Deprecation: #94313 - AbstractService class
See forge#94313
Description
The \TYPO3\ class is part of the ancient
Service API.
This API did not really prevail, except it's usage for the authentication process.
Since the authentication service related functionality was already
decoupled over the last years, the Abstract got finally
unused in Core since forge#88646. Therefore it has now been marked
as deprecated.
Impact
Extending this class does not raise a deprecation error level log entry.
The class contains only a @deprecated class annotation. Extension classes
can still extend this class in v11 without impact, it will raise a PHP fatal
error in v12, when the class is dropped.
Affected Installations
As mentioned, the Service API never found many usages in casual extensions. It is therefore pretty unlikely that well maintained projects are affected. The extension scanner will find any class usages as a strong match.
Migration
Remove any usage of this class in your extension. In case you currently
extend Abstract for use in an authentication service, which
might be the most common scenario, you have to change your service class
to extend from Abstract instead.
In case you currently extend Abstract for another kind of
service, which is rather unlikely, you have to implement the necessary
methods in your service class yourself. Please see Service Implementation
for more details about the required methods. However, even better would be to
completely migrate away from the Service API (look for General),
since the Core will deprecate these related methods as well.