Example usage for org.hibernate ScrollMode FORWARD

Introduction

In this page you can find the example usage for org.hibernate ScrollMode FORWARD_ONLY.

Prototype

ScrollMode FORWARD_ONLY

To view the source code for org.hibernate ScrollMode FORWARD_ONLY.

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Document

Requests a scrollable result that is only scrollable forwards.

Usage

From source file:org.squashtest.tm.service.internal.advancedsearch.IndexationServiceImpl.java

License:Open Source License

private ScrollableResults getScrollableResults(FullTextSession ftSession, Class<?> entity,
        Collection<Long> ids) {
    Criteria query = ftSession.createCriteria(entity);
    query.add(Restrictions.in("id", ids));
    return query.scroll(ScrollMode.FORWARD_ONLY);
}

From source file:org.squashtest.tm.service.internal.repository.hibernate.HibernateMilestoneDao.java

License:Open Source License

private ScrollableResults scrollableResults(Query query) throws HibernateException {
    return query.setCacheMode(CacheMode.IGNORE).scroll(ScrollMode.FORWARD_ONLY);
}

From source file:org.wallride.service.SystemService.java

License:Apache License

@Async
@Transactional(propagation = Propagation.SUPPORTS)
public void reIndex() throws Exception {
    logger.info("Re-Index started");

    FullTextSession fullTextSession = Search.getFullTextSession((entityManager.unwrap(Session.class)));

    fullTextSession.setFlushMode(FlushMode.MANUAL);
    fullTextSession.setCacheMode(CacheMode.IGNORE);

    for (Class persistentClass : fullTextSession.getSearchFactory().getIndexedTypes()) {
        Transaction transaction = fullTextSession.beginTransaction();

        // Scrollable results will avoid loading too many objects in memory
        ScrollableResults results = fullTextSession.createCriteria(persistentClass).setFetchSize(BATCH_SIZE)
                .scroll(ScrollMode.FORWARD_ONLY);
        int index = 0;
        while (results.next()) {
            index++;//from   w w  w.j a  v a2 s. com
            fullTextSession.index(results.get(0)); //index each element
            if (index % BATCH_SIZE == 0) {
                fullTextSession.flushToIndexes(); //apply changes to indexes
                fullTextSession.clear(); //free memory since the queue is processed
            }
        }
        transaction.commit();
    }
    logger.info("Re-Index finished");
}

From source file:org.yes.cart.dao.impl.GenericDAOHibernateImpl.java

License:Apache License

/**
 * {@inheritDoc}//www  . j a  va  2 s . c  om
 */
public ResultsIterator<Object> findByQueryIterator(final String hsqlQuery, final Object... parameters) {
    Query query = sessionFactory.getCurrentSession().createQuery(hsqlQuery);
    if (parameters != null) {
        setQueryParameters(query, parameters);
    }
    return new ResultsIteratorImpl<Object>(query.scroll(ScrollMode.FORWARD_ONLY));
}

From source file:org.yes.cart.dao.impl.GenericDAOHibernateImpl.java

License:Apache License

/**
 * {@inheritDoc}//from ww  w .  j a  va2 s. co  m
 */
@SuppressWarnings("unchecked")
public ResultsIterator<T> findByNamedQueryIterator(final String namedQueryName, final Object... parameters) {
    Query query = sessionFactory.getCurrentSession().getNamedQuery(namedQueryName);
    if (parameters != null) {
        setQueryParameters(query, parameters);
    }
    return new ResultsIteratorImpl<T>(query.scroll(ScrollMode.FORWARD_ONLY));
}

From source file:org.yes.cart.dao.impl.GenericDAOHibernateImpl.java

License:Apache License

/**
 * {@inheritDoc}//from w ww .j av  a  2 s .com
 */
@SuppressWarnings("unchecked")
public ResultsIterator<Object> findQueryObjectByNamedQueryIterator(final String namedQueryName,
        final Object... parameters) {
    Query query = sessionFactory.getCurrentSession().getNamedQuery(namedQueryName);
    setQueryParameters(query, parameters);
    final ScrollableResults results = query.scroll(ScrollMode.FORWARD_ONLY);
    return new ResultsIteratorImpl<Object>(results);
}

From source file:org.yes.cart.dao.impl.GenericDAOHibernateImpl.java

License:Apache License

/**
 * {@inheritDoc}//w ww.  j a va  2  s  .c om
 */
public ResultsIterator<T> findAllIterator() {
    final Criteria crit = sessionFactory.getCurrentSession().createCriteria(getPersistentClass());
    final ScrollableResults results = crit.scroll(ScrollMode.FORWARD_ONLY);
    return new ResultsIteratorImpl<T>(results);
}

