import org.apache.maven.api.cli.Logger;

import static java.util.Objects.requireNonNull;

/**
 * Proto {@link Logger} that just passes to functioning {@link org.slf4j.Logger} instance.
 */
public class Slf4jLogger implements Logger {
    private final org.slf4j.Logger logger;

    public Slf4jLogger(org.slf4j.Logger logger) {
        this.logger = requireNonNull(logger, "logger");
    }

    @Override

import org.slf4j.Logger;

/**
 */
class LoggingRepositoryListener extends AbstractRepositoryListener {

    private final Logger logger;

    LoggingRepositoryListener(Logger logger) {
        this.logger = logger;
    }

    @Override
    public void artifactInstalling(RepositoryEvent event) {

import org.apache.maven.plugin.logging.Log;
import org.codehaus.plexus.logging.Logger;

/**
 * @author jdcasey
 */
public class DefaultLog implements Log {

    private final Logger logger;

    public DefaultLog(Logger logger) {
        this.logger = logger;
    }

    @Override
    public void debug(CharSequence content) {
        logger.debug(toString(content));
    }

        }

        if (logger.isDebugEnabled()) {
            try {
                ManagementFactory.getRuntimeMXBean().getInputArguments().stream().forEach(s -> logger.debug("Parameter: {}", s));
                System.getProperties().entrySet().stream().forEach(e -> logger.debug("Property: {}={}", e.getKey(), e.getValue()));
                System.getenv().entrySet().forEach(e -> logger.debug("Env: {}={}", e.getKey(), e.getValue()));

        // verify
        InOrder inOrder = inOrder(logger);
        inOrder.verify(logger).info("");
        inOrder.verify(logger).info("------------------< org.apache.maven:maven-embedder >-------------------");
        inOrder.verify(logger).info("Building Apache Maven Embedder 3.5.4-SNAPSHOT");
        inOrder.verify(logger).info(adaptDirSeparator("  from maven-embedder/pom.xml"));

                task = jobHelper.startMonitorTask(jobLog);
            }

            if (logger.isDebugEnabled()) {
                logger.debug("Starting job: id={}, scriptType={}, script={}", id, scriptType, script);
            } else if (scheduledJob.isLoggingEnabled() && logger.isInfoEnabled()) {
                logger.info("Starting job: id={}", id);
            }

        this.model = model;
        this.logger = logger;
    }

    /**
     *
     * @param model the model, must not be {@code null}
     * @param type the type
     * @param logger the logger, must not be {@code null}
     */
    protected DefaultToolchain(ToolchainModel model, String type, Logger logger) {
        this(model, logger);
        this.type = type;
    }

    @Override

 *   <li>Old document deletion after successful crawling</li>
 *   <li>Crawling execution monitoring and timing</li>
 * </ul>
 */
public class DataIndexHelper {

    /** Logger instance for this class */
    private static final Logger logger = LogManager.getLogger(DataIndexHelper.class);

    /** Parameter key for controlling deletion of old documents */
    private static final String DELETE_OLD_DOCS = "delete_old_docs";

        this(LoggerFactory.getLogger(logger.getName()));
    }

    public DebugConfigurationListener(Logger logger) {
        this.logger = logger;
    }

    @Override
    public void notifyFieldChangeUsingSetter(String fieldName, Object value, Object target) {
        if (logger.isDebugEnabled()) {
            logger.debug("  (s) " + fieldName + " = " + toString(value));
        }
    }

            if (logger.isDebugEnabled()) {
                logger.debug("Silent token acquisition successful");
            }
            return result;
        } catch (final Exception e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Silent token acquisition failed: {}", e.getMessage());
            }
            return null;