com.brienwheeler.lib.db.DbTestUtils.java Source code

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Here is the source code for com.brienwheeler.lib.db.DbTestUtils.java

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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2013 Brien L. Wheeler (brienwheeler@yahoo.com)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.brienwheeler.lib.db;

import java.util.concurrent.Callable;

import javax.persistence.EntityManagerFactory;

import org.springframework.context.ApplicationContext;
import org.springframework.orm.jpa.EntityManagerHolder;
import org.springframework.transaction.support.TransactionSynchronizationManager;

public class DbTestUtils {
    private DbTestUtils() {
    }

    public static <T> T doInHibernateSession(ApplicationContext applicationContext, Callable<T> work) {
        EntityManagerFactory entityManagerFactory = applicationContext
                .getBean("com.brienwheeler.lib.db.appEntityManagerFactory", EntityManagerFactory.class);

        EntityManagerHolder entityManagerHolder = (EntityManagerHolder) TransactionSynchronizationManager
                .getResource(entityManagerFactory);

        boolean created = entityManagerHolder == null;
        if (created) {
            entityManagerHolder = new EntityManagerHolder(entityManagerFactory.createEntityManager());
            TransactionSynchronizationManager.bindResource(entityManagerFactory, entityManagerHolder);
        }

        try {
            return work.call();
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            if (created)
                TransactionSynchronizationManager.unbindResource(entityManagerFactory);
        }
    }
}