<div dir="ltr">Even adding that, the error still<div><br></div><div>--------------</div><div><div>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).</div>
<div>Exception in thread "main" Exception executing consequence for rule "requiredCpuPowerTotal" in com.swa.planner.domain.rule: java.lang.NullPointerException</div><div><span class="" style="white-space:pre"> </span>at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297)</div><div><span class="" style="white-space:pre"> </span>at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456)</div><div><span class="" style="white-space:pre"> </span>at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674)</div><div><span class="" style="white-space:pre"> </span>at org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92)</div><div><span class="" style="white-space:pre"> </span>at org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136)</div><div><span class="" style="white-space:pre"> </span>at org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82)</div><div><span class="" style="white-space:pre"> </span>at org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190)</div><div><span class="" style="white-space:pre"> </span>at org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155)</div>
<div><span class="" style="white-space:pre"> </span>at com.swa.planner.domain.CloudTest.main(CloudTest.java:67)</div><div>Caused by: java.lang.NullPointerException</div><div><span class="" style="white-space:pre"> </span>at java.lang.String.<init>(Unknown Source)</div>
<div><span class="" style="white-space:pre"> </span>at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12)</div><div><span class="" style="white-space:pre"> </span>at org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302)</div>
<div><span class="" style="white-space:pre"> </span>at org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62)</div><div><span class="" style="white-space:pre"> </span>at org.mvel2.MVEL.compileExpression(MVEL.java:810)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435)</div><div><span class="" style="white-space:pre"> </span>at org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206)</div><div><span class="" style="white-space:pre"> </span>at org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157)</div><div><span class="" style="white-space:pre"> </span>at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497)</div><div><span class="" style="white-space:pre"> </span>at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)</div><div><span class="" style="white-space:pre"> </span>at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350)</div><div><span class="" style="white-space:pre"> </span>at org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204)</div><div><span class="" style="white-space:pre"> </span>at org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231)</div><div><span class="" style="white-space:pre"> </span>at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245)</div><div><span class="" style="white-space:pre"> </span>at org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205)</div><div><span class="" style="white-space:pre"> </span>at com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.defaultConsequence(Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.java:14)</div>
<div><span class="" style="white-space:pre"> </span>at com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvokerGenerated.evaluate(Unknown Source)</div><div><span class="" style="white-space:pre"> </span>at com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvoker.evaluate(Unknown Source)</div>
<div><span class="" style="white-space:pre"> </span>at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287)</div><div><span class="" style="white-space:pre"> </span>... 14 more</div></div><div><br></div>
<div>--------------</div><div><br></div><div style>I added to cloudprocess computer variable:</div><div style>--------------</div><div style><div>package com.swa.planner.domain;</div><div><br></div><div>import org.drools.planner.api.domain.entity.PlanningEntity;</div>
<div>import org.drools.planner.api.domain.variable.PlanningVariable;</div><div>import org.drools.planner.api.domain.variable.ValueRange;</div><div>import org.drools.planner.api.domain.variable.ValueRangeType;</div><div>import org.drools.planner.examples.common.domain.AbstractPersistable;</div>
