[LOG4J2-1721] Composite configuration using log4jConfiguration context parameter

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7
• Fix Version/s: 2.11.1
• Component/s: Configurators, Web/Servlet
• Labels: features
• Assignee: Unassigned
• Reporter: Pastrie
• Created: 21/Nov/16 15:02
• Updated: 03/Jul/18 21:12
• Resolved: 03/Jul/18 05:57

Description

Log4j allows multiple configuration files to be used by specifying them as a list of comma separated file paths on log4j.configurationFile property. This feature is not available in web environment since the log4jConfiguration context parameter accepts a single Path/File/URI.

My proposal is to apply some small changes in the Log4jWebInitializerImpl class

• change method getConfigURI to return List<URI> instead of URI.

Log4jWebInitializerImpl.java

if (configLocation != null) {
	if (configLocation.contains(",")) {
		final String[] parts = configLocation.split(",");
		final List<URI> uris = new ArrayList<>(parts.length);
		for (final String part : parts) {
			final URL url = servletContext.getResource(part);
			if (url != null) {
				final URI uri = url.toURI();
				LOGGER.debug("getConfigURI found resource [{}] in servletContext at [{}]", uri, configLocation);
				uris.add(url);
			}
		}
	}

• change method initializeNonJndi

Log4jWebInitializerImpl.java

[...]
final List<URI> listUri = getConfigURI(location);
this.loggerContext = Configurator.initialize(this.name, this.getClassLoader(), listUri, this.servletContext);

Issue Links

• links to: GitHub Pull Request #176