2.1/samples/expenses/src/main/java/com/google/gwt/sample/expenses/server/domain/EMF.java

/*
 * Copyright 2010 Google Inc.
 *
 * 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 com.google.gwt.sample.expenses.server.domain;

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

/**
 * Factory for creating EntityManager.
 */
public final class EMF {
    private static final EntityManagerFactory emfInstance =
        Persistence.createEntityManagerFactory("transactions-optional");

    public static EntityManagerFactory get() {
        return emfInstance;
    }

    private EMF() {
      // nothing 
    }
}