| /* |
| * 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 WARRANTIES OR 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.ode.bpel.engine; |
| |
| |
| |
| import javax.xml.namespace.QName; |
| |
| import org.apache.ode.bpel.dao.BpelDAOConnection; |
| import org.apache.ode.bpel.dao.BpelDAOConnectionFactory; |
| import org.apache.ode.bpel.iapi.Scheduler; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| /** |
| * Encapsulates transactional access to the BPEL database. |
| */ |
| public class BpelDatabase { |
| static Log __log = LogFactory.getLog(BpelDatabase.class); |
| |
| protected BpelDAOConnectionFactory _sscf; |
| protected Scheduler _scheduler; |
| |
| BpelDatabase(BpelDAOConnectionFactory sscf, Scheduler scheduler) { |
| if (sscf == null) |
| throw new NullPointerException("sscf is null!"); |
| if (scheduler == null) |
| throw new NullPointerException("scheduler is null!"); |
| |
| _sscf = sscf; |
| _scheduler = scheduler; |
| |
| } |
| |
| /** |
| * Get a connection to the database with the correct store identifier. |
| * @return a state store connection |
| * @throws org.apache.ode.utils.dao.DConnectionException |
| */ |
| BpelDAOConnection getConnection() { |
| // Note: this will give us a connection associated with the current |
| // transaction, so no need to worry about closing it. |
| return _sscf.getConnection(); |
| } |
| |
| BpelProcessDatabase getProcessDb(QName pid) { |
| return new BpelProcessDatabase(_sscf, _scheduler, pid); |
| } |
| |
| /** |
| * Execute a self-contained database transaction. |
| * @param callable database transaction |
| * @return |
| * @throws DConnectionException |
| */ |
| public <T> T exec(final Callable<T> callable) throws Exception { |
| return _scheduler.execTransaction(new java.util.concurrent.Callable<T>() { |
| public T call() throws Exception { |
| return callable.run(_sscf.getConnection()); |
| } |
| }); |
| } |
| |
| public interface Callable<T> { |
| public T run(BpelDAOConnection conn) throws Exception; |
| } |
| } |