src/org/sonews/storage/impl/HSQLDBProvider.java
author František Kučera <franta-hg@frantovo.cz>
Wed Dec 31 12:07:40 2014 +0100 (2014-12-31)
changeset 120 bb1c8a7b774c
parent 44 5d7d1adf387f
permissions -rw-r--r--
XSLT: licence – GNU GPLv3
cli@42
     1
/*
cli@42
     2
 *   SONEWS News Server
cli@42
     3
 *   see AUTHORS for the list of contributors
cli@42
     4
 *
cli@42
     5
 *   This program is free software: you can redistribute it and/or modify
cli@42
     6
 *   it under the terms of the GNU General Public License as published by
cli@42
     7
 *   the Free Software Foundation, either version 3 of the License, or
cli@42
     8
 *   (at your option) any later version.
cli@42
     9
 *
cli@42
    10
 *   This program is distributed in the hope that it will be useful,
cli@42
    11
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
cli@42
    12
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
cli@42
    13
 *   GNU General Public License for more details.
cli@42
    14
 *
cli@42
    15
 *   You should have received a copy of the GNU General Public License
cli@42
    16
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
cli@42
    17
 */
cli@42
    18
package org.sonews.storage.impl;
cli@42
    19
cli@45
    20
import java.sql.SQLException;
cli@45
    21
import java.util.Map;
cli@45
    22
import java.util.concurrent.ConcurrentHashMap;
cli@42
    23
import org.sonews.storage.Storage;
cli@42
    24
import org.sonews.storage.StorageBackendException;
cli@42
    25
import org.sonews.storage.StorageProvider;
cli@42
    26
cli@42
    27
/**
cli@42
    28
 *
cli@42
    29
 * @author Christian Lins
cli@42
    30
 * @since sonews/1.1
cli@42
    31
 */
cli@42
    32
public class HSQLDBProvider implements StorageProvider {
cli@45
    33
	protected static final Map<Thread, HSQLDB> instances =
cli@45
    34
			new ConcurrentHashMap<Thread, HSQLDB>();
cli@42
    35
cli@45
    36
	@Override
cli@42
    37
	public boolean isSupported(String uri) {
cli@44
    38
		return uri.startsWith("jdbc:hsqldb");
cli@42
    39
	}
cli@42
    40
cli@45
    41
	@Override
cli@42
    42
	public Storage storage(Thread thread) throws StorageBackendException {
cli@45
    43
		try {
cli@45
    44
			if (!instances.containsKey(Thread.currentThread())) {
cli@45
    45
				HSQLDB db = new HSQLDB();
cli@45
    46
				db.arise();
cli@45
    47
				instances.put(Thread.currentThread(), db);
cli@45
    48
				return db;
cli@45
    49
			} else {
cli@45
    50
				return instances.get(Thread.currentThread());
cli@45
    51
			}
cli@45
    52
		} catch (SQLException ex) {
cli@45
    53
			throw new StorageBackendException(ex);
cli@45
    54
		}
cli@42
    55
	}
cli@42
    56
cli@42
    57
}