how to configure KafkaAppender in log4j2 with Programmatic Configuration way? - log4j

Question

code below is the example given by the apache log4j2 ,but how can i configure KafkaAppender in this way?
#Plugin(name = "CustomConfigurationFactory", category = ConfigurationFactory.CATEGORY)
#Order(50)
public class CustomConfigurationFactory extends ConfigurationFactory {
static Configuration createConfiguration(final String name, ConfigurationBuilder<BuiltConfiguration> builder) {
builder.setConfigurationName(name);
builder.setStatusLevel(Level.INFO);
// builder.add(builder.newFilter("ThresholdFilter", Filter.Result.ACCEPT, Filter.Result.NEUTRAL).
// addAttribute("level", Level.DEBUG));
AppenderComponentBuilder appenderBuilder = builder.newAppender("Stdout", "CONSOLE").
addAttribute("target", ConsoleAppender.Target.SYSTEM_OUT);
appenderBuilder.add(builder.newLayout("PatternLayout").
addAttribute("pattern", "%d [%t] %-5level: %msg%n%throwable"));
// appenderBuilder.add(builder.newFilter("MarkerFilter", Filter.Result.DENY,
// Filter.Result.NEUTRAL).addAttribute("marker", "FLOW"));
AppenderComponentBuilder kafkaAppender = builder.newAppender("Stdout", "CONSOLE").
addAttribute("target", ConsoleAppender.Target.SYSTEM_OUT);
builder.add(appenderBuilder);
builder.add(builder.newLogger("org.apache.logging.log4j", Level.DEBUG).
add(builder.newAppenderRef("Stdout")).
addAttribute("additivity", false));
builder.add(builder.newRootLogger(Level.INFO).add(builder.newAppenderRef("Stdout")));
return builder.build();
}
}

Answer 1

i solved it ,
final AppenderComponentBuilder ddlKafkaAppender = builder.newAppender("ddl-kafka", "Kafka").addAttribute("topic", config.getDdlTopic());
ddlKafkaAppender.addComponent(builder.newProperty("bootstrap.servers", config.getHost()));
ddlKafkaAppender.add(builder.newLayout("PatternLayout").
addAttribute("pattern", "%message"));
builder.add(ddlKafkaAppender);
final AppenderComponentBuilder sqlKafkaAppender = builder.newAppender("sql-kafka", "Kafka").addAttribute("topic", config.getSqlTopic());
sqlKafkaAppender.addComponent(builder.newProperty("bootstrap.servers", config.getHost()));
sqlKafkaAppender.add(builder.newLayout("PatternLayout").
addAttribute("pattern", "%message"));
builder.add(sqlKafkaAppender);
builder.add(builder.newLogger("org.apache.logging.log4j", Level.DEBUG).
add(builder.newAppenderRef("Stdout")).
addAttribute("additivity", false));
builder.add(builder.newLogger("sql", Level.INFO).
add(builder.newAppenderRef("sql-kafka")));
builder.add(builder.newLogger("ddl", Level.INFO).
add(builder.newAppenderRef("ddl-kafka")));