*/
public class BaseSlf4jConfiguration implements Slf4jConfiguration {
    private static final Logger LOGGER = LoggerFactory.getLogger(BaseSlf4jConfiguration.class);

    public void setRootLoggerLevel(Level level) {
        LOGGER.warn("setRootLoggerLevel: operation not supported");
    }

    public void activate() {
        LOGGER.warn("activate(): operation not supported");
    }

import org.slf4j.LoggerFactory;

/**
 * Configuration for slf4j-simple.
 *
 * @since 3.1.0
 */
public class MavenSimpleConfiguration extends BaseSlf4jConfiguration {
    @Override
    public void setRootLoggerLevel(Level level) {
        String value;
        switch (level) {
            case DEBUG:
                value = "debug";
                break;

            case INFO:
                value = "info";

/**
 * Configuration for slf4j-log4j2.
 *
 * @since 3.1.0
 */
public class Log4j2Configuration extends BaseSlf4jConfiguration {
    @Override
    public void setRootLoggerLevel(Level level) {
        String value;
        switch (level) {
            case DEBUG:
                value = "debug";
                break;

            case INFO:
                value = "info";

import org.slf4j.LoggerFactory;

/**
 * Configuration for slf4j-logback.
 *
 * @since 3.1.0
 */
public class LogbackConfiguration extends BaseSlf4jConfiguration {
    @Override
    public void setRootLoggerLevel(Level level) {
        ch.qos.logback.classic.Level value;
        switch (level) {
            case DEBUG:
                value = ch.qos.logback.classic.Level.DEBUG;
                break;

     * Level
     */
    enum Level {
        DEBUG,
        INFO,
        ERROR
    }

    /**
     * Set root logging level.
     *
     * @param level the level
     */
    void setRootLoggerLevel(Level level);

    /**
     * Activate logging implementation configuration (if necessary).
     */
    void activate();

            cliRequest.request.setLoggingLevel(MavenExecutionRequest.LOGGING_LEVEL_DEBUG);
            slf4jConfiguration.setRootLoggerLevel(Slf4jConfiguration.Level.DEBUG);
        } else if (cliRequest.quiet) {
            cliRequest.request.setLoggingLevel(MavenExecutionRequest.LOGGING_LEVEL_ERROR);
            slf4jConfiguration.setRootLoggerLevel(Slf4jConfiguration.Level.ERROR);
        }
        // else fall back to default log level specified in conf

        } else if (mavenOptions.quiet().orElse(false)) {
            context.loggerLevel = Slf4jConfiguration.Level.ERROR;
        }
        context.slf4jConfiguration.setRootLoggerLevel(context.loggerLevel);
        // else fall back to default log level specified in conf
        // see https://issues.apache.org/jira/browse/MNG-2570