src/org/mxchange/jcoreee/database/BaseDatabaseBean.java

   1 /*
   2  * Copyright (C) 2016 Roland Haeder
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.mxchange.jcoreee.database;
  18
  19 import java.io.Serializable;
  20 import javax.naming.Context;
  21 import javax.naming.InitialContext;
  22 import javax.naming.NamingException;
  23 import javax.persistence.EntityManager;
  24 import javax.persistence.PersistenceContext;
  25 import org.mxchange.jcoreeelogger.beans.local.logger.Log;
  26 import org.mxchange.jcoreeelogger.beans.local.logger.LoggerBeanLocal;
  27
  28 /**
  29  * A helper class for beans that access the database.
  30  * <p>
  31  * @author Roland Haeder<roland@mxchange.org>
  32  */
  33 public abstract class BaseDatabaseBean implements Serializable {
  34
  35         /**
  36          * Serial number
  37          */
  38         private static final long serialVersionUID = 217_687_175_985_875L;
  39
  40         /**
  41          * Entity manager
  42          */
  43         @PersistenceContext
  44         private EntityManager entityManager;
  45
  46         /**
  47          * Logger instance
  48          */
  49         @Log
  50         private LoggerBeanLocal loggerBeanLocal;
  51
  52         /**
  53          * Protected constructor
  54          */
  55         protected BaseDatabaseBean () {
  56                 try {
  57                         // Get initial context
  58                         Context context = new InitialContext();
  59
  60                         // Lookup logger
  61                         this.loggerBeanLocal = (LoggerBeanLocal) context.lookup("java:global/jcore-logger-ejb/logger!org.mxchange.jcoreeelogger.beans.local.logger.LoggerBeanLocal"); //NOI18N
  62                 } catch (final NamingException ex) {
  63                         // Continue to throw
  64                         throw new RuntimeException("context.lookup() failed.", ex); //NOI18N
  65                 }
  66         }
  67
  68         /**
  69          * Getter for connection instance
  70          * <p>
  71          * @return Connection instance
  72          */
  73         protected EntityManager getEntityManager () {
  74                 return this.entityManager;
  75         }
  76
  77         /**
  78          * Getter for loggerBeanLocal
  79          * <p>
  80          * @return Logger instance
  81          */
  82         protected LoggerBeanLocal getLoggerBeanLocal () {
  83                 return this.loggerBeanLocal;
  84         }
  85
  86 }