corner.orm.hibernate.impl.SpringSessionManagerImpl.java Source code

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Here is the source code for corner.orm.hibernate.impl.SpringSessionManagerImpl.java

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/* 
 * Copyright 2009 The Corner Team.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package corner.orm.hibernate.impl;

import org.apache.tapestry5.hibernate.HibernateSessionManager;
import org.apache.tapestry5.hibernate.HibernateSessionSource;
import org.apache.tapestry5.ioc.services.ThreadCleanupListener;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.dao.DataAccessResourceFailureException;
import org.springframework.orm.hibernate3.SessionFactoryUtils;
import org.springframework.orm.hibernate3.SessionHolder;
import org.springframework.transaction.support.TransactionSynchronizationManager;

/**
 * Spring??sessionT5Session?
 * 
 * @author <a href="mailto:jun.tsai@gmail.com">Jun Tsai</a>
 * @version $Revision$
 * @since 0.1
 */
public class SpringSessionManagerImpl implements HibernateSessionManager, ThreadCleanupListener {

    private SessionFactory sessionFactory;
    private boolean participate;
    private static final Logger logger = LoggerFactory.getLogger(SpringSessionManagerImpl.class);

    public SpringSessionManagerImpl(HibernateSessionSource source) {
        sessionFactory = source.getSessionFactory();// single session mode
        if (TransactionSynchronizationManager.hasResource(sessionFactory)) {
            // Do not modify the Session: just set the participate flag.
            participate = true;
        } else {
            logger.debug("Opening single Hibernate Session in OpenSessionInViewFilter");
            Session session = getSession(sessionFactory);
            TransactionSynchronizationManager.bindResource(sessionFactory, new SessionHolder(session));
        }
    }

    /**
     * @see org.apache.tapestry5.hibernate.HibernateSessionManager#abort()
     */
    @Override
    public void abort() {
        throw new UnsupportedOperationException("never call ");
    }

    /**
     * @see org.apache.tapestry5.hibernate.HibernateSessionManager#commit()
     */
    @Override
    public void commit() {
        throw new UnsupportedOperationException("never call ");
    }

    /**
     * @see org.apache.tapestry5.hibernate.HibernateSessionManager#getSession()
     */
    @Override
    public Session getSession() {
        return SessionFactoryUtils.getSession(sessionFactory, false);
    }

    protected Session getSession(SessionFactory sessionFactory) throws DataAccessResourceFailureException {
        Session session = SessionFactoryUtils.getSession(sessionFactory, true);
        if (logger.isDebugEnabled()) {
            logger.debug("get session " + Integer.toHexString(session.hashCode()));
        }
        return session;
    }

    protected void closeSession(Session session, SessionFactory sessionFactory) {
        SessionFactoryUtils.closeSession(session);
    }

    @Override
    public void threadDidCleanup() {
        if (!participate) {
            // single session mode
            SessionHolder sessionHolder = (SessionHolder) TransactionSynchronizationManager
                    .unbindResource(sessionFactory);
            logger.debug("Closing single Hibernate Session in OpenSessionInViewFilter");
            closeSession(sessionHolder.getSession(), sessionFactory);
        }
    }
}