Examples with CopyCollectionEventListener to.etc.domui.hibernate.beforeimages.CopyCollectionEventListener used on opensource projects

Example 1 with CopyCollectionEventListener

use of to.etc.domui.hibernate.beforeimages.CopyCollectionEventListener in project domui by fjalvingh.

the class HibernateConfigurator method initialize.

/*--------------------------------------------------------------*/
/*	CODING:	Main initialization entrypoints.					*/
/*--------------------------------------------------------------*/
/**
 * 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.
 */
public static synchronized void initialize(final DataSource ds) throws Exception {
    // Thanks to https://stackoverflow.com/questions/11639997/how-do-you-configure-logging-in-hibernate-4-to-use-slf4j
    System.setProperty("org.jboss.logging.provider", "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().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)
        // Take default from .developer.properties
        logsql = DeveloperOptions.getBool("hibernate.sql", false);
    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
		 */
    // MUST BE BEFORE config.configure
    serviceBuilder.applySetting("hibernate.id.new_generator_mappings", "true");
    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_interceptorFactory != null) {
        // -- We need the copy interceptor to handle these.
        hsm = dc -> {
            Interceptor interceptor = dc.getAttribute(Interceptor.class);
            // dc.setAttribute(Interceptor.class, interceptor);
            return m_sessionFactory.withOptions().interceptor(interceptor).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, HibernateConfigurator::onContextCreated);
    System.out.println("domui: Hibernate initialization took a whopping " + StringTool.strNanoTime(System.nanoTime() - ts));
}