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Log4j has the ability to filter log levels by subject matter for twenty years. In Java you end up having to use that a lot for this reason.


Logging in rust also does that, you can set logging levels for individual modules deep within your dependency tree.


Oh that library that gives you a write() wrapper in exchange for RCE vulns


Log4j is basically a design pattern. If you don’t like the library, Slf4j/logback are based on the same principles.




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