Package org.optaplanner.core.api.solver

Examples of org.optaplanner.core.api.solver.Solver

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        }
        logger.trace("Benchmark inputSolution has been read for singleBenchmarkResult ({}).",
                singleBenchmarkResult.getName());

        // Intentionally create a fresh solver for every SingleBenchmarkResult to reset Random, tabu lists, ...
        Solver solver = singleBenchmarkResult.getSolverBenchmarkResult().getSolverConfig().buildSolver();

        for (SingleStatistic singleStatistic : singleBenchmarkResult.getEffectiveSingleStatisticMap().values()) {
            singleStatistic.open(solver);
        }

        solver.solve(inputSolution);
        long timeMillisSpent = solver.getTimeMillisSpent();
        Solution outputSolution = solver.getBestSolution();

        DefaultSolverScope solverScope = ((DefaultSolver) solver).getSolverScope();
        SolutionDescriptor solutionDescriptor = solverScope.getSolutionDescriptor();
        problemBenchmarkResult.registerScale(solutionDescriptor.getEntityCount(outputSolution),
                solutionDescriptor.getVariableCount(outputSolution),
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    private Queue<CloudProcess> notYetAddedProcessQueue = new LinkedList<CloudProcess>();

    @Test(timeout = 600000)
    public void daemon() throws InterruptedException { // In main thread
        Solver solver = buildSolver();
        CloudBalance cloudBalance = buildPlanningProblem();
        SolverThread solverThread = new SolverThread(solver, cloudBalance);
        solverThread.start();
        // Wait for the solver thread to start up
        waitForNextStage();

        // Give the solver thread a chance to terminate and get into the daemon waiting state
        Thread.sleep(500);
        for (int i = 0; i < 8; i++) {
            CloudProcess process = notYetAddedProcessQueue.poll();
            solver.addProblemFactChange(new AddProcessChange(process));
        }
        // Wait until those AddProcessChanges are processed
        waitForNextStage();

        // Give the solver thread some time to solve, terminate and get into the daemon waiting state
        Thread.sleep(1000);
        while (!notYetAddedProcessQueue.isEmpty()) {
            CloudProcess process = notYetAddedProcessQueue.poll();
            solver.addProblemFactChange(new AddProcessChange(process));
        }
        // Wait until those AddProcessChanges are processed
        waitForNextStage();

        solver.terminateEarly();
        try {
            // Wait until the solver thread dies.
            solverThread.join();
        } catch (InterruptedException e) {
            throw new IllegalStateException("SolverThread did not die.", e);
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        runSpeedTest(unsolvedDataFile, bestScoreLimitString, EnvironmentMode.REPRODUCIBLE);
    }

    protected void runSpeedTest(File unsolvedDataFile, String bestScoreLimitString, EnvironmentMode environmentMode) {
        SolverFactory solverFactory = buildSolverFactory(bestScoreLimitString, environmentMode);
        Solver solver = solve(solverFactory, unsolvedDataFile);
        assertBestSolution(solver, bestScoreLimitString);
    }
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        return solverFactory;
    }

    private Solver solve(SolverFactory solverFactory, File unsolvedDataFile) {
        Solution planningProblem = solutionDao.readSolution(unsolvedDataFile);
        Solver solver = solverFactory.buildSolver();
        solver.solve(planningProblem);
        return solver;
    }
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            ScoreDirectorFactoryConfig assertionScoreDirectorFactoryConfig = new ScoreDirectorFactoryConfig();
            assertionScoreDirectorFactoryConfig.setEasyScoreCalculatorClass(easyScoreCalculatorClass);
            solverConfig.getScoreDirectorFactoryConfig().setAssertionScoreDirectorFactory(
                    assertionScoreDirectorFactoryConfig);
        }
        Solver solver = solverFactory.buildSolver();
        solver.solve(planningProblem);
        Solution bestSolution = solver.getBestSolution();
        if (bestSolution == null) {
            // Solver didn't make it past initialization // TODO remove me once getBestSolution() never returns null
            bestSolution = planningProblem;
        }
        return bestSolution;
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    @Test(timeout = 600000)
    public void runPhase() {
        SolverFactory solverFactory = buildSolverFactory();
        Solution planningProblem = readPlanningProblem();
        Solver solver = solverFactory.buildSolver();

        solver.solve(planningProblem);
        Solution bestSolution = solver.getBestSolution();
        assertSolution(bestSolution);
    }
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    public static void main(String[] args) {
        // Build the Solver
        SolverFactory solverFactory = SolverFactory.createFromXmlResource(
                "org/optaplanner/examples/nqueens/solver/nqueensSolverConfig.xml");
        Solver solver = solverFactory.buildSolver();

        // Load a problem with 8 queens
        NQueens unsolved8Queens = new NQueensGenerator().createNQueens(8);

        // Solve the problem
        solver.solve(unsolved8Queens);
        NQueens solved8Queens = (NQueens) solver.getBestSolution();

        // Display the result
        System.out.println("\nSolved 8 queens:\n" + toDisplayString(solved8Queens));
    }
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    public static void main(String[] args) {
        // Build the Solver
        SolverFactory solverFactory = SolverFactory.createFromXmlResource(
                "org/optaplanner/examples/cloudbalancing/solver/cloudBalancingSolverConfig.xml");
        Solver solver = solverFactory.buildSolver();

        // Load a problem with 400 computers and 1200 processes
        CloudBalance unsolvedCloudBalance = new CloudBalancingGenerator().createCloudBalance(400, 1200);

        // Solve the problem
        solver.solve(unsolvedCloudBalance);
        CloudBalance solvedCloudBalance = (CloudBalance) solver.getBestSolution();

        // Display the result
        System.out.println("\nSolved cloudBalance with 400 computers and 1200 processes:\n"
                + toDisplayString(solvedCloudBalance));
    }
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Related Classes of org.optaplanner.core.api.solver.Solver

  • org.apache.camel.component.optaplanner.OptaPlannerEndpoint
  • org.optaplanner.benchmark.impl.result.ProblemBenchmarkResult
  • org.optaplanner.benchmark.impl.SingleBenchmarkRunner
  • org.optaplanner.examples.cloudbalancing.app.CloudBalancingDaemonTest
  • org.optaplanner.examples.cloudbalancing.app.CloudBalancingHelloWorld
  • org.optaplanner.examples.common.app.PhaseTest
  • org.optaplanner.examples.common.app.SolveAllTurtleTest
  • org.optaplanner.examples.common.app.SolverPerformanceTest
  • org.optaplanner.examples.nqueens.app.NQueensAppTest
  • org.optaplanner.examples.nqueens.app.NQueensHelloWorld
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