public void metadataInstalling(RepositoryEvent event) {
        println("metadataInstalling", event.getMetadata() + " to " + event.getFile());
    }

    @Override
    public void metadataInvalid(RepositoryEvent event) {
        println("metadataInvalid", event.getMetadata().toString());
    }

    @Override
    public void metadataResolved(RepositoryEvent event) {

        dispatcher.onEvent(event);
        delegate.metadataInstalling(event);
    }

    @Override
    public void metadataInvalid(RepositoryEvent event) {
        dispatcher.onEvent(event);
        delegate.metadataInvalid(event);
    }

    @Override
    public void metadataResolved(RepositoryEvent event) {
        dispatcher.onEvent(event);

                logger.warn(e.getMessage(), e);
            } else {
                logger.warn(e.getMessage());
            }
        }
    }

    @Override
    public void metadataInvalid(RepositoryEvent event) {
        Exception exception = event.getException();

        Object metadata;
        if (event.getMetadata().getFile() != null) {
            metadata = event.getMetadata().getFile();

            Metadata metadata,
            ArtifactRepository repository,
            Exception exception) {
        RepositoryEvent.Builder event = new RepositoryEvent.Builder(session, EventType.METADATA_INVALID);
        event.setTrace(trace);
        event.setMetadata(metadata);
        event.setException(exception);
        event.setRepository(repository);

        repositoryEventDispatcher.dispatch(event.build());

            Metadata metadata,
            ArtifactRepository repository,
            Exception exception) {
        RepositoryEvent.Builder event = new RepositoryEvent.Builder(session, EventType.METADATA_INVALID);
        event.setTrace(trace);
        event.setMetadata(metadata);
        event.setException(exception);
        event.setRepository(repository);

        repositoryEventDispatcher.dispatch(event.build());