How to use ch.qos.logback.classic.sift

public SiftingJoranConfiguratorBase<ILoggingEvent> getSiftingJoranConfigurator(String discriminatingValue) {
  return new SiftingJoranConfigurator(key, discriminatingValue, parentPropertyMap);
}

@Override
public void end(InterpretationContext ic, String name) throws ActionException {
  ic.removeInPlayListener(this);
  Object o = ic.peekObject();
  if (o instanceof SiftingAppender) {
    SiftingAppender sa = (SiftingAppender) o;
    Map<String, String> propertyMap = ic.getCopyOfPropertyMap();
    AppenderFactoryUsingJoran appenderFactory = new AppenderFactoryUsingJoran(seList, sa.getDiscriminatorKey(), propertyMap);
    sa.setAppenderFactory(appenderFactory);
  }
}

@Override
public void start() {
  int errors = 0;
  if (OptionHelper.isEmpty(key)) {
    errors++;
    addError("The \"Key\" property must be set");
  }
  if (OptionHelper.isEmpty(defaultValue)) {
    errors++;
    addError("The \"DefaultValue\" property must be set");
  }
  if (errors == 0) {
    started = true;
  }
}

@Override
public void end(InterpretationContext ec, String name) throws ActionException {
 ec.removeInPlayListener(this);
 Object o = ec.peekObject();
 if (o instanceof SiftingAppender) {
  SiftingAppender sa = (SiftingAppender) o;
  AppenderFactory appenderFactory = new AppenderFactory(seList, sa
    .getDiscriminatorKey());
  sa.setAppenderFactory(appenderFactory);
 }
}

rs.addRule(new ElementSelector("configuration/evaluator"), new EvaluatorAction());
rs.addRule(new ElementSelector("configuration/appender/sift"), new SiftAction());
rs.addRule(new ElementSelector("configuration/appender/sift/*"), new NOPAction());

private static Discriminator<ILoggingEvent> getMdcBasedDiscriminator(final String key) {
  final MDCBasedDiscriminator discriminator = new MDCBasedDiscriminator();
  discriminator.setKey(key);
  discriminator.setDefaultValue("Unknown");
  discriminator.start();
  return discriminator;
}

  @SuppressWarnings("unchecked")
  public Appender<ILoggingEvent> getAppender() {
    Map<String, Object> omap = interpreter.getInterpretationContext().getObjectMap();
    HashMap<String, Appender<?>> appenderMap = (HashMap<String, Appender<?>>) omap.get(ActionConst.APPENDER_BAG);
    oneAndOnlyOneCheck(appenderMap);
    Collection<Appender<?>> values = appenderMap.values();
    if (values.size() == 0) {
      return null;
    }
    return (Appender<ILoggingEvent>) values.iterator().next();
  }
}

@Override
public void end(InterpretationContext ic, String name) throws ActionException {
 ic.removeInPlayListener(this);
 Object o = ic.peekObject();
 if (o instanceof SiftingAppender) {
  SiftingAppender sa = (SiftingAppender) o;
  Map<String, String> propertyMap = ic.getCopyOfPropertyMap();
  AppenderFactoryUsingJoran appenderFactory = new AppenderFactoryUsingJoran(seList, sa
    .getDiscriminatorKey(), propertyMap);
  sa.setAppenderFactory(appenderFactory);
 }
}

@Override
public void end(InterpretationContext ec, String name) throws ActionException {
 ec.removeInPlayListener(this);
 Object o = ec.peekObject();
 if (o instanceof SiftingAppender) {
  SiftingAppender sa = (SiftingAppender) o;
  AppenderFactory appenderFactory = new AppenderFactory(seList, sa
    .getDiscriminatorKey());
  sa.setAppenderFactory(appenderFactory);
 }
}

public SiftingJoranConfiguratorBase<ILoggingEvent> getSiftingJoranConfigurator(String discriminatingValue) {
 return new SiftingJoranConfigurator(key, discriminatingValue, parentPropertyMap);
}