<div><br></div><div>@PlanningEntity(difficultyComparatorClass = CloudProcessDifficultyComparator.class)</div><div>public class CloudProcess extends AbstractPersistable{</div><div><br></div><div><span class="" style="white-space:pre"> </span>private int requiredCpuPower;</div>
<div><span class="" style="white-space:pre"> </span>private int requiredMemory;</div><div><span class="" style="white-space:pre"> </span>private int requiredNetworkBandwidth;</div><div><br></div><div><span class="" style="white-space:pre"> </span>private CloudComputer computer;</div>
<div><br></div><div><span class="" style="white-space:pre"> </span>public CloudProcess(long id, int requiredCpuPower, int requiredMemory,</div><div><span class="" style="white-space:pre"> </span>int requiredNetworkBandwidth) {</div>
<div><span class="" style="white-space:pre"> </span>super();</div><div><span class="" style="white-space:pre"> </span>setId(id);</div><div><span class="" style="white-space:pre"> </span>this.requiredCpuPower = requiredCpuPower;</div>
<div><span class="" style="white-space:pre"> </span>this.requiredMemory = requiredMemory;</div><div><span class="" style="white-space:pre"> </span>this.requiredNetworkBandwidth = requiredNetworkBandwidth;</div><div><span class="" style="white-space:pre"> </span>}</div>
<div><span class="" style="white-space:pre"> </span></div><div><span class="" style="white-space:pre"> </span>public CloudProcess() {<span class="" style="white-space:pre"> </span>}</div><div><br></div><div><span class="" style="white-space:pre"> </span>public int getRequiredCpuPower() {</div>
<div><span class="" style="white-space:pre"> </span>return requiredCpuPower;</div><div><span class="" style="white-space:pre"> </span>}</div><div><br></div><div><span class="" style="white-space:pre"> </span>public void setRequiredCpuPower(int requiredCpuPower) {</div>
<div><span class="" style="white-space:pre"> </span>this.requiredCpuPower = requiredCpuPower;</div><div><span class="" style="white-space:pre"> </span>}</div><div><br></div><div><span class="" style="white-space:pre"> </span>public int getRequiredMemory() {</div>
<div><span class="" style="white-space:pre"> </span>return requiredMemory;</div><div><span class="" style="white-space:pre"> </span>}</div><div><br></div><div><span class="" style="white-space:pre"> </span>public void setRequiredMemory(int requiredMemory) {</div>
<div><span class="" style="white-space:pre"> </span>this.requiredMemory = requiredMemory;</div><div><span class="" style="white-space:pre"> </span>}</div><div><br></div><div><span class="" style="white-space:pre"> </span>public int getRequiredNetworkBandwidth() {</div>
<div><span class="" style="white-space:pre"> </span>return requiredNetworkBandwidth;</div><div><span class="" style="white-space:pre"> </span>}</div><div><br></div><div><span class="" style="white-space:pre"> </span>public void setRequiredNetworkBandwidth(int requiredNetworkBandwidth) {</div>
<div><span class="" style="white-space:pre"> </span>this.requiredNetworkBandwidth = requiredNetworkBandwidth;</div><div><span class="" style="white-space:pre"> </span>}</div><div><br></div><div><span class="" style="white-space:pre"> </span>public String getLabel() {</div>
<div> return "Process " + id;</div><div> }</div><div><span class="" style="white-space:pre"> </span></div><div><span class="" style="white-space:pre"> </span>@PlanningVariable(strengthComparatorClass = CloudComputerStrengthComparator.class)</div>
<div><span class="" style="white-space:pre"> </span>@ValueRange(type = ValueRangeType.FROM_SOLUTION_PROPERTY, solutionProperty = "computerList")</div><div><span class="" style="white-space:pre"> </span>public CloudComputer getComputer() {</div>
<div><span class="" style="white-space:pre"> </span>if (computer == null) { return null; }</div><div><span class="" style="white-space:pre"> </span>return computer;</div><div><span class="" style="white-space:pre"> </span>}</div>
<div><br></div><div><span class="" style="white-space:pre"> </span>public void setComputer(CloudComputer computer) {</div><div><span class="" style="white-space:pre"> </span>this.computer = computer;</div><div><span class="" style="white-space:pre"> </span>}</div>
