SpringData Jdbc JdbcTemplate.queryForStream metodu

Giriş

Açıklaması şöyle

In the Spring Framework, the QueryByStream feature provides a powerful mechanism to fetch data from a database and process it in a streaming fashion, offering significant advantages in terms of efficiency and performance. This approach becomes particularly valuable when dealing with large datasets or requiring continuous data processing.

Açıklaması şöyle

Using the try-with-resources block ensures that the necessary resources are properly managed and released after processing the stream.

queryForStream - String sql, RowMapper +  Object... args

İmzası şöyle

<T> Stream<T> queryForStream(String sql, RowMapper<T> rowMapper, Object... args)

Örnek

Şöyle yaparız

public Optional<User> findById(Integer id) {
  try (Stream<User> stream = jdbcTemplate
        .queryForStream("select * from users where id=?", userMapper, id)) {
   return stream.findAny();
  }
}