Implementation of RowCallbackHandler. Convenient superclass for callback handlers. An instance can only be used once.
We can either use this on its own (for example, in a test case, to ensure that our result sets have valid dimensions), or use it as a superclass for callback handlers that actually do something, and will benefit from the dimension information it provides.
A usage example with JdbcTemplate:
JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource); // reusable object
RowCountCallbackHandler rowCountCallback = new RowCountCallbackHandler(); // not reusable
jdbcTemplate.query(“select * from user”, countCallback);
int rowCount = countCallback.getRowCount();
We can either use this on its own (for example, in a test case, to ensure that our result sets have valid dimensions), or use it as a superclass for callback handlers that actually do something, and will benefit from the dimension information it provides.
A usage example with JdbcTemplate:
JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource); // reusable object RowCountCallbackHandler countCallback = new RowCountCallbackHandler(); // not reusable jdbcTemplate.query("select * from user", countCallback); int rowCount = countCallback.getRowCount();