| /* |
| * 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.daohib.bpel; |
| |
| import org.apache.ode.daohib.SessionManager; |
| import org.apache.ode.daohib.bpel.hobj.HObject; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.hibernate.Query; |
| import org.hibernate.Session; |
| |
| import java.io.Serializable; |
| import java.util.List; |
| |
| /** |
| * Base class for our DAO objects. |
| * <p> |
| * All subclass methods that might trigger SQL queries should log a message in the log category 'org.apache.ode.bpel.DAO' when entered. |
| * A typical message could be "className.methodName". <br/> |
| * Typical candidates are setters, finders and getters of entities. Getters of simple properties won't provide relevant information. |
| */ |
| public abstract class HibernateDao { |
| |
| // logger used by subclasses to track entered methods that may trigger sql query |
| // we don't use the package name to avoid interferences with other logging info. |
| static final Logger logDao = LoggerFactory.getLogger("org.apache.ode.bpel.DAO"); |
| |
| protected final SessionManager _sm; |
| protected final HObject _hobj; |
| |
| protected HibernateDao(SessionManager sessionManager, HObject hobj) { |
| _sm = sessionManager; |
| _hobj = hobj; |
| } |
| |
| void entering(String msg){ |
| // add a prefix to be parser friendly |
| if(logDao.isDebugEnabled()) logDao.debug("entering "+msg); |
| } |
| |
| void leaving(String msg){ |
| if(logDao.isDebugEnabled()) logDao.debug("leaving "+msg); |
| } |
| |
| /** |
| * @see org.apache.ode.utils.dao.DAO#getDHandle() |
| */ |
| public Serializable getDHandle() { |
| return new HibernateHandle(getClass(), _hobj.getClass(), getSession().getIdentifier(_hobj)); |
| } |
| |
| protected Session getSession() { |
| return _sm.getSession(); |
| } |
| |
| public HObject getHibernateObj() { |
| return _hobj; |
| } |
| |
| public Serializable getId() { |
| if( _hobj != null ) { |
| return _hobj.getId(); |
| } |
| return null; |
| } |
| |
| public boolean equals(Object obj) { |
| assert obj instanceof HibernateDao; |
| return _hobj.getId().equals(((HibernateDao) obj)._hobj.getId()); |
| } |
| |
| public int hashCode() { |
| return _hobj.getId().hashCode(); |
| } |
| |
| protected void update() { |
| _sm.getSession().update(_hobj); |
| } |
| |
| @SuppressWarnings("unchecked") |
| protected void deleteByIds(Class entity, List<Long> ids) { |
| deleteByColumn(entity, "id", ids); |
| } |
| |
| @SuppressWarnings("unchecked") |
| protected void deleteByColumn(Class entity, String column, List<Long> values) { |
| if( values != null && values.size() > 0 ) { |
| final String delete = "delete from "+entity.getName()+" as e where e."+column+" in (:values)"; |
| |
| // some databases don't like long lists of values with IN operator |
| // so we delete in batches. Oracle 9i, for instance, doesn't support |
| // more than 1000 -- we opt to be conservative. |
| final int batchSize = 100; |
| |
| int index = 0; |
| while (index < values.size()) { |
| List<Long> subList = values.subList(index, Math.min(index+batchSize, values.size())); |
| Query query = getSession().createQuery(delete); |
| query.setParameterList("values", subList); |
| query.executeUpdate(); |
| index += batchSize; |
| } |
| } |
| } |
| } |