Using a XML File (log4j2.xml) to configure Log4j 2

Question

I want to use the new Log4J 2 - Java Logging Framework. Everything work fine, but I tried since a hour to load a custom configuration file to configure the logging (like log

Answer 1

My 2 cents:

Software system: log4j 2, NetBeans and TestNG.

I had the same problem, but with the testing environment.

In default, (that is, in log4j2.xml file located in src/) the logging level is set to error. But when running the tests, I want the logging to be trace. And, of course logged to some more or less hardcoded file.

That is, originally I did something like:

public class someTestClass {
       static final Logger log=LogManager.getLogger("test.someTestClass");
......
@Test
public void SomeMethod(){

System.setProperty("log4j.configurationFile", "resources/log4j2_conf.xml");

log.trace("This will not show because the default logging level is ERROR
and the resources/log4j2_conf.xml is not loaded");

}

The problem is that by the time the System.setProperty instruction will be executed, the log4j will be already be set (That is, the static final Logger log =... will be executed first.)

What I did, is use the @BeforeClass like this:

 public class someTestClass {
    Logger log;      
    @BeforeClass
    public void setLogger(){
        SetEnv.SetEnvironment();
        log = LogManager.getLogger("TestRealClientRealServer");
    }
......
    @Test
    public void SomeMethod(){

        log.trace("This will show, because in log4j2_conf.xml
 the root level is set to TRACE");

    }
}

BTW, resources/ can be placed in test packages so you don't ship the "test" log4j setup.

Hope it helps