Re: [rules-users] Error selecting order decrease [planner]

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;