001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.transaction;
016    
017    import com.liferay.portal.kernel.util.ArrayUtil;
018    
019    import java.util.concurrent.atomic.AtomicReference;
020    
021    /**
022     * @author Shuyang Zhou
023     */
024    public class TransactionLifecycleManager {
025    
026            public static void fireTransactionCommittedEvent(
027                    TransactionAttribute transactionAttribute,
028                    TransactionStatus transactionStatus) {
029    
030                    for (TransactionLifecycleListener transactionLifecycleListener :
031                                    _transactionLifecycleListenersReference.get()) {
032    
033                            transactionLifecycleListener.committed(
034                                    transactionAttribute, transactionStatus);
035                    }
036            }
037    
038            public static void fireTransactionCreatedEvent(
039                    TransactionAttribute transactionAttribute,
040                    TransactionStatus transactionStatus) {
041    
042                    for (TransactionLifecycleListener transactionLifecycleListener :
043                                    _transactionLifecycleListenersReference.get()) {
044    
045                            transactionLifecycleListener.created(
046                                    transactionAttribute, transactionStatus);
047                    }
048            }
049    
050            public static void fireTransactionRollbackedEvent(
051                    TransactionAttribute transactionAttribute,
052                    TransactionStatus transactionStatus, Throwable throwable) {
053    
054                    for (TransactionLifecycleListener transactionLifecycleListener :
055                                    _transactionLifecycleListenersReference.get()) {
056    
057                            transactionLifecycleListener.rollbacked(
058                                    transactionAttribute, transactionStatus, throwable);
059                    }
060            }
061    
062            public static TransactionLifecycleListener[]
063                    getRegisteredTransactionLifecycleListeners() {
064    
065                    TransactionLifecycleListener[] transactionLifecycleListeners =
066                            _transactionLifecycleListenersReference.get();
067    
068                    return transactionLifecycleListeners.clone();
069            }
070    
071            public static boolean register(
072                    TransactionLifecycleListener transactionLifecycleListener) {
073    
074                    while (true) {
075                            TransactionLifecycleListener[] transactionLifecycleListeners =
076                                    _transactionLifecycleListenersReference.get();
077    
078                            if (ArrayUtil.contains(
079                                            transactionLifecycleListeners,
080                                            transactionLifecycleListener)) {
081    
082                                    return false;
083                            }
084    
085                            TransactionLifecycleListener[] newTransactionLifecycleListeners =
086                                    ArrayUtil.append(
087                                            transactionLifecycleListeners,
088                                            transactionLifecycleListener);
089    
090                            if (_transactionLifecycleListenersReference.compareAndSet(
091                                            transactionLifecycleListeners,
092                                            newTransactionLifecycleListeners)) {
093    
094                                    return true;
095                            }
096                    }
097            }
098    
099            public static boolean unregister(
100                    TransactionLifecycleListener transactionLifecycleListener) {
101    
102                    while (true) {
103                            TransactionLifecycleListener[] transactionLifecycleListeners =
104                                    _transactionLifecycleListenersReference.get();
105    
106                            TransactionLifecycleListener[] newTransactionLifecycleListeners =
107                                    ArrayUtil.remove(
108                                            transactionLifecycleListeners,
109                                            transactionLifecycleListener);
110    
111                            if (transactionLifecycleListeners ==
112                                            newTransactionLifecycleListeners) {
113    
114                                    return false;
115                            }
116    
117                            if (_transactionLifecycleListenersReference.compareAndSet(
118                                            transactionLifecycleListeners,
119                                            newTransactionLifecycleListeners)) {
120    
121                                    return true;
122                            }
123                    }
124            }
125    
126            private static final AtomicReference<TransactionLifecycleListener[]>
127                    _transactionLifecycleListenersReference = new AtomicReference<>(
128                            new TransactionLifecycleListener[0]);
129    
130    }