/*
    * Copyright (c) 2002-2014, Mairie de Paris
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    *
    *  1. Redistributions of source code must retain the above copyright notice
   *     and the following disclaimer.
   *
   *  2. Redistributions in binary form must reproduce the above copyright notice
   *     and the following disclaimer in the documentation and/or other materials
   *     provided with the distribution.
   *
   *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
   *     contributors may be used to endorse or promote products derived from
   *     this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   * License 1.0
   */
  
  /** Contibution AtosWorldline / Meteo France - mlux */
  package fr.paris.lutece.util.pool.service;
  
  import com.mchange.v2.c3p0.ComboPooledDataSource;
  
  import org.apache.log4j.Logger;
  
  import java.sql.Connection;
  import java.sql.SQLException;
  
  import java.util.Hashtable;
  
  import javax.sql.DataSource;
  
  
  /**
   * C3P0 connection service
   */
  public class C3p0ConnectionService implements ConnectionService
  {
      /**
       * C3P0 connection pool
       */
      private ComboPooledDataSource _dataSource;
  
      /**
       * Pool name
       */
      private String _strPoolName;
  
      /**
       * Log4j logger
       */
      private Logger _logger = Logger.getLogger( this.getClass(  ) );
  
      /**
       * {@inheritDoc }
       */
      public void init( Hashtable<String, String> htParamsConnectionPool )
      {
          try
          {
              _dataSource = new ComboPooledDataSource( _strPoolName );
  
              String strDriver = htParamsConnectionPool.get( getPoolName(  ) + ".driver" );
              _dataSource.setDriverClass( strDriver );
  
              String strUrl = htParamsConnectionPool.get( getPoolName(  ) + ".url" );
              _dataSource.setJdbcUrl( strUrl );
  
              String strUser = htParamsConnectionPool.get( getPoolName(  ) + ".user" );
              _dataSource.setUser( strUser );
  
              String strPassword = htParamsConnectionPool.get( getPoolName(  ) + ".password" );
              _dataSource.setPassword( strPassword );
  
              String strMaxConns = htParamsConnectionPool.get( getPoolName(  ) + ".maxconns" );
              int nMaxConns = ( strMaxConns == null ) ? 0 : Integer.parseInt( strMaxConns );
              _dataSource.setMaxPoolSize( nMaxConns );
  
              String strMinConns = htParamsConnectionPool.get( getPoolName(  ) + ".initconns" );
              int nInitConns = ( strMinConns == null ) ? 0 : Integer.parseInt( strMinConns );
              _dataSource.setInitialPoolSize( nInitConns );
              _dataSource.setMinPoolSize( nInitConns );
          }
         catch ( Exception e )
         {
             _logger.error( "Error while initializing the pool " + getPoolName(  ), e );
         }
 
         _logger.info( "Initialization of the C3P0 pool named '" + getPoolName(  ) + "', Min/Max pool size : " +
             _dataSource.getMinPoolSize(  ) + "/" + _dataSource.getMaxPoolSize(  ) );
     }
 
     /**
      * {@inheritDoc }
      */
     public Connection getConnection(  )
     {
         Connection conn = null;
 
         try
         {
             if ( _dataSource != null )
             {
                 conn = _dataSource.getConnection(  );
 
                 if ( conn != null )
                 {
                     _logger.debug( "The connexion is get, Current/Max pool : " +
                         _dataSource.getNumConnectionsAllUsers(  ) + "/" + _dataSource.getMaxPoolSize(  ) );
                 }
             }
         }
         catch ( Exception e )
         {
             _logger.error( "Erreur when getting the connexion with the pool : " + getPoolName(  ), e );
         }
 
         return conn;
     }
 
     /**
      * {@inheritDoc }
      */
     public void freeConnection( Connection conn )
     {
         try
         {
             conn.close(  );
 
             _logger.debug( "The connexion is released, Current/Max pool : " +
                 _dataSource.getNumConnectionsAllUsers(  ) + "/" + _dataSource.getMaxPoolSize(  ) );
         }
         catch ( SQLException e )
         {
             _logger.error( "SQL error when releasing the connexion with the pool : " + getPoolName(  ), e );
         }
         catch ( Exception e )
         {
             _logger.error( "Error while releasing the connexion with the pool : " + getPoolName(  ), e );
         }
     }
 
     /**
      * {@inheritDoc }
      */
     public void setPoolName( String poolName )
     {
         this._strPoolName = poolName;
     }
 
     /**
      * {@inheritDoc }
      */
     public String getPoolName(  )
     {
         return _strPoolName;
     }
 
     /**
      * {@inheritDoc }
      */
     public void setLogger( Logger log )
     {
         this._logger = log;
     }
 
     /**
      * {@inheritDoc }
      */
     public Logger getLogger(  )
     {
         return _logger;
     }
 
     /**
      * {@inheritDoc }
      */
     public void release(  )
     {
     }
 
     /**
      * {@inheritDoc }
      */
     public int getCurrentConnections(  )
     {
         int nCurrentConnections = -1;
 
         try
         {
             nCurrentConnections = _dataSource.getNumConnections(  );
         }
         catch ( SQLException ex )
         {
             _logger.error( "GetCurrentConnections error : " + ex.getMessage(  ), ex );
         }
 
         return nCurrentConnections;
     }
 
     /**
      * {@inheritDoc }
      */
     public int getMaxConnections(  )
     {
         return _dataSource.getMaxPoolSize(  );
     }
 
     /**
      * {@inheritDoc }
      */
     public String getPoolProvider(  )
     {
         return "C3P0";
     }
 
     /**
      * {@inheritDoc }
      */
     public DataSource getDataSource(  )
     {
         return _dataSource;
     }
 }