agents-audit/src/main/java/org/apache/ranger/audit/dao/DaoManager.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.ranger.audit.dao;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceContext;


//@Component
public class DaoManager extends DaoManagerBase {

	@PersistenceContext
	private EntityManagerFactory emf;

	static ThreadLocal<EntityManager> sEntityManager;

	public void setEntityManagerFactory(EntityManagerFactory emf) {
		this.emf = emf;
		sEntityManager = new ThreadLocal<EntityManager>();
	}

	@Override
	public EntityManager getEntityManager() {
		EntityManager em = null;

		if(sEntityManager != null) {
			em = sEntityManager.get();

			if(em == null && this.emf != null) {
				em = this.emf.createEntityManager();

				sEntityManager.set(em);
			}
		} else {
			logger.error("EntityManagerFactory was not set in this thread.", new Throwable());
		}

		return em;
	}
}