private void initializeDriver(String url) throws SQLException {
    if (mysqlDriver == null) {
      mysqlDriver = DriverManager.getDriver(url);
    }
  }
Setup for data access.
@param inputEndpoints the {@link DbEndpoint}s to use.
@param localDatacenter the name of the local datacenter.
@throws SQLException if setup fails.
ambry-mysql/src/main/java/com/github/ambry/mysql/MySqlDataAccessor.java