this.out = out;
    }

    @Override
    public void transferInitiated(TransferEvent event) {
        String action = event.getRequestType() == TransferEvent.RequestType.PUT ? "Uploading" : "Downloading";
        String direction = event.getRequestType() == TransferEvent.RequestType.PUT ? "to" : "from";

        TransferResource resource = event.getResource();

        this.out = out;
    }

    @Override
    public void transferInitiated(TransferEvent event) {
        String action = event.getRequestType() == TransferEvent.RequestType.PUT ? "Uploading" : "Downloading";
        String direction = event.getRequestType() == TransferEvent.RequestType.PUT ? "to" : "from";

        TransferResource resource = event.getResource();
        StringBuilder message = new StringBuilder();

        this.out = (out != null) ? out : System.out;
    }

    @Override
    public void transferInitiated(TransferEvent event) {
        String message = event.getRequestType() == TransferEvent.RequestType.PUT ? "Uploading" : "Downloading";

        println(
                "transferInitiated",
                message + ": " + event.getResource().getRepositoryUrl()
                        + event.getResource().getResourceName());
    }

                .build());
        options.addOption(Option.builder(NO_TRANSFER_PROGRESS)
                .longOpt("no-transfer-progress")
                .desc("Do not display transfer progress when downloading or uploading")
                .build());
        options.addOption(Option.builder()
                .longOpt(COLOR)
                .hasArg()
                .optionalArg(true)

            options.addOption(Option.builder(NO_TRANSFER_PROGRESS)
                    .longOpt("no-transfer-progress")
                    .desc("Do not display transfer progress when downloading or uploading")
                    .build());
            options.addOption(Option.builder(CACHE_ARTIFACT_NOT_FOUND)
                    .longOpt("cache-artifact-not-found")
                    .hasArg()
                    .desc(

    }

    @Override
    public void putArtifactMetadata(File source, ArtifactMetadata artifactMetadata, ArtifactRepository repository)
            throws TransferFailedException {
        logger.info("Uploading " + artifactMetadata);
        putRemoteFile(repository, source, repository.pathOfRemoteRepositoryMetadata(artifactMetadata), null);
    }

    @Override
    public void putRemoteFile(

This can be very useful for setting up **resources** that you need to use for the whole app, and that are **shared** among requests, and/or that you need to **clean up** afterwards. For example, a database connection pool, or loading a shared machine learning model.

## Use Case

Let's start with an example **use case** and then see how to solve it with this.

 but is ready to use other logging implementations: SLF4J is responsible for loading the implementation, referred to as
 {{{http://www.slf4j.org/manual.html#swapping}"SLF4J bindings"}}.

 Logging configuration loading is actually done by logging implementation, without any Maven extensions to support merging
 Maven installation configuration with per-user configuration for example:

import org.apache.maven.building.Source;

/**
 * Provides access to the contents of a POM independently of the backing store (e.g. file system, database, memory).
 * <p>
 * This interface does not support loading of parent POM(s) from the same backing store, integrators are strongly
 * encouraged to implement {@link ModelSource2} instead of implementing this interface directly.
 *
 * @see ModelSource2

import java.util.Enumeration;
import java.util.Properties;

import org.apache.maven.cli.logging.impl.UnsupportedSlf4jBindingConfiguration;
import org.slf4j.ILoggerFactory;

/**
 * Slf4jConfiguration factory, loading implementations from <code>META-INF/maven/slf4j-configuration.properties</code>
 * configuration files in class loader: key is the class name of the ILoggerFactory, value is the class name of
 * the corresponding Slf4jConfiguration.