* Also simplified the srvCache variable usage to be unconditional.
* The wfRandomString() call has also been replaced.
Change-Id: I17e83b17ec549906ee200bbe9eb2f0b151423e26
* This avoids code duplication.
* Callers can safely start type-hinting StatusValue as well.
* Also moved the wrap() logic out of Status::__construct(), which
only wrap() was (and should have been) using. Use "static" as
well, so subclass behave properly.
* The docs and type-hints in /filebackend are updated as an example.
* A migration pattern is to inject a StatusValue wrapper
into the backend and use it on all returned statuses, so MediaWiki
will still get Status for message methods.
Change-Id: Iff9255f34870ea6b0c4b91f6ddc69eea95186aba
* Do not do the connection init step if the same DB handle as
wfGetDB( DB_MASTER ) is being used to avoid clobbering it.
* Remove begin(), since only one of the subclasses wants
transactions. That one now uses startAtomic() now.
* Make getConnection() throw an error for bad config instead
of return null, which was not documented or expected.
Change-Id: Ib09a7972d6569c29e83e329a8f7f9f47a393b896