<div><span class="" style="white-space:pre"> </span></div><div><span class="" style="white-space:pre"> </span>public CloudProcess clone(){</div><div><span class="" style="white-space:pre"> </span>CloudProcess clone = new CloudProcess();</div>
<div><span class="" style="white-space:pre"> </span><a href="http://clone.id">clone.id</a> = id;</div><div><span class="" style="white-space:pre"> </span>clone.requiredCpuPower = requiredCpuPower;</div><div><span class="" style="white-space:pre"> </span>clone.requiredMemory = requiredMemory;</div>
<div><span class="" style="white-space:pre"> </span>clone.requiredNetworkBandwidth = requiredNetworkBandwidth;</div><div><span class="" style="white-space:pre"> </span>clone.computer = computer;</div><div><span class="" style="white-space:pre"> </span>return clone;</div>
<div><span class="" style="white-space:pre"> </span>}</div><div><span class="" style="white-space:pre"> </span></div><div><span class="" style="white-space:pre"> </span>public int getRequiredMultiplicand() {</div><div> return requiredCpuPower * requiredMemory * requiredNetworkBandwidth;</div>
<div> }</div><div>}</div><div>--------------<br></div><div><br></div><div style>this is what i'm doing to run the example:</div><div style><br></div><div style>-------------</div><div style><div>package com.swa.planner.domain;</div>
<div><br></div><div>import java.io.ByteArrayInputStream;</div><div>import java.util.ArrayList;</div><div>import java.util.List;</div><div><br></div><div>import org.drools.planner.config.SolverFactory;</div><div>import org.drools.planner.config.XmlSolverFactory;</div>
<div>import org.drools.planner.core.Solver;</div><div><br></div><div>public class CloudTest {</div><div><span class="" style="white-space:pre"> </span>public static void main(String[] args) {</div><div><span class="" style="white-space:pre"> </span>String t = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"</div>
<div><span class="" style="white-space:pre"> </span>+ "<solver>"</div><div><span class="" style="white-space:pre"> </span>+ " <solutionClass>com.swa.planner.domain.CloudBalance</solutionClass>"</div>
<div><span class="" style="white-space:pre"> </span>+ " <planningEntityClass>com.swa.planner.domain.CloudProcess</planningEntityClass>"</div><div><span class="" style="white-space:pre"> </span>+ " <scoreDirectorFactory>"</div>
<div><span class="" style="white-space:pre"> </span>+ " <scoreDefinitionType>HARD_AND_SOFT</scoreDefinitionType>"</div><div><span class="" style="white-space:pre"> </span>+ " <scoreDrl>/com/swa/planner/domain/rule/cloudBalancingScoreRules.drl</scoreDrl>"</div>
<div><span class="" style="white-space:pre"> </span>+ " </scoreDirectorFactory>"</div><div><span class="" style="white-space:pre"> </span>+ " <termination>"</div><div><span class="" style="white-space:pre"> </span>+ " <maximumSecondsSpend>120</maximumSecondsSpend>"</div>
<div><span class="" style="white-space:pre"> </span>+ " </termination>"</div><div><span class="" style="white-space:pre"> </span>+ " <constructionHeuristic>"</div><div><span class="" style="white-space:pre"> </span>+ " <constructionHeuristicType>FIRST_FIT_DECREASING</constructionHeuristicType>"</div>
<div><span class="" style="white-space:pre"> </span>+ " <constructionHeuristicPickEarlyType>FIRST_LAST_STEP_SCORE_EQUAL_OR_IMPROVING</constructionHeuristicPickEarlyType>"</div><div><span class="" style="white-space:pre"> </span>+ " </constructionHeuristic>"</div>
<div><span class="" style="white-space:pre"> </span>+ " <localSearch>"</div><div><span class="" style="white-space:pre"> </span>+ " <acceptor>"</div><div><span class="" style="white-space:pre"> </span>+ " <planningEntityTabuSize>7</planningEntityTabuSize>"</div>
<div><span class="" style="white-space:pre"> </span>+ " </acceptor>"</div><div><span class="" style="white-space:pre"> </span>+ " <forager>"</div><div><span class="" style="white-space:pre"> </span>+ " <minimalAcceptedSelection>1000</minimalAcceptedSelection>"</div>
<div><span class="" style="white-space:pre"> </span>+ " </forager>" </div><div><span class="" style="white-space:pre"> </span>+ " </localSearch>" </div><div><span class="" style="white-space:pre"> </span>+ "</solver>";</div>
