/*-------------------------------------------------------------------------
*
* Copyright (c) 2004-2005, PostgreSQL Global Development Group
*
* IDENTIFICATION
* $PostgreSQL: pgjdbc/org/postgresql/ds/PGConnectionPoolDataSource.java,v 1.4 2006/11/29 04:00:15 jurka Exp $
*
*-------------------------------------------------------------------------
*/
package org.postgresql.ds;
import javax.sql.ConnectionPoolDataSource;
import javax.sql.PooledConnection;
import java.sql.SQLException;
import java.io.Serializable;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import java.io.IOException;
import org.postgresql.ds.common.*;
/**
* PostgreSQL implementation of ConnectionPoolDataSource. The app server or
* middleware vendor should provide a DataSource implementation that takes advantage
* of this ConnectionPoolDataSource. If not, you can use the PostgreSQL implementation
* known as PoolingDataSource, but that should only be used if your server or middleware
* vendor does not provide their own. Why? The server may want to reuse the same
* Connection across all EJBs requesting a Connection within the same Transaction, or
* provide other similar advanced features.
*
* <p>In any case, in order to use this ConnectionPoolDataSource, you must set the property
* databaseName. The settings for serverName, portNumber, user, and password are
* optional. Note: these properties are declared in the superclass.</p>
*
* <p>This implementation supports JDK 1.3 and higher.</p>
*
* @author Aaron Mulder ([email protected])
*/
public class PGConnectionPoolDataSource extends BaseDataSource
implements Serializable, ConnectionPoolDataSource {
private boolean defaultAutoCommit = true;
/**
* Gets a description of this DataSource.
*/
public String getDescription() {
return "ConnectionPoolDataSource from "
+ org.postgresql.Driver.getVersion();
}
/**
* Gets a connection which may be pooled by the app server or middleware
* implementation of DataSource.
*
* @throws java.sql.SQLException
* Occurs when the physical database connection cannot be established.
*/
public PooledConnection getPooledConnection() throws SQLException {
return new PGPooledConnection(getConnection(),
defaultAutoCommit);
}
/**
* Gets a connection which may be pooled by the app server or middleware
* implementation of DataSource.
*
* @throws java.sql.SQLException
* Occurs when the physical database connection cannot be established.
*/
public PooledConnection getPooledConnection(String user,
String password) throws SQLException {
return new PGPooledConnection(getConnection(user, password),
defaultAutoCommit);
}
/**
* Gets whether connections supplied by this pool will have autoCommit
* turned on by default. The default value is <tt>false</tt>, so that
* autoCommit will be turned off by default.
*/
public boolean isDefaultAutoCommit() {
return defaultAutoCommit;
}
/**
* Sets whether connections supplied by this pool will have autoCommit
* turned on by default. The default value is <tt>false</tt>, so that
* autoCommit will be turned off by default.
*/
public void setDefaultAutoCommit(boolean defaultAutoCommit) {
this .defaultAutoCommit = defaultAutoCommit;
}
private void writeObject(ObjectOutputStream out) throws IOException {
writeBaseObject(out);
out.writeBoolean(defaultAutoCommit);
}
private void readObject(ObjectInputStream in) throws IOException,
ClassNotFoundException {
readBaseObject(in);
defaultAutoCommit = in.readBoolean();
}
}
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