001/* 002 * Copyright 2006-2007 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.batch.support.transaction; 018 019import java.util.ArrayList; 020import java.util.List; 021 022import org.springframework.transaction.TransactionDefinition; 023import org.springframework.transaction.TransactionException; 024import org.springframework.transaction.support.AbstractPlatformTransactionManager; 025import org.springframework.transaction.support.DefaultTransactionStatus; 026import org.springframework.transaction.support.TransactionSynchronizationManager; 027 028@SuppressWarnings("serial") 029public class ResourcelessTransactionManager extends AbstractPlatformTransactionManager { 030 031 @Override 032 protected void doBegin(Object transaction, TransactionDefinition definition) throws TransactionException { 033 ((ResourcelessTransaction) transaction).begin(); 034 } 035 036 @Override 037 protected void doCommit(DefaultTransactionStatus status) throws TransactionException { 038 if (logger.isDebugEnabled()) { 039 logger.debug("Committing resourceless transaction on [" + status.getTransaction() + "]"); 040 } 041 } 042 043 @Override 044 protected Object doGetTransaction() throws TransactionException { 045 Object transaction = new ResourcelessTransaction(); 046 List<Object> resources; 047 if (!TransactionSynchronizationManager.hasResource(this)) { 048 resources = new ArrayList<Object>(); 049 TransactionSynchronizationManager.bindResource(this, resources); 050 } 051 else { 052 @SuppressWarnings("unchecked") 053 List<Object> stack = (List<Object>) TransactionSynchronizationManager.getResource(this); 054 resources = stack; 055 } 056 resources.add(transaction); 057 return transaction; 058 } 059 060 @Override 061 protected void doRollback(DefaultTransactionStatus status) throws TransactionException { 062 if (logger.isDebugEnabled()) { 063 logger.debug("Rolling back resourceless transaction on [" + status.getTransaction() + "]"); 064 } 065 } 066 067 @Override 068 protected boolean isExistingTransaction(Object transaction) throws TransactionException { 069 if (TransactionSynchronizationManager.hasResource(this)) { 070 List<?> stack = (List<?>) TransactionSynchronizationManager.getResource(this); 071 return stack.size() > 1; 072 } 073 return ((ResourcelessTransaction) transaction).isActive(); 074 } 075 076 @Override 077 protected void doSetRollbackOnly(DefaultTransactionStatus status) throws TransactionException { 078 } 079 080 @Override 081 protected void doCleanupAfterCompletion(Object transaction) { 082 List<?> resources = (List<?>) TransactionSynchronizationManager.getResource(this); 083 resources.clear(); 084 TransactionSynchronizationManager.unbindResource(this); 085 ((ResourcelessTransaction) transaction).clear(); 086 } 087 088 private static class ResourcelessTransaction { 089 090 private boolean active = false; 091 092 public boolean isActive() { 093 return active; 094 } 095 096 public void begin() { 097 active = true; 098 } 099 100 public void clear() { 101 active = false; 102 } 103 104 } 105 106}