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 java.text.MessageFormat;
  21 import javax.naming.Context;
  22 import javax.naming.InitialContext;
  23 import javax.naming.NamingException;
  24 import javax.persistence.EntityManager;
  25 import javax.persistence.PersistenceContext;
  26 import org.mxchange.jcoreeelogger.beans.local.logger.Log;
  27 import org.mxchange.jcoreeelogger.beans.local.logger.LoggerBeanLocal;
  28
  29 /**
  30  * A helper class for beans that access the database.
  31  * <p>
  32  * @author Roland Haeder<roland@mxchange.org>
  33  */
  34 public abstract class BaseDatabaseBean implements Serializable {
  35
  36         /**
  37          * Serial number
  38          */
  39         private static final long serialVersionUID = 217_687_175_985_875L;
  40
  41         /**
  42          * Entity manager
  43          */
  44         @PersistenceContext
  45         private EntityManager entityManager;
  46
  47         /**
  48          * Logger instance
  49          */
  50         @Log
  51         private LoggerBeanLocal loggerBeanLocal;
  52
  53         /**
  54          * Protected constructor
  55          */
  56         protected BaseDatabaseBean () {
  57                 try {
  58                         // Get initial context
  59                         Context context = new InitialContext();
  60
  61                         // Lookup logger
  62                         this.loggerBeanLocal = (LoggerBeanLocal) context.lookup("java:global/jcore-logger-ejb/logger!org.mxchange.jcoreeelogger.beans.local.logger.LoggerBeanLocal"); //NOI18N
  63                 } catch (final NamingException ex) {
  64                         // Continue to throw
  65                         throw new RuntimeException(MessageFormat.format("context.lookup() failed: {0}", ex.getMessage()), ex); //NOI18N
  66                 }
  67         }
  68
  69         /**
  70          * Getter for connection instance
  71          * <p>
  72          * @return Connection instance
  73          */
  74         protected EntityManager getEntityManager () {
  75                 return this.entityManager;
  76         }
  77
  78         /**
  79          * Getter for loggerBeanLocal
  80          * <p>
  81          * @return Logger instance
  82          */
  83         protected LoggerBeanLocal getLoggerBeanLocal () {
  84                 return this.loggerBeanLocal;
  85         }
  86
  87 }