Java 类org.hibernate.service.UnknownServiceException 实例源码

/**
 * Determine the DataSource of the given SessionFactory.
 * @param sessionFactory the SessionFactory to check
 * @return the DataSource, or {@code null} if none found
 * @see ConnectionProvider
 */
public static DataSource getDataSource(SessionFactory sessionFactory) {
    if (sessionFactory instanceof SessionFactoryImplementor) {
        try {
            ConnectionProvider cp = ((SessionFactoryImplementor) sessionFactory).getServiceRegistry().getService(
                    ConnectionProvider.class);
            if (cp != null) {
                return cp.unwrap(DataSource.class);
            }
        }
        catch (UnknownServiceException ex) {
            if (logger.isDebugEnabled()) {
                logger.debug("No ConnectionProvider found - cannot determine DataSource for SessionFactory: " + ex);
            }
        }
    }
    return null;
}

private Object openSession() {
    LOG.debug("Openning new session for actual session factory, currently active open sessions: {}", currentOpenedSessions);
    Session realSession = this.realSessionFactory.openSession();
    currentOpenedSessions++;

    SessionObserver observer = null;
    try {
        observer = ((SessionFactoryImplementor) realSessionFactory).getServiceRegistry().getService(SessionObserver.class);
    } catch (UnknownServiceException e) {
        // Do nothing
    }

    SessionProxyHandler proxyHandler = new SessionProxyHandler(this.realSessionFactory, realSession, observer);
    Session proxy = (Session) Proxy.newProxyInstance(Session.class.getClassLoader(), new Class<?>[] { Session.class,
            SessionImplementor.class }, proxyHandler);

    if (observer != null) {
        observer.sessionCreated(proxy);
    }

    return proxy;

}

@Override
public <R extends Service> R getService(Class<R> serviceRole) {
    final ServiceBinding<R> serviceBinding = locateServiceBinding( serviceRole );
    if ( serviceBinding == null ) {
        throw new UnknownServiceException( serviceRole );
    }

    R service = serviceBinding.getService();
    if ( service == null ) {
        service = initializeService( serviceBinding );
    }

    return service;
}