/**
SpagoBI - The Business Intelligence Free Platform
Copyright (C) 2005-2010 Engineering Ingegneria Informatica S.p.A.
This library 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 library 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 library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
**/
package it.eng.qbe.datasource.jpa;
import it.eng.qbe.datasource.IDataSource;
import it.eng.qbe.datasource.IDriver;
import it.eng.qbe.datasource.configuration.IDataSourceConfiguration;
import it.eng.qbe.datasource.naming.SimpleDataSourceNamingStrategy;
import it.eng.spagobi.utilities.exceptions.SpagoBIRuntimeException;
import java.util.HashMap;
import java.util.Map;
import org.apache.log4j.Logger;
/**
* @author Andrea Gioia (andrea.gioia@eng.it)
*
*/
public class JPADriver implements IDriver {
protected boolean dataSourceCacheEnabled;
protected int openedDataSource;
protected int maxDataSource;
public static final String DRIVER_ID = "jpa";
protected static final Map<String, IDataSource> cache = new HashMap<String, IDataSource>();
protected static final SimpleDataSourceNamingStrategy namingStrategy = new SimpleDataSourceNamingStrategy();
/** Logger component. */
public static transient Logger logger = Logger.getLogger(JPADriver.class);
public JPADriver() {
dataSourceCacheEnabled = true;
openedDataSource = 0;
maxDataSource = -1;
}
public String getName() {
return DRIVER_ID;
}
public IDataSource getDataSource(IDataSourceConfiguration configuration) {
IDataSource dataSource;
String dataSourceName;
if(maxDataSource > 0 && openedDataSource == maxDataSource) {
throw new SpagoBIRuntimeException("Maximum number of open data sources reached");
}
dataSource = null;
dataSourceName = namingStrategy.getDataSourceName(configuration);
if(dataSourceCacheEnabled) {
logger.debug("The Data source cache is enabled");
dataSource = cache.containsKey(dataSourceName)?
cache.get(dataSourceName):
new JPADataSource(dataSourceName, configuration);
} else {
logger.debug("The Data source cache is not enabled");
dataSource = new JPADataSource(dataSourceName, configuration);
}
openedDataSource++;
return dataSource;
}
public void setDataSourceCacheEnabled(boolean enabled) {
dataSourceCacheEnabled = enabled;
}
public boolean isDataSourceCacheEnabled() {
return dataSourceCacheEnabled;
}
public void setMaxDataSource(int n) {
maxDataSource = n;
}
public boolean acceptDataSourceConfiguration() {
// TODO Auto-generated method stub
return true;
}
}