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From Ralph Goers <ralph.go...@dslextreme.com>
Subject Re: Different configuration files for the same ClassLoader
Date Wed, 27 May 2020 15:27:23 GMT
When an application calls LogManager.getLogger() Log4j uses a ContextSelector to locate the
appropriate LoggerContext. The default is the ClassLoaderContextSelector, which will use the
LoggerContext associated with the ClassLoader of the class obtaining the Logger.

To do what you want you would need to create a new ContextSelector that can differentiate
when it should use one LoggerContext over another. You would also need. To be sure that when
each loads its configuration that it somehow can determine which configuration it should use.

Ralph

> On May 27, 2020, at 5:59 AM, CARTEREAU Benjamin <benjamin.cartereau@cnav.fr> wrote:
> 
> Hello,
> I am using log4j2 in a less common environment (webMethods IS java server).
> 
> The thing is that there is a common service that do the logging (using log4j2) for different
"applications" (called "package" in that environment) within the same server.
> 
> I would like to know if there is a way, within the same common service/java code to initialize
a different LoggerContext for each application and using a different "log4j2.xml" configuration
file (these configuration files could use a different name "log4j2-A. xml", "log4j2-B. xml"
or be put in different directories).
> 
> I have been trying to use:
> LoggerContext contextA = Configurator.initialize(pkg, ClassLoader.getSystemClassLoader(),
"log4j2-A.xml");
> But when trying then to create a new context :
> LoggerContext contextB = Configurator.initialize(pkg, ClassLoader.getSystemClassLoader(),
"log4j2-B.xml");
> But without success. I get the message :
> WARN locateContext called with URI log4j2-B.xml. Existing LoggerContext has URI log4j2-A.xml
> 
> I would guess it is the expected behavior since I am using the defaut ContextSelector
(ClassLoaderContextSelector) and I can only have one context (and one configuration file eventually).
> Am I right ?
> Or is there a way to achieve what I am looking for ?
> 
> Best regards.
> 
> Ben
> *****************************************************************************************
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