules-users mailing listrules-users@lists.jboss.orghttps://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 > > _______________________________________________ rules-users mailing listrules-users@lists.jboss.orghttps://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

Mario agrees that the real exception might be eaten and he's looking into fixing that (if it's indeed that problem). As a workaround, put a debug breakpoint here to figure out what the real exception is: org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) Op 28-01-13 17:08, André Fróes schreef: I'm sending a screenshot of my libs, all from the bundle downloaded from site. Also sending the full proj if u want to analyze. [image: Imagem inline 1] 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com&gt; > Which mvel2 jar version? > > Provided that the mvel version is correct, it looks like the real > exception gets eaten... > > Caused by: java.lang.NullPointerException > at java.lang.String.<init>(Unknown Source) > at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) > > If that's true, we need to open a jira. Pinging Mario on this. > > In any case, the exception message should be much clearer as to what's > the problem is. > > Op 28-01-13 16:51, André Fróes schreef: > > 5.5.0.Final both > > > 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com&gt; > >> Which version of planner (drools-planner-core) and drools (drools-core, >> drools-compiler)? >> Op 28-01-13 16:40, André Fróes schreef: >> >> I'm comparing both the example and my implementation, can't see anything >> different from each other except that example uses that >> CloudBalancingGenerator. Even the drl rule remains the same, i wrote it and >> then fixed the errors until reach that point. >> >> >> 2013/1/28 André Fróes <arfmoraes(a)gmail.com&gt; >> >>> this is the full drl file: >>> >>> ------------ >>> >>> package com.swa.planner.domain.rule; >>> >>> import >>> org.drools.planner.core.score.buildin.hardandsoft.HardAndSoftScoreHolder; >>> import org.drools.planner.core.score.constraint.IntConstraintOccurrence; >>> import org.drools.planner.core.score.constraint.ConstraintType; >>> >>> import com.swa.planner.domain.CloudBalance; >>> import com.swa.planner.domain.CloudComputer; >>> import com.swa.planner.domain.CloudProcess; >>> >>> global HardAndSoftScoreHolder scoreHolder; >>> >>> rule "requiredCpuPowerTotal" >>> when >>> $computer : CloudComputer($cpuPower : cpuPower) >>> $requiredCpuPowerTotal : Number(intValue > $cpuPower) from accumulate( >>> CloudProcess ( >>> computer == $computer, >>> $requiredCpuPower : requiredCpuPower), >>> sum($requiredCpuPower) >>> ) >>> then >>> insertLogical(new IntConstraintOccurrence("requiredCpuPowerTotal", >>> ConstraintType.NEGATIVE_HARD, >>> $requiredCpuPowerTotal.intValue() - $cpuPower, >>> $computer)); >>> end >>> >>> rule "requiredMemoryTotal" >>> when >>> $computer : CloudComputer($memory : memory) >>> $requiredMemoryTotal : Number(intValue > $memory) from accumulate( >>> CloudProcess ( >>> computer == $computer, >>> $requiredMemory : requiredMemory), >>> sum($requiredMemory) >>> ) >>> then >>> insertLogical(new IntConstraintOccurrence("requiredMemoryTotal", >>> ConstraintType.NEGATIVE_HARD, >>> $requiredMemoryTotal.intValue() - $memory, >>> $computer)); >>> end >>> >>> rule "requiredNetworkBandwidth" >>> when >>> $computer : CloudComputer($networkBandwidth : networkBandwidth) >>> $requiredNetworkBandwidthTotal : Number(intValue > $networkBandwidth) >>> from accumulate( >>> CloudProcess ( >>> computer == $computer, >>> $requiredNetworkBandwidth : requiredNetworkBandwidth) >>> sum($requiredNetworkBandwidth) >>> ) >>> then >>> insertLogical(new IntConstraintOccurrence("requiredNetworkBandwidth", >>> ConstraintType.NEGATIVE_HARD, >>> $requiredNetworkBandwidthTotal.intValue() - $networkBandwidth, >>> $computer)); >>> end >>> >>> rule "hardConstraintBroken" >>> salience -1 >>> when >>> $hardTotal : Number() from accumulate( >>> IntConstraintOccurrence(constraintType == >>> ConstraintType.NEGATIVE_HARD, $weight : weight) >>> sum($weight) >>> ) >>> then >>> scoreHolder.setHardConstraintsBroken($hardTotal.intValue()); >>> end >>> >>> >>> // Soft constraint >>> >>> rule "computerCost" >>> when >>> $computer : CloudComputer($cost : cost) >>> exists CloudProcess(computer == $computer) >>> then >>> insertLogical(new IntConstraintOccurrence("computerCost", >>> ConstraintType.NEGATIVE_SOFT, >>> $cost, >>> $computer)); >>> end >>> >>> rule "softConstraintBroken" >>> salience -1 >>> when >>> $softTotal : Number() from accumulate( >>> IntConstraintOccurrence(ConstraintType == >>> ConstraintType.NEGATIVE_SOFT, $weight : weight) >>> sum($weight) >>> ) >>> then >>> scoreHolder.setHardConstraintsBroken($softTotal.intValue()); >>> end >>> >>> >>> 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com&gt; >>> >>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.defaultConsequence(Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.java:14) >>>> >>>> What's in the then side of Rule_requiredCpuPowerTotal ? >>>> >>>> Op 28-01-13 16:00, André Fróes schreef: >>>> >>>> Even adding that, the error still >>>> >>>> -------------- >>>> 12:57:41.050 [main] INFO o.d.p.core.solver.DefaultSolver - Solving >>>> started: time spend (152), score (null), new best score (null), random seed >>>> (0). >>>> Exception in thread "main" Exception executing consequence for rule >>>> "requiredCpuPowerTotal" in com.swa.planner.domain.rule: >>>> java.lang.NullPointerException >>>> at >>>> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) >>>> at >>>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297) >>>> at >>>> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221) >>>> at >>>> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456) >>>> at >>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710) >>>> at >>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674) >>>> at >>>> org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177) >>>> at >>>> org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92) >>>> at >>>> org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65) >>>> at >>>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) >>>> at >>>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) >>>> at com.swa.planner.domain.CloudTest.main(CloudTest.java:67) >>>> Caused by: java.lang.NullPointerException >>>> at java.lang.String.<init>(Unknown Source) >>>> at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) >>>> at >>>> org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302) >>>> at >>>> org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) >>>> at org.mvel2.MVEL.compileExpression(MVEL.java:810) >>>> at >>>> org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435) >>>> at >>>> org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238) >>>> at >>>> org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206) >>>> at >>>> org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190) >>>> at >>>> org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157) >>>> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) >>>> at >>>> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497) >>>> at >>>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382) >>>> at >>>> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235) >>>> at >>>> org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240) >>>> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350) >>>> at >>>> org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38) >>>> at >>>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204) >>>> at >>>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176) >>>> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231) >>>> at >>>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903) >>>> at >>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245) >>>> at >>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210) >>>> at >>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205) >>>> at >>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.defaultConsequence(Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.java:14) >>>> at >>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvokerGenerated.evaluate(Unknown >>>> Source) >>>> at >>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvoker.evaluate(Unknown >>>> Source) >>>> at >>>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287) >>>> ... 14 more >>>> >>>> -------------- >>>> >>>> I added to cloudprocess computer variable: >>>> -------------- >>>> package com.swa.planner.domain; >>>> >>>> import org.drools.planner.api.domain.entity.PlanningEntity; >>>> import org.drools.planner.api.domain.variable.PlanningVariable; >>>> import org.drools.planner.api.domain.variable.ValueRange; >>>> import org.drools.planner.api.domain.variable.ValueRangeType; >>>> import org.drools.planner.examples.common.domain.AbstractPersistable; >>>> >>>> @PlanningEntity(difficultyComparatorClass = >>>> CloudProcessDifficultyComparator.class) >>>> public class CloudProcess extends AbstractPersistable{ >>>> >>>> private int requiredCpuPower; >>>> private int requiredMemory; >>>> private int requiredNetworkBandwidth; >>>> >>>> private CloudComputer computer; >>>> >>>> public CloudProcess(long id, int requiredCpuPower, int >>>> requiredMemory, >>>> int requiredNetworkBandwidth) { >>>> super(); >>>> setId(id); >>>> this.requiredCpuPower = requiredCpuPower; >>>> this.requiredMemory = requiredMemory; >>>> this.requiredNetworkBandwidth = requiredNetworkBandwidth; >>>> } >>>> public CloudProcess() { } >>>> >>>> public int getRequiredCpuPower() { >>>> return requiredCpuPower; >>>> } >>>> >>>> public void setRequiredCpuPower(int requiredCpuPower) { >>>> this.requiredCpuPower = requiredCpuPower; >>>> } >>>> >>>> public int getRequiredMemory() { >>>> return requiredMemory; >>>> } >>>> >>>> public void setRequiredMemory(int requiredMemory) { >>>> this.requiredMemory = requiredMemory; >>>> } >>>> >>>> public int getRequiredNetworkBandwidth() { >>>> return requiredNetworkBandwidth; >>>> } >>>> >>>> public void setRequiredNetworkBandwidth(int >>>> requiredNetworkBandwidth) { >>>> this.requiredNetworkBandwidth = requiredNetworkBandwidth; >>>> } >>>> >>>> public String getLabel() { >>>> return "Process " + id; >>>> } >>>> @PlanningVariable(strengthComparatorClass = >>>> CloudComputerStrengthComparator.class) >>>> @ValueRange(type = ValueRangeType.FROM_SOLUTION_PROPERTY, >>>> solutionProperty = "computerList") >>>> public CloudComputer getComputer() { >>>> if (computer == null) { return null; } >>>> return computer; >>>> } >>>> >>>> public void setComputer(CloudComputer computer) { >>>> this.computer = computer; >>>> } >>>> public CloudProcess clone(){ >>>> CloudProcess clone = new CloudProcess(); >>>> clone.id = id; >>>> clone.requiredCpuPower = requiredCpuPower; >>>> clone.requiredMemory = requiredMemory; >>>> clone.requiredNetworkBandwidth = requiredNetworkBandwidth; >>>> clone.computer = computer; >>>> return clone; >>>> } >>>> public int getRequiredMultiplicand() { >>>> return requiredCpuPower * requiredMemory * >>>> requiredNetworkBandwidth; >>>> } >>>> } >>>> -------------- >>>> >>>> this is what i'm doing to run the example: >>>> >>>> ------------- >>>> package com.swa.planner.domain; >>>> >>>> import java.io.ByteArrayInputStream; >>>> import java.util.ArrayList; >>>> import java.util.List; >>>> >>>> import org.drools.planner.config.SolverFactory; >>>> import org.drools.planner.config.XmlSolverFactory; >>>> import org.drools.planner.core.Solver; >>>> >>>> public class CloudTest { >>>> public static void main(String[] args) { >>>> String t = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" >>>> + "<solver>" >>>> + " >>>> <solutionClass>com.swa.planner.domain.CloudBalance</solutionClass>" >>>> + " >>>> <planningEntityClass>com.swa.planner.domain.CloudProcess</planningEntityClass>" >>>> + " <scoreDirectorFactory>" >>>> + " <scoreDefinitionType>HARD_AND_SOFT</scoreDefinitionType>" >>>> + " >>>> <scoreDrl>/com/swa/planner/domain/rule/cloudBalancingScoreRules.drl</scoreDrl>" >>>> + " </scoreDirectorFactory>" >>>> + " <termination>" >>>> + " <maximumSecondsSpend>120</maximumSecondsSpend>" >>>> + " </termination>" >>>> + " <constructionHeuristic>" >>>> + " >>>> <constructionHeuristicType>FIRST_FIT_DECREASING</constructionHeuristicType>" >>>> + " >>>> <constructionHeuristicPickEarlyType>FIRST_LAST_STEP_SCORE_EQUAL_OR_IMPROVING</constructionHeuristicPickEarlyType>" >>>> + " </constructionHeuristic>" >>>> + " <localSearch>" >>>> + " <acceptor>" >>>> + " <planningEntityTabuSize>7</planningEntityTabuSize>" >>>> + " </acceptor>" >>>> + " <forager>" >>>> + " <minimalAcceptedSelection>1000</minimalAcceptedSelection>" >>>> + " </forager>" >>>> + " </localSearch>" >>>> + "</solver>"; >>>> >>>> byte b[] = t.getBytes(); >>>> ByteArrayInputStream bt = new ByteArrayInputStream(b); >>>> SolverFactory solverFactory = new XmlSolverFactory().configure(bt); >>>> Solver solver = solverFactory.buildSolver(); >>>> >>>> List<CloudComputer> computerList = new ArrayList<CloudComputer>(); >>>> computerList.add(new CloudComputer(1L, "Computador 1", 3, 2, 2, >>>> 110)); >>>> computerList.add(new CloudComputer(2L, "Computador 2", 12, 8, 3, >>>> 400)); >>>> computerList.add(new CloudComputer(3L, "Computador 3", 6, 6, 4, >>>> 300)); >>>> computerList.add(new CloudComputer(4L, "Computador 4", 18, 12, 8, >>>> 1000)); >>>> computerList.add(new CloudComputer(5L, "Computador 5", 8, 4, 6, >>>> 800)); >>>> computerList.add(new CloudComputer(6L, "Computador 6", 9, 7, 9, >>>> 1000)); >>>> >>>> List<CloudProcess> processList = new ArrayList<CloudProcess>(); >>>> processList.add(new CloudProcess(11L, 2, 2, 2)); >>>> processList.add(new CloudProcess(12L, 4, 4, 2)); >>>> processList.add(new CloudProcess(13L, 1, 1, 3)); >>>> processList.add(new CloudProcess(14L, 7, 3, 5)); >>>> processList.add(new CloudProcess(15L, 5, 8, 3)); >>>> processList.add(new CloudProcess(16L, 9, 2, 2)); >>>> processList.add(new CloudProcess(17L, 6, 5, 6)); >>>> >>>> CloudBalance cloudBalance = new CloudBalance(); >>>> cloudBalance.setId(0L); >>>> cloudBalance.setComputerList(computerList); >>>> cloudBalance.setProcessList(processList); >>>> >>>> // Solve the problem >>>> solver.setPlanningProblem(cloudBalance); >>>> solver.solve(); >>>> CloudBalance solvedCloudBalance = (CloudBalance) >>>> solver.getBestSolution(); >>>> >>>> // Display the result >>>> System.out.println("\nSolved cloudBalance with 5 computers and 6 >>>> processes:\n" >>>> + toDisplayString(solvedCloudBalance)); >>>> } >>>> >>>> public static String toDisplayString(CloudBalance cloudBalance) { >>>> StringBuilder displayString = new StringBuilder(); >>>> for (CloudProcess process : cloudBalance.getProcessList()) { >>>> CloudComputer computer = process.getComputer(); >>>> displayString.append(" ").append(process.getLabel()) >>>> .append(" -> ") >>>> .append(computer == null ? null : computer.getLabel()) >>>> .append("\n"); >>>> } >>>> return displayString.toString(); >>>> } >>>> } >>>> >>>> ------------- >>>> >>>> >>>> 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com&gt; >>>> >>>>> The value of a variable of an entity starts out as null during >>>>> construction heuristics, even if it's not nullable. >>>>> >>>>> The usual trick is to add null safe getters: >>>>> >>>>> public class BedDesignation { >>>>> >>>>> // bed is planning variable >>>>> ... >>>>> public Departement getDepartment() { >>>>> if (bed == null) { return null;} >>>>> return bed.getRoom().getDepartement() >>>>> } >>>>> } >>>>> >>>>> >>>>> Op 28-01-13 15:13, André Fróes schreef: >>>>> >>>>> I've implemented it to see how it would work, now I got another >>>>> error: >>>>> >>>>> --------------- >>>>> >>>>> 12:10:41.357 [main] INFO o.d.p.core.solver.DefaultSolver - Solving >>>>> started: time spend (302), score (null), new best score (null), random seed >>>>> (0). >>>>> Exception in thread "main" Exception executing consequence for rule >>>>> "requiredCpuPowerTotal" in com.swa.planner.domain.rule: >>>>> java.lang.NullPointerException >>>>> at >>>>> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) >>>>> at >>>>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297) >>>>> at >>>>> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221) >>>>> at >>>>> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456) >>>>> at >>>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710) >>>>> at >>>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674) >>>>> at >>>>> org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177) >>>>> at >>>>> org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92) >>>>> at >>>>> org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120) >>>>> at >>>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136) >>>>> at >>>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110) >>>>> at >>>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82) >>>>> at >>>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65) >>>>> at >>>>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) >>>>> at >>>>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) >>>>> at com.swa.planner.domain.CloudTest.main(CloudTest.java:65) >>>>> Caused by: java.lang.NullPointerException >>>>> at java.lang.String.<init>(Unknown Source) >>>>> at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) >>>>> at >>>>> org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302) >>>>> at >>>>> org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) >>>>> at org.mvel2.MVEL.compileExpression(MVEL.java:810) >>>>> at >>>>> org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435) >>>>> at >>>>> org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238) >>>>> at >>>>> org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206) >>>>> at >>>>> org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190) >>>>> at >>>>> org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157) >>>>> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) >>>>> at >>>>> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497) >>>>> at >>>>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382) >>>>> at >>>>> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235) >>>>> at >>>>> org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240) >>>>> at >>>>> org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350) >>>>> at >>>>> org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38) >>>>> at >>>>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204) >>>>> at >>>>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176) >>>>> at >>>>> org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231) >>>>> at >>>>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903) >>>>> at >>>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245) >>>>> at >>>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210) >>>>> at >>>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205) >>>>> at >>>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bd.defaultConsequence(Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bd.java:14) >>>>> at >>>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bdDefaultConsequenceInvokerGenerated.evaluate(Unknown >>>>> Source) >>>>> at >>>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bdDefaultConsequenceInvoker.evaluate(Unknown >>>>> Source) >>>>> at >>>>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287) >>>>> ... 14 more >>>>> >>>>> ----------------- >>>>> >>>>> this one i have no clue >>>>> >>>>> >>>>> 2013/1/28 André Fróes <arfmoraes(a)gmail.com&gt; >>>>> >>>>>> Hello there, i'm getting this error: >>>>>> >>>>>> ------------------- >>>>>> 11:26:50.394 [main] INFO o.d.p.core.solver.DefaultSolver - >>>>>> Solving started: time spend (187), score (null), new best score (null), >>>>>> random seed (0). >>>>>> Exception in thread "main" java.lang.IllegalStateException: The >>>>>> selectionOrder (DECREASING_DIFFICULTY) can not be used on a PlanningEntity >>>>>> (com.swa.planner.domain.CloudProcess) that has no support for difficulty >>>>>> sorting. Check the @PlanningEntity annotation. >>>>>> at >>>>>> org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.validate(PlanningEntitySelector.java:53) >>>>>> at >>>>>> org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.phaseStarted(PlanningEntitySelector.java:45) >>>>>> at >>>>>> org.drools.planner.core.constructionheuristic.greedyFit.selector.GreedyPlanningEntitySelector.phaseStarted(GreedyPlanningEntitySelector.java:41) >>>>>> at >>>>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.phaseStarted(DefaultGreedyFitSolverPhase.java:111) >>>>>> at >>>>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:57) >>>>>> at >>>>>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) >>>>>> at >>>>>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) >>>>>> at com.swa.planner.domain.CloudTest.main(CloudTest.java:51) >>>>>> ------------------------- >>>>>> >>>>>> I know why it is happening though (at least i think so), but will >>>>>> I have to implement the comparator to every planner I do or is there any >>>>>> other way to make it work? >>>>>> >>>>>> I'm reproducing the example from the guide, when it passes the >>>>>> drools rules it gives that message. I didn't implement >>>>>> CloudComputerStrengthComparator neither CloudProcessDifficultyComparator, >>>>>> will I have to implement those so this example works? >>>>>> >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> rules-users mailing listrules-users@lists.jboss.orghttps://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 >>>>> >>>>> >>>> >>>> >>>> _______________________________________________ >>>> rules-users mailing listrules-users@lists.jboss.orghttps://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 >>>> >>>> >>> >> >> >> _______________________________________________ >> rules-users mailing listrules-users@lists.jboss.orghttps://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 >> >> > > > _______________________________________________ > rules-users mailing listrules-users@lists.jboss.orghttps://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 > > _______________________________________________ rules-users mailing listrules-users@lists.jboss.orghttps://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

