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.map; 25 26 import java.util.concurrent.locks.Lock; 27 import net.jcip.annotations.Immutable; 28 29 /** 30 * A {@link MapRepositoryTransaction} based upon a {@link Lock}. 31 */ 32 @Immutable 33 public class LockBasedTransaction implements MapRepositoryTransaction { 34 private final Lock lock; 35 36 /** 37 * Create a transaction given the lock. This construtor attempts to {@link Lock#lock() acquire the lock}. 38 * 39 * @param lock the lock; may not be null 40 */ 41 public LockBasedTransaction( Lock lock ) { 42 assert lock != null; 43 this.lock = lock; 44 // Make sure we acquire the lock... 45 this.lock.lock(); 46 } 47 48 /** 49 * {@inheritDoc} 50 * 51 * @see org.modeshape.graph.connector.map.MapRepositoryTransaction#commit() 52 */ 53 public void commit() { 54 this.lock.unlock(); 55 } 56 57 /** 58 * {@inheritDoc} 59 * 60 * @see org.modeshape.graph.connector.map.MapRepositoryTransaction#rollback() 61 */ 62 public void rollback() { 63 this.lock.unlock(); 64 } 65 }