| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIESOR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.aries.tx.control.jpa.xa.impl; |
| |
| import static org.osgi.service.transaction.control.TransactionStatus.NO_TRANSACTION; |
| |
| import java.util.UUID; |
| |
| import javax.persistence.EntityManager; |
| import javax.persistence.PersistenceException; |
| |
| import org.apache.aries.tx.control.jpa.common.impl.AbstractJPAEntityManagerProvider; |
| import org.apache.aries.tx.control.jpa.common.impl.EntityManagerWrapper; |
| import org.apache.aries.tx.control.jpa.common.impl.ScopedEntityManagerWrapper; |
| import org.apache.aries.tx.control.jpa.common.impl.TxEntityManagerWrapper; |
| import org.osgi.service.transaction.control.TransactionContext; |
| import org.osgi.service.transaction.control.TransactionControl; |
| import org.osgi.service.transaction.control.TransactionException; |
| |
| public class XATxContextBindingEntityManager extends EntityManagerWrapper { |
| |
| private final TransactionControl txControl; |
| private final UUID resourceId; |
| private final AbstractJPAEntityManagerProvider provider; |
| private final ThreadLocal<TransactionControl> commonTxStore; |
| |
| |
| public XATxContextBindingEntityManager(TransactionControl txControl, |
| AbstractJPAEntityManagerProvider provider, UUID resourceId, |
| ThreadLocal<TransactionControl> commonTxStore) { |
| this.txControl = txControl; |
| this.provider = provider; |
| this.resourceId = resourceId; |
| this.commonTxStore = commonTxStore; |
| } |
| |
| @Override |
| protected final EntityManager getRealEntityManager() { |
| |
| TransactionContext txContext = txControl.getCurrentContext(); |
| |
| if (txContext == null) { |
| throw new TransactionException("The resource " + provider |
| + " cannot be accessed outside of an active Transaction Context"); |
| } |
| |
| EntityManager existing = (EntityManager) txContext.getScopedValue(resourceId); |
| |
| if (existing != null) { |
| return existing; |
| } |
| |
| TransactionControl previous = commonTxStore.get(); |
| commonTxStore.set(txControl); |
| |
| EntityManager toReturn; |
| EntityManager toClose; |
| |
| try { |
| if (txContext.getTransactionStatus() == NO_TRANSACTION) { |
| toClose = provider.createEntityManager(); |
| toReturn = new ScopedEntityManagerWrapper(toClose); |
| } else if (txContext.supportsXA()) { |
| toClose = provider.createEntityManager(); |
| toReturn = new TxEntityManagerWrapper(toClose); |
| toClose.joinTransaction(); |
| } else { |
| throw new TransactionException( |
| "There is a transaction active, but it does not support local participants"); |
| } |
| } catch (Exception sqle) { |
| commonTxStore.set(previous); |
| throw new TransactionException( |
| "There was a problem getting hold of a database connection", |
| sqle); |
| } |
| |
| |
| txContext.postCompletion(x -> { |
| try { |
| toClose.close(); |
| } catch (PersistenceException sqle) { |
| // TODO log this |
| } |
| commonTxStore.set(previous); |
| }); |
| |
| txContext.putScopedValue(resourceId, toReturn); |
| |
| return toReturn; |
| } |
| } |