PropertyConfigurator in log4j2

Question

I\'m migrating log4j 1.2.8 to log4j 2.3. Everything works fine, beside that I\'m not finding any any alternative for the PropertyConfigurator.

Is there another class to

Answer 1

Maybe this can help you?

How do I reconfigure log4j2 in code with a specific configuration file? See the below example. Be aware that this LoggerContext class is not part of the public API so your code may break with any minor release.

// import org.apache.logging.log4j.core.LoggerContext;

LoggerContext context = (org.apache.logging.log4j.core.LoggerContext) LogManager.getContext(false);
File file = new File("path/to/a/different/log4j2.xml");


// this will force a reconfiguration
context.setConfigLocation(file.toURI());**

Answer 2

Log4j 2 currently supports configuration with XML, JSON or YAML. While properties files may also be supported in the near future the syntax will certainly be different from Log4j 1.

Answer 3

Here my solution to the same problem:

web.xml

<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

    <context-param>
        <param-name>isLog4jContextSelectorNamed</param-name>
        <param-value>false</param-value>
    </context-param>

    <!-- ... and so on -->

</web-app>

LoggerHelper.java

    import java.io.File;
    import org.apache.logging.log4j.LogManager;
    import org.apache.logging.log4j.core.LoggerContext;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;

    public final class LoggerHelper {

      public static Logger INSTANCE;

      public static void initialize() {    
        String        fileName = "<PATH>/log4j.xml";
        LoggerContext context  = (LoggerContext)LogManager.getContext(false);

        context.setConfigLocation(new File(fileName).toURI());
        INSTANCE = LoggerFactory.getLogger(LoggerHelper.class);

        String logMessage = String.format("Initialized (%s).", fileName);
        System.out.println(logMessage);
        INSTANCE.info(logMessage);
      }

    }