java: how to Call Stored Procedure and DB connection from JNDI

gistfile1.java

	
	public static void processData(int param1, int param2)
	{
		
		CallableStatement cs=null;
		Connection conn=null;
		try{			
			// get JNDI JDBC connection
			InitialContext ctxt = new InitialContext();
			DataSource ds = (DataSource) ctxt.lookup("java:/myAppDS");
			conn = ds.getConnection();		
			// Call a procedure with one IN parameter
		    cs = conn.prepareCall("{call process_data_proc(?,?)}");
		    // Set the value for the IN parameter
		    cs.setInt(1, param1);
		    cs.setInt(2, param2);
		    // Execute the stored procedure
		    cs.execute();
			
		}catch(Exception exp)
		{
			exp.printStackTrace();
		}finally
		{
			// This finally clause is always executed - even in error
	        // conditions CallableStatement and Connections will always be closed
	        try
	        {
	                  if (cs != null)
	                	  cs.close();
	        }
	        catch(Exception e) {}

	        try
	        {
	                  if (conn != null)
	                	  conn.close();
	        }
	        catch (Exception e){}
	   }
	}