@Override
public void start() {
 int errors = 0;
 if (OptionHelper.isEmpty(key)) {
  errors++;
  addError("The \"Key\" property must be set");
 }
 if (OptionHelper.isEmpty(defaultValue)) {
  errors++;
  addError("The \"DefaultValue\" property must be set");
 }
 if (errors == 0) {
  started = true;
 }
}

rs.addRule(new ElementSelector("configuration/evaluator"), new EvaluatorAction());
rs.addRule(new ElementSelector("configuration/appender/sift"), new SiftAction());
rs.addRule(new ElementSelector("configuration/appender/sift/*"), new NOPAction());

 @SuppressWarnings("unchecked")
 public Appender<ILoggingEvent> getAppender() {
  Map<String, Object> omap = interpreter.getInterpretationContext().getObjectMap();
  HashMap appenderMap = (HashMap) omap.get(ActionConst.APPENDER_BAG);
  oneAndOnlyOneCheck(appenderMap);
  Collection values = appenderMap.values();
  if(values.size() == 0) {
   return null;
  }
  return (Appender<ILoggingEvent>) values.iterator().next();
 }
}

@Override
public void end(InterpretationContext ic, String name) throws ActionException {
 ic.removeInPlayListener(this);
 Object o = ic.peekObject();
 if (o instanceof SiftingAppender) {
  SiftingAppender sa = (SiftingAppender) o;
  Map<String, String> propertyMap = ic.getCopyOfPropertyMap();
  AppenderFactoryUsingJoran appenderFactory = new AppenderFactoryUsingJoran(seList, sa
    .getDiscriminatorKey(), propertyMap);
  sa.setAppenderFactory(appenderFactory);
 }
}

public SiftingJoranConfiguratorBase<ILoggingEvent> getSiftingJoranConfigurator(String discriminatingValue) {
 return new SiftingJoranConfigurator(key, discriminatingValue, parentPropertyMap);
}

@Override
public void end(InterpretationContext ic, String name) throws ActionException {
  ic.removeInPlayListener(this);
  Object o = ic.peekObject();
  if (o instanceof SiftingAppender) {
    SiftingAppender sa = (SiftingAppender) o;
    Map<String, String> propertyMap = ic.getCopyOfPropertyMap();
    AppenderFactoryUsingJoran appenderFactory = new AppenderFactoryUsingJoran(seList, sa.getDiscriminatorKey(), propertyMap);
    sa.setAppenderFactory(appenderFactory);
  }
}

public SiftingJoranConfiguratorBase<ILoggingEvent> getSiftingJoranConfigurator(String discriminatingValue) {
  return new SiftingJoranConfigurator(key, discriminatingValue, parentPropertyMap);
}

@Override
public void end(InterpretationContext ic, String name) throws ActionException {
  ic.removeInPlayListener(this);
  Object o = ic.peekObject();
  if (o instanceof SiftingAppender) {
    SiftingAppender sa = (SiftingAppender) o;
    Map<String, String> propertyMap = ic.getCopyOfPropertyMap();
    AppenderFactoryUsingJoran appenderFactory = new AppenderFactoryUsingJoran(seList, sa.getDiscriminatorKey(), propertyMap);
    sa.setAppenderFactory(appenderFactory);
  }
}

public SiftingJoranConfiguratorBase<ILoggingEvent> getSiftingJoranConfigurator(String discriminatingValue) {
 return new SiftingJoranConfigurator(key, discriminatingValue);
}

@Override
public void end(InterpretationContext ic, String name) throws ActionException {
  ic.removeInPlayListener(this);
  Object o = ic.peekObject();
  if (o instanceof SiftingAppender) {
    SiftingAppender sa = (SiftingAppender) o;
    Map<String, String> propertyMap = ic.getCopyOfPropertyMap();
    AppenderFactoryUsingJoran appenderFactory = new AppenderFactoryUsingJoran(seList, sa.getDiscriminatorKey(), propertyMap);
    sa.setAppenderFactory(appenderFactory);
  }
}