Logback: how to change log directory from “tomcat/bin” to application related?

Question

I want to use slf4j with logback for logging.

You can see my logback.xml below:

Answer 1

Well, I solved my problem but it is not very good solution (by my opinion).

First of all I put absolute path to log file in .property file. For example:

logback.log.location=d:\Tomcat\tomcat_8.0.0-RC5\webapps\module\logs

Then I use that property in my logback.xml:

    
    
        ${logback.log.location}\module.log
        
            
                %date %level [%thread] %logger{10} [%file:%line] %msg%n
            
        
    

    
        
    

More details you can see here. This is an example, that I use.

But in solution above we have environment specific absolute path to the logs. This is ugly. Of course, we can use system variable CATALINA_HOME to avoid absolute path. But, as I know, CATALINA_HOME can be undefined. Or, we can use another instance of tomcat, that is not in CATALINA_HOME.

Maybe someone have more nice solution that will be environment independent?

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UPDATE

Another solution:

Just use relative (to tomcat\bin) path instead absolute in logback.xml:

    
        ..\webapps\module\module.log
        
            
                %date %level [%thread] %logger{10} [%file:%line] %msg%n
            
        
    

    
        
    

It was the first idea, that I try to implement. I don't know, why it didn't work before. Maybe there were other problems. Moreover this and this articles confused me.

But now this solution work fine. This is exactly that I am looking for =)