Add appender programmatically

[clemi2408]

Hey,
i am using Spring Boot and logback.
I try to use Loki appender using runtime credentials provided via environment variables.
I saw that logback.xml supports substitution of environment variables, but this is not really nice if one chains url parameters.

I tried to create the log appender via code but its not sending logs to the endpoint.

This is my code to create the Appender:

    private Loki4jAppender getLoki4jAppender(final LoggerContext loggerContext) {

        final AbstractHttpSender.BasicAuth basicAuth = new AbstractHttpSender.BasicAuth();
        basicAuth.setPassword(environment.getArgusPassword());
        basicAuth.setUsername(environment.getArgusUser());

        final JavaHttpSender javaHttpSender = new JavaHttpSender();
        javaHttpSender.setUrl(environment.getArgusLogUrl());
        javaHttpSender.setAuth(basicAuth);

        final Loki4jEncoder loki4jEncoder = new JsonEncoder();

        final Loki4jAppender appender = new Loki4jAppender();

        appender.setHttp(javaHttpSender);
        appender.setContext(loggerContext);
        appender.setBatchMaxItems(1);

        appender.setFormat(loki4jEncoder);

        appender.setDrainOnStop(true);
        appender.setVerbose(true);

        return appender;
    }

Currently i try to add it to all available loggers:

final LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();

            final Loki4jAppender appender = getLoki4jAppender(loggerContext);
            for(Logger logger : loggerContext.getLoggerList()) {

                log.debug("Adding loki appender to the logger '{}'", logger.getName());
                logger.addAppender(appender);
                
            }

I use the following dependencies:

implementation 'com.github.loki4j:loki-logback-appender:1.5.1'

Thanks for Your Help

Clem