src/org/sonews/storage/StorageManager.java
author cli
Sun, 29 Aug 2010 18:17:37 +0200
changeset 37 74139325d305
parent 35 ed84c8bdd87b
child 42 7f84f4de2893
permissions -rw-r--r--
Switch intent style to Original K&R / Linux / Kernel.
     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;
    20 
    21 /**
    22  *
    23  * @author Christian Lins
    24  * @since sonews/1.0
    25  */
    26 public final class StorageManager
    27 {
    28 
    29 	private static StorageProvider provider;
    30 
    31 	public static Storage current()
    32 		throws StorageBackendException
    33 	{
    34 		synchronized (StorageManager.class) {
    35 			if (provider == null) {
    36 				return null;
    37 			} else {
    38 				return provider.storage(Thread.currentThread());
    39 			}
    40 		}
    41 	}
    42 
    43 	public static StorageProvider loadProvider(String pluginClassName)
    44 	{
    45 		try {
    46 			Class<?> clazz = Class.forName(pluginClassName);
    47 			Object inst = clazz.newInstance();
    48 			return (StorageProvider) inst;
    49 		} catch (Exception ex) {
    50 			System.err.println(ex);
    51 			return null;
    52 		}
    53 	}
    54 
    55 	/**
    56 	 * Sets the current storage provider.
    57 	 * @param provider
    58 	 */
    59 	public static void enableProvider(StorageProvider provider)
    60 	{
    61 		synchronized (StorageManager.class) {
    62 			if (StorageManager.provider != null) {
    63 				disableProvider();
    64 			}
    65 			StorageManager.provider = provider;
    66 		}
    67 	}
    68 
    69 	/**
    70 	 * Disables the current provider.
    71 	 */
    72 	public static void disableProvider()
    73 	{
    74 		synchronized (StorageManager.class) {
    75 			provider = null;
    76 		}
    77 	}
    78 }