Examples of org.drools.planner.core.solution.Solution

Package org.drools.planner.core.solution

Examples of org.drools.planner.core.solution.Solution

org.drools.planner.core.solution.Solution
A Solution represents a problem and a possible solution of that problem. A possible solution does not need to optimal or even feasible. A Solution does not even have to be initialized with a possible solution.
A Solution is mutable. Drools Planner will continuously modify the same solution for scalability reasons and clone it to recall the best solution.


    public void solvingStarted(AbstractSolverScope abstractSolverScope) {
        Score initialScore = abstractSolverScope.calculateScoreFromWorkingMemory();
        abstractSolverScope.setStartingScore(initialScore);
        abstractSolverScope.setBestSolutionStepIndex(-1);
        Solution newBestSolution = abstractSolverScope.getWorkingSolution().cloneSolution();
        abstractSolverScope.setBestSolution(newBestSolution);
        abstractSolverScope.setBestScore(initialScore);
        solverEventSupport.fireBestSolutionChanged(newBestSolution); // TODO if solution is initialized it should not fire an event
    }

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        Score bestScore = abstractSolverScope.getBestScore();
        boolean bestScoreImproved = newScore.compareTo(bestScore) > 0;
        abstractStepScope.setBestScoreImproved(bestScoreImproved);
        if (bestScoreImproved) {
            abstractSolverScope.setBestSolutionStepIndex(abstractStepScope.getStepIndex());
            Solution newBestSolution = abstractStepScope.createOrGetClonedSolution();
            abstractSolverScope.setBestSolution(newBestSolution);
            abstractSolverScope.setBestScore(newBestSolution.getScore());
            solverEventSupport.fireBestSolutionChanged(newBestSolution);
        }
    }

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        Map<File, SolverStatistic> unsolvedSolutionFileToStatisticMap = new LinkedHashMap<File, SolverStatistic>();
        for (SolverBenchmark solverBenchmark : solverBenchmarkList) {
            Solver solver = solverBenchmark.getLocalSearchSolverConfig().buildSolver();
            for (SolverBenchmarkResult result : solverBenchmark.getSolverBenchmarkResultList()) {
                File unsolvedSolutionFile = result.getUnsolvedSolutionFile();
                Solution unsolvedSolution = readUnsolvedSolution(xStream, unsolvedSolutionFile);
                solver.setStartingSolution(unsolvedSolution);
                if (solverStatisticType != SolverStatisticType.NONE) {
                    SolverStatistic statistic = unsolvedSolutionFileToStatisticMap.get(unsolvedSolutionFile);
                    if (statistic == null) {
                        statistic = solverStatisticType.create();
                        unsolvedSolutionFileToStatisticMap.put(unsolvedSolutionFile, statistic);
                    }
                    statistic.addListener(solver, solverBenchmark.getName());
                }
                solver.solve();
                result.setTimeMillisSpend(solver.getTimeMillisSpend());
                Solution solvedSolution = solver.getBestSolution();
                result.setScore(solvedSolution.getScore());
                if (solverStatisticType != SolverStatisticType.NONE) {
                    SolverStatistic statistic = unsolvedSolutionFileToStatisticMap.get(unsolvedSolutionFile);
                    statistic.removeListener(solver, solverBenchmark.getName());
                }
                writeSolvedSolution(xStream, solverBenchmark, result, solvedSolution);

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        }
        benchmarkingEnded(xStream, unsolvedSolutionFileToStatisticMap);
    }


    private Solution readUnsolvedSolution(XStream xStream, File unsolvedSolutionFile) {
        Solution unsolvedSolution;
        Reader reader = null;
        try {
            reader = new InputStreamReader(new FileInputStream(unsolvedSolutionFile), "utf-8");
            unsolvedSolution = (Solution) xStream.fromXML(reader);
        } catch (XStreamException e) {

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            bestScoreImproved = newScore.compareTo(bestScore) > 0;
        }
        stepScope.setBestScoreImproved(bestScoreImproved);
        if (bestScoreImproved) {
            phaseScope.setBestSolutionStepIndex(stepScope.getStepIndex());
            Solution newBestSolution = stepScope.createOrGetClonedSolution();
            updateBestSolution(solverScope, newBestSolution);
        } else if (assertBestScoreIsUnmodified) {
            solverScope.assertScore(solverScope.getBestSolution());
        }
    }

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                    "Your working dir should be drools-planner-examples and contain: " + inputDir);
        }
        Arrays.sort(inputFiles);
        for (File inputFile : inputFiles) {
            if (acceptInputFile(inputFile)) {
                Solution solution = readSolution(inputFile);
                String inputFileName = inputFile.getName();
                String outputFileName = inputFileName.substring(0,
                        inputFileName.length() - getInputFileSuffix().length())
                        + getOutputFileSuffix();
                File outputFile = new File(outputDir, outputFileName);

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            }
        });
    }


    public void bestSolutionChanged() {
        Solution solution = solutionBusiness.getSolution();
        if (refreshScreenDuringSolvingCheckBox.isSelected()) {
            solutionPanel.updatePanel(solution);
            validate(); // TODO remove me?
        }
        resultLabel.setText("Latest best score: " + solution.getScore());
    }

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            super("Solve");
        }


        public void actionPerformed(ActionEvent e) {
            setSolvingState(true);
            final Solution planningProblem = solutionBusiness.getSolution(); // In event thread
            // TODO This should be replaced with a java 6 SwingWorker once drools's hudson is on JDK 1.6
            solvingExecutor.submit(new Runnable() {
                public void run() {
                    Solution bestSolution;
                    try {
                        bestSolution = solutionBusiness.solve(planningProblem); // Not in event thread
                    } catch (final Throwable e) {
                        // Otherwise the newFixedThreadPool will eat the exception...
                        logger.error("Solving failed.", e);
                        bestSolution = null;
                    }
                    final Solution newSolution = bestSolution;
                    SwingUtilities.invokeLater(new Runnable() {
                        public void run() {
                            if (newSolution != null) {
                                solutionBusiness.setSolution(newSolution); // In event thread
                            }

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                // Avoid ConcurrentModificationException when there is an unprocessed ProblemFactChange
                // because the paint method uses the problem facts instances as the solver
                // unlike the planning entities which are cloned
                if (solver.isEveryProblemFactChangeProcessed()) {
                    // final is also needed for thread visibility
                    final Solution latestBestSolution = event.getNewBestSolution();
                    // Migrate it to the event thread
                    SwingUtilities.invokeLater(new Runnable() {
                        public void run() {
                            guiScoreDirector.setWorkingSolution(latestBestSolution);
                            solverAndPersistenceFrame.bestSolutionChanged();

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        Collections.sort(scoreDetailList);
        return scoreDetailList;
    }


    public void importSolution(File file) {
        Solution solution = importer.readSolution(file);
        guiScoreDirector.setWorkingSolution(solution);
    }

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Related Classes of org.drools.planner.core.solution.Solution

org.drools.planner.benchmark.core.ProblemBenchmark

org.drools.planner.benchmark.core.SingleBenchmark

org.drools.planner.benchmark.core.XStreamProblemIO

org.drools.planner.benchmark.SolverBenchmarkSuite

org.drools.planner.core.bestsolution.BestSolutionRecaller

org.drools.planner.core.localsearch.bestsolution.BestSolutionRecaller

org.drools.planner.core.move.generic.GenericChainedChangeMoveFactory

org.drools.planner.core.move.generic.GenericChainedChangePartMoveFactory

org.drools.planner.core.phase.AbstractSolverPhase

org.drools.planner.examples.common.app.SolverPerformanceTest

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