Question

I want to use default SLF4J + Logback configuration except setting org.springframework.data.document.mongodb logging level to DEBUG.

How can I do it with Java code?

I’m not using XML, and this decision made at runtime.

Answer 1

The following works for me but generally this is not a good idea. Your code will depend on Logback (you can’t choose another logging framework behind SLF4J).

final org.slf4j.Logger logger = 
    org.slf4j.LoggerFactory.getLogger("test.package");
if (!(logger instanceof ch.qos.logback.classic.Logger)) {
    return;
}
ch.qos.logback.classic.Logger logbackLogger = 
    (ch.qos.logback.classic.Logger) logger;
logbackLogger.setLevel(ch.qos.logback.classic.Level.TRACE);
logger.trace("some log");