I'm sending a screenshot of my libs, all from the bundle downloaded from site. Also sending the full proj if u want to analyze. Imagem inline 1 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com <mailto:ge0ffrey.spam@gmail.com>> Which mvel2 jar version? Provided that the mvel version is correct, it looks like the real exception gets eaten... > Caused by: java.lang.NullPointerException > at java.lang.String.<init>(Unknown Source) > at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) If that's true, we need to open a jira. Pinging Mario on this. In any case, the exception message should be much clearer as to what's the problem is. Op 28-01-13 16:51, André Fróes schreef: > 5.5.0.Final both > > > 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com > <mailto:ge0ffrey.spam@gmail.com>> > > Which version of planner (drools-planner-core) and drools > (drools-core, drools-compiler)? > Op 28-01-13 16:40, André Fróes schreef: >> I'm comparing both the example and my implementation, can't >> see anything different from each other except that example >> uses that CloudBalancingGenerator. Even the drl rule remains >> the same, i wrote it and then fixed the errors until reach >> that point. >> >> >> 2013/1/28 André Fróes <arfmoraes(a)gmail.com >> <mailto:arfmoraes@gmail.com>> >> >> this is the full drl file: >> >> ------------ >> >> package com.swa.planner.domain.rule; >> >> import >> org.drools.planner.core.score.buildin.hardandsoft.HardAndSoftScoreHolder; >> import >> org.drools.planner.core.score.constraint.IntConstraintOccurrence; >> import >> org.drools.planner.core.score.constraint.ConstraintType; >> >> import com.swa.planner.domain.CloudBalance; >> import com.swa.planner.domain.CloudComputer; >> import com.swa.planner.domain.CloudProcess; >> >> global HardAndSoftScoreHolder scoreHolder; >> >> rule "requiredCpuPowerTotal" >> when >> $computer : CloudComputer($cpuPower : cpuPower) >> $requiredCpuPowerTotal : Number(intValue > $cpuPower) >> from accumulate( >> CloudProcess ( >> computer == $computer, >> $requiredCpuPower : requiredCpuPower), >> sum($requiredCpuPower) >> ) >> then >> insertLogical(new >> IntConstraintOccurrence("requiredCpuPowerTotal", >> ConstraintType.NEGATIVE_HARD, >> $requiredCpuPowerTotal.intValue() - $cpuPower, >> $computer)); >> end >> >> rule "requiredMemoryTotal" >> when >> $computer : CloudComputer($memory : memory) >> $requiredMemoryTotal : Number(intValue > $memory) from >> accumulate( >> CloudProcess ( >> computer == $computer, >> $requiredMemory : requiredMemory), >> sum($requiredMemory) >> ) >> then >> insertLogical(new >> IntConstraintOccurrence("requiredMemoryTotal", >> ConstraintType.NEGATIVE_HARD, >> $requiredMemoryTotal.intValue() - $memory, >> $computer)); >> end >> >> rule "requiredNetworkBandwidth" >> when >> $computer : CloudComputer($networkBandwidth : >> networkBandwidth) >> $requiredNetworkBandwidthTotal : Number(intValue > >> $networkBandwidth) from accumulate( >> CloudProcess ( >> computer == $computer, >> $requiredNetworkBandwidth : requiredNetworkBandwidth) >> sum($requiredNetworkBandwidth) >> ) >> then >> insertLogical(new >> IntConstraintOccurrence("requiredNetworkBandwidth", >> ConstraintType.NEGATIVE_HARD, >> $requiredNetworkBandwidthTotal.intValue() - >> $networkBandwidth, >> $computer)); >> end >> >> rule "hardConstraintBroken" >> salience -1 >> when >> $hardTotal : Number() from accumulate( >> IntConstraintOccurrence(constraintType == >> ConstraintType.NEGATIVE_HARD, $weight : weight) >> sum($weight) >> ) >> then >> scoreHolder.setHardConstraintsBroken($hardTotal.intValue()); >> end >> >> >> // Soft constraint >> >> rule "computerCost" >> when >> $computer : CloudComputer($cost : cost) >> exists CloudProcess(computer == $computer) >> then >> insertLogical(new >> IntConstraintOccurrence("computerCost", >> ConstraintType.NEGATIVE_SOFT, >> $cost, >> $computer)); >> end >> >> rule "softConstraintBroken" >> salience -1 >> when >> $softTotal : Number() from accumulate( >> IntConstraintOccurrence(ConstraintType == >> ConstraintType.NEGATIVE_SOFT, $weight : weight) >> sum($weight) >> ) >> then >> scoreHolder.setHardConstraintsBroken($softTotal.intValue()); >> end >> >> >> 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com >> <mailto:ge0ffrey.spam@gmail.com>> >> >> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.defaultConsequence(Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.java:14) >> >> What's in the then side of Rule_requiredCpuPowerTotal ? >> >> Op 28-01-13 16:00, André Fróes schreef: >>> Even adding that, the error still >>> >>> -------------- >>> 12:57:41.050 [main] INFO >>> o.d.p.core.solver.DefaultSolver - Solving started: >>> time spend (152), score (null), new best score >>> (null), random seed (0). >>> Exception in thread "main" Exception executing >>> consequence for rule "requiredCpuPowerTotal" in >>> com.swa.planner.domain.rule: >>> java.lang.NullPointerException >>> at >>> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) >>> at >>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297) >>> at >>> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221) >>> at >>> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456) >>> at >>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710) >>> at >>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674) >>> at >>> org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177) >>> at >>> org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92) >>> at >>> org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82) >>> at >>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65) >>> at >>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) >>> at >>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) >>> at >>> com.swa.planner.domain.CloudTest.main(CloudTest.java:67) >>> Caused by: java.lang.NullPointerException >>> at java.lang.String.