swt - How to use log4j in an Eclipse RCP?

Question

How to use log4j logging API in an Eclipse RCP project?

As a workaround U tried to create a new OSGI Bundle which has a log4j jars, below is the bundle structure:

I've crated a basic RCP application with a view(template) named loggingtest.I've included the bundle log4j in the dependencies tab of loggingtest project.In the Activator start method i placed the following code

Logger logger = Logger.getLogger(Activator.class);
logger.info("Info starting");
logger.warn("Warning starting");
logger.error("Error starting");

so everything is fine so far I'm able to use log4j API and half way through,i was puzzled as where to place the log4j.properties file,how can i proceed further to get a log file with all log statements.

to be more precise below is the content of my manifest file of loggingtest project

Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: LoggingTest
Bundle-SymbolicName: LoggingTest; singleton:=true
Bundle-Version: 1.0.0.qualifier
Bundle-Activator: loggingtest.Activator
Require-Bundle: org.eclipse.ui,
 org.eclipse.core.runtime,
 log4j;bundle-version="1.0.0"
Bundle-ActivationPolicy: lazy
Bundle-RequiredExecutionEnvironment: JavaSE-1.6

Answer 1

There is a posting how-to setup Log4J in an OSGi-Environment. Also consider using Pax Logging when working with OSGi.