the log.hh under the root of the tree was created keep the backward
compatibility when seastar was extracted into a separate library.
so log.hh should belong to `utils` directory, as it is based solely
on seastar, and can be used all subsystems.
in this change, we move log.hh into utils/log.hh to that it is more
modularized. and this also improves the readability, when one see
`#include "utils/log.hh"`, it is obvious that this source file
needs the logging system, instead of its own log facility -- please
note, we do have two other `log.hh` in the tree.
Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
In these changes, we describe the purpose of the type
and make it reusable for other parts of the code.
That includes ditching the existing constructors,
leaving the formatting of its fields to the user
of the interface.
The removed constructors have been replaced by
free functions so that existing code can still
use them the way it did before.
We move the declaration of `description` to dedicated files
to be able to create instances of it from other parts of
the code.
`describe_statement.cc` has been functioning as an
intermediary between objects that can be described
and the end user. It will still perform that duty,
but we want to let other modules be able to generate
descriptions on their own, without having to share
an additional layer of abstraction in form of types
inheriting from `data_dictionary::keyspace_element`.
Those types may not perform any other function than
that and thus may be redundant.
Adjusting `description` to its new purpose will happen
in an upcoming commit.