<init>(Unknown Source) >>> at >>> org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) >>> at >>> org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302) >>> at >>> org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) >>> at org.mvel2.MVEL.compileExpression(MVEL.java:810) >>> at >>> org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435) >>> at >>> org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238) >>> at >>> org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206) >>> at >>> org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190) >>> at >>> org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157) >>> at >>> org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) >>> at >>> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497) >>> at >>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382) >>> at >>> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235) >>> at >>> org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240) >>> at >>> org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350) >>> at >>> org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38) >>> at >>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204) >>> at >>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176) >>> at >>> org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231) >>> at >>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903) >>> at >>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245) >>> at >>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210) >>> at >>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205) >>> at >>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.defaultConsequence(Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.java:14) >>> at >>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvokerGenerated.evaluate(Unknown >>> Source) >>> at >>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvoker.evaluate(Unknown >>> Source) >>> at >>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287) >>> ... 14 more >>> >>> -------------- >>> >>> I added to cloudprocess computer variable: >>> -------------- >>> package com.swa.planner.domain; >>> >>> import >>> org.drools.planner.api.domain.entity.PlanningEntity; >>> import >>> org.drools.planner.api.domain.variable.PlanningVariable; >>> import >>> org.drools.planner.api.domain.variable.ValueRange; >>> import >>> org.drools.planner.api.domain.variable.ValueRangeType; >>> import >>> org.drools.planner.examples.common.domain.AbstractPersistable; >>> >>> @PlanningEntity(difficultyComparatorClass = >>> CloudProcessDifficultyComparator.class) >>> public class CloudProcess extends AbstractPersistable{ >>> >>> private int requiredCpuPower; >>> private int requiredMemory; >>> private int requiredNetworkBandwidth; >>> >>> private CloudComputer computer; >>> >>> public CloudProcess(long id, int requiredCpuPower, >>> int requiredMemory, >>> int requiredNetworkBandwidth) { >>> super(); >>> setId(id); >>> this.requiredCpuPower = requiredCpuPower; >>> this.requiredMemory = requiredMemory; >>> this.requiredNetworkBandwidth = >>> requiredNetworkBandwidth; >>> } >>> public CloudProcess() {} >>> >>> public int getRequiredCpuPower() { >>> return requiredCpuPower; >>> } >>> >>> public void setRequiredCpuPower(int requiredCpuPower) { >>> this.requiredCpuPower = requiredCpuPower; >>> } >>> >>> public int getRequiredMemory() { >>> return requiredMemory; >>> } >>> >>> public void setRequiredMemory(int requiredMemory) { >>> this.requiredMemory = requiredMemory; >>> } >>> >>> public int getRequiredNetworkBandwidth() { >>> return requiredNetworkBandwidth; >>> } >>> >>> public void setRequiredNetworkBandwidth(int >>> requiredNetworkBandwidth) { >>> this.requiredNetworkBandwidth = >>> requiredNetworkBandwidth; >>> } >>> >>> public String getLabel() { >>> return "Process " + id; >>> } >>> @PlanningVariable(strengthComparatorClass = >>> CloudComputerStrengthComparator.class) >>> @ValueRange(type = >>> ValueRangeType.FROM_SOLUTION_PROPERTY, >>> solutionProperty = "computerList") >>> public CloudComputer getComputer() { >>> if (computer == null) { return null; } >>> return computer; >>> } >>> >>> public void setComputer(CloudComputer computer) { >>> this.computer = computer; >>> } >>> public CloudProcess clone(){ >>> CloudProcess clone = new CloudProcess(); >>> clone.id <http://clone.id> = id; >>> clone.requiredCpuPower = requiredCpuPower; >>> clone.requiredMemory = requiredMemory; >>> clone.requiredNetworkBandwidth = >>> requiredNetworkBandwidth; >>> clone.computer = computer; >>> return clone; >>> } >>> public int getRequiredMultiplicand() { >>> return requiredCpuPower * requiredMemory * >>> requiredNetworkBandwidth; >>> } >>> } >>> -------------- >>> >>> this is what i'm doing to run the example: >>> >>> ------------- >>> package com.swa.planner.domain; >>> >>> import java.io.ByteArrayInputStream; >>> import java.util.ArrayList; >>> import java.util.List; >>> >>> import org.drools.planner.config.SolverFactory; >>> import org.drools.planner.config.XmlSolverFactory; >>> import org.drools.planner.core.Solver; >>> >>> public class CloudTest { >>> public static void main(String[] args) { >>> String t = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" >>> + "<solver>" >>> + " >>> <solutionClass>com.swa.planner.domain.CloudBalance</solutionClass>" >>> + " >>> <planningEntityClass>com.swa.planner.domain.CloudProcess</planningEntityClass>" >>> + " <scoreDirectorFactory>" >>> + " >>> <scoreDefinitionType>HARD_AND_SOFT</scoreDefinitionType>" >>> + " >>> <scoreDrl>/com/swa/planner/domain/rule/cloudBalancingScoreRules.drl</scoreDrl>" >>> + " </scoreDirectorFactory>" >>> + " <termination>" >>> + " <maximumSecondsSpend>120</maximumSecondsSpend>" >>> + " </termination>" >>> + " <constructionHeuristic>" >>> + " >>> <constructionHeuristicType>FIRST_FIT_DECREASING</constructionHeuristicType>" >>> + " >>> <constructionHeuristicPickEarlyType>FIRST_LAST_STEP_SCORE_EQUAL_OR_IMPROVING</constructionHeuristicPickEarlyType>" >>> + " </constructionHeuristic>" >>> + " <localSearch>" >>> + " <acceptor>" >>> + " >>> <planningEntityTabuSize>7</planningEntityTabuSize>" >>> + " </acceptor>" >>> + " <forager>" >>> + " >>> <minimalAcceptedSelection>1000</minimalAcceptedSelection>" >>> + " </forager>" >>> + " </localSearch>" >>> + "</solver>"; >>> >>> byte b[] = t.getBytes(); >>> ByteArrayInputStream bt = new ByteArrayInputStream(b); >>> SolverFactory solverFactory = new >>> XmlSolverFactory().configure(bt); >>> Solver solver = solverFactory.buildSolver(); >>> >>> List<CloudComputer> computerList = new >>> ArrayList<CloudComputer>(); >>> computerList.add(new CloudComputer(1L, "Computador >>> 1", 3, 2, 2, 110)); >>> computerList.add(new CloudComputer(2L, "Computador >>> 2", 12, 8, 3, 400)); >>> computerList.add(new CloudComputer(3L, "Computador >>> 3", 6, 6, 4, 300)); >>> computerList.add(new CloudComputer(4L, "Computador >>> 4", 18, 12, 8, 1000)); >>> computerList.add(new CloudComputer(5L, "Computador >>> 5", 8, 4, 6, 800)); >>> computerList.add(new CloudComputer(6L, "Computador >>> 6", 9, 7, 9, 1000)); >>> >>> List<CloudProcess> processList = new >>> ArrayList<CloudProcess>(); >>> processList.add(new CloudProcess(11L, 2, 2, 2)); >>> processList.add(new CloudProcess(12L, 4, 4, 2)); >>> processList.add(new CloudProcess(13L, 1, 1, 3)); >>> processList.add(new CloudProcess(14L, 7, 3, 5)); >>> processList.add(new CloudProcess(15L, 5, 8, 3)); >>> processList.add(new CloudProcess(16L, 9, 2, 2)); >>> processList.add(new CloudProcess(17L, 6, 5, 6)); >>> >>> CloudBalance cloudBalance = new CloudBalance(); >>> cloudBalance.setId(0L); >>> cloudBalance.setComputerList(computerList); >>> cloudBalance.setProcessList(processList); >>> >>> // Solve the problem >>> solver.setPlanningProblem(cloudBalance); >>> solver.solve(); >>> CloudBalance solvedCloudBalance = (CloudBalance) >>> solver.getBestSolution(); >>> >>> // Display the result >>> System.out.println("\nSolved cloudBalance with 5 >>> computers and 6 processes:\n" >>> + toDisplayString(solvedCloudBalance)); >>> } >>> >>> public static String toDisplayString(CloudBalance >>> cloudBalance) { >>> StringBuilder displayString = new StringBuilder(); >>> for (CloudProcess process : >>> cloudBalance.getProcessList()) { >>> CloudComputer computer = process.getComputer(); >>> displayString.append(" ").append(process.getLabel()) >>> .append(" -> ") >>> .append(computer == null ? null : computer.getLabel()) >>> .append("\n"); >>> } >>> return displayString.toString(); >>> } >>> } >>> >>> ------------- >>> >>> >>> 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com >>> <mailto:ge0ffrey.spam@gmail.com>> >>> >>> The value of a variable of an entity starts out >>> as null during construction heuristics, even if >>> it's not nullable. >>> >>> The usual trick is to add null safe getters: >>> >>> public class BedDesignation { >>> >>> // bed is planning variable >>> ... >>> public Departement getDepartment() { >>> if (bed == null) { return null;} >>> return bed.getRoom().getDepartement() >>> } >>> } >>> >>> >>> Op 28-01-13 15:13, André Fróes schreef: >>>> I've implemented it to see how it would work, >>>> now I got another error: >>>> >>>> --------------- >>>> >>>> 12:10:41.357 [main] INFO >>>> o.d.p.core.solver.DefaultSolver - Solving >>>> started: time spend (302), score (null), new >>>> best score (null), random seed (0). >>>> Exception in thread "main" Exception executing >>>> consequence for rule "requiredCpuPowerTotal" >>>> in com.swa.planner.domain.rule: >>>> java.lang.NullPointerException >>>> at >>>> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) >>>> at >>>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297) >>>> at >>>> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221) >>>> at >>>> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456) >>>> at >>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710) >>>> at >>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674) >>>> at >>>> org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177) >>>> at >>>> org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92) >>>> at >>>> org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65) >>>> at >>>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) >>>> at >>>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) >>>> at >>>> com.swa.planner.domain.CloudTest.main(CloudTest.java:65) >>>> Caused by: java.lang.NullPointerException >>>> at java.lang.String.