| 1 | // Copyright 2004-2007 Jean-Francois Poilpret |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package net.sourceforge.hivetranse.transaction.jdbc; |
| 16 | |
| 17 | import java.sql.SQLException; |
| 18 | |
| 19 | import org.apache.commons.logging.Log; |
| 20 | |
| 21 | import net.sourceforge.hivetranse.transaction.AbstractTransactionService; |
| 22 | import net.sourceforge.hivetranse.transaction.TransactionException; |
| 23 | import net.sourceforge.hiveutils.collections.Stack; |
| 24 | import net.sourceforge.hiveutils.collections.impl.StackImpl; |
| 25 | |
| 26 | /** |
| 27 | * Service managing JDBC transactions. |
| 28 | * This service works hand-in-hand with <code>ConnectionProxyFactory</code> |
| 29 | * to handle different transactions on the same DataSource if necessary. |
| 30 | * <p> |
| 31 | * Only one DataSource can have a transaction (XA transactions are not supported |
| 32 | * in pure JDBC, without JTA). This DataSource <b>MUST BE</b> pooled. |
| 33 | * <p> |
| 34 | * This service does not only handle JDBC connections but it also does all the |
| 35 | * work related to Connection creation from a DataSource; the current |
| 36 | * Connectiont is stored on <code>ThreadLocalStorage</code>. |
| 37 | * <p> |
| 38 | * <b>ServiceModel must be threaded</b> |
| 39 | * |
| 40 | * @author Jean-Francois Poilpret |
| 41 | */ |
| 42 | public class JdbcTransactionService extends AbstractTransactionService |
| 43 | { |
| 44 | public JdbcTransactionService( Log logger, |
| 45 | boolean wrapRuntimeExceptions, |
| 46 | boolean deferConnectionClose) |
| 47 | { |
| 48 | super(logger, wrapRuntimeExceptions); |
| 49 | _deferConnectionClose = deferConnectionClose; |
| 50 | if (_deferConnectionClose) |
| 51 | { |
| 52 | _connectionsRepositories = new StackImpl<ConnectionsRepository>(); |
| 53 | } |
| 54 | else |
| 55 | { |
| 56 | _connectionsRepositories = null; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | protected Object createTransaction() throws Exception |
| 61 | { |
| 62 | return new ConnectionsRepositoryImpl(); |
| 63 | } |
| 64 | |
| 65 | protected void endTransaction(Object tx, boolean commit) |
| 66 | throws Exception |
| 67 | { |
| 68 | ConnectionsRepository repo = (ConnectionsRepository) tx; |
| 69 | if (_deferConnectionClose) |
| 70 | { |
| 71 | _connectionsRepositories.push(repo); |
| 72 | } |
| 73 | repo.endAllConnections(!_deferConnectionClose, commit); |
| 74 | } |
| 75 | |
| 76 | protected void cleanUp() |
| 77 | { |
| 78 | super.cleanUp(); |
| 79 | if (_deferConnectionClose) |
| 80 | { |
| 81 | try |
| 82 | { |
| 83 | while (!_connectionsRepositories.isEmpty()) |
| 84 | { |
| 85 | ConnectionsRepository repo = _connectionsRepositories.pop(); |
| 86 | //#### should we commit instead? |
| 87 | repo.endAllConnections(true, false); |
| 88 | } |
| 89 | } |
| 90 | catch (SQLException e) |
| 91 | { |
| 92 | throw new TransactionException(e); |
| 93 | } |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | private final boolean _deferConnectionClose; |
| 98 | private final Stack<ConnectionsRepository> _connectionsRepositories; |
| 99 | } |