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/*
* Copyright (c) 2000, 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package javax.sql;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Wrapper;
/**
* A factory for connections to the physical data source that this
* DataSource object represents. An alternative to the
* DriverManager facility, a DataSource object
* is the preferred means of getting a connection. An object that implements
* the DataSource interface will typically be
* registered with a naming service based on the
* JavaTM Naming and Directory (JNDI) API.
*
* The DataSource interface is implemented by a driver vendor.
* There are three types of implementations:
*
* - Basic implementation -- produces a standard
Connection
* object
* - Connection pooling implementation -- produces a
Connection
* object that will automatically participate in connection pooling. This
* implementation works with a middle-tier connection pooling manager.
* - Distributed transaction implementation -- produces a
*
Connection object that may be used for distributed
* transactions and almost always participates in connection pooling.
* This implementation works with a middle-tier
* transaction manager and almost always with a connection
* pooling manager.
*
*
* A DataSource object has properties that can be modified
* when necessary. For example, if the data source is moved to a different
* server, the property for the server can be changed. The benefit is that
* because the data source's properties can be changed, any code accessing
* that data source does not need to be changed.
*
* A driver that is accessed via a DataSource object does not
* register itself with the DriverManager. Rather, a
* DataSource object is retrieved though a lookup operation
* and then used to create a Connection object. With a basic
* implementation, the connection obtained through a DataSource
* object is identical to a connection obtained through the
* DriverManager facility.
*
* @since 1.4
*/
public interface DataSource extends CommonDataSource,Wrapper {
/**
*
Attempts to establish a connection with the data source that
* this DataSource object represents.
*
* @return a connection to the data source
* @exception SQLException if a database access error occurs
*/
Connection getConnection() throws SQLException;
/**
*
Attempts to establish a connection with the data source that
* this DataSource object represents.
*
* @param username the database user on whose behalf the connection is
* being made
* @param password the user's password
* @return a connection to the data source
* @exception SQLException if a database access error occurs
* @since 1.4
*/
Connection getConnection(String username, String password)
throws SQLException;
}