code: protected JdbcTemplate jdbcTemplate(Connection conn) {
          DataSource ds = new SingleConnectionDataSource(conn, true);
          return new JdbcTemplate(ds);
      }
docs: Get {@link JdbcTemplate} instance for a given {@link Connection}.
  
  Note: the returned {@link JdbcTemplate} will not automatically close the
  {@link Connection}.
  
  @param conn
  @return