extensions/extras/src/test/java/org/apache/batchee/extras/util/MyProvider.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.batchee.extras.util;

import org.apache.batchee.extras.jpa.EntityManagerProvider;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

public class MyProvider implements EntityManagerProvider {
    private static EntityManagerFactory emf = null;

    @Override
    public EntityManager newEntityManager() {
        if (emf == null) {
            emf = Persistence.createEntityManagerFactory("test");
        }
        return emf.createEntityManager();
    }

    @Override
    public void release(final EntityManager em) {
        em.clear();
        em.close();
    }

    public void cleanup() {
        final EntityManager em = newEntityManager();
        em.getTransaction().begin();
        em.createQuery("DELETE FROM Person").executeUpdate();
        em.getTransaction().commit();
        release(em);
    }
}