org/sonews/storage/impl/JDBCDatabaseProvider.java
author cli
Wed Aug 26 17:04:04 2009 +0200 (2009-08-26)
changeset 24 2ff819fa5be1
child 30 146b3275b792
permissions -rw-r--r--
Some changes to storage interface.
     1 /*
     2  *   SONEWS News Server
     3  *   see AUTHORS for the list of contributors
     4  *
     5  *   This program is free software: you can redistribute it and/or modify
     6  *   it under the terms of the GNU General Public License as published by
     7  *   the Free Software Foundation, either version 3 of the License, or
     8  *   (at your option) any later version.
     9  *
    10  *   This program is distributed in the hope that it will be useful,
    11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13  *   GNU General Public License for more details.
    14  *
    15  *   You should have received a copy of the GNU General Public License
    16  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17  */
    18 
    19 package org.sonews.storage.impl;
    20 
    21 import org.sonews.storage.*;
    22 import java.sql.SQLException;
    23 import java.util.Map;
    24 import java.util.concurrent.ConcurrentHashMap;
    25 
    26 /**
    27  *
    28  * @author Christian Lins
    29  * @since sonews/1.0
    30  */
    31 public class JDBCDatabaseProvider implements StorageProvider
    32 {
    33 
    34   protected static final Map<Thread, JDBCDatabase> instances
    35     = new ConcurrentHashMap<Thread, JDBCDatabase>();
    36 
    37   @Override
    38   public boolean isSupported(String uri)
    39   {
    40     throw new UnsupportedOperationException("Not supported yet.");
    41   }
    42 
    43   @Override
    44   public Storage storage(Thread thread)
    45     throws StorageBackendException
    46   {
    47     try
    48     {
    49     if(!instances.containsKey(Thread.currentThread()))
    50     {
    51       JDBCDatabase db = new JDBCDatabase();
    52       db.arise();
    53       instances.put(Thread.currentThread(), db);
    54       return db;
    55     }
    56     else
    57     {
    58       return instances.get(Thread.currentThread());
    59     }
    60     }
    61     catch(SQLException ex)
    62     {
    63       throw new StorageBackendException(ex);
    64     }
    65   }
    66 
    67 }