ERROR : Static Logger Usage

[Gurkan Erdogdu <gu...@yahoo.com>]

Hello folks,

As you have already know, we have been using "static loggers" in our codes. But 
using those libraries in Java EE containers, problems have occured. 


For example, in Tomcat, Loggers are configured per classloader. When application 
is undeployed all of the handlers of application loggers are removed. Therefore, 
after undeploying the first applications, other applications that use the same 
class are suffered from logging. i.e

For example,

private static final WebBeansLogger logger = .....

When first application is deployed, it sets logger. When it is undeplyed, logger 
is reset and no application is able to use it.

I think to change all loggers from static to normal ? 

WDYT?

Thanks;

--Gurkan

Re: ERROR : Static Logger Usage

[Gerhard <ge...@gmail.com>]

hi,

+1 (see [1] and esp. [2]).

just if there are really a lot of instances of a class, we would see a
noticeable performance impact -> we have to treat such cases differently.

furthermore, it's possible to benefit from inheritance - e.g. in case of
jul:
protected final Logger logger = Logger.getLogger(getClass().getName());

regards,
gerhard

[1] http://www.slf4j.org/faq.html#declared_static
[2] http://wiki.apache.org/commons/Logging/StaticLog

http://www.irian.at

Your JSF powerhouse -
JSF Consulting, Development and
Courses in English and German

Professional Support for Apache MyFaces



2010/8/20 Gurkan Erdogdu <gu...@yahoo.com>

> Hello folks,
>
> As you have already know, we have been using "static loggers" in our codes.
> But
> using those libraries in Java EE containers, problems have occured.
>
>
> For example, in Tomcat, Loggers are configured per classloader. When
> application
> is undeployed all of the handlers of application loggers are removed.
> Therefore,
> after undeploying the first applications, other applications that use the
> same
> class are suffered from logging. i.e
>
> For example,
>
> private static final WebBeansLogger logger = .....
>
> When first application is deployed, it sets logger. When it is undeplyed,
> logger
> is reset and no application is able to use it.
>
> I think to change all loggers from static to normal ?
>
> WDYT?
>
> Thanks;
>
> --Gurkan
>
>
>