1 /*
2 * ModeShape (http://www.modeshape.org)
3 * See the COPYRIGHT.txt file distributed with this work for information
4 * regarding copyright ownership. Some portions may be licensed
5 * to Red Hat, Inc. under one or more contributor license agreements.
6 * See the AUTHORS.txt file in the distribution for a full listing of
7 * individual contributors.
8 *
9 * ModeShape is free software. Unless otherwise indicated, all code in ModeShape
10 * is licensed to you under the terms of the GNU Lesser General Public License as
11 * published by the Free Software Foundation; either version 2.1 of
12 * the License, or (at your option) any later version.
13 *
14 * ModeShape is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this software; if not, write to the Free
21 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
22 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
23 */
24 package org.modeshape.graph.connector.inmemory;
25
26 import java.util.concurrent.locks.Lock;
27 import java.util.concurrent.locks.ReadWriteLock;
28 import java.util.concurrent.locks.ReentrantReadWriteLock;
29 import net.jcip.annotations.ThreadSafe;
30 import org.modeshape.graph.ExecutionContext;
31 import org.modeshape.graph.connector.base.Repository;
32
33 /**
34 * The representation of an in-memory repository and its content.
35 */
36 @ThreadSafe
37 public class InMemoryRepository extends Repository<InMemoryNode, InMemoryWorkspace> {
38
39 protected final ReadWriteLock lock = new ReentrantReadWriteLock();
40
41 public InMemoryRepository( InMemoryRepositorySource source ) {
42 super(source);
43 initialize();
44 }
45
46 /**
47 * {@inheritDoc}
48 *
49 * @see org.modeshape.graph.connector.base.Repository#startTransaction(org.modeshape.graph.ExecutionContext, boolean)
50 */
51 @Override
52 public InMemoryTransaction startTransaction( ExecutionContext context,
53 boolean readonly ) {
54 final Lock lock = readonly ? this.lock.readLock() : this.lock.writeLock();
55 lock.lock();
56 return new InMemoryTransaction(context, this, getRootNodeUuid(), lock);
57 }
58 }