public SubSingleBenchmarkRunner call()

in optaplanner-benchmark/src/main/java/org/optaplanner/benchmark/impl/SubSingleBenchmarkRunner.java [88:161]
67 lines of code
7 McCabe index (conditional complexity)

    public SubSingleBenchmarkRunner<Solution_> call() {
        MDC.put(NAME_MDC, subSingleBenchmarkResult.getName());
        Runtime runtime = Runtime.getRuntime();
        SingleBenchmarkResult singleBenchmarkResult = subSingleBenchmarkResult.getSingleBenchmarkResult();
        ProblemBenchmarkResult<Solution_> problemBenchmarkResult = singleBenchmarkResult
                .getProblemBenchmarkResult();
        Solution_ problem = problemBenchmarkResult.readProblem();
        if (!problemBenchmarkResult.getPlannerBenchmarkResult().hasMultipleParallelBenchmarks()) {
            runtime.gc();
            subSingleBenchmarkResult.setUsedMemoryAfterInputSolution(runtime.totalMemory() - runtime.freeMemory());
        }
        LOGGER.trace("Benchmark problem has been read for subSingleBenchmarkResult ({}).",
                subSingleBenchmarkResult);

        SolverConfig solverConfig = singleBenchmarkResult.getSolverBenchmarkResult()
                .getSolverConfig();
        if (singleBenchmarkResult.getSubSingleCount() > 1) {
            solverConfig = new SolverConfig(solverConfig);
            solverConfig.offerRandomSeedFromSubSingleIndex(subSingleBenchmarkResult.getSubSingleBenchmarkIndex());
        }
        Map<String, String> subSingleBenchmarkTagMap = new HashMap<>();
        String runId = UUID.randomUUID().toString();
        subSingleBenchmarkTagMap.put("optaplanner.benchmark.run", runId);
        solverConfig = new SolverConfig(solverConfig);
        randomSeed = solverConfig.getRandomSeed();
        // Defensive copy of solverConfig for every SingleBenchmarkResult to reset Random, tabu lists, ...
        DefaultSolverFactory<Solution_> solverFactory = new DefaultSolverFactory<>(new SolverConfig(solverConfig));
        DefaultSolver<Solution_> solver = (DefaultSolver<Solution_>) solverFactory.buildSolver();
        solver.setMonitorTagMap(subSingleBenchmarkTagMap);
        StatisticRegistry<Solution_> statisticRegistry = new StatisticRegistry<>(solver);
        Metrics.addRegistry(statisticRegistry);
        solver.addPhaseLifecycleListener(statisticRegistry);

        Tags runTag = Tags.of("optaplanner.benchmark.run", runId);
        for (SubSingleStatistic<Solution_, ?> subSingleStatistic : subSingleBenchmarkResult.getEffectiveSubSingleStatisticMap()
                .values()) {
            subSingleStatistic.open(statisticRegistry, runTag, solver);
            subSingleStatistic.initPointList();
        }
        Solution_ solution = solver.solve(problem);

        solver.removePhaseLifecycleListener(statisticRegistry);
        Metrics.removeRegistry(statisticRegistry);
        long timeMillisSpent = solver.getTimeMillisSpent();

        for (SubSingleStatistic<Solution_, ?> subSingleStatistic : subSingleBenchmarkResult.getEffectiveSubSingleStatisticMap()
                .values()) {
            subSingleStatistic.close(statisticRegistry, runTag, solver);
            subSingleStatistic.hibernatePointList();
        }
        if (!warmUp) {
            SolverScope<Solution_> solverScope = solver.getSolverScope();
            SolutionDescriptor<Solution_> solutionDescriptor = solverScope.getSolutionDescriptor();
            problemBenchmarkResult.registerScale(solutionDescriptor.getEntityCount(solution),
                    solutionDescriptor.getGenuineVariableCount(solution),
                    solutionDescriptor.getMaximumValueCount(solution),
                    solutionDescriptor.getProblemScale(solution));
            subSingleBenchmarkResult.setScore(solutionDescriptor.getScore(solution));
            subSingleBenchmarkResult.setTimeMillisSpent(timeMillisSpent);
            subSingleBenchmarkResult.setScoreCalculationCount(solverScope.getScoreCalculationCount());

            SolutionManager<Solution_, ?> solutionManager = SolutionManager.create(solverFactory);
            boolean isConstraintMatchEnabled = solver.getSolverScope().getScoreDirector().isConstraintMatchEnabled();
            if (isConstraintMatchEnabled) { // Easy calculator fails otherwise.
                ScoreExplanation<Solution_, ?> scoreExplanation =
                        solutionManager.explain(solution, SolutionUpdatePolicy.NO_UPDATE);
                subSingleBenchmarkResult.setScoreExplanationSummary(scoreExplanation.getSummary());
            }

            problemBenchmarkResult.writeSolution(subSingleBenchmarkResult, solution);
        }
        MDC.remove(NAME_MDC);
        return this;
    }