/**
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided
* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
* statements and notices. Redistributions must also contain a
* copy of this document.
*
* 2. Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. The name "Exolab" must not be used to endorse or promote
* products derived from this Software without prior written
* permission of Exoffice Technologies. For written permission,
* please contact info@exolab.org.
*
* 4. Products derived from this Software may not be called "Exolab"
* nor may "Exolab" appear in their names without prior written
* permission of Exoffice Technologies. Exolab is a registered
* trademark of Exoffice Technologies.
*
* 5. Due credit should be given to the Exolab Project
* (http://www.exolab.org/).
*
* THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 2005 (C) Exoffice Technologies Inc. All Rights Reserved.
*
* $Id: MasterMessageStore.java,v 1.2 2005/10/20 14:07:03 tanderson Exp $
*/
package org.exolab.jms.tools.migration.master;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.jms.JMSException;
import org.exolab.jms.message.MessageImpl;
import org.exolab.jms.persistence.DatabaseService;
import org.exolab.jms.persistence.PersistenceException;
import org.exolab.jms.persistence.SQLHelper;
import org.exolab.jms.tools.migration.Store;
import org.exolab.jms.tools.migration.StoreIterator;
/**
* <code>MasterMessageStore</code> manages a collection of persistent
* messages.
*
* @author <a href="mailto:tma#netspace.net.au">Tim Anderson</a>
* @version $Revision: 1.2 $ $Date: 2005/10/20 14:07:03 $
*/
public class MasterMessageStore implements Store {
/**
* The database service.
*/
private DatabaseService _database;
/**
* Construct a new <code>MasterDestinationStore</code>.
*
* @param database the database service
*/
public MasterMessageStore(DatabaseService database) {
_database = database;
}
/**
* Export the messages.
*
* @return an iterator over the collection
* @throws JMSException for any JMS error
* @throws PersistenceException for any persistence error
*/
public StoreIterator exportCollection() throws JMSException,
PersistenceException {
List ids = getMessageIds();
return new MessageIterator(ids);
}
/**
* Import messages into the store.
*
* @param iterator an iterator over the collection
* @throws JMSException for any JMS error
* @throws PersistenceException for any persistence error
*/
public void importCollection(StoreIterator iterator)
throws JMSException, PersistenceException {
Connection connection = _database.getConnection();
while (iterator.hasNext()) {
MessageImpl message = (MessageImpl) iterator.next();
_database.getAdapter().addMessage(connection, message);
}
_database.commit();
}
/**
* Returns the number of elements in the collection.
*
* @return the number of elements in the collection
* @throws PersistenceException for any persistence error
*/
public int size() throws PersistenceException {
return getMessageIds().size();
}
/**
* Returns a list of all message identifiers.
*
* @return a list of all message identifiers.
* @throws PersistenceException for any persistence error
*/
private List getMessageIds() throws PersistenceException {
List result = new ArrayList(1000);
final String query
= "select messageId from messages order by createTime";
Connection connection = _database.getConnection();
PreparedStatement select = null;
ResultSet set = null;
try {
select = connection.prepareStatement(query);
set = select.executeQuery();
while (set.next()) {
result.add(set.getString(1));
}
} catch (SQLException exception) {
throw new PersistenceException("Failed to execute query: " + query,
exception);
} finally {
SQLHelper.close(set);
SQLHelper.close(select);
}
_database.commit();
return result;
}
private class MessageIterator implements StoreIterator {
private final Iterator _iterator;
public MessageIterator(List ids) {
_iterator = ids.iterator();
}
public boolean hasNext() {
return _iterator.hasNext();
}
public Object next() throws PersistenceException {
MessageImpl result = null;
String id = (String) _iterator.next();
Connection connection = _database.getConnection();
result = _database.getAdapter().getMessage(connection, id);
_database.commit();
return result;
}
}
}