/*
* 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.bpel.dao.MessageRouteDAO;
import org.apache.ode.bpel.dao.ProcessInstanceDAO;
import org.apache.ode.daohib.SessionManager;
import org.apache.ode.daohib.bpel.hobj.HCorrelatorSelector;
import org.apache.ode.daohib.bpel.hobj.HProcessInstance;
import org.hibernate.Query;
/**
* Hibernate-based {@link MessageRouteDAO} implementation.
*/
class MessageRouteDaoImpl extends HibernateDao implements MessageRouteDAO {
private static final String LOCK_INSTANCE = "update " + HProcessInstance.class.getName()
+ " set lock=lock+1 where id=?";
private HCorrelatorSelector _selector;
private boolean _locked = false;
public MessageRouteDaoImpl(SessionManager sm, HCorrelatorSelector hobj) {
super(sm, hobj);
_selector = hobj;
}
/**
* @see org.apache.ode.bpel.dao.MessageRouteDAO#getTargetInstance()
*/
public ProcessInstanceDAO getTargetInstance() {
// First we need to reliably lock the instance:
if (!_locked) {
Query q = getSession().createQuery(LOCK_INSTANCE);
q.setLong(0, _selector.getInstance().getId());
q.executeUpdate();
_locked = true;
}
// now it is safe to return
return new ProcessInstanceDaoImpl(_sm, _selector.getInstance());
}
public String getGroupId() {
return _selector.getGroupId();
}
public int getIndex() {
return _selector.getIndex();
}
}