Nullpointer Exception when i do lookup for sqlserver 2000
Hi,
Guys please help me asap i stuck here from past 1 week.
This is kaladhar, i have installed java 1.4 and jboss3.2 on linux. I have installed sqlserver type 4 driver also( jtds.jdbc.Driver).
I have written a small program which connects to the sqlserver database which is on remote machine(win 2000).
I am getting initial context object, but when i do lookup, i am getting NullPointerException. following is the code
--------------------------------------------------------
import javax.sql.*;
import java.sql.*;
import javax.naming.*;
import java.util.*;
/**
* Microsoft SQL Server JDBC test program
*/
public class ConnectSQL
{
public ConnectSQL() {
// Get connection
System.out.println("Kaladhar-1");
try
{
//Class.forName("net.sourceforge.jtds.jdbc.Driver");
Connection connection = getConnection("java:/MSSQL");
System.out.println("Kaladhar-3" );
if (connection != null)
{
System.out.println();
System.out.println("Successfully connected");
System.out.println();
// Meta data
DatabaseMetaData meta = connection.getMetaData();
System.out.println("\nDriver Information");
System.out.println("Driver Name: "
+ meta.getDriverName());
System.out.println("Driver Version: "
+ meta.getDriverVersion());
System.out.println("\nDatabase Information ");
System.out.println("Database Name: "
+ meta.getDatabaseProductName());
System.out.println("Database Version: "+
meta.getDatabaseProductVersion());
}
}catch (Exception e)
{
e.printStackTrace();
}
} // Test
public static void main (String args[]) throws Exception
{
ConnectSQL cSQL = new ConnectSQL();
}
private Connection getConnection(String SPoolName)
{
Connection conn = null;
Statement st = null;
ResultSet rs = null;
DataSource ds = null;
InitialContext ctx = null;
try
{
Properties prop = new Properties();
prop.put(Context.INITIAL_CONTEXT_FACTORY,"org.jnp.interfaces.Nam
ingContextFactory");
prop.put(Context.PROVIDER_URL,"jnp://192.168.175.42:1099/");
prop.put(Context.URL_PKG_PREFIXES,"org.jboss.naming:org.jnp.inte
rfaces");
ctx = new InitialContext(prop);
System.out.println("OBJECT---" + ctx);
//ctx = new InitialContext();
ds =(DataSource)ctx.lookup(SPoolName);
System.out.println("OBJECT DS" + ds);
conn = ds.getConnection();
System.out.println("OBJECT" + conn);
//System.out.println("From cDBAccess.getConnection(), poolname: " +
// SPoolName + " Datasource is: " + ds + " Connection is: " + con
n);
}
catch(NamingException e)
{
//System.out.println("Naming Exception while getting connection...1"
);
System.out.println("EXCEPTION IN DBACCESS DB NAMING EXCEPTION:"+e.ge
tMessage());
e.printStackTrace();
}
catch(SQLException ex)
{
//System.out.println("Exception while getting connection...2");
System.out.println("EXCEPTION IN DBACCESS LOOKUP:"+ex.getMessage());
ex.printStackTrace();
}catch(Exception e)
{
System.out.println("EXCEPTION IN Kaladhar:");
e.printStackTrace();
}
return conn;
}//end of getConnection()
}
