Logback logger name with wildcard

Question

Is it possible to use a wildcard for the logger name which matches different packages so we don\'t have to specify them all individually? So instead of writing

&         


        

Answer 1

You can do that with Filters in the appender. Basically you have to set up a logger for com.* with DEBUG level, and apply a filter which DENIES all DEBUG (or lower) events which are NOT com.*.web.

I admit that it is quite convoluted.

Performance-wise it is also poor: DEBUG events are created for all com.* events, and only at the appender they are thrown away or kept.

Anyway, example logback.xml file:

    
        
            
                
                    !(e.loggerName ==~ "com\\..*\\.web") &&
                    DEBUG.toInt() >= e.level.toInt()
                
            
            NEUTRAL
            DENY
        
        
            %p [%d{HH:mm:ss,SSS}] %c - %m\n
        
    

    

    
        
    

Test code:

public void test() throws Exception{
    getLogger("com.package1.web").debug("some debug onto com.package1.web");
    getLogger("com.package2.web").debug("some debug onto com.package2.web");
    getLogger("com.package3.web").debug("some debug onto com.package3.web");
    getLogger("com.package1.web").info("some info onto com.package1.web");
    getLogger("com.package2.web").info("some info onto com.package2.web");
    getLogger("com.package3.web").info("some info onto com.package3.web");
    getLogger("com.package3.notweb").debug("some debug onto com.package3.notweb");
    getLogger("com.package3.notweb").info("some info onto com.package3.notweb");
}

public Logger getLogger(String loggerName) {
    return LoggerFactory.getLogger(loggerName);
}

Result:

DEBUG [12:30:46] com.package1.web - some debug onto com.package1.web
DEBUG [12:30:46] com.package2.web - some debug onto com.package2.web
DEBUG [12:30:46] com.package3.web - some debug onto com.package3.web
INFO [12:30:46] com.package1.web - some info onto com.package1.web
INFO [12:30:46] com.package2.web - some info onto com.package2.web
INFO [12:30:46] com.package3.web - some info onto com.package3.web
INFO [12:30:46] com.package3.notweb - some info onto com.package3.notweb

as you can see, DEBUG logs are written only for com.*.web.