From source file:org.yes.cart.dao.impl.GenericDAOHibernateImpl.java

License:Apache License

private Runnable createIndexingRunnable(final boolean async, final int batchSize, final IndexFilter<T> filter) {
    return new Runnable() {
        @Override// w w  w  .j a v a 2  s . co m
        public void run() {
            int index = 0;
            final Logger log = LOGFTQ;
            try {

                if (persistentClassIndexble) {

                    currentIndexingCount.set(0);

                    if (log.isInfoEnabled()) {
                        log.info("Full reindex for {} class", persistentClass);
                    }
                    FullTextSession fullTextSession = Search.getFullTextSession(
                            async ? sessionFactory.openSession() : sessionFactory.getCurrentSession());
                    fullTextSession.setFlushMode(FlushMode.MANUAL);
                    fullTextSession.setCacheMode(CacheMode.IGNORE);
                    if (filter == null) { // only purge global full reindex because this clears all entries
                        fullTextSession.purgeAll(getPersistentClass());
                    }
                    ScrollableResults results = fullTextSession.createCriteria(persistentClass)
                            .setFetchSize(batchSize).scroll(ScrollMode.FORWARD_ONLY);

                    try {
                        while (results.next()) {

                            final T entity = (T) HibernateHelper.unproxy(results.get(0));

                            if (filter != null && filter.skipIndexing(entity)) {
                                continue; // skip this object
                            }

                            if (entityIndexingInterceptor != null) {
                                if (IndexingOverride.APPLY_DEFAULT == entityIndexingInterceptor
                                        .onUpdate(entity)) {
                                    fullTextSession.index(entity);
                                }
                            } else {
                                fullTextSession.index(entity);
                            }
                            index++;

                            if (index % batchSize == 0) {
                                fullTextSession.flushToIndexes(); //apply changes to indexes
                                fullTextSession.clear(); //clear since the queue is processed
                                if (log.isInfoEnabled()) {
                                    log.info("Indexed {} items of {} class", index, persistentClass);
                                }
                            }
                            currentIndexingCount.compareAndSet(index - 1, index);
                        }
                    } finally {
                        results.close();
                    }
                    fullTextSession.flushToIndexes(); //apply changes to indexes
                    fullTextSession.clear(); //clear since the queue is processed
                    if (log.isInfoEnabled()) {
                        log.info("Indexed {} items of {} class", index, persistentClass);
                    }
                    fullTextSession.getSearchFactory().optimize(getPersistentClass());
                }
            } catch (Exception exp) {
                LOGFTQ.error("Error during indexing", exp);
            } finally {
                asyncRunningState.set(COMPLETED);
                if (async) {
                    try {
                        if (persistentClassIndexble) {
                            sessionFactory.getCurrentSession().close();
                        }
                    } catch (Exception exp) {
                    }
                }
                if (log.isInfoEnabled()) {
                    log.info("Full reindex for {} class ... COMPLETED", persistentClass);
                }
            }
        }
    };
}

From source file:org.zanata.dao.HTextFlowTargetStreamingDAO.java

License:Open Source License

/**
 *
 * @return scrollable result set of HTextFlowTarget which has all
 *         fields(locale, textflow, document, document locale, project
 *         iteration and project) eagerly fetched.
 *//*ww w. j  a v a  2  s .co  m*/
public ScrollableResults getAllTargetsWithAllFieldsEagerlyFetched() {
    Query query = getSession().createQuery("from HTextFlowTarget tft " + "join fetch tft.locale "
            + "join fetch tft.textFlow " + "join fetch tft.textFlow.document "
            + "join fetch tft.textFlow.document.locale " + "join fetch tft.textFlow.document.projectIteration "
            + "join fetch tft.textFlow.document.projectIteration.project");
    query.setFetchSize(Integer.MIN_VALUE);
    return query.scroll(ScrollMode.FORWARD_ONLY);
}

From source file:org.zanata.dao.HTextFlowTargetStreamingDAO.java

License:Open Source License

/**
 *
 * @return scrollable result set of HTextFlowTarget under a project, with
 *         all of its fields(locale, textflow, document, document locale,
 *         project iteration and project) eagerly fetched.
 *///from ww w .  j a v a2s.  co m
public ScrollableResults getTargetsWithAllFieldsEagerlyFetchedForProject(HProject project) {
    Query query = getSession().createQuery("from HTextFlowTarget tft " + "join fetch tft.locale "
            + "join fetch tft.textFlow " + "join fetch tft.textFlow.document "
            + "join fetch tft.textFlow.document.locale " + "join fetch tft.textFlow.document.projectIteration "
            + "join fetch tft.textFlow.document.projectIteration.project p where p = :project");
    return query.setFetchSize(Integer.MIN_VALUE).setParameter("project", project)
            .scroll(ScrollMode.FORWARD_ONLY);
}

Example usage for org.hibernate ScrollMode FORWARD_ONLY

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