PersistenceEnv.java

/**
 *  Copyright 2009, 2010 The Regents of the University of California
 *  Licensed under the Educational Community 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.osedu.org/licenses/ECL-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 ch.entwine.weblounge.bridge.oaipmh.util;

import org.opencastproject.util.data.Function;

import javax.persistence.EntityManager;

/**
 * Persistence environment to perform a transaction.
 */
public interface PersistenceEnv {
  /**
   * Run code inside a transaction.
   */
  <A> A tx(Function<EntityManager, A> transactional);

  /**
   * Close the environment and free all associated resources.
   */
  void close();
}