import org.eclipse.aether.transfer.AbstractTransferListener;
import org.eclipse.aether.transfer.TransferCancelledException;
import org.eclipse.aether.transfer.TransferEvent;
import org.eclipse.aether.transfer.TransferResource;

/**
 * AbstractMavenTransferListener
 */
public abstract class AbstractMavenTransferListener extends AbstractTransferListener {
    public static final String STYLE = ".transfer:-faint";

                        output.put(string, string);
                        System.out.print(o);
                    }
                },
                true));
        TransferResource resource =
                new TransferResource(null, null, "http://maven.org/test/test-resource", new File(""), null);
        resource.setContentLength(size - 1);

import org.eclipse.aether.transfer.AbstractTransferListener;
import org.eclipse.aether.transfer.TransferCancelledException;
import org.eclipse.aether.transfer.TransferEvent;
import org.eclipse.aether.transfer.TransferResource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Slf4jMavenTransferListener
 */
public class Slf4jMavenTransferListener extends AbstractTransferListener {

    protected final Logger out;

            @Override
            public void transferFailed(TransferEvent event) {}
        };

        SimplexTransferListener listener = new SimplexTransferListener(delegate);

        TransferResource resource =
                new TransferResource(null, null, "http://maven.org/test/test-resource", new File("file"), null);
        DefaultRepositorySystemSession session = new DefaultRepositorySystemSession(h -> false); // no close handle

 */
package org.apache.maven.cli.transfer;

import java.io.File;

import org.apache.maven.api.annotations.Nullable;
import org.eclipse.aether.transfer.TransferResource;

/**
 * Immutable identifier of a {@link TransferResource}.
 * The {@link TransferResource} is not immutable and does not implement {@code Objects#equals} and {@code Objects#hashCode} methods,
 * making it not very suitable for usage in collections.
 */

import org.eclipse.aether.transfer.AbstractTransferListener;
import org.eclipse.aether.transfer.TransferEvent;
import org.eclipse.aether.transfer.TransferResource;

public class ConsoleTransferListener extends AbstractTransferListener {

    private PrintStream out;

    private Map<TransferResource, Long> downloads = new ConcurrentHashMap<>();

    private int lastLength;

    public ConsoleTransferListener() {
        this(null);

import org.apache.maven.api.services.MessageBuilderFactory;
import org.eclipse.aether.transfer.TransferCancelledException;
import org.eclipse.aether.transfer.TransferEvent;
import org.eclipse.aether.transfer.TransferResource;

/**
 * Console download progress meter.
 * <p>
 * This listener is not thread-safe and should be wrapped in the {@link SimplexTransferListener} in a multi-threaded scenario.
 */