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package org.postgresql.jdbc3;
import java.util.*;
import org.postgresql.jdbc2.optional.PoolingDataSource;
import org.postgresql.jdbc2.optional.ConnectionPool;
import javax.naming.Reference;
/**
* JDBC 3 implementation of a pooling DataSource. This is best
* used outside of an application server environment. Application
* servers generally prefer to deal with instances of
* ConnectionPoolDataSource (see ConnectionPool) or XADataSource
* (not available for PostgreSQL).
*
* @author Aaron Mulder (ammulder@alumni.princeton.edu)
* @version $Revision: 1.1 $
*/
public class Jdbc3PoolingDataSource extends PoolingDataSource
{
/**
* Store JDBC3 DataSources in different bucket than JDBC2 DataSources
*/
private static Map dataSources = new HashMap();
/**
* Store JDBC3 DataSources in different bucket than JDBC2 DataSources
*/
static Jdbc3PoolingDataSource getDataSource(String name)
{
return (Jdbc3PoolingDataSource) dataSources.get(name);
}
/**
* Store JDBC3 DataSources in different bucket than JDBC2 DataSources
*/
protected void removeStoredDataSource()
{
synchronized (dataSources)
{
dataSources.remove(dataSourceName);
}
}
/**
* Store JDBC3 DataSources in different bucket than JDBC2 DataSources
*/
public void setDataSourceName(String dataSourceName)
{
if (isInitialized())
{
throw new IllegalStateException("Cannot set Data Source properties after DataSource has been used");
}
if (this.dataSourceName != null && dataSourceName != null && dataSourceName.equals(this.dataSourceName))
{
return;
}
synchronized (dataSources)
{
if (getDataSource(dataSourceName) != null)
{
throw new IllegalArgumentException("DataSource with name '" + dataSourceName + "' already exists!");
}
if (this.dataSourceName != null)
{
dataSources.remove(this.dataSourceName);
}
this.dataSourceName = dataSourceName;
dataSources.put(dataSourceName, this);
}
}
/**
* Generates a JDBC3 object factory reference.
*/
protected Reference createReference()
{
return new Reference(getClass().getName(), Jdbc3ObjectFactory.class.getName(), null);
}
/**
* Creates a JDBC3 ConnectionPool to use with this DataSource.
*/
protected ConnectionPool createConnectionPool()
{
return new Jdbc3ConnectionPool();
}
/**
* Gets a description of this DataSource.
*/
public String getDescription()
{
return "JDBC3 Pooling DataSource from " + org.postgresql.Driver.getVersion();
}
}
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