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OptaPlanner solves planning problems. This lightweight, embeddable planning engine implements powerful and scalable algorithms to optimize business resource scheduling and planning. This module contains the examples which demonstrate how to use it in a normal Java application.
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package org.optaplanner.examples.common.app;

import java.awt.Component;
import java.io.File;
import java.util.Collections;
import java.util.Set;
import java.util.function.BiConsumer;

import javax.swing.WindowConstants;

import org.optaplanner.core.api.domain.solution.PlanningSolution;
import org.optaplanner.core.api.solver.SolverFactory;
import org.optaplanner.examples.common.business.SolutionBusiness;
import org.optaplanner.examples.common.persistence.AbstractSolutionExporter;
import org.optaplanner.examples.common.persistence.AbstractSolutionImporter;
import org.optaplanner.examples.common.swingui.SolutionPanel;
import org.optaplanner.examples.common.swingui.SolverAndPersistenceFrame;
import org.optaplanner.persistence.common.api.domain.solution.SolutionFileIO;
import org.optaplanner.swing.impl.SwingUncaughtExceptionHandler;
import org.optaplanner.swing.impl.SwingUtils;

/**
 * @param  the solution type, the class with the {@link PlanningSolution} annotation
 */
public abstract class CommonApp extends LoggingMain {

    /**
     * The path to the data directory, preferably with unix slashes for portability.
     * For example: -D{@value #DATA_DIR_SYSTEM_PROPERTY}=sources/data/
     */
    public static final String DATA_DIR_SYSTEM_PROPERTY = "org.optaplanner.examples.dataDir";

    public static File determineDataDir(String dataDirName) {
        String dataDirPath = System.getProperty(DATA_DIR_SYSTEM_PROPERTY, "data/");
        File dataDir = new File(dataDirPath, dataDirName);
        if (!dataDir.exists()) {
            throw new IllegalStateException("The directory dataDir (" + dataDir.getAbsolutePath()
                    + ") does not exist.\n" +
                    " Either the working directory should be set to the directory that contains the data directory" +
                    " (which is not the data directory itself), or the system property "
                    + DATA_DIR_SYSTEM_PROPERTY + " should be set properly.\n" +
                    " The data directory is different in a git clone (optaplanner/optaplanner-examples/data)" +
                    " and in a release zip (examples/sources/data).\n" +
                    " In an IDE (IntelliJ, Eclipse, VSCode), open the \"Run configuration\""
                    + " to change \"Working directory\" (or add the system property in \"VM options\").");
        }
        return dataDir;
    }

    /**
     * Some examples are not compatible with every native LookAndFeel.
     * For example, NurseRosteringPanel is incompatible with Mac.
     */
    public static void prepareSwingEnvironment() {
        SwingUncaughtExceptionHandler.register();
        SwingUtils.fixateLookAndFeel();
    }

    protected final String name;
    protected final String description;
    protected final String solverConfigResource;
    protected final String dataDirName;
    protected final String iconResource;

    protected SolverAndPersistenceFrame solverAndPersistenceFrame;
    protected SolutionBusiness solutionBusiness;

    protected CommonApp(String name, String description, String solverConfigResource, String dataDirName, String iconResource) {
        this.name = name;
        this.description = description;
        this.solverConfigResource = solverConfigResource;
        this.dataDirName = dataDirName;
        this.iconResource = iconResource;
    }

    public String getName() {
        return name;
    }

    public String getDescription() {
        return description;
    }

    public String getSolverConfigResource() {
        return solverConfigResource;
    }

    public String getDataDirName() {
        return dataDirName;
    }

    public String getIconResource() {
        return iconResource;
    }

    public void init() {
        init(null, true);
    }

    public void init(Component centerForComponent, boolean exitOnClose) {
        solutionBusiness = createSolutionBusiness();
        solverAndPersistenceFrame = new SolverAndPersistenceFrame<>(solutionBusiness, createSolutionPanel(),
                createExtraActions());
        solverAndPersistenceFrame
                .setDefaultCloseOperation(exitOnClose ? WindowConstants.EXIT_ON_CLOSE : WindowConstants.DISPOSE_ON_CLOSE);
        solverAndPersistenceFrame.init(centerForComponent);
        solverAndPersistenceFrame.setVisible(true);
    }

    public SolutionBusiness createSolutionBusiness() {
        SolutionBusiness solutionBusiness = new SolutionBusiness<>(this,
                SolverFactory.createFromXmlResource(solverConfigResource));
        solutionBusiness.setDataDir(determineDataDir(dataDirName));
        solutionBusiness.setSolutionFileIO(createSolutionFileIO());
        solutionBusiness.setImporters(createSolutionImporters());
        solutionBusiness.setExporters(createSolutionExporters());
        solutionBusiness.updateDataDirs();
        return solutionBusiness;
    }

    protected abstract SolutionPanel createSolutionPanel();

    protected ExtraAction[] createExtraActions() {
        return new ExtraAction[0];
    }

    /**
     * Used for the unsolved and solved directories,
     * not for the import and output directories, in the data directory.
     *
     * @return never null
     */
    public abstract SolutionFileIO createSolutionFileIO();

    protected Set> createSolutionImporters() {
        return Collections.emptySet();
    }

    protected Set> createSolutionExporters() {
        return Collections.emptySet();
    }

    public interface ExtraAction extends BiConsumer, SolutionPanel> {

        String getName();

    }

}