Yes, Log4j2 has an environment Lookup to access OS environment variables.
Ralph
On Sep 11, 2013, at 11:21 AM, WebServices Development wrote:
> Thank you, I shall check it out.
>
> If instead of System variable ( using a -Dxxx on a VM ), if I want to use the
> Environment variable, can I use env in a similar manner. I.e. is it valid to
> say <param-value>file://etc/myApp/mylogging-${env:region}.xml</param-value>?
>
>
> -----Original Message-----
> From: Ralph Goers [mailto:[email protected]]
> Sent: Wednesday, September 11, 2013 11:26 AM
> To: Log4J Users List
> Subject: Re: Defining different log4j2.xml configurations based on environment
>
> Have you looked at http://logging.apache.org/log4j/2.x/manual/webapp.html?
> The documentation there is missing one thing that will probably help you.
> You can specify
>
> <context-param>
> <param-name>log4jConfiguration</param-name>
> <param-value>file://etc/myApp/mylogging-${sys:region}.xml</param-value>
> </context-param>
>
> If you then set the region system property to "prod" you would use
> mylogging-prod.xml.
>
> Ralph
>
>
> On Sep 11, 2013, at 4:21 AM, WebServices Development wrote:
>
>> I had posted this on SO and was advised that it may be better to post this
>> question on this list.
>>
>> I want to try and use logj2 in my web application. With log4j 1.x, we
>> set-up different configurations files based on environment and use
>> ServletContextListener to load the appropriate configuration using a
>> call like
>>
>> DOMConfigurator.configureAndWatch(logConfigFile, delay);
>>
>> by passing the config file location.
>>
>> I was planning on doing the same for log4j2 config file but according to
>> this<http://stackoverflow.com/questions/16716556/how-to-specify-log4j-2-x-config-location>
>>
>> (http://stackoverflow.com/questions/16716556/how-to-specify-log4j-2-x-config-location
>> ) and
>> this<http://stackoverflow.com/questions/16778986/log4j-only-can-view-error-level-on-my-java-enterprise-application-module-ejb-wi>
>>
>> (http://stackoverflow.com/questions/16778986/log4j-only-can-view-error-level-on-my-java-enterprise-application-module-ejb-wi
>> ), it is not possible or advisable to use DOMConfigurator with log4j2.
>>
>> So, my question is: How can I use different configuration files based on
>> environment with log4j2?
>>
>> I am not trying to have separate logfiles for each web application within an
>> EAR, but a separate config file for each of the environments, so that, for
>> example, I can have DEBUG in dev and UAT, but not in PROD or can have large
>> file sizes in dev and uat, but not in prod. Like I mentioned in the
>> question, what we do with version 1 is that we have, say, log4j-dev.xml,
>> log4j-prod.xml etc. and have a servlet context listener and an env variable
>> such that without making code changes, when I deploy the app to an env, it
>> picks up correct config.
>>
>> Thank you
>
>
>
>
>
>
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