<init>(Unknown Source) >>>> at >>>> org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) >>>> at >>>> org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302) >>>> at >>>> org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) >>>> at org.mvel2.MVEL.compileExpression(MVEL.java:810) >>>> at >>>> org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435) >>>> at >>>> org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238) >>>> at >>>> org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206) >>>> at >>>> org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190) >>>> at >>>> org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157) >>>> at >>>> org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) >>>> at >>>> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497) >>>> at >>>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382) >>>> at >>>> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235) >>>> at >>>> org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240) >>>> at >>>> org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350) >>>> at >>>> org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38) >>>> at >>>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204) >>>> at >>>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176) >>>> at >>>> org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231) >>>> at >>>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903) >>>> at >>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245) >>>> at >>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210) >>>> at >>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205) >>>> at >>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bd.defaultConsequence(Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bd.java:14) >>>> at >>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bdDefaultConsequenceInvokerGenerated.evaluate(Unknown >>>> Source) >>>> at >>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bdDefaultConsequenceInvoker.evaluate(Unknown >>>> Source) >>>> at >>>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287) >>>> ... 14 more >>>> >>>> ----------------- >>>> >>>> this one i have no clue >>>> >>>> >>>> 2013/1/28 André Fróes <arfmoraes(a)gmail.com >>>> <mailto:arfmoraes@gmail.com>> >>>> >>>> Hello there, i'm getting this error: >>>> >>>> ------------------- >>>> 11:26:50.394 [main] INFO >>>> o.d.p.core.solver.DefaultSolver - Solving >>>> started: time spend (187), score (null), >>>> new best score (null), random seed (0). >>>> Exception in thread "main" >>>> java.lang.IllegalStateException: The >>>> selectionOrder (DECREASING_DIFFICULTY) can >>>> not be used on a PlanningEntity >>>> (com.swa.planner.domain.CloudProcess) that >>>> has no support for difficulty sorting. >>>> Check the @PlanningEntity annotation. >>>> at >>>> org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.validate(PlanningEntitySelector.java:53) >>>> at >>>> org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.phaseStarted(PlanningEntitySelector.java:45) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.selector.GreedyPlanningEntitySelector.phaseStarted(GreedyPlanningEntitySelector.java:41) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.phaseStarted(DefaultGreedyFitSolverPhase.java:111) >>>> at >>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:57) >>>> at >>>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) >>>> at >>>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) >>>> at >>>> com.swa.planner.domain.CloudTest.main(CloudTest.java:51) >>>> ------------------------- >>>> >>>> I know why it is happening though (at >>>> least i think so), but will I have to >>>> implement the comparator to every planner >>>> I do or is there any other way to make it >>>> work? >>>> >>>> I'm reproducing the example from the >>>> guide, when it passes the drools rules it >>>> gives that message. I didn't implement >>>> CloudComputerStrengthComparator >>>> neither CloudProcessDifficultyComparator, >>>> will I have to implement those so this >>>> example works? >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> rules-users mailing list >>>> rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org> >>>> https://lists.jboss.org/mailman/listinfo/rules-users >>> >>> >>> _______________________________________________ >>> rules-users mailing list >>> rules-users(a)lists.jboss.org >>> <mailto:rules-users@lists.jboss.org> >>> https://lists.jboss.org/mailman/listinfo/rules-users >>> >>> >>> >>> >>> _______________________________________________ >>> rules-users mailing list >>> rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org> >>> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> <mailto:rules-users@lists.jboss.org> >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org> >> https://lists.jboss.org/mailman/listinfo/rules-users > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org> > https://lists.jboss.org/mailman/listinfo/rules-users > > > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org> > https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org <mailto:rules-users@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