[rules-users] Error selecting order decrease [planner]
André Fróes
arfmoraes at gmail.com
Mon Jan 28 10:00:43 EST 2013
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 at 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 at 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?
>>
>
>
>
> _______________________________________________
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>
>
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