I would like the ability to get the ConfigurationSource from the LoggerContext in order to fix LOG4J2-539 <https://issues.apache.org/jira/browse/LOG4J2-539>.
Currently LoggerContext has a field configLocation:URI, but this field may (or may not) be initialized when the LoggerContext is constructed, and is not updated when it is reconfigured. In fact, all reconfiguring uses inner class ConfigurationFactory.ConfigurationSource. I would like to make the following changes: * make ConfigurationFactory.ConfigurationSource a top-level class * add method getConfigurationSource to the Configuration interface * remove field configLocation (and getter/setter) from LoggerContext Client code that needs LoggerContext.getConfigLocation() can instead call LoggerContext.getConfiguration().getConfigurationSource(). This is more reliable than getConfigLocation() as this URI is often null and may not be in sync with the LoggerContext's Configuration after a reconfigure. Thoughts?
