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package com.sun.appserv.jdbc;
import java.sql.Connection;
import java.sql.SQLException;
/**
* The javax.sql.DataSource
implementation of SunONE application
* server will implement this interface. An application program would be able
* to use this interface to do the extended functionality exposed by SunONE
* application server.
*
A sample code for getting driver's connection implementation would like * the following. *
InitialContext ic = new InitialContext(); com.sun.appserv.DataSource ds = (com.sun.appserv.DataSOurce) ic.lookup("jdbc/PointBase"); Connection con = ds.getConnection(); Connection drivercon = ds.getConnection(con); // Do db operations. con.close();* * @author Binod P.G */ public interface DataSource extends javax.sql.DataSource { /** * Retrieves the actual SQLConnection from the Connection wrapper * implementation of SunONE application server. If an actual connection is * supplied as argument, then it will be just returned. * * @param con Connection obtained from
Datasource.getConnection()
* @return java.sql.Connection
implementation of the driver.
* @throws java.sql.SQLException
If connection cannot be obtained.
*/
public Connection getConnection(Connection con) throws SQLException;
/**
* Gets a connection that is not in the scope of any transaction. This
* can be used to save performance overhead incurred on enlisting/delisting
* each connection got, irrespective of whether its required or not.
* Note here that this meethod does not fit in the connector contract
* per se.
*
* @return java.sql.Connection
* @throws java.sql.SQLException
If connection cannot be obtained
*/
public Connection getNonTxConnection() throws SQLException;
/**
* Gets a connection that is not in the scope of any transaction. This
* can be used to save performance overhead incurred on enlisting/delisting
* each connection got, irrespective of whether its required or not.
* Note here that this meethod does not fit in the connector contract
* per se.
*
* @param user User name for authenticating the connection
* @param password Password for authenticating the connection
* @return java.sql.Connection
* @throws java.sql.SQLException
If connection cannot be obtained
*/
public Connection getNonTxConnection( String userName, String password )
throws SQLException;
/**
* API to mark a connection as bad. If the application can determine that the connection
* is bad, using this api, it can notify the resource-adapter which inturn will notify the
* connection-pool. Connection-pool will drop and create a new connection.
* eg:
* com.sun.appserv.jdbc.DataSource ds= (com.sun.appserv.jdbc.DataSource)context.lookup("dataSource"); Connection con = ds.getConnection(); Statement stmt = null; try{ stmt = con.createStatement(); stmt.executeUpdate("Update"); }catch(BadConnectionException e){ dataSource.markConnectionAsBad(con) //marking it as bad for removal }finally{ stmt.close(); con.close(); //Connection will be destroyed while close or Tx completion } ** @param conn
java.sql.Connection
*/
public void markConnectionAsBad(Connection conn);
}