Java LoggerContextListenerModelHandler-class And Method Code Example

The logback.classic.model.LoggerContextListenerModelHandler class is used to handle the listener elements in the logback configuration file. It is responsible for creating LoggerContextListener instances and adding them to the LoggerContext based on the configuration. Here's an example of how you might use the LoggerContextListenerModelHandler class in a Java application:

import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.model.LoggerContextListenerModel;
import ch.qos.logback.classic.model.LoggerContextListenerModelHandler;
import ch.qos.logback.core.joran.spi.JoranException;
import ch.qos.logback.core.joran.spi.RuleStore;

public class MyApplication {
  public static void main(String[] args) {
    LoggerContext loggerContext = new LoggerContext();
    RuleStore rs = new RuleStore(loggerContext);
    LoggerContextListenerModelHandler listenerHandler = new LoggerContextListenerModelHandler(loggerContext);
    // adding listener rules
    rs.addRule(new ElementSelector("configuration/listener"), listenerHandler);
    try {
        // do parsing here
    } catch (JoranException e) {

In this example, a LoggerContext and RuleStore are created. Then, we added the listener handler via addRule(new ElementSelector("configuration/listener"), listenerHandler);.

After adding the listener handler, you can parse your configuration file and then use the install method of your ConfigurationModel or JoranConfigurator class to install the configuration to your logger context

It is worth noting that this is just a sample, you need to have a logback.xml or logback-test.xml file in your classpath or configure it manually. Also you can define your custom listener and pass it to the constructor of LoggerContextListenerModel class and then use it via LoggerContextListenerModelHandler class.