<div><br></div><div><span class="" style="white-space:pre"> </span>byte b[] = t.getBytes();</div><div><span class="" style="white-space:pre"> </span>ByteArrayInputStream bt = new ByteArrayInputStream(b);</div><div><span class="" style="white-space:pre"> </span>SolverFactory solverFactory = new XmlSolverFactory().configure(bt);</div>
<div><span class="" style="white-space:pre"> </span>Solver solver = solverFactory.buildSolver();</div><div><br></div><div><span class="" style="white-space:pre"> </span>List<CloudComputer> computerList = new ArrayList<CloudComputer>();</div>
<div><span class="" style="white-space:pre"> </span>computerList.add(new CloudComputer(1L, "Computador 1", 3, 2, 2, 110));</div><div><span class="" style="white-space:pre"> </span>computerList.add(new CloudComputer(2L, "Computador 2", 12, 8, 3, 400));</div>
<div><span class="" style="white-space:pre"> </span>computerList.add(new CloudComputer(3L, "Computador 3", 6, 6, 4, 300));</div><div><span class="" style="white-space:pre"> </span>computerList.add(new CloudComputer(4L, "Computador 4", 18, 12, 8, 1000));</div>
<div><span class="" style="white-space:pre"> </span>computerList.add(new CloudComputer(5L, "Computador 5", 8, 4, 6, 800));</div><div><span class="" style="white-space:pre"> </span>computerList.add(new CloudComputer(6L, "Computador 6", 9, 7, 9, 1000));</div>
<div><br></div><div><span class="" style="white-space:pre"> </span>List<CloudProcess> processList = new ArrayList<CloudProcess>();</div><div><span class="" style="white-space:pre"> </span>processList.add(new CloudProcess(11L, 2, 2, 2));</div>
<div><span class="" style="white-space:pre"> </span>processList.add(new CloudProcess(12L, 4, 4, 2));</div><div><span class="" style="white-space:pre"> </span>processList.add(new CloudProcess(13L, 1, 1, 3));</div><div><span class="" style="white-space:pre"> </span>processList.add(new CloudProcess(14L, 7, 3, 5));</div>
<div><span class="" style="white-space:pre"> </span>processList.add(new CloudProcess(15L, 5, 8, 3));</div><div><span class="" style="white-space:pre"> </span>processList.add(new CloudProcess(16L, 9, 2, 2));</div><div><span class="" style="white-space:pre"> </span>processList.add(new CloudProcess(17L, 6, 5, 6));</div>
<div><br></div><div><span class="" style="white-space:pre"> </span>CloudBalance cloudBalance = new CloudBalance();</div><div><span class="" style="white-space:pre"> </span>cloudBalance.setId(0L);</div><div><span class="" style="white-space:pre"> </span>cloudBalance.setComputerList(computerList);</div>
<div><span class="" style="white-space:pre"> </span>cloudBalance.setProcessList(processList);</div><div><br></div><div><span class="" style="white-space:pre"> </span>// Solve the problem</div><div><span class="" style="white-space:pre"> </span>solver.setPlanningProblem(cloudBalance);</div>
<div><span class="" style="white-space:pre"> </span>solver.solve();</div><div><span class="" style="white-space:pre"> </span>CloudBalance solvedCloudBalance = (CloudBalance) solver.getBestSolution();</div><div><br></div>
<div><span class="" style="white-space:pre"> </span>// Display the result</div><div><span class="" style="white-space:pre"> </span>System.out.println("\nSolved cloudBalance with 5 computers and 6 processes:\n"</div>
<div><span class="" style="white-space:pre"> </span>+ toDisplayString(solvedCloudBalance));</div><div><span class="" style="white-space:pre"> </span>}</div><div><br></div><div><span class="" style="white-space:pre"> </span>public static String toDisplayString(CloudBalance cloudBalance) {</div>
<div><span class="" style="white-space:pre"> </span>StringBuilder displayString = new StringBuilder();</div><div><span class="" style="white-space:pre"> </span>for (CloudProcess process : cloudBalance.getProcessList()) {</div>
<div><span class="" style="white-space:pre"> </span>CloudComputer computer = process.getComputer();</div><div><span class="" style="white-space:pre"> </span>displayString.append(" ").append(process.getLabel())</div>
<div><span class="" style="white-space:pre"> </span>.append(" -> ")</div><div><span class="" style="white-space:pre"> </span>.append(computer == null ? null : computer.getLabel())</div><div><span class="" style="white-space:pre"> </span>.append("\n");</div>
