/*
* HA-JDBC: High-Availability JDBC
* Copyright (C) 2012 Paul Ferraro
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.sf.hajdbc.sync;
import java.io.File;
import java.sql.SQLException;
import net.sf.hajdbc.Database;
import net.sf.hajdbc.DatabaseCluster;
import net.sf.hajdbc.DumpRestoreSupport;
import net.sf.hajdbc.ExceptionType;
import net.sf.hajdbc.Messages;
import net.sf.hajdbc.SynchronizationStrategy;
import net.sf.hajdbc.codec.Decoder;
import net.sf.hajdbc.dialect.Dialect;
import net.sf.hajdbc.util.Files;
/**
* A synchronization strategy that uses dump/restore procedures.
* @author Paul Ferraro
*/
public class DumpRestoreSynchronizationStrategy implements SynchronizationStrategy
{
private static final long serialVersionUID = 5743532034969216540L;
private static final String DUMP_FILE_SUFFIX = ".dump";
private boolean dataOnly = false;
@Override
public String getId()
{
return "dump-restore";
}
public boolean isDataOnly()
{
return this.dataOnly;
}
public void setDataOnly(boolean dataOnly)
{
this.dataOnly = dataOnly;
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.SynchronizationStrategy#init(net.sf.hajdbc.DatabaseCluster)
*/
@Override
public <Z, D extends Database<Z>> void init(DatabaseCluster<Z, D> cluster)
{
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.SynchronizationStrategy#destroy(net.sf.hajdbc.DatabaseCluster)
*/
@Override
public <Z, D extends Database<Z>> void destroy(DatabaseCluster<Z, D> cluster)
{
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.SynchronizationStrategy#synchronize(net.sf.hajdbc.sync.SynchronizationContext)
*/
@Override
public <Z, D extends Database<Z>> void synchronize(SynchronizationContext<Z, D> context) throws SQLException
{
Dialect dialect = context.getDialect();
Decoder decoder = context.getDecoder();
DumpRestoreSupport support = dialect.getDumpRestoreSupport();
if (support == null)
{
throw new SQLException(Messages.DUMP_RESTORE_UNSUPPORTED.getMessage(dialect));
}
try
{
File file = Files.createTempFile(DUMP_FILE_SUFFIX);
try
{
support.dump(context.getSourceDatabase(), decoder, file, this.dataOnly);
support.restore(context.getTargetDatabase(), decoder, file, this.dataOnly);
}
finally
{
Files.delete(file);
}
}
catch (Exception e)
{
throw ExceptionType.SQL.<SQLException>getExceptionFactory().createException(e);
}
}
}