Example usage for org.hibernate.event.spi EventType INIT_COLLECTION

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In this page you can find the example usage for org.hibernate.event.spi EventType INIT_COLLECTION.

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EventType INIT_COLLECTION

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Usage

From source file:to.etc.domui.hibernate.config.HibernateConfigurator.java

License:Open Source License

/**
 * Main worker to initialize the database layer, using Hibernate, with a user-specified core data source. This
 * code also enables SQL logging when .developer.properties option hibernate.sql=true.
 *///from   w  ww  .  j  av a2  s. com
public synchronized static void initialize(final DataSource ds) throws Exception {
    System.setProperty("org.jboss.logging.provider", "slf4j"); // Thanks to https://stackoverflow.com/questions/11639997/how-do-you-configure-logging-in-hibernate-4-to-use-slf4j
    if (m_sessionFactory != null)
        throw new IllegalStateException("HibernateConfigurator has already been initialized!");
    if (m_annotatedClassList.size() == 0)
        throw new IllegalStateException(
                "Please call addClasses(Class<?>...) and register your Hibernate data classes before calling me.");

    long ts = System.nanoTime();
    m_dataSource = ds;

    // see https://www.boraji.com/hibernate-5-event-listener-example

    //-- Create Hibernate's config. See https://docs.jboss.org/hibernate/orm/5.1/userguide/html_single/chapters/bootstrap/Bootstrap.html
    /*
     * Hibernate apparently cannot initialize without the useless hibernate.cfg.xml file. We cannot
     * add that file at the root location because that would interfere with applications. To have a
     * working model we add it as a resource in this class's package. And of course Hibernate makes
     * it hard to reach- we need to calculate the proper name, sigh.
     */
    BootstrapServiceRegistry bootstrapRegistry = new BootstrapServiceRegistryBuilder()
            .applyIntegrator(new JpaIntegrator()).build();

    String resname = "/" + HibernateConfigurator.class.getPackage().getName().replace('.', '/')
            + "/hibernate.cfg.xml";
    StandardServiceRegistryBuilder serviceBuilder = new StandardServiceRegistryBuilder(bootstrapRegistry)
            .configure(resname);

    /*
     * Set other properties according to config settings made.
     */
    serviceBuilder.applySetting("hibernate.connection.datasource", ds);
    boolean logsql;
    if (m_showSQL == null)
        logsql = DeveloperOptions.getBool("hibernate.sql", false); // Take default from .developer.properties
    else
        logsql = m_showSQL.booleanValue();

    if (logsql) {
        serviceBuilder.applySetting("show_sql", "true");
        serviceBuilder.applySetting("hibernate.show_sql", "true");
    }

    /*
     * Hibernate defaults to completely non-standard behavior for sequences, using the
     * "hilo" sequence generator by default. This irresponsible behavior means that
     * by default Hibernate code is incompatible with any code using sequences.
     * Since that is irresponsible and downright DUMB this reverts the behavior to
     * using sequences in their normal behavior.
     * See https://stackoverflow.com/questions/12745751/hibernate-sequencegenerator-and-allocationsize
     */
    serviceBuilder.applySetting("hibernate.id.new_generator_mappings", "true"); // MUST BE BEFORE config.configure

    m_hibernateOptions.forEach((option, value) -> serviceBuilder.applySetting(option, value));

    if (DeveloperOptions.getBool("hibernate.format_sql", true)) {
        serviceBuilder.applySetting("hibernate.format_sql", "true");
    }

    switch (m_mode) {
    default:
        throw new IllegalStateException("Mode: " + m_mode);
    case CREATE:
        serviceBuilder.applySetting("hbm2ddl.auto", "create");
        serviceBuilder.applySetting("hibernate.hbm2ddl.auto", "create");
        break;
    case NONE:
        serviceBuilder.applySetting("hbm2ddl.auto", "none");
        serviceBuilder.applySetting("hibernate.hbm2ddl.auto", "none");
        break;
    case UPDATE:
        serviceBuilder.applySetting("hbm2ddl.auto", "update");
        serviceBuilder.applySetting("hibernate.hbm2ddl.auto", "update");
        break;
    }

    // change settings
    for (IHibernateConfigListener listener : m_onConfigureList) {
        listener.onSettings(serviceBuilder);
    }

    ServiceRegistry reg = serviceBuilder.build();
    MetadataSources sources = new MetadataSources(reg);

    for (Class<?> clz : m_annotatedClassList)
        sources.addAnnotatedClass(clz);

    // add classes
    for (IHibernateConfigListener listener : m_onConfigureList) {
        listener.onAddSources(sources);
    }

    Metadata metaData = sources.getMetadataBuilder()
            .applyImplicitNamingStrategy(ImplicitNamingStrategyJpaCompliantImpl.INSTANCE).build();

    enhanceMappings(metaData);

    //for(Consumer<Configuration> listener : m_onConfigureList) {
    //   listener.accept(config);
    //}

    //-- Create the session factory: this completes the Hibernate config part.
    SessionFactoryBuilder sessionFactoryBuilder = metaData.getSessionFactoryBuilder();

    //      sessionFactoryBuilder.applyInterceptor( new CustomSessionFactoryInterceptor() );

    //sessionFactoryBuilder.addSessionFactoryObservers( new CustomSessionFactoryObserver() );

    // Apply a CDI BeanManager ( for JPA event listeners )
    //sessionFactoryBuilder.applyBeanManager( getBeanManager() );

    SessionFactoryImplementor sessionFactory = (SessionFactoryImplementor) sessionFactoryBuilder.build();
    m_sessionFactory = sessionFactory;

    EventListenerRegistry listenerRegistry = sessionFactory.getServiceRegistry()
            .getService(EventListenerRegistry.class);
    if (m_beforeImagesEnabled) {
        // https://docs.jboss.org/hibernate/orm/5.2/userguide/html_single/chapters/events/Events.html
        listenerRegistry.prependListeners(EventType.POST_LOAD, new CreateBeforeImagePostLoadListener());
        listenerRegistry.prependListeners(EventType.INIT_COLLECTION, new CopyCollectionEventListener());
    }
    for (IHibernateConfigListener listener : m_onConfigureList) {
        listener.onAddListeners(listenerRegistry);
    }

    //-- Start DomUI/WebApp.core initialization: generalized database layer
    HibernateSessionMaker hsm;
    if (m_beforeImagesEnabled) {
        //-- We need the copy interceptor to handle these.
        hsm = dc -> {
            return m_sessionFactory.withOptions().interceptor(new BeforeImageInterceptor(dc.getBeforeCache()))
                    .openSession();
            //return m_sessionFactory.openSession(new BeforeImageInterceptor(dc.getBeforeCache()));
        };
    } else {
        hsm = dc -> m_sessionFactory.openSession();
    }

    //-- If no handlers are registered: register the default ones.
    if (m_handlers.size() == 0) {
        m_handlers.register(JdbcQueryExecutor.FACTORY);
        m_handlers.register(HibernateQueryExecutor.FACTORY);
    }

    m_contextSource = new HibernateLongSessionContextFactory(m_listeners, hsm, m_handlers);
    System.out.println("domui: Hibernate initialization took a whopping "
            + StringTool.strNanoTime(System.nanoTime() - ts));
}

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