| author | František Kučera <franta-hg@frantovo.cz> |
| Mon, 17 Oct 2011 19:50:23 +0200 | |
| changeset 91 | 70286a6cf338 |
| parent 45 | 7e24949b87b0 |
| permissions | -rwxr-xr-x |
| chris@3 | 1 |
/* |
| chris@3 | 2 |
* SONEWS News Server |
| chris@3 | 3 |
* see AUTHORS for the list of contributors |
| chris@3 | 4 |
* |
| chris@3 | 5 |
* This program is free software: you can redistribute it and/or modify |
| chris@3 | 6 |
* it under the terms of the GNU General Public License as published by |
| chris@3 | 7 |
* the Free Software Foundation, either version 3 of the License, or |
| chris@3 | 8 |
* (at your option) any later version. |
| chris@3 | 9 |
* |
| chris@3 | 10 |
* This program is distributed in the hope that it will be useful, |
| chris@3 | 11 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| chris@3 | 12 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| chris@3 | 13 |
* GNU General Public License for more details. |
| chris@3 | 14 |
* |
| chris@3 | 15 |
* You should have received a copy of the GNU General Public License |
| chris@3 | 16 |
* along with this program. If not, see <http://www.gnu.org/licenses/>. |
| chris@3 | 17 |
*/ |
| chris@3 | 18 |
package org.sonews.storage; |
| chris@3 | 19 |
|
| chris@3 | 20 |
/** |
| cli@42 | 21 |
* Provides access to a storage backend. |
| chris@3 | 22 |
* @author Christian Lins |
| chris@3 | 23 |
* @since sonews/1.0 |
| chris@3 | 24 |
*/ |
| cli@42 | 25 |
public final class StorageManager {
|
| chris@3 | 26 |
|
| cli@37 | 27 |
private static StorageProvider provider; |
| chris@3 | 28 |
|
| cli@45 | 29 |
public static Storage current() throws StorageBackendException {
|
| cli@37 | 30 |
synchronized (StorageManager.class) {
|
| cli@37 | 31 |
if (provider == null) {
|
| cli@37 | 32 |
return null; |
| cli@37 | 33 |
} else {
|
| cli@37 | 34 |
return provider.storage(Thread.currentThread()); |
| cli@37 | 35 |
} |
| cli@37 | 36 |
} |
| cli@37 | 37 |
} |
| chris@3 | 38 |
|
| cli@42 | 39 |
public static StorageProvider loadProvider(String pluginClassName) {
|
| cli@37 | 40 |
try {
|
| cli@37 | 41 |
Class<?> clazz = Class.forName(pluginClassName); |
| cli@37 | 42 |
Object inst = clazz.newInstance(); |
| cli@45 | 43 |
return (StorageProvider)inst; |
| cli@37 | 44 |
} catch (Exception ex) {
|
| cli@37 | 45 |
System.err.println(ex); |
| cli@37 | 46 |
return null; |
| cli@37 | 47 |
} |
| cli@37 | 48 |
} |
| chris@3 | 49 |
|
| cli@37 | 50 |
/** |
| cli@37 | 51 |
* Sets the current storage provider. |
| cli@37 | 52 |
* @param provider |
| cli@37 | 53 |
*/ |
| cli@42 | 54 |
public static void enableProvider(StorageProvider provider) {
|
| cli@37 | 55 |
synchronized (StorageManager.class) {
|
| cli@37 | 56 |
if (StorageManager.provider != null) {
|
| cli@37 | 57 |
disableProvider(); |
| cli@37 | 58 |
} |
| cli@37 | 59 |
StorageManager.provider = provider; |
| cli@37 | 60 |
} |
| cli@37 | 61 |
} |
| chris@3 | 62 |
|
| cli@37 | 63 |
/** |
| cli@37 | 64 |
* Disables the current provider. |
| cli@37 | 65 |
*/ |
| cli@42 | 66 |
public static void disableProvider() {
|
| cli@37 | 67 |
synchronized (StorageManager.class) {
|
| cli@37 | 68 |
provider = null; |
| cli@37 | 69 |
} |
| cli@37 | 70 |
} |
| chris@3 | 71 |
} |