SolverConfigFactory.java

package com.glaucoma.app;

import ai.timefold.solver.core.config.solver.SolverConfig;
import ai.timefold.solver.core.config.solver.termination.TerminationConfig;
import ai.timefold.solver.core.config.constructionheuristic.ConstructionHeuristicPhaseConfig;
import ai.timefold.solver.core.config.constructionheuristic.ConstructionHeuristicType;
import ai.timefold.solver.core.config.localsearch.LocalSearchPhaseConfig;
import ai.timefold.solver.core.api.solver.Solver;
import ai.timefold.solver.core.api.solver.SolverFactory;
import ai.timefold.solver.core.config.score.director.ScoreDirectorFactoryConfig;
import com.glaucoma.domain.Appointment;
import com.glaucoma.domain.GlaucomaSchedule;
import com.glaucoma.solver.GlaucomaConstraintProvider;

/**
 * Construye el motor de optimización (solver) de Timefold con la configuración
 * de fases y restricciones usada por la aplicación.
 */
public class SolverConfigFactory {

  /**
   * Configura y construye el solver de Timefold.
   *
   * @param maxTime tiempo máximo de ejecución del solver, en minutos
   * @return el solver listo para resolver un {@link GlaucomaSchedule}
   */
  public Solver<GlaucomaSchedule> configureSolver(long maxTime) {
    // Fase de construcción rápida - Agregamos esto para que la construcción de las citas iniciales no consuma todo el tiempo
    ConstructionHeuristicPhaseConfig constructionPhase = new ConstructionHeuristicPhaseConfig()
        .withConstructionHeuristicType(ConstructionHeuristicType.FIRST_FIT);

    // Fase de búsqueda local
    // Tenemos que instanciarlo, ya que al configurar la fase de construcción esta desaparece
    // Al inicializarla vacía, el solver usará su algoritmo por defecto: Late Acceptance
    LocalSearchPhaseConfig localSearchPhase = new LocalSearchPhaseConfig();

    ScoreDirectorFactoryConfig scoreConfig = new ScoreDirectorFactoryConfig()
        .withConstraintProviderClass(GlaucomaConstraintProvider.class)
        .withInitializingScoreTrend("ONLY_DOWN/ONLY_DOWN");

    // Configuración general del solver
    SolverConfig solverConfig = new SolverConfig()
        .withSolutionClass(GlaucomaSchedule.class)
        .withEntityClasses(Appointment.class)
        .withScoreDirectorFactory(scoreConfig)
        .withTerminationConfig(new TerminationConfig().withMinutesSpentLimit(maxTime))
        .withPhases(constructionPhase, localSearchPhase);
    return SolverFactory.<GlaucomaSchedule>create(solverConfig).buildSolver();
  }
}