<div><span class="" style="white-space:pre"> </span>}</div><div><span class="" style="white-space:pre"> </span>return displayString.toString();</div><div><span class="" style="white-space:pre"> </span>}</div><div>}</div>
<div><br></div></div><div style>-------------</div></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/1/28 Geoffrey De Smet <span dir="ltr"><<a href="mailto:ge0ffrey.spam@gmail.com" target="_blank">ge0ffrey.spam@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
The value of a variable of an entity starts out as null during
construction heuristics, even if it's not nullable.<br>
<br>
The usual trick is to add null safe getters:<br>
<br>
public class BedDesignation {<br>
<br>
// bed is planning variable<br>
...<br>
public Departement getDepartment() {<br>
if (bed == null) { return null;}<br>
return bed.getRoom().getDepartement()<br>
}<br>
}<br>
<br>
<br>
<div>Op 28-01-13 15:13, André Fróes schreef:<br>
</div>
<blockquote type="cite">
<div dir="ltr">I've implemented it to see how it would work, now I
got another error:
<div><br>
</div>
<div>---------------</div>
<div><br>
</div>
<div>
<div>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).</div>
<div>Exception in thread "main" Exception executing
consequence for rule "requiredCpuPowerTotal" in
com.swa.planner.domain.rule: java.lang.NullPointerException</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155)</div>
<div><span style="white-space:pre-wrap"> </span>at
com.swa.planner.domain.CloudTest.main(CloudTest.java:65)</div>
<div>Caused by: java.lang.NullPointerException</div>
<div><span style="white-space:pre-wrap"> </span>at
java.lang.String.<init>(Unknown Source)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.mvel2.MVEL.compileExpression(MVEL.java:810)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205)</div>
<div><span style="white-space:pre-wrap"> </span>at
com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bd.defaultConsequence(Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bd.java:14)</div>
<div><span style="white-space:pre-wrap"> </span>at
com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bdDefaultConsequenceInvokerGenerated.evaluate(Unknown
Source)</div>
<div><span style="white-space:pre-wrap"> </span>at
com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bdDefaultConsequenceInvoker.evaluate(Unknown
Source)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287)</div>
<div><span style="white-space:pre-wrap"> </span>... 14
more</div>
</div>
<div><br>
</div>
<div>-----------------</div>
<div><br>
</div>
<div>this one i have no clue </div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">2013/1/28 André Fróes <span dir="ltr"><<a href="mailto:arfmoraes@gmail.com" target="_blank">arfmoraes@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>Hello there, i'm getting this error:</div>
<div><br>
</div>
<div>-------------------</div>
<div>
<div>
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).</div>
<div>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.</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.validate(PlanningEntitySelector.java:53)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.phaseStarted(PlanningEntitySelector.java:45)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.constructionheuristic.greedyFit.selector.GreedyPlanningEntitySelector.phaseStarted(GreedyPlanningEntitySelector.java:41)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.phaseStarted(DefaultGreedyFitSolverPhase.java:111)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:57)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190)</div>
<div><span style="white-space:pre-wrap"> </span>at
org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155)</div>
<div><span style="white-space:pre-wrap"> </span>at
com.swa.planner.domain.CloudTest.main(CloudTest.java:51)</div>
<div>-------------------------</div>
<div><br>
</div>
<div>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?</div>
<div><br>
</div>
<div>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?</div>
</div>
</div>
</blockquote>
</div>
<br>
</div>
<br>
<fieldset></fieldset>
<br>
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</pre>
</blockquote>
<br>
</div>
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