| 1 | /* |
| 2 | * Copyright 2006-2007 the original author or authors. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.springframework.batch.support.transaction; |
| 18 | |
| 19 | import java.util.Stack; |
| 20 | |
| 21 | import org.springframework.transaction.TransactionDefinition; |
| 22 | import org.springframework.transaction.TransactionException; |
| 23 | import org.springframework.transaction.support.AbstractPlatformTransactionManager; |
| 24 | import org.springframework.transaction.support.DefaultTransactionStatus; |
| 25 | import org.springframework.transaction.support.TransactionSynchronizationManager; |
| 26 | |
| 27 | public class ResourcelessTransactionManager extends AbstractPlatformTransactionManager { |
| 28 | |
| 29 | protected void doBegin(Object transaction, TransactionDefinition definition) throws TransactionException { |
| 30 | ((ResourcelessTransaction) transaction).begin(); |
| 31 | } |
| 32 | |
| 33 | protected void doCommit(DefaultTransactionStatus status) throws TransactionException { |
| 34 | logger.debug("Committing resourceless transaction on [" + status.getTransaction() + "]"); |
| 35 | } |
| 36 | |
| 37 | protected Object doGetTransaction() throws TransactionException { |
| 38 | Object transaction = new ResourcelessTransaction(); |
| 39 | Stack<Object> resources; |
| 40 | if (!TransactionSynchronizationManager.hasResource(this)) { |
| 41 | resources = new Stack<Object>(); |
| 42 | TransactionSynchronizationManager.bindResource(this, resources); |
| 43 | } |
| 44 | else { |
| 45 | @SuppressWarnings("unchecked") |
| 46 | Stack<Object> stack = (Stack<Object>) TransactionSynchronizationManager.getResource(this); |
| 47 | resources = stack; |
| 48 | } |
| 49 | resources.push(transaction); |
| 50 | return transaction; |
| 51 | } |
| 52 | |
| 53 | protected void doRollback(DefaultTransactionStatus status) throws TransactionException { |
| 54 | logger.debug("Rolling back resourceless transaction on [" + status.getTransaction() + "]"); |
| 55 | } |
| 56 | |
| 57 | protected boolean isExistingTransaction(Object transaction) throws TransactionException { |
| 58 | if (TransactionSynchronizationManager.hasResource(this)) { |
| 59 | @SuppressWarnings("unchecked") |
| 60 | Stack<Object> stack = (Stack<Object>) TransactionSynchronizationManager.getResource(this); |
| 61 | return stack.size() > 1; |
| 62 | } |
| 63 | return ((ResourcelessTransaction) transaction).isActive(); |
| 64 | } |
| 65 | |
| 66 | protected void doSetRollbackOnly(DefaultTransactionStatus status) throws TransactionException { |
| 67 | } |
| 68 | |
| 69 | protected void doCleanupAfterCompletion(Object transaction) { |
| 70 | @SuppressWarnings("unchecked") |
| 71 | Stack<Object> list = (Stack<Object>) TransactionSynchronizationManager.getResource(this); |
| 72 | Stack<Object> resources = list; |
| 73 | resources.clear(); |
| 74 | TransactionSynchronizationManager.unbindResource(this); |
| 75 | ((ResourcelessTransaction) transaction).clear(); |
| 76 | } |
| 77 | |
| 78 | private static class ResourcelessTransaction { |
| 79 | |
| 80 | private boolean active = false; |
| 81 | |
| 82 | public boolean isActive() { |
| 83 | return active; |
| 84 | } |
| 85 | |
| 86 | public void begin() { |
| 87 | active = true; |
| 88 | } |
| 89 | |
| 90 | public void clear() { |
| 91 | active = false; |
| 92 | } |
| 93 | |
| 94 | } |
| 95 | |
| 96 | } |