java - Set log4j log level

Question

I'm currently working on a project that uses log4j. I'm running a testcase (junit) and would like to set the log level to trace so that I can see if all the values are correct. Classes that use logging in the project contain a line like the following:

private static final Log LOG = LogFactory.getLog(MatchTaskTest.class);

and use a like like this to do the actual debugging

LOG.trace("value");

I have never used log4j before, does anybody know how I can change the log level just for the testcase, preferably simply by defining a parameter in eclipse's run configuration dialog.

Answer 1

In your junit class put:

Logger.getRootLogger().setLevel(Level.TRACE);

somewhere before the execution of the tested method. It will set the threshold level of the root logger to TRACE.