Hi I am using slf4j over log4j2. How do I change log path dynamically?
My log4j2.xml looks like
<Properties>
<Property name="home">/path/logs</Property>
</Properties>
<Appenders>
<RollingFile name="default" fileName="${home}/error.log"
filePattern="...">
.......
</RollingFile>
</Appenders>
Is there any way I can change the path where logs will be written at runtime?
I tried with having system property in the path and setting it in runtime but log4j2 does not consider the updated value. System properties approach-
<RollingFile name="default" fileName="${sys:home}/error.log"
filePattern="...">
(In java class: System.setProperty("home","/newPath"))
Does this require reconfiguration. I don't see any exposed service of slf4j to reconfigure.
Use DOMConfigurator.doConfigure() , where the second parameter is LogManager.getLoggerRepository()
. This way you can change not just logging path, but everything else too, including levels for specific loggers, for example.
I don't think you can reconfigure SLF4j implementation using "implementation-agnostic" way. When we switched our application from Log4j to Logback, we also changed the way configuration file is re-read in runtime. For Logback this uses JoranConfigurator.doConfigure()
.
The only solution i got is using context variable.
MDC.put("logLocation","path/to/log")
In log4j2.xml
<RollingFile name="default" fileName="${ctx:logLocation}/error.log"
filePattern="...">
However the catch is , for each thread the context should have this variable(logLocation) set
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