/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.services.jcr.impl.storage.jdbc.optimisation.db;
import org.exoplatform.services.jcr.datamodel.NodeData;
import org.exoplatform.services.jcr.datamodel.PropertyData;
import org.exoplatform.services.jcr.impl.storage.jdbc.DBConstants;
import org.exoplatform.services.jcr.impl.storage.jdbc.JDBCDataContainerConfig;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashSet;
import java.util.Set;
import javax.jcr.InvalidItemStateException;
import javax.jcr.RepositoryException;
/**
* Created by The eXo Platform SAS
*
* 20.03.2007
*
* @author <a href="mailto:peter.nedonosko@exoplatform.com.ua">Peter Nedonosko</a>
* @version $Id$
*/
public class MySQLMultiDbJDBCConnection extends MultiDbJDBCConnection
{
/**
* Keeping identifiers of deleted nodes in memory for improving performance
* and avoiding issue with batching update.
*/
protected final Set<String> addedNodes = new HashSet<String>();
/**
* Indicates if we have deal with MySQL innoDB engine, which supports foreign keys.
*/
protected final boolean innoDBEngine;
protected static final String PATTERN_ESCAPE_STRING = "\\\\";
/**
* MySQL Multidatabase JDBC Connection constructor.
*
* @param dbConnection
* JDBC connection, should be opened before
* @param readOnly
* boolean if true the dbConnection was marked as READ-ONLY.
* @param containerConfig
* Workspace Storage Container configuration
*/
public MySQLMultiDbJDBCConnection(Connection dbConnection, boolean readOnly, JDBCDataContainerConfig containerConfig)
throws SQLException
{
super(dbConnection, readOnly, containerConfig);
this.innoDBEngine =
containerConfig.dbDialect.equals(DBConstants.DB_DIALECT_MYSQL)
|| containerConfig.dbDialect.equals(DBConstants.DB_DIALECT_MYSQL_UTF8);
}
/**
* {@inheritDoc}
*/
@Override
protected void prepareQueries() throws SQLException
{
super.prepareQueries();
FIND_NODE_MAIN_PROPERTIES_BY_PARENTID_CQ =
FIND_NODE_MAIN_PROPERTIES_BY_PARENTID_CQ.replace("from " + JCR_ITEM + " I, " + JCR_VALUE + " V", "from "
+ JCR_ITEM + " I force index (" + JCR_IDX_ITEM_PARENT_NAME + "), " + JCR_VALUE + " V force index ("
+ JCR_IDX_VALUE_PROPERTY + ")");
FIND_NODES_AND_PROPERTIES =
FIND_NODES_AND_PROPERTIES.replace("from " + JCR_ITEM + " I", "from " + JCR_ITEM + " I force index (PRIMARY)");
FIND_ITEM_BY_NAME = "select * from " + JCR_ITEM + " where PARENT_ID=? and NAME=? and I_INDEX=? order by I_CLASS";
if (containerConfig.useSequenceForOrderNumber)
{
FIND_LAST_ORDER_NUMBER = "SELECT " + JCR_ITEM_NEXT_VAL + "('LAST_N_ORDER_NUM', ?, ?) as nextVal";
}
FIND_NODES_BY_PARENTID_CQ =
FIND_NODES_BY_PARENTID_CQ.replace("from " + JCR_ITEM + " I, " + JCR_ITEM + " P, " + JCR_VALUE + " V", "from "
+ JCR_ITEM + " I force index (" + JCR_IDX_ITEM_N_ORDER_NUM + "), " + JCR_ITEM + " P force index("
+ JCR_IDX_ITEM_PARENT_NAME + "), " + JCR_VALUE + " V force index (" + JCR_IDX_VALUE_PROPERTY + ")");
}
/**
* {@inheritDoc}
*/
@Override
protected int addNodeRecord(NodeData data) throws SQLException, InvalidItemStateException, RepositoryException
{
// check if parent exists
if (isParentValidationNeeded(data.getParentIdentifier()))
{
ResultSet item = findItemByIdentifier(data.getParentIdentifier());
try
{
if (!item.next())
{
throw new SQLException("Parent is not found. Behaviour of " + JCR_FK_ITEM_PARENT);
}
}
finally
{
try
{
item.close();
}
catch (SQLException e)
{
LOG.error("Can't close the ResultSet: " + e);
}
}
}
if (!innoDBEngine)
{
addedNodes.add(data.getIdentifier());
}
return super.addNodeRecord(data);
}
/**
* {@inheritDoc}
*/
public void delete(NodeData data) throws RepositoryException, UnsupportedOperationException,
InvalidItemStateException, IllegalStateException
{
addedNodes.remove(data.getIdentifier());
super.delete(data);
}
/**
* {@inheritDoc}
*/
@Override
protected int addPropertyRecord(PropertyData data) throws SQLException, InvalidItemStateException,
RepositoryException
{
// check if parent exists
if (isParentValidationNeeded(data.getParentIdentifier()))
{
ResultSet item = findItemByIdentifier(data.getParentIdentifier());
try
{
if (!item.next())
{
throw new SQLException("Parent is not found. Behaviour of " + JCR_FK_ITEM_PARENT);
}
}
finally
{
try
{
item.close();
}
catch (SQLException e)
{
LOG.error("Can't close the ResultSet: " + e);
}
}
}
return super.addPropertyRecord(data);
}
@Override
protected String getLikeExpressionEscape()
{
// must be .. LIKE 'prop\\_name' ESCAPE '\\\\'
return PATTERN_ESCAPE_STRING;
}
/**
* {@inheritDoc}
*/
@Override
public void close() throws IllegalStateException, RepositoryException
{
addedNodes.clear();
super.close();
}
/**
* Returns if parent validation is needed. Some MySQL engines does not support
* foreign keys, such as MyISAM or NDP, that why is need to execute additional
* query.
*/
protected boolean isParentValidationNeeded(String parentIdentifier)
{
return !innoDBEngine && parentIdentifier != null && !addedNodes.contains(parentIdentifier);
}
}