| /* |
| * 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.jdbc.xa.impl; |
| |
| import static org.osgi.service.transaction.control.TransactionStatus.NO_TRANSACTION; |
| |
| import java.sql.Connection; |
| import java.sql.SQLException; |
| import java.util.UUID; |
| |
| import javax.sql.DataSource; |
| import javax.transaction.xa.XAResource; |
| |
| import org.apache.aries.tx.control.jdbc.common.impl.ConnectionWrapper; |
| import org.apache.aries.tx.control.jdbc.common.impl.ScopedConnectionWrapper; |
| import org.apache.aries.tx.control.jdbc.common.impl.TxConnectionWrapper; |
| import org.apache.aries.tx.control.jdbc.xa.connection.impl.XAConnectionWrapper; |
| import org.osgi.service.transaction.control.LocalResource; |
| import org.osgi.service.transaction.control.TransactionContext; |
| import org.osgi.service.transaction.control.TransactionControl; |
| import org.osgi.service.transaction.control.TransactionException; |
| |
| public class XAEnabledTxContextBindingConnection extends ConnectionWrapper { |
| |
| private final TransactionControl txControl; |
| private final UUID resourceId; |
| private final DataSource dataSource; |
| private final boolean xaEnabled; |
| private final boolean localEnabled; |
| |
| public XAEnabledTxContextBindingConnection(TransactionControl txControl, |
| DataSource dataSource, UUID resourceId, boolean xaEnabled, boolean localEnabled) { |
| this.txControl = txControl; |
| this.dataSource = dataSource; |
| this.resourceId = resourceId; |
| this.xaEnabled = xaEnabled; |
| this.localEnabled = localEnabled; |
| } |
| |
| @Override |
| protected final Connection getDelegate() { |
| |
| TransactionContext txContext = txControl.getCurrentContext(); |
| |
| if (txContext == null) { |
| throw new TransactionException("The resource " + dataSource |
| + " cannot be accessed outside of an active Transaction Context"); |
| } |
| |
| Connection existing = (Connection) txContext.getScopedValue(resourceId); |
| |
| if (existing != null) { |
| return existing; |
| } |
| |
| Connection toReturn; |
| Connection toClose; |
| |
| try { |
| if (txContext.getTransactionStatus() == NO_TRANSACTION) { |
| toClose = dataSource.getConnection(); |
| toReturn = new ScopedConnectionWrapper(toClose); |
| } else if (txContext.supportsXA() && xaEnabled) { |
| toClose = dataSource.getConnection(); |
| toReturn = new TxConnectionWrapper(toClose); |
| txContext.registerXAResource(getXAResource(toClose), null); |
| } else if (txContext.supportsLocal() && localEnabled) { |
| toClose = dataSource.getConnection(); |
| toReturn = new TxConnectionWrapper(toClose); |
| txContext.registerLocalResource(getLocalResource(toClose)); |
| } else { |
| throw new TransactionException( |
| "There is a transaction active, but it does not support local participants"); |
| } |
| } catch (Exception sqle) { |
| throw new TransactionException( |
| "There was a problem getting hold of a database connection", |
| sqle); |
| } |
| |
| |
| txContext.postCompletion(x -> { |
| try { |
| toClose.close(); |
| } catch (SQLException sqle) { |
| // TODO log this |
| } |
| }); |
| |
| txContext.putScopedValue(resourceId, toReturn); |
| |
| return toReturn; |
| } |
| |
| |
| private XAResource getXAResource(Connection conn) throws SQLException { |
| if(conn instanceof XAConnectionWrapper) { |
| return ((XAConnectionWrapper)conn).getXaResource(); |
| } else if(conn.isWrapperFor(XAConnectionWrapper.class)){ |
| return conn.unwrap(XAConnectionWrapper.class).getXaResource(); |
| } else { |
| throw new IllegalArgumentException("The XAResource for the connection cannot be found"); |
| } |
| } |
| |
| private LocalResource getLocalResource(Connection conn) { |
| return new LocalResource() { |
| @Override |
| public void commit() throws TransactionException { |
| try { |
| conn.commit(); |
| } catch (SQLException e) { |
| throw new TransactionException( |
| "An error occurred when committing the connection", e); |
| } |
| } |
| |
| @Override |
| public void rollback() throws TransactionException { |
| try { |
| conn.rollback(); |
| } catch (SQLException e) { |
| throw new TransactionException( |
| "An error occurred when rolling back the connection", e); |
| } |
| } |
| |
| }; |
| } |
| } |