LogbackLoggingSystem: make getLoggerContext() protected for easy sub-classing

[brenuart]

We'd like to reuse/extend LogbackLoggingSystem with additional custom behaviour. For this we need access to the Logback LoggerContext being configured. Unfortunately, LogbackLoggingSystem.getLoggerContext() is private. Would it be possible to make it protected instead?

[snicoll]

Can you share what you're trying to change please? Maybe we could give you a way to do that without exposing the whole LoggerContext.

[spring-projects-issues]

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[brenuart]

Request was related to issue #4026
In addition, having access to the LoggerContext allows one to reuse existing code and customise the configuration process. One of the examples is register our own log back actions or property resolving mechanism.

[snicoll]

We're cleaning out the issue tracker and closing issues that we've not seen much demand to fix. Feel free to comment with additional justifications if you feel that this one should not have been closed.