org.codehaus.groovy.grails.plugins.springsecurity.GrailsWebApplicationObjectSupport.java Source code

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Here is the source code for org.codehaus.groovy.grails.plugins.springsecurity.GrailsWebApplicationObjectSupport.java

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/* Copyright 2006-2007 the original author or authors.
 * 
 * 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 org.codehaus.groovy.grails.plugins.springsecurity;

import org.apache.log4j.Logger;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.orm.hibernate3.SessionFactoryUtils;
import org.springframework.orm.hibernate3.SessionHolder;
import org.springframework.transaction.support.TransactionSynchronizationManager;
import org.springframework.web.context.support.WebApplicationObjectSupport;

/**
 * Grails Web Application Object Support.
 *
 * @author T.Yamamoto
 * @author <a href='mailto:beckwithb@studentsonly.com'>Burt Beckwith</a>
 */
public abstract class GrailsWebApplicationObjectSupport extends WebApplicationObjectSupport {

    private final Logger logger = Logger.getLogger(getClass());

    /**
     * Holds the session created or existing session and a flag indicating whether it was
     * existing (so we know whether to close it or not).
     */
    public static class SessionContainer {
        private final Session _session;
        private final boolean _existingSession;

        private SessionContainer(final Session session, final boolean existingSession) {
            _session = session;
            _existingSession = existingSession;
        }

        /**
         * Get the session.
         * @return  the session
         */
        public Session getSession() {
            return _session;
        }
    }

    /**
     * Set up hibernate session.
     * @return  the session container, which holds the session and a boolean indicating if the session was pre-existing
     */
    protected SessionContainer setUpSession() {
        SessionFactory sessionFactory = getSessionFactory();

        Session session;
        boolean existing;
        if (TransactionSynchronizationManager.hasResource(sessionFactory)) {
            logger.debug("Session already has transaction attached");
            existing = true;
            session = ((SessionHolder) TransactionSynchronizationManager.getResource(sessionFactory)).getSession();
        } else {
            logger.debug("Session does not have transaction attached... Creating new one");
            existing = false;
            session = SessionFactoryUtils.getSession(sessionFactory, true);
            SessionHolder sessionHolder = new SessionHolder(session);
            TransactionSynchronizationManager.bindResource(sessionFactory, sessionHolder);
        }

        return new SessionContainer(session, existing);
    }

    /**
     * Release Session.
     */
    protected void releaseSession(final SessionContainer session) {
        if (session._existingSession) {
            return;
        }

        SessionFactory sessionFactory = getSessionFactory();
        SessionHolder sessionHolder = (SessionHolder) TransactionSynchronizationManager
                .unbindResource(sessionFactory);
        SessionFactoryUtils.releaseSession(sessionHolder.getSession(), sessionFactory);
        logger.debug("Session released");
    }

    private SessionFactory getSessionFactory() {
        return (SessionFactory) getWebApplicationContext().getBean("sessionFactory");
    }
}