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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements. See the NOTICE file distributed with this
    4    * work for additional information regarding copyright ownership. The ASF
    5    * licenses this file to You under the Apache License, Version 2.0 (the
    6    * "License"); you may not use this file except in compliance with the License.
    7    * You may obtain a copy of the License at
    8    * http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law
    9    * or agreed to in writing, software distributed under the License is
   10    * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   11    * KIND, either express or implied. See the License for the specific language
   12    * governing permissions and limitations under the License.
   13    */
   14   package org.apache.webbeans.resource.spi.se;
   15   
   16   import java.util.Map;
   17   import java.util.concurrent.ConcurrentHashMap;
   18   
   19   import javax.persistence.EntityManager;
   20   import javax.persistence.EntityManagerFactory;
   21   import javax.persistence.Persistence;
   22   
   23   
   24   /**
   25    * SPI Implementation which accesses the PersistenceManagerFactory via the Persistence class
   26    */
   27   public class JPAServicePersistenceImpl
   28   {
   29       
   30       public static final String SINGLETON_WEBBEANS_ENTITYMANAGERS_MAP = EntityManagersManager.class.getName();
   31       
   32       private Map<String, EntityManagerFactory> factoryCache = new ConcurrentHashMap<String, EntityManagerFactory>();
   33   
   34       /**
   35        * {@inheritDoc}
   36        * 
   37        */
   38       public EntityManagerFactory getPersistenceUnit(String unitName)
   39       {
   40           if(factoryCache.get(unitName) != null)
   41           {
   42               return factoryCache.get(unitName);
   43           }
   44           
   45           //X TODO this currently ignores JNDI
   46           EntityManagerFactory emf = Persistence.createEntityManagerFactory(unitName);
   47           
   48           factoryCache.put(unitName, emf);
   49               
   50           return emf;
   51       }
   52   
   53       /** 
   54        * {@inheritDoc}
   55        * TODO: currently this returns an extended EntityManager, so we have to wrap it
   56        * We have to create a Proxy for injecting entity managers. So, whenever method is called
   57        * on the entity managers, look at current Transaction, if exist call joinTransaction();
   58        */
   59       public EntityManager getPersistenceContext(String unitName)
   60       {
   61           EntityManagerFactory emf = getPersistenceUnit(unitName);        
   62           EntityManager em = emf.createEntityManager();
   63           
   64           return em;
   65       }
   66   }

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